struct

Spectator::Matchers::ChangeToMatcher(ExpressionType, ToType)

Inherits Spectator::Matchers::Matcher / Struct / Value / Object

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

Constructors

new(expression : Block(ExpressionType), expected : ToType)

Creates a new change matcher.

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Instance methods

by(amount)

Specifies how much the initial value should change by.

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description

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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from(value)

Specifies what the initial value of the expression must be.

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

Actually performs the test against the expression.

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negated_match(actual : Expression(T)) : MatchData forall T

Negated matching for this matcher is not supported. Attempting to call this method will result in a compilation error.

This syntax has a logical problem. "The action does not change the expression to some value." Is it a failure if the value is not changed, but it is the expected value?

RSpec doesn't support this syntax either.

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