Add basic range matcher

This commit is contained in:
Michael Miller 2019-01-25 13:00:19 -07:00
parent 154832e5c4
commit bc45a3bf41

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require "./value_matcher"
module Spectator::Matchers
# Matcher that tests whether a value is in a given range or set of values.
# The `#includes?` method is used for this check.
# Typically this matcher uses a `Range`,
# but any type that implements the `#includes?` method is supported.
struct RangeMatcher(ExpectedType) < ValueMatcher(ExpectedType)
# Determines whether the matcher is satisfied with the value given to it.
# True is returned if the match was successful, false otherwise.
def match?(partial : Expectations::ValueExpectationPartial(ActualType)) : Bool forall ActualType
@expected.includes?(partial.actual)
end
# Describes the condition that satisfies the matcher.
# This is informational and displayed to the end-user.
def message(partial : Expectations::ValueExpectationPartial(ActualType)) : String forall ActualType
"Expected #{partial.label} to be in #{label}"
end
# Describes the condition that won't satsify the matcher.
# This is informational and displayed to the end-user.
def negated_message(partial : Expectations::ValueExpectationPartial(ActualType)) : String forall ActualType
"Expected #{partial.label} to not be in #{label}"
end
end
end