Support casting types with expect statements

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Michael Miller 2022-12-19 21:29:21 -07:00
parent 7620f58fb8
commit 0f8c46d6ef
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3 changed files with 85 additions and 0 deletions

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@ -114,6 +114,21 @@ module Spectator
report(match_data, message)
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 to(matcher : Matchers::TypeMatcher(U), message = nil) forall U
match_data = matcher.match(@expression)
value = @expression.value
if report(match_data, message)
return value if value.is_a?(U)
raise "Spectator bug: expected value should have cast to #{U}"
else
raise TypeCastError.new("#{@expression.label} is expected to be a #{U}, but was actually #{value.class}")
end
end
# Asserts that a method is not called before the example completes.
@[AlwaysInline]
def to_not(stub : Stub, message = nil) : Nil
@ -136,6 +151,36 @@ module Spectator
report(match_data, message)
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 to_not(matcher : Matchers::TypeMatcher(U), message = nil) forall U
match_data = matcher.negated_match(@expression)
value = @expression.value
if report(match_data, message)
return value unless value.is_a?(U)
raise "Spectator bug: expected value should not be #{U}"
else
raise TypeCastError.new("#{@expression.label} is not expected to be a #{U}, but was actually #{value.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 to_not(matcher : Matchers::NilMatcher, message = nil)
match_data = matcher.negated_match(@expression)
if report(match_data, message)
value = @expression.value
return value unless value.nil?
raise "Spectator bug: expected value should not be nil"
else
raise NilAssertionError.new("#{@expression.label} is not expected to be nil.")
end
end
# :ditto:
@[AlwaysInline]
def not_to(matcher, message = nil) : Nil