Add more tests examples and fix wrongly capitalized funcation name

src/Mutator/Unwrap/AbstractUnwrapMutator.php

@@ -26,17 +26,17 @@ abstract protected function getParameterIndex(): int;
      *
      * @return Node\Param;
      */
-    public function mutate(Node $node)
+    final public function mutate(Node $node)
     {
         return $node->args[$this->getParameterIndex()];
     }
 
-    protected function mutatesNode(Node $node): bool
+    final protected function mutatesNode(Node $node): bool
     {
         if (!$node instanceof Node\Expr\FuncCall) {
             return false;
         }
 
-        return $node->name->toString() === $this->getFunctionName();
+        return $node->name->toLowerString() === strtolower($this->getFunctionName());
     }
 }

tests/Mutator/Unwrap/UnwrapArrayFilterTest.php

@@ -26,7 +26,7 @@ public function test_mutator($input, $expected = null): void
 
     public function provideMutationCases(): \Generator
     {
-        yield [
+        yield 'It mutates correctly when provided with a array' => [
             <<<'PHP'
 <?php
 
@@ -40,19 +40,113 @@ public function provideMutationCases(): \Generator
 PHP
         ];
 
-        yield [
+        yield 'It mutates correctly when provided with a constant' => [
             <<<'PHP'
 <?php
 
-$a = array_filter(['A', 1, 'C'], function($var): bool {
-    return is_int($var);
-});
+$a = array_filter(\Class_With_Const::Const, 'is_int');
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = \Class_With_Const::Const;
+PHP
+        ];
+
+        yield 'It mutates correctly when a backslash is in front of array_filter' => [
+            <<<'PHP'
+<?php
+
+$a = \array_filter(['A', 1, 'C'], 'is_int');
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = ['A', 1, 'C'];
+PHP
+        ];
+
+        yield 'It does not mutate other array_ calls' => [
+            <<<'PHP'
+<?php
+
+$a = array_map('strtolower', ['A', 'B', 'C']);
+PHP
+        ];
+
+        yield 'It does not mutate functions named array_filter' => [
+            <<<'PHP'
+<?php
+
+function array_filter($text, $other)
+{
+}
+PHP
+        ];
+
+        yield 'It mutates correctly within if statements' => [
+            <<<'PHP'
+<?php
+
+$a = ['A', 1, 'C'];
+if (array_filter($a, 'is_int') === $a) {
+    return true;
+}
 PHP
             ,
             <<<'PHP'
 <?php
 
 $a = ['A', 1, 'C'];
+if ($a === $a) {
+    return true;
+}
+PHP
+        ];
+
+        yield 'It mutates correctly when array_map is wrongly capitalized' => [
+            <<<'PHP'
+<?php
+
+$a = aRrAy_FiLtEr(['A', 1, 'C'], 'is_int');
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = ['A', 1, 'C'];
+PHP
+        ];
+
+        yield 'It mutates correctly when array_map uses another function as input' => [
+            <<<'PHP'
+<?php
+
+$a = array_filter($foo->bar(), 'is_int');
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = $foo->bar();
+PHP
+        ];
+
+        yield 'It mutates correctly when provided with a more complex situation' => [
+            <<<'PHP'
+<?php
+
+$a = array_map('strtolower', array_filter(['A', 1, 'C'], function($char): bool {
+    return !is_int($char);
+}));
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = array_map('strtolower', ['A', 1, 'C']);
 PHP
         ];
     }

tests/Mutator/Unwrap/UnwrapArrayMapTest.php

@@ -26,7 +26,7 @@ public function test_mutator($input, $expected = null): void
 
     public function provideMutationCases(): \Generator
     {
-        yield [
+        yield 'It mutates correctly when provided with a array' => [
             <<<'PHP'
 <?php
 
@@ -40,19 +40,113 @@ public function provideMutationCases(): \Generator
 PHP
         ];
 
-        yield [
+        yield 'It mutates correctly when provided with a constant' => [
             <<<'PHP'
 <?php
 
-$a = array_map(function(string $letter): string {
-    return strtolower($letter);
-}, ['A', 'B', 'C']);
+$a = array_map('strtolower', \Class_With_Const::Const);
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = \Class_With_Const::Const;
+PHP
+        ];
+
+        yield 'It mutates correctly when a backslash is in front of array_map' => [
+            <<<'PHP'
+<?php
+
+$a = \array_map('strtolower', ['A', 'B', 'C']);
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = ['A', 'B', 'C'];
+PHP
+        ];
+
+        yield 'It does not mutate other array_ calls' => [
+            <<<'PHP'
+<?php
+
+$a = array_filter([1, 2, 3], 'is_int');
+PHP
+        ];
+
+        yield 'It does not mutate functions named array_map' => [
+            <<<'PHP'
+<?php
+
+function array_map($text, $other)
+{
+}
+PHP
+        ];
+
+        yield 'It mutates correctly within if statements' => [
+            <<<'PHP'
+<?php
+
+$a = ['A', 'B', 'C'];
+if (array_map('strtolower', $a) === $a) {
+    return true;
+}
 PHP
             ,
             <<<'PHP'
 <?php
 
 $a = ['A', 'B', 'C'];
+if ($a === $a) {
+    return true;
+}
+PHP
+        ];
+
+        yield 'It mutates correctly when array_map is wrongly capitalized' => [
+            <<<'PHP'
+<?php
+
+$a = ArRaY_mAp('strtolower', ['A', 'B', 'C']);
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = ['A', 'B', 'C'];
+PHP
+        ];
+
+        yield 'It mutates correctly when array_map uses another function as input' => [
+            <<<'PHP'
+<?php
+
+$a = array_map('strtolower', $foo->bar());
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = $foo->bar();
+PHP
+        ];
+
+        yield 'It mutates correctly when provided with a more complex situation' => [
+            <<<'PHP'
+<?php
+
+$a = array_filter(array_map(function(string $letter): string {
+    return strtolower($letter);
+}, ['A', 'B', 'C']), 'is_int');
+PHP
+            ,
+            <<<'PHP'
+<?php
+
+$a = array_filter(['A', 'B', 'C'], 'is_int');
 PHP
         ];
     }