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    0.2.0 • Public • Published


    Additional assertions for referee.


    At the moment, only matchers for arrays and array-like objects are provided.

    Array / Sequence Matchers

    Contains by Identity (===)

    Similar to assert.contains, the following assertions are provided:

    • assert.containsOnce(array, element) passes if array contains element exactly once.

    • assert.containsInOrder(array, a, b, c, ...) passes if array contains all passed-in values in that order.

    Contains by Match

    The following assertions check for matching elements. See the documentation of assert.match to understand how referee matches.

    • assert.containsMatch(array, matcher) passes if any element in array matches matcher.

    • assert.containsMatchOnce(array, matcher) passes if exactly one element in array matches matcher.

    • assert.containsMatchesInOrder(array, matcherA, matcherB, ...) passes if elements matching the passed-in matchers are contained in the given order.

    Contains by Equality

    These assertions check sequence elements by equality. Read the documentation of assert.equals to understand how referee checks for equality.

    • assert.containsEqual(array, value) passes if any element in array equals value.

    • assert.containsEqualOnce(array, value) passes if exactly one element in array equals value.

    • assert.containsEqualsInOrder(array, valueA, valueB, ...) passes if elements equaling the passed-in values are contained in the given order.

    Contains Substring

    This assertion checks whether a string (or string representation of an object) contains a substring.


    Contributions welcome! Please make sure that your assertion functions are properly tested. Don’t test assert.myAssert(), but only the assertion function.


    npm i referee-more-assertions

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    • davidaurelio