This is a draft cheat sheet. It is a work in progress and is not finished yet.
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Assertions
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Basic Equality |
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Asserts equal using deep equal comparison
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Spies |
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Asserts mock function was called
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.toHaveBeenCalledTimes(n)
Asserts mock function was called n
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.toHaveBeenCalledWith(arg1, arg2, ...)
Asserts mock function was called with provided arguments
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.toHaveBeenLastCalledWith(arg1, arg2, ...)
Asserts mock function was called with provided arguments on last invocation
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Booleanish |
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Asserts value is true in a boolean context
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Asserts value is false in a boolean context
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Numeric Comparisons |
.toBeGreaterThan(number)
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.toBeGreaterThanOrEqual(number)
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.toBeLessThan(number)
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.toBeLessThanOrEqual(number)
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.toBeCloseTo(number, numDigits)
Asserts number is close to another at given precision
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Type Assertions |
.toBeInstanceOf(Class)
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Containment |
Asserts an array contains item using ===
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.toContainEqual(item)
Asserts an array contains item using deep equal comparison
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.toMatchObject(object)
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.toMatch(regexpOrString)
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Errors |
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Snapshot Testing |
.toMatchSnapshot(optionalString)
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.toThrowErrorMatchingSnapshot()
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