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Ensure char array test uses different values #47238

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Sep 30, 2019
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Ensure char array test uses different values #47238

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6 changes: 4 additions & 2 deletions libs/core/src/test/java/org/elasticsearch/common/CharArraysTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -69,8 +69,10 @@ public void testConstantTimeEquals() {
assertTrue(CharArrays.constantTimeEquals(value, value));
assertTrue(CharArrays.constantTimeEquals(value.toCharArray(), value.toCharArray()));

final String other = randomAlphaOfLengthBetween(1, 32);
assertFalse(CharArrays.constantTimeEquals(value, other));
// we want a different string, so ensure the first character is different, but the same overall length
final String other = new String(
randomAlphaOfLengthNotBeginningWith(value.substring(0, 1), value.length(), value.length()));
assertFalse("value: " + value + ", other: " + other, CharArrays.constantTimeEquals(value, other));
assertFalse(CharArrays.constantTimeEquals(value.toCharArray(), other.toCharArray()));
}

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