CharArraysTests: Fix test bug.

elastic · Aug 16, 2018 · 039babd · 039babd
1 parent 7f6802c
commit 039babd
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/libs/core/src/test/java/org/elasticsearch/common/CharArraysTests.java b/libs/core/src/test/java/org/elasticsearch/common/CharArraysTests.java
@@ -55,7 +55,10 @@ public void testCharsBeginsWith() {
         assertTrue(CharArrays.charsBeginsWith(prefix, prefixedValue));
 
         final String modifiedPrefix = randomBoolean() ? prefix.substring(1) : prefix.substring(0, prefix.length() - 1);
-        final char[] nonMatchingValue = modifiedPrefix.concat(randomAlphaOfLengthBetween(0, 12)).toCharArray();
+        char[] nonMatchingValue;
+        do {
+            nonMatchingValue = modifiedPrefix.concat(randomAlphaOfLengthBetween(0, 12)).toCharArray();
+        } while (new String(nonMatchingValue).startsWith(prefix));
         assertFalse(CharArrays.charsBeginsWith(prefix, nonMatchingValue));
         assertTrue(CharArrays.charsBeginsWith(modifiedPrefix, nonMatchingValue));
     }