Add a test for issue #66

Together with af6d7623, this commit solves issue #66.

Fixes #66.

views_test.go

@@ -20,6 +20,24 @@ func resolveResponseContentTypeSuccess(t *testing.T, expected string, types []st
 	}
 }
 
+func resolveResponseContentTypeError(t *testing.T, expected string, types []string, acceptVal string) {
+	r, err := http.NewRequest("HEAD", "", nil)
+	if err != nil {
+		panic(err)
+	}
+	r.Header.Set("Accept", acceptVal)
+	got, err := resolveResponseContentType(r, types)
+	if err == nil {
+		t.Errorf("expected an error, but got a success: '%v'", got)
+	}
+	if got != "" {
+		t.Errorf("error: return value should be empty, not '%v'", got)
+	}
+	if err.Error() != expected {
+		t.Errorf("wrong error value error: got '%v', want '%v'\n", got, expected)
+	}
+}
+
 func TestResolveResponseContentType(t *testing.T) {
 	resolveResponseContentTypeSuccess(t, "", []string{}, "text/html")
 	resolveResponseContentTypeSuccess(t, "text/html", []string{"text/html"}, "")
@@ -30,4 +48,7 @@ func TestResolveResponseContentType(t *testing.T) {
 
 	// Issue #17
 	resolveResponseContentTypeSuccess(t, "*/*", []string{"*/*"}, "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3")
+
+	// Issue #66
+	resolveResponseContentTypeError(t, "bad media-range ('*')", []string{"text/plain"}, " *")
 }