Add a test for issue #66

Together with af6d7623, this commit solves issue #66.

Fixes #66.

views.go

@@ -219,7 +219,7 @@ func resolveResponseContentType(r *http.Request, types []string) (string, error)
 	if len(types) == 0 {
 		return "", nil
 	}
-	acceptHeader := r.Header.Get("Accept")
+	acceptHeader := strings.TrimSpace(r.Header.Get("Accept"))
 	if acceptHeader == "" {
 		return types[0], nil
 	}
@@ -237,7 +237,7 @@ func resolveResponseContentType(r *http.Request, types []string) (string, error)
 		choiceParts := strings.Split(avString, ";")
 		mediaRange := acceptHeaderMediaRangeRegex.FindStringSubmatch(choiceParts[0])
 		if mediaRange == nil {
-			return "", fmt.Errorf("bad media-range (\"%v\")", choiceParts[0])
+			return "", fmt.Errorf("bad media-range ('%v')", choiceParts[0])
 		}
 		av.Type = mediaRange[1]
 		av.Subtype = mediaRange[2]
@@ -262,7 +262,7 @@ func resolveResponseContentType(r *http.Request, types []string) (string, error)
 			// Check if this parameter is still invalid in any case
 			acceptParams := acceptHeaderAcceptParamsRegex.FindStringSubmatchIndex(choiceParts[0])
 			if acceptParams == nil {
-				return "", fmt.Errorf("bad accept-params (\"%v\")", choiceParts[0])
+				return "", fmt.Errorf("bad accept-params ('%v')", choiceParts[0])
 			}
 		}
 		avs[i] = av

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"}, " *")
 }