diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateTest.php
index 6628322a..447e504e 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateTest.php
@@ -49,7 +49,7 @@ class DateTest extends TestCase
 
         $result = DateTime::DATE(2012, 1, 31);
         //    Must return an object...
-        self::assertIsObject($result);
+        $this->assertIsObject($result);
         //    ... of the correct type
         $this->assertTrue(is_a($result, 'DateTimeInterface'));
         //    ... with the correct value
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateValueTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateValueTest.php
index 2c4e96eb..236da6c7 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateValueTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/DateValueTest.php
@@ -48,7 +48,7 @@ class DateValueTest extends TestCase
 
         $result = DateTime::DATEVALUE('2012-1-31');
         //    Must return an object...
-        self::assertIsObject($result);
+        $this->assertIsObject($result);
         //    ... of the correct type
         $this->assertTrue(is_a($result, DateTimeInterface::class));
         //    ... with the correct value
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EDateTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EDateTest.php
index 7f885096..eead7441 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EDateTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EDateTest.php
@@ -48,7 +48,7 @@ class EDateTest extends TestCase
 
         $result = DateTime::EDATE('2012-1-26', -1);
         //    Must return an object...
-        self::assertIsObject($result);
+        $this->assertIsObject($result);
         //    ... of the correct type
         $this->assertTrue(is_a($result, 'DateTimeInterface'));
         //    ... with the correct value
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EoMonthTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EoMonthTest.php
index 6092151a..5e1c52a1 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EoMonthTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/EoMonthTest.php
@@ -48,7 +48,7 @@ class EoMonthTest extends TestCase
 
         $result = DateTime::EOMONTH('2012-1-26', -1);
         //    Must return an object...
-        self::assertIsObject($result);
+        $this->assertIsObject($result);
         //    ... of the correct type
         $this->assertTrue(is_a($result, 'DateTimeInterface'));
         //    ... with the correct value
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeTest.php
index 61406f5a..8debe7a1 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeTest.php
@@ -46,7 +46,7 @@ class TimeTest extends TestCase
 
         $result = DateTime::TIME(7, 30, 20);
         //    Must return an object...
-        self::assertIsObject($result);
+        $this->assertIsObject($result);
         //    ... of the correct type
         $this->assertTrue(is_a($result, 'DateTimeInterface'));
         //    ... with the correct value
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeValueTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeValueTest.php
index d1adfc62..52fe18f6 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeValueTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/DateTime/TimeValueTest.php
@@ -47,7 +47,7 @@ class TimeValueTest extends TestCase
 
         $result = DateTime::TIMEVALUE('7:30:20');
         //    Must return an object...
-        self::assertIsObject($result);
+        $this->assertIsObject($result);
         //    ... of the correct type
         $this->assertTrue(is_a($result, 'DateTimeInterface'));
         //    ... with the correct value
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GammaLnTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GammaLnTest.php
index 02b11af3..436996ba 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GammaLnTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/GammaLnTest.php
@@ -17,10 +17,11 @@ class GammaLnTest extends TestCase
      * @dataProvider providerGAMMALN
      *
      * @param mixed $expectedResult
+     * @param $value
      */
-    public function testGAMMALN($expectedResult, ...$args)
+    public function testGAMMALN($expectedResult, $value)
     {
-        $result = Statistical::GAMMALN(...$args);
+        $result = Statistical::GAMMALN($value);
         $this->assertEquals($expectedResult, $result, '', 1E-12);
     }
 
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CharTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CharTest.php
new file mode 100644
index 00000000..7ae50fa7
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CharTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class CharTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerCHAR
+     *
+     * @param mixed $expectedResult
+     * @param $character
+     */
+    public function testCHAR($expectedResult, $character)
+    {
+        $result = TextData::CHARACTER($character);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerCHAR()
+    {
