PhpUnitConstructFixer - Fix handle different casing

Author: SpacePossum

src/Fixer/PhpUnit/PhpUnitConstructFixer.php

@@ -215,7 +215,7 @@ private function fixAssert(array $map, Tokens $tokens, $index, $method)
             return $sequenceIndexes[3];
         }
 
-        $tokens[$sequenceIndexes[0]] = new Token([T_STRING, $map[$firstParameterToken->getContent()]]);
+        $tokens[$sequenceIndexes[0]] = new Token([T_STRING, $map[strtolower($firstParameterToken->getContent())]]);
         $tokens->clearRange($sequenceIndexes[2], $tokens->getNextNonWhitespace($sequenceIndexes[3]) - 1);
 
         return $sequenceIndexes[3];

tests/Fixer/PhpUnit/PhpUnitConstructFixerTest.php

@@ -125,6 +125,18 @@ public function provideTestFixCases()
                 '<?php $this->assertSame(true || $a, $b); $this->assertTrue($c);',
                 '<?php $this->assertSame(true || $a, $b); $this->assertSame(true, $c);',
             ],
+            [
+                '<?php $this->assertFalse($foo);',
+                '<?php $this->assertEquals(FALSE, $foo);',
+            ],
+            [
+                '<?php $this->assertTrue($foo);',
+                '<?php $this->assertEquals(TruE, $foo);',
+            ],
+            [
+                '<?php $this->assertNull($foo);',
+                '<?php $this->assertEquals(NULL, $foo);',
+            ],
         ];
 
         return array_merge(