diff --git a/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php b/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php
new file mode 100644
index 00000000..da0eb4bd
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/DocumentGeneratorTest.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Category as Cat;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\Logical;
+use PhpOffice\PhpSpreadsheet\DocumentGenerator;
+use PHPUnit\Framework\TestCase;
+
+class DocumentGeneratorTest extends TestCase
+{
+    /**
+     * @dataProvider providerGenerateFunctionListByName
+     * @param array $phpSpreadsheetFunctions
+     * @param string $expected
+     * @throws \ReflectionException
+     */
+    public function testGenerateFunctionListByName(array $phpSpreadsheetFunctions, string $expected): void
+    {
+        self::assertEquals($expected, DocumentGenerator::generateFunctionListByName($phpSpreadsheetFunctions));
+    }
+
+    /**
+     * @dataProvider providerGenerateFunctionListByCategory
+     * @param array $phpSpreadsheetFunctions
+     * @param string $expected
+     * @throws \ReflectionException
+     */
+    public function testGenerateFunctionListByCategory(array $phpSpreadsheetFunctions, string $expected): void
+    {
+        self::assertEquals($expected, DocumentGenerator::generateFunctionListByCategory($phpSpreadsheetFunctions));
+    }
+
+    public function providerGenerateFunctionListByName(): array
+    {
+        return [
+            [
+                [
+                    'ABS' => ['category' => Cat::CATEGORY_MATH_AND_TRIG, 'functionCall' => 'abs'],
+                    'AND' => ['category' => Cat::CATEGORY_LOGICAL, 'functionCall' => [Logical::class, 'logicalAnd']],
+                    'IFS' => ['category' => Cat::CATEGORY_LOGICAL, 'functionCall' => [Functions::class, 'DUMMY']],
+                ],
+                <<<'EXPECTED'
+# Function list by name
+
+## A
+
+Excel Function      | Category                       | PhpSpreadsheet Function
+--------------------|--------------------------------|-------------------------------------------
+ABS                 | CATEGORY_MATH_AND_TRIG         | abs
+AND                 | CATEGORY_LOGICAL               | \PhpOffice\PhpSpreadsheet\Calculation\Logical::logicalAnd
+
+## I
+
+Excel Function      | Category                       | PhpSpreadsheet Function
+--------------------|--------------------------------|-------------------------------------------
+IFS                 | CATEGORY_LOGICAL               | **Not yet Implemented**
+
+EXPECTED
+
+            ],
+        ];
+    }
+
+    public function providerGenerateFunctionListByCategory(): array
+    {
+        return [
+            [
+                [
+                    'ABS' => ['category' => Cat::CATEGORY_MATH_AND_TRIG, 'functionCall' => 'abs'],
+                    'AND' => ['category' => Cat::CATEGORY_LOGICAL, 'functionCall' => [Logical::class, 'logicalAnd']],
+                    'IFS' => ['category' => Cat::CATEGORY_LOGICAL, 'functionCall' => [Functions::class, 'DUMMY']],
+                ],
+                <<<'EXPECTED'
+# Function list by category
+
+## CATEGORY_CUBE
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_DATABASE
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_DATE_AND_TIME
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_ENGINEERING
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_FINANCIAL
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_INFORMATION
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_LOGICAL
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+AND                 | \PhpOffice\PhpSpreadsheet\Calculation\Logical::logicalAnd
+IFS                 | **Not yet Implemented**
+
+## CATEGORY_LOOKUP_AND_REFERENCE
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_MATH_AND_TRIG
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+ABS                 | abs
+
+## CATEGORY_STATISTICAL
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+## CATEGORY_TEXT_AND_DATA
+
+Excel Function      | PhpSpreadsheet Function
+--------------------|-------------------------------------------
+
+EXPECTED
+
+            ],
+        ];
+    }
+}