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require 'spec_helper'
require 'mspec/expectations/expectations'
require 'mspec/matchers'
describe RespondToMatcher do
it "matches when actual does respond_to? expected" do
RespondToMatcher.new(:to_s).matches?(Object.new).should == true
RespondToMatcher.new(:inject).matches?([]).should == true
RespondToMatcher.new(:[]).matches?(1).should == true
RespondToMatcher.new(:[]=).matches?("string").should == true
end
it "does not match when actual does not respond_to? expected" do
RespondToMatcher.new(:to_i).matches?(Object.new).should == false
RespondToMatcher.new(:inject).matches?(1).should == false
RespondToMatcher.new(:non_existent_method).matches?([]).should == false
RespondToMatcher.new(:[]=).matches?(1).should == false
end
it "provides a useful failure message" do
matcher = RespondToMatcher.new(:non_existent_method)
matcher.matches?('string')
matcher.failure_message.should == [
"Expected \"string\" (String)", "to respond to non_existent_method"]
end
it "provides a useful negative failure message" do
matcher = RespondToMatcher.new(:to_i)
matcher.matches?(4.0)
matcher.negative_failure_message.should == [
"Expected 4.0 (Float)", "not to respond to to_i"]
end
end
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