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Refactor ExceptionMatcher
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1 changed files with 65 additions and 93 deletions
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@ -1,11 +1,65 @@
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require "./value_matcher"
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require "../test_value"
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require "./failed_match_data"
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require "./matcher"
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require "./successful_match_data"
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module Spectator::Matchers
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module Spectator::Matchers
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# Matcher that tests whether an exception is raised.
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# Matcher that tests whether an exception is raised.
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struct ExceptionMatcher(ExceptionType, ExpectedType) < ValueMatcher(ExpectedType)
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struct ExceptionMatcher(ExceptionType, ExpectedType) < Matcher
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# Determines whether the matcher is satisfied with the value given to it.
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private getter expected
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private def match?(exception)
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exception.is_a?(ExceptionType) && (expected.nil? || expected === exception.message)
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def initialize
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@expected = TestValue.new(nil, ExceptionType.to_s)
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end
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def initialize(@expected : TestValue(ExpectedType))
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end
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def match(actual)
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exception = capture_exception { actual.value }
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case exception
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when Nil
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FailedMatchData.new("#{actual.label} did not raise", expected: ExpectedType.inspect)
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when ExceptionType
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if expected.value.nil? || expected.value === exception.message
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SuccessfulMatchData.new
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else
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FailedMatchData.new("#{actual.label} raised #{ExpectedType}, but the message is not #{expected.label}",
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"expected type": ExceptionType.inspect,
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"actual type": exception.class.inspect,
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"expected message": expected.value.inspect,
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"actual message": exception.message
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)
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end
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else
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FailedMatchData.new("#{actual.label} did not raise #{ExpectedType}",
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expected: ExpectedType.inspect,
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actual: exception.class.inspect
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)
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end
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end
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def negated_match(actual)
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exception = capture_exception { actual.value }
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case exception
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when Nil
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SuccessfulMatchData.new
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when ExceptionType
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if expected.value.nil?
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FailedMatchData.new("#{actual.label} raised #{ExpectedType}")
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elsif expected.value === exception.message
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FailedMatchData.new("#{actual.label} raised #{ExpectedType} with message matching #{expected.label}",
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"expected type": ExceptionType.inspect,
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"actual type": exception.class.inspect,
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"expected message": expected.value.inspect,
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"actual message": exception.message
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)
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else
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SuccessfulMatchData.new
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end
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else
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SuccessfulMatchData.new
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end
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end
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end
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# Runs a block of code and returns the exception it threw.
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# Runs a block of code and returns the exception it threw.
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@ -20,103 +74,21 @@ module Spectator::Matchers
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exception
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exception
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end
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end
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# Determines whether the matcher is satisfied with the partial given to it.
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def match(partial, negated = false)
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exception = capture_exception { partial.actual }
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matched = match?(exception)
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if exception.nil?
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MatchData.new(ExceptionType, matched, ExpectedActual.new(expected, label, exception, partial.label))
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else
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values = ExpectedActual.new(expected, label, exception, partial.label)
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if expected.nil?
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MatchData.new(ExceptionType, matched, values)
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else
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MessageMatchData.new(ExceptionType, matched, values)
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end
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end
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end
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# Creates a new exception matcher with no message check.
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def initialize
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super(nil, ExceptionType.to_s)
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end
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# Creates a new exception matcher with a message check.
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def initialize(expected : ExpectedType, label : String)
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super(expected, label)
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end
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# Creates a new exception matcher with no message check.
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# Creates a new exception matcher with no message check.
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def self.create(exception_type : T.class, label : String) forall T
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def self.create(exception_type : T.class, label : String) forall T
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ExceptionMatcher(T, Nil).new
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ExceptionMatcher(T, Nil).new
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end
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end
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# Creates a new exception matcher with a message check.
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# Creates a new exception matcher with a message check.
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def self.create(expected, label : String)
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def self.create(value, label : String)
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ExceptionMatcher(Exception, typeof(expected)).new(expected, label)
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expected = TestValue.new(value, label)
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ExceptionMatcher(Exception, typeof(value)).new(expected)
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end
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end
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# Creates a new exception matcher with a type and message check.
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# Creates a new exception matcher with a type and message check.
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def self.create(exception_type : T.class, expected, label : String) forall T
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def self.create(exception_type : T.class, value, label : String) forall T
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ExceptionMatcher(T, typeof(expected)).new(expected, label)
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expected = TestValue.new(value, label)
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end
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ExceptionMatcher(T, typeof(value)).new(expected)
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# Match data specific to this matcher.
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private struct MatchData(ExceptionType, ExpectedType, ActualType) < MatchData
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# Creates the match data.
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def initialize(t : ExceptionType.class, matched, @values : ExpectedActual(ExpectedType, ActualType))
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super(matched)
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end
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# Information about the match.
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def named_tuple
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{
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"expected type": NegatableMatchDataValue.new(ExceptionType),
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"actual type": @values.actual.class,
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}
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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
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"#{@values.actual_label} raises #{ExceptionType}"
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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
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"#{@values.actual_label} does not raise #{ExceptionType}"
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end
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end
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# Match data specific to this matcher with an expected message.
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private struct MessageMatchData(ExceptionType, ExpectedType) < ::Spectator::Matchers::MatchData
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# Creates the match data.
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def initialize(t : ExceptionType.class, matched, @values : ExpectedActual(ExpectedType, Exception))
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super(matched)
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end
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# Information about the match.
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def named_tuple
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{
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"expected type": NegatableMatchDataValue.new(ExceptionType),
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"actual type": @values.actual.class,
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"expected message": NegatableMatchDataValue.new(@values.expected),
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"actual message": @values.actual.message,
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}
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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
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"#{@values.actual_label} raises #{ExceptionType} with message #{@values.expected_label}"
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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
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"#{@values.actual_label} does not raise #{ExceptionType} with message #{@values.expected_label}"
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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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end
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end
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