test cleanup

codabar/encoder_test.go

@@ -11,19 +11,22 @@ func Test_Encode(t *testing.T) {
 		t.Error("\"FOOBAR\" should not be encodable")
 	}
 
-	code, err := Encode("A40156B")
+	testEncode := func(txt, testResult string) {
+		code, err := Encode(txt)
 		if err != nil || code == nil {
 			t.Fail()
 		} else {
-		testResult := "10110010010101101001010101001101010110010110101001010010101101010010011"
 			if code.Bounds().Max.X != len(testResult) {
-			t.Error("length missmatch")
+				t.Errorf("%v: length missmatch", txt)
 			} else {
 				for i, r := range testResult {
 					if (code.At(i, 0) == color.Black) != (r == '1') {
-					t.Errorf("code missmatch on position %d", i)
+						t.Errorf("%v: code missmatch on position %d", txt, i)
 					}
 				}
 			}
 		}
+	}
+
+	testEncode("A40156B", "10110010010101101001010101001101010110010110101001010010101101010010011")
 }