require 'spec_helper' require 'mspec/expectations/expectations' require 'mspec/matchers' class ExpectedException < Exception; end class UnexpectedException < Exception; end describe RaiseExceptionMatcher do it "matches when the proc raises the expected exception" do proc = Proc.new { raise ExpectedException } RaiseErrorMatcher.new(ExpectedException, nil).matches?(proc).should == true end it "executes it's optional block if matched" do run = false proc = Proc.new { raise ExpectedException } matcher = RaiseErrorMatcher.new(ExpectedException, nil) { |error| run = true error.class.should == ExpectedException } matcher.matches?(proc).should == true run.should == true end it "matches when the proc raises the expected exception with the expected message" do proc = Proc.new { raise ExpectedException, "message" } RaiseErrorMatcher.new(ExpectedException, "message").matches?(proc).should == true end it "does not match when the proc does not raise the expected exception" do proc = Proc.new { raise UnexpectedException } RaiseErrorMatcher.new(ExpectedException, nil).matches?(proc).should == false end it "does not match when the proc raises the expected exception with an unexpected message" do proc = Proc.new { raise ExpectedException, "unexpected" } RaiseErrorMatcher.new(ExpectedException, "expected").matches?(proc).should == false end it "does not match when the proc does not raise an exception" do proc = Proc.new {} RaiseErrorMatcher.new(ExpectedException, "expected").matches?(proc).should == false end it "does not match when the raised exception is not an instance of the expected exception" do proc = Proc.new { raise Exception } RaiseErrorMatcher.new(ExpectedException, nil).matches?(proc).should == false end it "provides a useful failure message" do proc = Proc.new { raise UnexpectedException, "unexpected" } matcher = RaiseErrorMatcher.new(ExpectedException, "expected") matcher.matches?(proc) matcher.failure_message.should == ["Expected ExpectedException (expected)", "but got UnexpectedException (unexpected)"] end it "provides a useful failure message when no exception is raised" do proc = Proc.new { 120 } matcher = RaiseErrorMatcher.new(ExpectedException, "expected") matcher.matches?(proc) matcher.failure_message.should == ["Expected ExpectedException (expected)", "but no exception was raised (120 was returned)"] end it "provides a useful negative failure message" do proc = Proc.new { raise ExpectedException, "expected" } matcher = RaiseErrorMatcher.new(ExpectedException, "expected") matcher.matches?(proc) matcher.negative_failure_message.should == ["Expected to not get ExpectedException (expected)", ""] end it "provides a useful negative failure message for strict subclasses of the matched exception class" do proc = Proc.new { raise UnexpectedException, "unexpected" } matcher = RaiseErrorMatcher.new(Exception, nil) matcher.matches?(proc) matcher.negative_failure_message.should == ["Expected to not get Exception", "but got UnexpectedException (unexpected)"] end end