+        return require 'data/Calculation/TextData/CHAR.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CleanTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CleanTest.php
new file mode 100644
index 00000000..3286e6fd
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CleanTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class CleanTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerCLEAN
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testCLEAN($expectedResult, $value)
+    {
+        $result = TextData::TRIMNONPRINTABLE($value);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerCLEAN()
+    {
+        return require 'data/Calculation/TextData/CLEAN.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CodeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CodeTest.php
new file mode 100644
index 00000000..a22c1401
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/CodeTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class CodeTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerCODE
+     *
+     * @param mixed $expectedResult
+     * @param $character
+     */
+    public function testCODE($expectedResult, $character)
+    {
+        $result = TextData::ASCIICODE($character);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerCODE()
+    {
+        return require 'data/Calculation/TextData/CODE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
new file mode 100644
index 00000000..46ea0cb7
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ConcatenateTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class ConcatenateTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerCONCATENATE
+     *
+     * @param mixed $expectedResult
+     */
+    public function testCONCATENATE($expectedResult, ...$args)
+    {
+        $result = TextData::CONCATENATE(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerCONCATENATE()
+    {
+        return require 'data/Calculation/TextData/CONCATENATE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/DollarTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/DollarTest.php
new file mode 100644
index 00000000..af49a7d0
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/DollarTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class DollarTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerDOLLAR
+     *
+     * @param mixed $expectedResult
+     */
+    public function testDOLLAR($expectedResult, ...$args)
+    {
+        $result = TextData::DOLLAR(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerDOLLAR()
+    {
+        return require 'data/Calculation/TextData/DOLLAR.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ExactTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ExactTest.php
new file mode 100644
index 00000000..8c47be47
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ExactTest.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class ExactTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerEXACT
+     *
+     * @param mixed $expectedResult
+     * @param array $args
+     */
+    public function testEXACT($expectedResult, ...$args)
+    {
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(' ');
+        StringHelper::setCurrencyCode('$');
+
+        $result = TextData::EXACT(...$args);
+        $this->assertSame($expectedResult, $result);
+    }
+
+    /**
+     * @return array
+     */
+    public function providerEXACT()
+    {
+        return require 'data/Calculation/TextData/EXACT.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/FindTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/FindTest.php
new file mode 100644
index 00000000..86ae5e77
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/FindTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class FindTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerFIND
+     *
+     * @param mixed $expectedResult
+     */
+    public function testFIND($expectedResult, ...$args)
+    {
+        $result = TextData::SEARCHSENSITIVE(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerFIND()
+    {
+        return require 'data/Calculation/TextData/FIND.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/FixedTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/FixedTest.php
new file mode 100644
index 00000000..d46f0e48
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/FixedTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class FixedTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerFIXED
+     *
+     * @param mixed $expectedResult
+     */
+    public function testFIXED($expectedResult, ...$args)
+    {
+        $result = TextData::FIXEDFORMAT(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerFIXED()
+    {
+        return require 'data/Calculation/TextData/FIXED.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LeftTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LeftTest.php
new file mode 100644
index 00000000..18d6c258
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LeftTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class LeftTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerLEFT
+     *
+     * @param mixed $expectedResult
+     */
+    public function testLEFT($expectedResult, ...$args)
