Add some test cases

config/config_test.go

@@ -0,0 +1,63 @@
+package config
+
+import (
+	"os"
+	"runtime"
+	"testing"
+)
+
+func getUserHomeDir() string {
+	if runtime.GOOS == "windows" {
+		home := os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
+		if home == "" {
+			home = os.Getenv("USERPROFILE")
+		}
+		return home
+	}
+	return os.Getenv("HOME")
+}
+
+func TestExpandPathWithTilde(t *testing.T) {
+	test_path := "~/.config/pet"
+	expectedPath := getUserHomeDir() + "/.config/pet"
+
+	result, err := ExpandPath(test_path)
+
+	if err != nil {
+		t.Errorf("Expected no error, but %v was raised", err)
+	}
+
+	if result != expectedPath {
+		t.Errorf("Expected result to be %s, but got %s", expectedPath, result)
+	}
+}
+
+func TestExpandAbsolutePath(t *testing.T) {
+	test_path := "/var/tmp/"
+	expectedPath := "/var/tmp/"
+
+	result, err := ExpandPath(test_path)
+
+	if err != nil {
+		t.Errorf("Expected no error, but %v was raised", err)
+	}
+
+	if result != expectedPath {
+		t.Errorf("Expected result to be %s, but got %s", expectedPath, result)
+	}
+}
+
+func TestExpandPathWithEmptyInput(t *testing.T) {
+	test_path := ""
+	expectedPath := ""
+
+	result, err := ExpandPath(test_path)
+
+	if err == nil {
+		t.Errorf("Expected error to be raised, but got nil")
+	}
+
+	if result != expectedPath {
+		t.Errorf("Expected result to be empty, but got %s", result)
+	}
+}