struct Spectator::Matchers::ChangeFromMatcher(ExpressionType, FromType)

Overview

Matcher that tests whether an expression changed from a specific value.

Defined in:

spectator/matchers/change_from_matcher.cr

Constructors

Instance Method Summary

Instance methods inherited from struct Spectator::Matchers::Matcher

description : String description, initialize initialize, match(actual : TestExpression(T)) : MatchData forall T match, negated_match(actual : TestExpression(T)) : MatchData forall T negated_match

Constructor methods inherited from struct Spectator::Matchers::Matcher

new new

Instance methods inherited from class Object

should(matcher : Spectator::Matchers::Matcher) should, should_not(matcher : Spectator::Matchers::Matcher) should_not

Constructor Detail

def self.new(expression : TestBlock(ExpressionType), expected : FromType) #

Creates a new change matcher.


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Instance Method Detail

def by(amount : T) forall T #

Specifies what the resulting value of the expression should change by.


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def description : String #

Short text about the matcher's purpose. This explains what condition satisfies the matcher. The description is used when the one-liner syntax is used.


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def match(actual : TestExpression(T)) : MatchData forall T #

Actually performs the test against the expression.


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def negated_match(actual : TestExpression(T)) : MatchData forall T #

Performs the test against the expression, but inverted. A successful match with #match should normally fail for this method, and vice-versa.


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def to(value : T) forall T #

Specifies what the resulting value of the expression must be.


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