+    {
+        $result = TextData::LEFT(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerLEFT()
+    {
+        return require 'data/Calculation/TextData/LEFT.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LenTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LenTest.php
new file mode 100644
index 00000000..ad3dc00c
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LenTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class LenTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerLEN
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testLEN($expectedResult, $value)
+    {
+        $result = TextData::STRINGLENGTH($value);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerLEN()
+    {
+        return require 'data/Calculation/TextData/LEN.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LowerTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LowerTest.php
new file mode 100644
index 00000000..52fd3afe
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/LowerTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class LowerTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerLOWER
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testLOWER($expectedResult, $value)
+    {
+        $result = TextData::LOWERCASE($value);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerLOWER()
+    {
+        return require 'data/Calculation/TextData/LOWER.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/MidTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/MidTest.php
new file mode 100644
index 00000000..d0db50e0
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/MidTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class MidTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerMID
+     *
+     * @param mixed $expectedResult
+     */
+    public function testMID($expectedResult, ...$args)
+    {
+        $result = TextData::MID(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerMID()
+    {
+        return require 'data/Calculation/TextData/MID.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php
new file mode 100644
index 00000000..9de91f7e
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/NumberValueTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class NumberValueTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerNUMBERVALUE
+     *
+     * @param mixed $expectedResult
+     * @param array $args
+     */
+    public function testNUMBERVALUE($expectedResult, array $args)
+    {
+        $result = TextData::NUMBERVALUE(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerNUMBERVALUE()
+    {
+        return require 'data/Calculation/TextData/NUMBERVALUE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ProperTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ProperTest.php
new file mode 100644
index 00000000..4e1b0b76
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ProperTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class ProperTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerPROPER
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testPROPER($expectedResult, $value)
+    {
+        $result = TextData::PROPERCASE($value);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerPROPER()
+    {
+        return require 'data/Calculation/TextData/PROPER.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ReplaceTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ReplaceTest.php
new file mode 100644
index 00000000..dd4411a0
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ReplaceTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class ReplaceTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerREPLACE
+     *
+     * @param mixed $expectedResult
+     */
+    public function testREPLACE($expectedResult, ...$args)
+    {
+        $result = TextData::REPLACE(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerREPLACE()
+    {
+        return require 'data/Calculation/TextData/REPLACE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/RightTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/RightTest.php
new file mode 100644
index 00000000..64fb0e5b
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/RightTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class RightTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerRIGHT
+     *
+     * @param mixed $expectedResult
+     */
+    public function testRIGHT($expectedResult, ...$args)
+    {
+        $result = TextData::RIGHT(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerRIGHT()
+    {
+        return require 'data/Calculation/TextData/RIGHT.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/SearchTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/SearchTest.php
new file mode 100644
index 00000000..c77742b6
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/SearchTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class SearchTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerSEARCH
+     *
+     * @param mixed $expectedResult
+     */
+    public function testSEARCH($expectedResult, ...$args)
+    {
