struct Spectator::Matchers::ChangeMatcher(ExpressionType)

Overview

Matcher that tests whether an expression changed.

Defined in:

spectator/matchers/change_matcher.cr

Constructors

Instance Method Summary

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

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

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

new new

Instance methods inherited from class Object

should(matcher, message = nil) should, should_eventually(matcher, message = nil) should_eventually, should_never(matcher, message = nil) should_never, should_not(matcher, message = nil) should_not

Constructor Detail

def self.new(expression : Block(ExpressionType)) #

Creates a new change matcher.


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Instance Method Detail

def by(amount) #

Specifies that t he resulting value must be some amount different.


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def by_at_least(minimum) #

Specifies that the resulting value must be at least some amount different.


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def by_at_most(maximum) #

Specifies that the resulting value must be at most some amount different.


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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 from(value) #

Specifies what the initial value of the expression must be.


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

Actually performs the test against the expression.


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def negated_match(actual : Expression(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) #

Specifies what the resulting value of the expression must be.


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