test: Add hex color test

Signed-off-by: AlexNg <contact@ngjx.org>

cmd/utils/types/color_test.go

@@ -0,0 +1,38 @@
+package types_test
+
+import (
+	"testing"
+
+	"github.com/caffeine-addictt/template/cmd/utils/types"
+)
+
+func TestHexColors(t *testing.T) {
+	tt := []struct {
+		in     string
+		rule   string
+		errors bool
+	}{
+		{"#d", "hex too short", true},
+		{"#ddd", "hex valid", false},
+		{"#ffffff", "hex valid", false},
+		{"#fff", "hex valid", false},
+		{"#fffaaas", "hex too long", true},
+		{"#ff", "hex too short", true},
+		{"#ae24d2", "hex valid", false},
+		{"sdwa2fw", "invalid letters", true},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.in, func(t *testing.T) {
+			c := types.HexColor(tc.in)
+
+			err := c.UnmarshalJSON([]byte("\"" + tc.in + "\""))
+			if err != nil && !tc.errors {
+				t.Errorf("%v. expected to error but got %s: %v", tc.rule, c, err)
+			}
+			if err == nil && tc.errors {
+				t.Errorf("%v. expected to not error but got %s: %v", tc.rule, c, err)
+			}
+		})
+	}
+}