@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.
# File lib/rspec/expectations/expectation_target.rb, line 104 def not_to(matcher, message=nil, &block) enforce_block_expectation(matcher) super end
# File lib/rspec/expectations/expectation_target.rb, line 99 def to(matcher, message=nil, &block) enforce_block_expectation(matcher) super end
# File lib/rspec/expectations/expectation_target.rb, line 112 def enforce_block_expectation(matcher) return if supports_block_expectations?(matcher) raise ExpectationNotMetError, "You must pass an argument rather than a block to use the provided " "matcher (#{RSpec::Support::ObjectFormatter.format(matcher)}), or the matcher must implement " "`supports_block_expectations?`." end
# File lib/rspec/expectations/expectation_target.rb, line 120 def supports_block_expectations?(matcher) matcher.supports_block_expectations? rescue NoMethodError false end