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Support casting types with should statements

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Michael Miller 2022-12-19 22:40:55 -07:00
parent acf810553a
commit c4bcf54b98
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3 changed files with 115 additions and 30 deletions
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51
src/spectator/should.cr
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@ -30,6 +30,23 @@ class Object
::Spectator::Harness.current.report(expectation)
end
# Asserts that some criteria defined by the matcher is satisfied.
# Allows a custom message to be used.
# Returns the expected value cast as the expected type, if the matcher is satisfied.
def should(matcher : ::Spectator::Matchers::TypeMatcher(U), message = nil, *, _file = __FILE__, _line = __LINE__) forall U
actual = ::Spectator::Value.new(self)
location = ::Spectator::Location.new(_file, _line)
match_data = matcher.match(actual)
expectation = ::Spectator::Expectation.new(match_data, location, message)
if ::Spectator::Harness.current.report(expectation)
return self if self.is_a?(U)
raise "Spectator bug: expected value should have cast to #{U}"
else
raise TypeCastError.new("Expected value should be a #{U}, but was actually #{self.class}")
end
end
# Works the same as `#should` except the condition is inverted.
# When `#should` succeeds, this method will fail, and vice-versa.
def should_not(matcher, message = nil, *, _file = __FILE__, _line = __LINE__)
@ -40,6 +57,40 @@ class Object
::Spectator::Harness.current.report(expectation)
end
# Asserts that some criteria defined by the matcher is not satisfied.
# Allows a custom message to be used.
# Returns the expected value cast without the unexpected type, if the matcher is satisfied.
def should_not(matcher : ::Spectator::Matchers::TypeMatcher(U), message = nil, *, _file = __FILE__, _line = __LINE__) forall U
actual = ::Spectator::Value.new(self)
location = ::Spectator::Location.new(_file, _line)
match_data = matcher.negated_match(actual)
expectation = ::Spectator::Expectation.new(match_data, location, message)
if ::Spectator::Harness.current.report(expectation)
return self unless self.is_a?(U)
raise "Spectator bug: expected value should not be #{U}"
else
raise TypeCastError.new("Expected value is not expected to be a #{U}, but was actually #{self.class}")
end
end
# Asserts that some criteria defined by the matcher is not satisfied.
# Allows a custom message to be used.
# Returns the expected value cast as a non-nillable type, if the matcher is satisfied.
def should_not(matcher : ::Spectator::Matchers::NilMatcher, message = nil, *, _file = __FILE__, _line = __LINE__)
actual = ::Spectator::Value.new(self)
location = ::Spectator::Location.new(_file, _line)
match_data = matcher.negated_match(actual)
expectation = ::Spectator::Expectation.new(match_data, location, message)
if ::Spectator::Harness.current.report(expectation)
return self unless self.nil?
raise "Spectator bug: expected value should not be nil"
else
raise NilAssertionError.new("Expected value should not be nil.")
end
end
# Works the same as `#should` except that the condition check is postponed.
# The expectation is checked after the example finishes and all hooks have run.
def should_eventually(matcher, message = nil, *, _file = __FILE__, _line = __LINE__)