+        $result = TextData::SEARCHINSENSITIVE(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerSEARCH()
+    {
+        return require 'data/Calculation/TextData/SEARCH.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/SubstituteTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/SubstituteTest.php
new file mode 100644
index 00000000..2fdb1091
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/SubstituteTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class SubstituteTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerSUBSTITUTE
+     *
+     * @param mixed $expectedResult
+     */
+    public function testSUBSTITUTE($expectedResult, ...$args)
+    {
+        $result = TextData::SUBSTITUTE(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerSUBSTITUTE()
+    {
+        return require 'data/Calculation/TextData/SUBSTITUTE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TTest.php
new file mode 100644
index 00000000..90104a17
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class TTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerT
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testT($expectedResult, $value)
+    {
+        $result = TextData::RETURNSTRING($value);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerT()
+    {
+        return require 'data/Calculation/TextData/T.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextJoinTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextJoinTest.php
new file mode 100644
index 00000000..690db346
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextJoinTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class TextJoinTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerTEXTJOIN
+     *
+     * @param mixed $expectedResult
+     * @param array $args
+     */
+    public function testTEXTJOIN($expectedResult, array $args)
+    {
+        $result = TextData::TEXTJOIN(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerTEXTJOIN()
+    {
+        return require 'data/Calculation/TextData/TEXTJOIN.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextTest.php
new file mode 100644
index 00000000..dbcd0900
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class TextTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerTEXT
+     *
+     * @param mixed $expectedResult
+     */
+    public function testTEXT($expectedResult, ...$args)
+    {
+        //    Enforce decimal and thousands separator values to UK/US, and currency code to USD
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+
+        $result = TextData::TEXTFORMAT(...$args);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerTEXT()
+    {
+        return require 'data/Calculation/TextData/TEXT.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TrimTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TrimTest.php
new file mode 100644
index 00000000..2a9fe94e
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TrimTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class TrimTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerTRIM
+     *
+     * @param mixed $expectedResult
+     * @param $character
+     */
+    public function testTRIM($expectedResult, $character)
+    {
+        $result = TextData::TRIMSPACES($character);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerTRIM()
+    {
+        return require 'data/Calculation/TextData/TRIM.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/UpperTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/UpperTest.php
new file mode 100644
index 00000000..60c894d6
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/UpperTest.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class UpperTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerUPPER
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testUPPER($expectedResult, $value)
+    {
+        $result = TextData::UPPERCASE($value);
+        $this->assertEquals($expectedResult, $result);
+    }
+
+    public function providerUPPER()
+    {
+        return require 'data/Calculation/TextData/UPPER.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ValueTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ValueTest.php
new file mode 100644
index 00000000..b6c29f3d
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/ValueTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\TextData;
+use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
+use PHPUnit\Framework\TestCase;
+
+class ValueTest extends TestCase
+{
+    public function setUp()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    public function tearDown()
+    {
+        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(',');
+        StringHelper::setCurrencyCode('$');
+    }
+
+    /**
+     * @dataProvider providerVALUE
+     *
+     * @param mixed $expectedResult
+     * @param $value
+     */
+    public function testVALUE($expectedResult, $value)
+    {
+        StringHelper::setDecimalSeparator('.');
+        StringHelper::setThousandsSeparator(' ');
+        StringHelper::setCurrencyCode('$');
+
+        $result = TextData::VALUE($value);
+        $this->assertEquals($expectedResult, $result, '', 1E-8);
+    }
+
