Немного реструктуризации

Добавлен роут для смены скина

lib/tools/tools_test.go

@@ -0,0 +1,22 @@
+package tools_test
+
+import (
+	"testing"
+	. "elyby/minecraft-skinsystem/lib/tools"
+)
+
+func TestParseUsername(t *testing.T) {
+	if ParseUsername("test.png") != "test" {
+		t.Error("Function should trim .png at end")
+	}
+
+	if ParseUsername("test") != "test" {
+		t.Error("Function should return string itself, if it not contains .png at end")
+	}
+}
+
+func TestBuildKey(t *testing.T) {
+	if BuildKey("Test") != "username:test" {
+		t.Error("Function shound convert string to lover case and concatenate it with usernmae:")
+	}
+}