Issue #3109767 by quietone, mtodor, Kristen Pol, larowlan: Unable generate...

Issue #3109767 by quietone, mtodor, Kristen Pol, larowlan: Unable generate sample data with defined random seed for the "string" or "link" field type

core/lib/Drupal/Component/Utility/Random.php

@@ -139,8 +139,6 @@ public function name($length = 8, $unique = FALSE) {
    * @return string
    */
   public function word($length) {
-    mt_srand((double) microtime() * 1000000);
-
     $vowels = ["a", "e", "i", "o", "u"];
     $cons = ["b", "c", "d", "g", "h", "j", "k", "l", "m", "n", "p", "r", "s", "t", "u", "v", "w", "tr",
       "cr", "br", "fr", "th", "dr", "ch", "ph", "wr", "st", "sp", "sw", "pr",

core/tests/Drupal/Tests/Component/Utility/RandomTest.php

@@ -142,6 +142,26 @@ public function testRandomStringValidator() {
     $this->assertNotEquals($this->firstStringGenerated, $str);
   }
 
+  /**
+   * Tests random word.
+   *
+   * @covers ::word
+   */
+  public function testRandomWordValidator() {
+    $random = new Random();
+    // Without a seed, test a different word is returned each time.
+    $this->firstStringGenerated = $random->word(5);
+    $next_str = $random->word(5);
+    $this->assertNotEquals($this->firstStringGenerated, $next_str);
+
+    // With a seed, test the same word is returned each time.
+    mt_srand(0);
+    $this->firstStringGenerated = $random->word(5);
+    mt_srand(0);
+    $next_str = $random->word(5);
+    $this->assertEquals($this->firstStringGenerated, $next_str);
+  }
+
   /**
    * Callback for random string validation.
    *