Added tests for JSON files.

README.md

@@ -307,6 +307,8 @@ passed to the processing callbacks:
 - `writeComposerJson()` - Write the contents of the array to the `composer.json`
   file.
 - `replaceInPath()` - Replace a string in a file or all files in a directory.
+- `replaceInPathBetween()` - Replace a string in a file or all files in a directory between two markers.
+- `uncommentLine()` - Uncomment a line in a file or all files in a directory.
 - `arrayUnsetDeep()` - Unset a fully or partially matched value in a nested
    array, removing empty arrays.
 

tests/phpunit/Unit/ReplaceInPathTest.php → tests/phpunit/Unit/FilesTest.php

@@ -14,11 +14,11 @@
 use PHPUnit\Framework\TestStatus\Failure;
 
 /**
- * Test the scaffold create-project command with no-install.
+ * Test for helpers used in operations on files.
  */
 #[CoversClass(CustomizeCommand::class)]
 #[Group('unit')]
-class ReplaceInPathTest extends TestCase {
+class FilesTest extends TestCase {
 
   use DirsTrait;
   use ReflectionTrait;
@@ -374,6 +374,60 @@ public static function dataProviderUncommentLine(): array {
     ];
   }
 
+  #[DataProvider('dataProviderReadComposerJson')]
+  public function testReadComposerJson(string $before, string $after, ?string $exception_message = NULL): void {
+    if (!empty($before)) {
+      $this->createFileTree($this->dirs->sut, ['composer.json' => $before]);
+    }
+
+    if ($exception_message) {
+      $this->expectExceptionMessage(\RuntimeException::class);
+      $this->expectExceptionMessage($exception_message);
+    }
+
+    CustomizeCommand::readComposerJson($this->dirs->sut . '/composer.json');
+
+    if (!$exception_message) {
+      $this->assertFileTree($this->dirs->sut, ['composer.json' => $after]);
+    }
+  }
+
+  /**
+   * Data provider for testUncommentLine.
+   *
+   * @return array
+   *   The data.
+   */
+  public static function dataProviderReadComposerJson(): array {
+    return [
+      [
+        '{}',
+        '{}',
+      ],
+      [
+        '',
+        '',
+        'Failed to read composer.json',
+      ],
+      [
+        '{',
+        '{',
+        'Failed to decode composer.json',
+      ],
+    ];
+  }
+
+  public function testWriteComposerJson(): void {
+    CustomizeCommand::writeComposerJson($this->dirs->sut . '/composer.json', [1, 2, 3]);
+    $this->assertFileTree($this->dirs->sut, [
+      'composer.json' => "[
+    1,
+    2,
+    3
+]",
+    ]);
+  }
+
   /**
    * Creates a file tree from the provided structure.
    *