diff core/tests/Drupal/Tests/Component/Utility/RandomTest.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/tests/Drupal/Tests/Component/Utility/RandomTest.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,177 @@
+<?php
+
+namespace Drupal\Tests\Component\Utility;
+
+use Drupal\Component\Utility\Random;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests random data generation.
+ *
+ * @group Utility
+ *
+ * @coversDefaultClass \Drupal\Component\Utility\Random
+ */
+class RandomTest extends TestCase {
+
+  /**
+   * The first random string passed to the test callback.
+   *
+   * @see \Drupal\Tests\Component\Utility\RandomTest::_RandomStringValidate()
+   *
+   * @var string
+   */
+  protected $firstStringGenerated = '';
+
+  /**
+   * Tests unique random string generation.
+   *
+   * @covers ::string
+   */
+  public function testRandomStringUniqueness() {
+    $strings = [];
+    $random = new Random();
+    for ($i = 0; $i <= 50; $i++) {
+      $str = $random->string(1, TRUE);
+      $this->assertFalse(isset($strings[$str]), 'Generated duplicate random string ' . $str);
+      $strings[$str] = TRUE;
+    }
+  }
+
+  /**
+   * Tests unique random name generation.
+   *
+   * @covers ::name
+   */
+  public function testRandomNamesUniqueness() {
+    $names = [];
+    $random = new Random();
+    for ($i = 0; $i <= 10; $i++) {
+      $str = $random->name(1, TRUE);
+      $this->assertFalse(isset($names[$str]), 'Generated duplicate random name ' . $str);
+      $names[$str] = TRUE;
+    }
+  }
+
+  /**
+   * Tests infinite loop prevention whilst generating random names.
+   *
+   * @covers ::name
+   */
+  public function testRandomNameException() {
+    // There are fewer than 100 possibilities so an exception should occur to
+    // prevent infinite loops.
+    $random = new Random();
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(\RuntimeException::class);
+    }
+    else {
+      $this->setExpectedException(\RuntimeException::class);
+    }
+    for ($i = 0; $i <= 100; $i++) {
+      $str = $random->name(1, TRUE);
+      $names[$str] = TRUE;
+    }
+  }
+
+  /**
+   * Tests infinite loop prevention whilst generating random strings.
+   *
+   * @covers ::string
+   */
+  public function testRandomStringException() {
+    // There are fewer than 100 possibilities so an exception should occur to
+    // prevent infinite loops.
+    $random = new Random();
+    if (method_exists($this, 'expectException')) {
+      $this->expectException(\RuntimeException::class);
+    }
+    else {
+      $this->setExpectedException(\RuntimeException::class);
+    }
+    for ($i = 0; $i <= 100; $i++) {
+      $str = $random->string(1, TRUE);
+      $names[$str] = TRUE;
+    }
+  }
+
+  /**
+   * Tests random name generation if uniqueness is not enforced.
+   *
+   * @covers ::name
+   */
+  public function testRandomNameNonUnique() {
+    // There are fewer than 100 possibilities if we were forcing uniqueness so
+    // exception would occur.
+    $random = new Random();
+    for ($i = 0; $i <= 100; $i++) {
+      $random->name(1);
+    }
+    $this->assertTrue(TRUE, 'No exception thrown when uniqueness is not enforced.');
+  }
+
+  /**
+   * Tests random string if uniqueness is not enforced.
+   *
+   * @covers ::string
+   */
+  public function testRandomStringNonUnique() {
+    // There are fewer than 100 possibilities if we were forcing uniqueness so
+    // exception would occur.
+    $random = new Random();
+    for ($i = 0; $i <= 100; $i++) {
+      $random->string(1);
+    }
+    $this->assertTrue(TRUE, 'No exception thrown when uniqueness is not enforced.');
+  }
+
+  /**
+   * Tests random object generation to ensure the expected number of properties.
+   *
+   * @covers ::object
+   */
+  public function testRandomObject() {
+    // For values of 0 and 1 \Drupal\Component\Utility\Random::object() will
+    // have different execution paths.
+    $random = new Random();
+    for ($i = 0; $i <= 1; $i++) {
+      $obj = $random->object($i);
+      $this->assertEquals($i, count(get_object_vars($obj)), 'Generated random object has expected number of properties');
+    }
+  }
+
+  /**
+   * Tests random string validation callbacks.
+   *
+   * @covers ::string
+   */
+  public function testRandomStringValidator() {
+    $random = new Random();
+    $this->firstStringGenerated = '';
+    $str = $random->string(1, TRUE, [$this, '_RandomStringValidate']);
+    $this->assertNotEquals($this->firstStringGenerated, $str);
+  }
+
+  /**
+   * Callback for random string validation.
+   *
+   * @see \Drupal\Component\Utility\Random::name()
+   * @see \Drupal\Tests\Component\Utility\RandomTest::testRandomStringValidator()
+   *
+   * @param string $string
+   *   The random string to validate.
+   *
+   * @return bool
+   *   TRUE if the random string is valid, FALSE if not.
+   */
+  public function _RandomStringValidate($string) {
+    // Return FALSE for the first generated string and any string that is the
+    // same, as the test expects a different string to be returned.
+    if (empty($this->firstStringGenerated) || $string == $this->firstStringGenerated) {
+      $this->firstStringGenerated = $string;
+      return FALSE;
+    }
+    return TRUE;
+  }
+
+}