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Implement be
matcher
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@ -14,5 +14,23 @@ module Spectator::DSL
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macro eq(expected)
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macro eq(expected)
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::Spectator::Matchers::EqualityMatcher.new({{expected.stringify}}, {{expected}})
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::Spectator::Matchers::EqualityMatcher.new({{expected.stringify}}, {{expected}})
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end
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end
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# Indicates that some value should semantically equal another.
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# The `===` operator is used for this check.
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# This has identical behavior as a `when` condition in a `case` block.
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#
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# Examples:
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# ```
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# expect(1 + 2).to be(3)
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# expect(5).to be(Int32) # Using `#be_a` instead is recommened here.
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# expect(5).to be(.odd?) # Using `#be_odd` instead is recommended here.
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# expect(tuple).to be({1, 2})
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# ```
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#
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# See https://crystal-lang.org/reference/syntax_and_semantics/case.html
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# for more examples of what could be used here.
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macro be(expected)
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::Spectator::Matchers::CaseMatcher.new({{expected.stringify}}, {{expected}})
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end
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end
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end
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end
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end
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25
src/spectator/matchers/case_matcher.cr
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25
src/spectator/matchers/case_matcher.cr
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@ -0,0 +1,25 @@
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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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# Determines whether the matcher is satisfied with the value given to it.
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# True is returned if the match was successful, false otherwise.
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def match?(partial : Expectations::ValueExpectationPartial(ActualType)) : Bool forall ActualType
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partial.actual === expected
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end
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# Describes the condition that satisfies the matcher.
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# This is informational and displayed to the end-user.
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def message(partial : Expectations::ValueExpectationPartial(ActualType)) : String forall ActualType
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"Expected #{partial.label} to semantically equal #{label} (using ===)"
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end
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# Describes the condition that won't satsify the matcher.
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# This is informational and displayed to the end-user.
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def negated_message(partial : Expectations::ValueExpectationPartial(ActualType)) : String forall ActualType
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"Expected #{partial.label} to not semantically equal #{label} (using ===)"
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end
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end
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end
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