HaveExactElement should not call FailureMessage if a submatcher returned an error

Fixes #668

Author: onsi

matchers/have_exact_elements.go

@@ -44,7 +44,12 @@ func (matcher *HaveExactElementsMatcher) Match(actual interface{}) (success bool
 
 		elemMatcher := matchers[i].(omegaMatcher)
 		match, err := elemMatcher.Match(values[i])
-		if err != nil || !match {
+		if err != nil {
+			matcher.mismatchFailures = append(matcher.mismatchFailures, mismatchFailure{
+				index:   i,
+				failure: err.Error(),
+			})
+		} else if !match {
 			matcher.mismatchFailures = append(matcher.mismatchFailures, mismatchFailure{
 				index:   i,
 				failure: elemMatcher.FailureMessage(values[i]),

matchers/have_exact_elements_test.go

@@ -58,6 +58,14 @@ var _ = Describe("HaveExactElements", func() {
 				Expect([]string{"foo", "bar", "baz"}).ShouldNot(HaveExactElements(BeFalse(), "bar", "baz"))
 				Expect([]interface{}{"foo", "bar", false}).Should(HaveExactElements(ContainSubstring("foo"), "bar", BeFalse()))
 			})
+
+			It("should include the error message, not the failure message", func() {
+				failures := InterceptGomegaFailures(func() {
+					Expect([]string{"foo", "bar", "baz"}).Should(HaveExactElements("foo", BeFalse(), "bar"))
+				})
+				Ω(failures[0]).ShouldNot(ContainSubstring("to be false"))
+				Ω(failures[0]).Should(ContainSubstring("1: Expected a boolean.  Got:\n    <string>: bar"))
+			})
 		})
 	})