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Test: ensure char[] doesn't being with prefix #34816

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Merged
merged 1 commit into from
Oct 25, 2018
Merged

Test: ensure char[] doesn't being with prefix #34816

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12 changes: 10 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 @@ -43,12 +43,12 @@ public void testBytesToUtf8Chars() {
assertArrayEquals(expectedChars, convertedChars);
}

@AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/34765")
public void testCharsBeginsWith() {
assertFalse(CharArrays.charsBeginsWith(randomAlphaOfLength(4), null));
assertFalse(CharArrays.charsBeginsWith(null, null));
assertFalse(CharArrays.charsBeginsWith(null, randomAlphaOfLength(4).toCharArray()));
assertFalse(CharArrays.charsBeginsWith(randomAlphaOfLength(2), randomAlphaOfLengthBetween(3, 8).toCharArray()));
final String undesiredPrefix = randomAlphaOfLength(2);
assertFalse(CharArrays.charsBeginsWith(undesiredPrefix, randomAlphaOfLengthNotBeginningWith(undesiredPrefix, 3, 8)));

final String prefix = randomAlphaOfLengthBetween(2, 4);
assertTrue(CharArrays.charsBeginsWith(prefix, prefix.toCharArray()));
Expand All @@ -73,4 +73,12 @@ public void testConstantTimeEquals() {
assertFalse(CharArrays.constantTimeEquals(value, other));
assertFalse(CharArrays.constantTimeEquals(value.toCharArray(), other.toCharArray()));
}

private char[] randomAlphaOfLengthNotBeginningWith(String undesiredPrefix, int min, int max) {
char[] nonMatchingValue;
do {
nonMatchingValue = randomAlphaOfLengthBetween(min, max).toCharArray();
} while (new String(nonMatchingValue).startsWith(undesiredPrefix));
return nonMatchingValue;
}
}