class RSpec::Expectations::BlockExpectationTarget
@private Validates the provided matcher to ensure it supports block expectations, in order to avoid user confusion when they use a block thinking the expectation will be on the return value of the block rather than the block itself.
Public Instance Methods
not_to(matcher, message=nil, &block)
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Calls superclass method
RSpec::Expectations::ExpectationTarget::InstanceMethods#not_to
# File lib/rspec/expectations/expectation_target.rb, line 142 def not_to(matcher, message=nil, &block) enforce_block_expectation(matcher) super end
Also aliased as: to_not
to(matcher, message=nil, &block)
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Calls superclass method
RSpec::Expectations::ExpectationTarget::InstanceMethods#to
# File lib/rspec/expectations/expectation_target.rb, line 137 def to(matcher, message=nil, &block) enforce_block_expectation(matcher) super end
Private Instance Methods
enforce_block_expectation(matcher)
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# File lib/rspec/expectations/expectation_target.rb, line 150 def enforce_block_expectation(matcher) return if supports_block_expectations?(matcher) raise ExpectationNotMetError, "You must pass an argument rather than a block to `expect` to use the provided " \ "matcher (#{RSpec::Support::ObjectFormatter.format(matcher)}), or the matcher must implement " \ "`supports_block_expectations?`." end
supports_block_expectations?(matcher)
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# File lib/rspec/expectations/expectation_target.rb, line 158 def supports_block_expectations?(matcher) matcher.respond_to?(:supports_block_expectations?) && matcher.supports_block_expectations? end