Move icon generation into dedicated files

icons/ghicons_test.go

@@ -0,0 +1,30 @@
+package icons
+
+import "testing"
+
+func TestHSLtoRGB(t *testing.T) {
+	red := hslToRgba(0, 100, 50)
+	if red.R != 255 || red.G != 0 || red.B != 0 {
+		t.Errorf("Color red not as required")
+	}
+
+	green := hslToRgba(120, 100, 50)
+	if green.R != 0 || green.G != 255 || green.B != 0 {
+		t.Errorf("Color green not as required")
+	}
+
+	blue := hslToRgba(240, 100, 50)
+	if blue.R != 0 || blue.G != 0 || blue.B != 255 {
+		t.Errorf("Color blue not as required")
+	}
+}
+
+func TestShouldCreateNibbles(t *testing.T) {
+	hash := [16]byte{}
+	hash[0] = 0x12
+	nibbles := nibbles(hash)
+
+	if nibbles[0] != 0x01 || nibbles[1] != 02 {
+		t.Errorf("Nibbles not extracted as expected")
+	}
+}