+    public function providerVALUE()
+    {
+        return require 'data/Calculation/TextData/VALUE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/TextDataTest.php b/tests/PhpSpreadsheetTests/Calculation/TextDataTest.php
deleted file mode 100644
index 32d7605f..00000000
--- a/tests/PhpSpreadsheetTests/Calculation/TextDataTest.php
+++ /dev/null
@@ -1,430 +0,0 @@
-<?php
-
-namespace PhpOffice\PhpSpreadsheetTests\Calculation;
-
-use PhpOffice\PhpSpreadsheet\Calculation\Functions;
-use PhpOffice\PhpSpreadsheet\Calculation\TextData;
-use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
-use PHPUnit\Framework\TestCase;
-
-class TextDataTest extends TestCase
-{
-    public function setUp()
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-        StringHelper::setDecimalSeparator('.');
-        StringHelper::setThousandsSeparator(',');
-        StringHelper::setCurrencyCode('$');
-    }
-
-    public function tearDown()
-    {
-        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
-        StringHelper::setDecimalSeparator('.');
-        StringHelper::setThousandsSeparator(',');
-        StringHelper::setCurrencyCode('$');
-    }
-
-    /**
-     * @dataProvider providerCHAR
-     *
-     * @param mixed $expectedResult
-     */
-    public function testCHAR($expectedResult, ...$args)
-    {
-        $result = TextData::CHARACTER(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerCHAR()
-    {
-        return require 'data/Calculation/TextData/CHAR.php';
-    }
-
-    /**
-     * @dataProvider providerCODE
-     *
-     * @param mixed $expectedResult
-     */
-    public function testCODE($expectedResult, ...$args)
-    {
-        $result = TextData::ASCIICODE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerCODE()
-    {
-        return require 'data/Calculation/TextData/CODE.php';
-    }
-
-    /**
-     * @dataProvider providerCONCATENATE
-     *
-     * @param mixed $expectedResult
-     */
-    public function testCONCATENATE($expectedResult, ...$args)
-    {
-        $result = TextData::CONCATENATE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerCONCATENATE()
-    {
-        return require 'data/Calculation/TextData/CONCATENATE.php';
-    }
-
-    /**
-     * @dataProvider providerLEFT
-     *
-     * @param mixed $expectedResult
-     */
-    public function testLEFT($expectedResult, ...$args)
-    {
-        $result = TextData::LEFT(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerLEFT()
-    {
-        return require 'data/Calculation/TextData/LEFT.php';
-    }
-
-    /**
-     * @dataProvider providerMID
-     *
-     * @param mixed $expectedResult
-     */
-    public function testMID($expectedResult, ...$args)
-    {
-        $result = TextData::MID(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerMID()
-    {
-        return require 'data/Calculation/TextData/MID.php';
-    }
-
-    /**
-     * @dataProvider providerRIGHT
-     *
-     * @param mixed $expectedResult
-     */
-    public function testRIGHT($expectedResult, ...$args)
-    {
-        $result = TextData::RIGHT(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerRIGHT()
-    {
-        return require 'data/Calculation/TextData/RIGHT.php';
-    }
-
-    /**
-     * @dataProvider providerLOWER
-     *
-     * @param mixed $expectedResult
-     */
-    public function testLOWER($expectedResult, ...$args)
-    {
-        $result = TextData::LOWERCASE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerLOWER()
-    {
-        return require 'data/Calculation/TextData/LOWER.php';
-    }
-
-    /**
-     * @dataProvider providerUPPER
-     *
-     * @param mixed $expectedResult
-     */
-    public function testUPPER($expectedResult, ...$args)
-    {
-        $result = TextData::UPPERCASE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerUPPER()
-    {
-        return require 'data/Calculation/TextData/UPPER.php';
-    }
-
-    /**
-     * @dataProvider providerPROPER
-     *
-     * @param mixed $expectedResult
-     */
-    public function testPROPER($expectedResult, ...$args)
-    {
-        $result = TextData::PROPERCASE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerPROPER()
-    {
-        return require 'data/Calculation/TextData/PROPER.php';
-    }
-
-    /**
-     * @dataProvider providerLEN
-     *
-     * @param mixed $expectedResult
-     */
-    public function testLEN($expectedResult, ...$args)
-    {
-        $result = TextData::STRINGLENGTH(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerLEN()
-    {
-        return require 'data/Calculation/TextData/LEN.php';
-    }
-
-    /**
-     * @dataProvider providerSEARCH
-     *
-     * @param mixed $expectedResult
-     */
-    public function testSEARCH($expectedResult, ...$args)
-    {
-        $result = TextData::SEARCHINSENSITIVE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerSEARCH()
-    {
-        return require 'data/Calculation/TextData/SEARCH.php';
-    }
-
-    /**
-     * @dataProvider providerFIND
-     *
-     * @param mixed $expectedResult
-     */
-    public function testFIND($expectedResult, ...$args)
-    {
