Method "YiiRequirementChecker::check()" has been implemented.

tests/unit/framework/requirements/YiiRequirementCheckerTest.php

@@ -10,8 +10,49 @@ use yiiunit\TestCase;
  */
 class YiiRequirementCheckerTest extends TestCase
 {
-	public function testCreate() {
-		$requirementChecker = new YiiRequirementChecker();
-		$this->assertTrue(is_object($requirementChecker));
+	public function testCheck()
+	{
+		$requirementsChecker = new YiiRequirementChecker();
+
+		$requirements = array(
+			'requirementPass' => array(
+				'name' => 'Requirement 1',
+				'mandatory' => true,
+				'condition' => true,
+				'by' => 'Requirement 1',
+				'memo' => 'Requirement 1',
+			),
+			'requirementError' => array(
+				'name' => 'Requirement 2',
+				'mandatory' => true,
+				'condition' => false,
+				'by' => 'Requirement 2',
+				'memo' => 'Requirement 2',
+			),
+			'requirementWarning' => array(
+				'name' => 'Requirement 3',
+				'mandatory' => false,
+				'condition' => false,
+				'by' => 'Requirement 3',
+				'memo' => 'Requirement 3',
+			),
+		);
+
+		$checkResult = $requirementsChecker->check($requirements);
+		$summary = $checkResult['summary'];
+
+		$this->assertEquals(count($requirements), $summary['total'], 'Wrong summary total!');
+		$this->assertEquals(1, $summary['errors'], 'Wrong summary errors!');
+		$this->assertEquals(1, $summary['warnings'], 'Wrong summary warnings!');
+
+		$checkedRequirements = $checkResult['requirements'];
+
+		$this->assertEquals(false, $checkedRequirements['requirementPass']['error'], 'Passed requirement has an error!');
+		$this->assertEquals(false, $checkedRequirements['requirementPass']['warning'], 'Passed requirement has a warning!');
+
+		$this->assertEquals(true, $checkedRequirements['requirementError']['error'], 'Error requirement has no error!');
+
+		$this->assertEquals(false, $checkedRequirements['requirementWarning']['error'], 'Error requirement has an error!');
+		$this->assertEquals(true, $checkedRequirements['requirementWarning']['warning'], 'Error requirement has no warning!');
 	}
 }

yii/requirements/YiiRequirementChecker.php

@@ -8,10 +8,107 @@
 /**
  * YiiRequirementChecker allows checking, if current system meets the requirements for running the application.
  *
+ * @property array|null $result the check results.
+ *
  * @author Paul Klimov <klimov.paul@gmail.com>
  * @since 2.0
  */
 class YiiRequirementChecker
 {
+	function check($requirements)
+	{
+		if (!is_array($requirements)) {
+			$this->usageError("Requirements must be an array!");
+		}
+		$summary = array(
+			'total' => 0,
+			'errors' => 0,
+			'warnings' => 0,
+		);
+		foreach ($requirements as $key => $rawRequirement) {
+			$requirement = $this->normalizeRequirement($rawRequirement, $key);
+
+			$summary['total']++;
+			if (!$requirement['condition']) {
+				if ($requirement['mandatory']) {
+					$requirement['error'] = true;
+					$requirement['warning'] = true;
+					$summary['errors']++;
+				} else {
+					$requirement['error'] = false;
+					$requirement['warning'] = true;
+					$summary['warnings']++;
+				}
+			} else {
+				$requirement['error'] = false;
+				$requirement['warning'] = false;
+			}
+			$requirements[$key] = $requirement;
+		}
+		$result = array(
+			'summary' => $summary,
+			'requirements' => $requirements,
+		);
+		return $result;
+	}
+
+	/**
+	 * Normalizes requirement ensuring it has correct format.
+	 * @param array $requirement raw requirement.
+	 * @param int $requirementKey requirement key in the list.
+	 * @return array normalized requirement.
+	 */
+	function normalizeRequirement($requirement, $requirementKey=0)
+	{
+		if (!is_array($requirement)) {
+			$this->usageError('Requirement must be an array!');
+		}
+		if (!array_key_exists('condition', $requirement)) {
+			$this->usageError("Requirement '{$requirementKey}' has no condition!");
+		} else {
+			$evalPrefix = 'eval:';
+			if (is_string($requirement['condition']) && strpos($requirement['condition'], $evalPrefix)===0) {
+				$expression = substr($requirement['condition'], strlen($evalPrefix));
+				$requirement['condition'] = $this->evaluateExpression($expression);
+			}
+		}
+		if (!array_key_exists('name', $requirement)) {
+			$requirement['name'] = is_numeric($requirementKey) ? 'Requirement #'.$requirementKey : $requirementKey;
+		}
+		if (!array_key_exists('mandatory', $requirement)) {
+			if (array_key_exists('required', $requirement)) {
+				$requirement['mandatory'] = $requirement['required'];
+			} else {
+				$requirement['mandatory'] = false;
+			}
+		}
+		if (!array_key_exists('by', $requirement)) {
+			$requirement['by'] = 'Unknown';
+		}
+		if (!array_key_exists('memo', $requirement)) {
+			$requirement['memo'] = '';
+		}
+		return $requirement;
+	}
 
+	/**
+	 * Displays a usage error.
+	 * This method will then terminate the execution of the current application.
+	 * @param string $message the error message
+	 */
+	function usageError($message)
+	{
+		echo "Error: $message\n\n";
+		exit(1);
+	}
+
+	/**
+	 * Evaluates a PHP expression under the context of this class.
+	 * @param string $expression a PHP expression to be evaluated.
+	 * @return mixed the expression result.
+	 */
+	function evaluateExpression($expression)
+	{
+		return eval('return '.$expression.';');
+	}
 }