refactor: change project structure and package name

pkg/drawing/color_test.go

@@ -0,0 +1,53 @@
+package drawing
+
+import (
+	"testing"
+
+	"image/color"
+
+	"github.com/d-Rickyy-b/go-chart-x/v2/testutil"
+)
+
+func TestColorFromHex(t *testing.T) {
+	// replaced new assertions helper
+
+	white := ColorFromHex("FFFFFF")
+	testutil.AssertEqual(t, ColorWhite, white)
+
+	shortWhite := ColorFromHex("FFF")
+	testutil.AssertEqual(t, ColorWhite, shortWhite)
+
+	black := ColorFromHex("000000")
+	testutil.AssertEqual(t, ColorBlack, black)
+
+	shortBlack := ColorFromHex("000")
+	testutil.AssertEqual(t, ColorBlack, shortBlack)
+
+	red := ColorFromHex("FF0000")
+	testutil.AssertEqual(t, ColorRed, red)
+
+	shortRed := ColorFromHex("F00")
+	testutil.AssertEqual(t, ColorRed, shortRed)
+
+	green := ColorFromHex("00FF00")
+	testutil.AssertEqual(t, ColorGreen, green)
+
+	shortGreen := ColorFromHex("0F0")
+	testutil.AssertEqual(t, ColorGreen, shortGreen)
+
+	blue := ColorFromHex("0000FF")
+	testutil.AssertEqual(t, ColorBlue, blue)
+
+	shortBlue := ColorFromHex("00F")
+	testutil.AssertEqual(t, ColorBlue, shortBlue)
+}
+
+func TestColorFromAlphaMixedRGBA(t *testing.T) {
+	// replaced new assertions helper
+
+	black := ColorFromAlphaMixedRGBA(color.Black.RGBA())
+	testutil.AssertTrue(t, black.Equals(ColorBlack), black.String())
+
+	white := ColorFromAlphaMixedRGBA(color.White.RGBA())
+	testutil.AssertTrue(t, white.Equals(ColorWhite), white.String())
+}