-        $result = TextData::SEARCHSENSITIVE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerFIND()
-    {
-        return require 'data/Calculation/TextData/FIND.php';
-    }
-
-    /**
-     * @dataProvider providerREPLACE
-     *
-     * @param mixed $expectedResult
-     */
-    public function testREPLACE($expectedResult, ...$args)
-    {
-        $result = TextData::REPLACE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerREPLACE()
-    {
-        return require 'data/Calculation/TextData/REPLACE.php';
-    }
-
-    /**
-     * @dataProvider providerSUBSTITUTE
-     *
-     * @param mixed $expectedResult
-     */
-    public function testSUBSTITUTE($expectedResult, ...$args)
-    {
-        $result = TextData::SUBSTITUTE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerSUBSTITUTE()
-    {
-        return require 'data/Calculation/TextData/SUBSTITUTE.php';
-    }
-
-    /**
-     * @dataProvider providerTRIM
-     *
-     * @param mixed $expectedResult
-     */
-    public function testTRIM($expectedResult, ...$args)
-    {
-        $result = TextData::TRIMSPACES(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerTRIM()
-    {
-        return require 'data/Calculation/TextData/TRIM.php';
-    }
-
-    /**
-     * @dataProvider providerCLEAN
-     *
-     * @param mixed $expectedResult
-     */
-    public function testCLEAN($expectedResult, ...$args)
-    {
-        $result = TextData::TRIMNONPRINTABLE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerCLEAN()
-    {
-        return require 'data/Calculation/TextData/CLEAN.php';
-    }
-
-    /**
-     * @dataProvider providerDOLLAR
-     *
-     * @param mixed $expectedResult
-     */
-    public function testDOLLAR($expectedResult, ...$args)
-    {
-        $result = TextData::DOLLAR(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerDOLLAR()
-    {
-        return require 'data/Calculation/TextData/DOLLAR.php';
-    }
-
-    /**
-     * @dataProvider providerFIXED
-     *
-     * @param mixed $expectedResult
-     */
-    public function testFIXED($expectedResult, ...$args)
-    {
-        $result = TextData::FIXEDFORMAT(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerFIXED()
-    {
-        return require 'data/Calculation/TextData/FIXED.php';
-    }
-
-    /**
-     * @dataProvider providerT
-     *
-     * @param mixed $expectedResult
-     */
-    public function testT($expectedResult, ...$args)
-    {
-        $result = TextData::RETURNSTRING(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerT()
-    {
-        return require 'data/Calculation/TextData/T.php';
-    }
-
-    /**
-     * @dataProvider providerTEXT
-     *
-     * @param mixed $expectedResult
-     */
-    public function testTEXT($expectedResult, ...$args)
-    {
-        //    Enforce decimal and thousands separator values to UK/US, and currency code to USD
-        StringHelper::setDecimalSeparator('.');
-        StringHelper::setThousandsSeparator(',');
-        StringHelper::setCurrencyCode('$');
-
-        $result = TextData::TEXTFORMAT(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerTEXT()
-    {
-        return require 'data/Calculation/TextData/TEXT.php';
-    }
-
-    /**
-     * @dataProvider providerVALUE
-     *
-     * @param mixed $expectedResult
-     */
-    public function testVALUE($expectedResult, ...$args)
-    {
-        StringHelper::setDecimalSeparator('.');
-        StringHelper::setThousandsSeparator(' ');
-        StringHelper::setCurrencyCode('$');
-
-        $result = TextData::VALUE(...$args);
-        self::assertEquals($expectedResult, $result, '', 1E-8);
-    }
-
-    public function providerVALUE()
-    {
-        return require 'data/Calculation/TextData/VALUE.php';
-    }
-
-    /**
-     * @dataProvider providerEXACT
-     *
-     * @param mixed $expectedResult
-     * @param array $args
-     */
-    public function testEXACT($expectedResult, ...$args)
-    {
-        StringHelper::setDecimalSeparator('.');
-        StringHelper::setThousandsSeparator(' ');
-        StringHelper::setCurrencyCode('$');
-
-        $result = TextData::EXACT(...$args);
-        self::assertSame($expectedResult, $result);
-    }
-
-    /**
-     * @return array
-     */
-    public function providerEXACT()
-    {
-        return require 'data/Calculation/TextData/EXACT.php';
-    }
-
-    /**
-     * @dataProvider providerTEXTJOIN
-     *
-     * @param mixed $expectedResult
-     * @param array $args
-     */
-    public function testTEXTJOIN($expectedResult, array $args)
-    {
-        $result = TextData::TEXTJOIN(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerTEXTJOIN()
-    {
-        return require 'data/Calculation/TextData/TEXTJOIN.php';
-    }
-
-    /**
-     * @dataProvider providerNUMBERVALUE
-     *
-     * @param mixed $expectedResult
-     * @param array $args
-     */
-    public function testNUMBERVALUE($expectedResult, array $args)
-    {
-        $result = TextData::NUMBERVALUE(...$args);
-        self::assertEquals($expectedResult, $result);
-    }
-
-    public function providerNUMBERVALUE()
-    {
-        return require 'data/Calculation/TextData/NUMBERVALUE.php';
-    }
-}