require 'spec_helper' describe RSpec::Expectations, "#fail_with with diff" do let(:differ) { double("differ") } before(:each) do RSpec::Expectations.stub(:differ) { differ } end it "calls differ if expected/actual are not strings (or numbers or procs)" do differ.should_receive(:diff_as_object).and_return("diff") lambda { RSpec::Expectations.fail_with "the message", Object.new, Object.new }.should fail_with("the message\nDiff:diff") end context "with two strings" do context "and actual is multiline" do it "calls differ" do differ.should_receive(:diff_as_string).and_return("diff") lambda { RSpec::Expectations.fail_with "the message", "expected\nthis", "actual" }.should fail_with("the message\nDiff:diff") end end context "and expected is multiline" do it "calls differ" do differ.should_receive(:diff_as_string).and_return("diff") lambda { RSpec::Expectations.fail_with "the message", "expected", "actual\nthat" }.should fail_with("the message\nDiff:diff") end end context "and both are single line strings" do it "does not call differ" do differ.should_not_receive(:diff_as_string) lambda { RSpec::Expectations.fail_with("the message", "expected", "actual") }.should fail_with("the message") end end end it "does not call differ if no expected/actual" do lambda { RSpec::Expectations.fail_with "the message" }.should fail_with("the message") end it "does not call differ expected is Numeric" do lambda { RSpec::Expectations.fail_with "the message", 1, "1" }.should fail_with("the message") end it "does not call differ when actual is Numeric" do lambda { RSpec::Expectations.fail_with "the message", "1", 1 }.should fail_with("the message") end it "does not call differ if expected or actual are procs" do lambda { RSpec::Expectations.fail_with "the message", lambda {}, lambda {} }.should fail_with("the message") end end