47 lines
1.7 KiB
Crystal
47 lines
1.7 KiB
Crystal
require "./value_matcher"
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module Spectator::Matchers
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# Common matcher that tests whether two values semantically equal each other.
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# The values are compared with the === operator.
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struct CaseMatcher(ExpectedType) < ValueMatcher(ExpectedType)
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# Short text about the matcher's purpose.
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# This explains what condition satisfies the matcher.
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# The description is used when the one-liner syntax is used.
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def description : String
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"matches #{expected.label}"
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end
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# Checks whether the matcher is satisfied with the expression given to it.
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private def match?(actual : Expression(T)) : Bool forall T
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expected.value === actual.value
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end
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# Overload that takes a regex so that the operands are flipped.
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# This mimics RSpec's behavior.
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private def match?(actual : Expression(Regex)) : Bool forall T
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actual.value === expected.value
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end
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# Message displayed when the matcher isn't satisfied.
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#
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# This is only called when `#match?` returns false.
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#
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# The message should typically only contain the test expression labels.
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# Actual values should be returned by `#values`.
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private def failure_message(actual) : String
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"#{actual.label} does not match #{expected.label}"
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end
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# Message displayed when the matcher isn't satisfied and is negated.
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# This is essentially what would satisfy the matcher if it wasn't negated.
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#
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# This is only called when `#does_not_match?` returns false.
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#
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# The message should typically only contain the test expression labels.
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# Actual values should be returned by `#values`.
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private def failure_message_when_negated(actual) : String
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"#{actual.label} matched #{expected.label}"
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end
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end
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end
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