Add test for kpm_env_test.go file (#596)

Signed-off-by: Rohanraj123 <[email protected]>

pkg/api/kpm_env_test.go

@@ -0,0 +1,42 @@
+package api
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"gotest.tools/v3/assert"
+)
+
+// TestGetKclPkgPath tests the retrieval of KCL_PKG_PATH
+func TestGetKclPkgPath(t *testing.T) {
+	// Backup original environment variable
+	originalKclPkgPath, isSet := os.LookupEnv("KCL_PKG_PATH")
+	if isSet {
+		defer os.Setenv("KCL_PKG_PATH", originalKclPkgPath) // Restore after test
+	} else {
+		defer os.Unsetenv("KCL_PKG_PATH")
+	}
+
+	// Case 1: When KCL_PKG_PATH is set
+	customPath := filepath.Join(os.TempDir(), "custom_kcl_path")
+	err := os.Setenv("KCL_PKG_PATH", customPath)
+	assert.Equal(t, err, nil)
+
+	path, err := GetKclPkgPath()
+	assert.Equal(t, err, nil)
+	assert.Equal(t, path, customPath)
+	fmt.Printf("Test Case 1: Expected %v, Got %v\n", customPath, path)
+
+	// Case 2: When KCL_PKG_PATH is not set (should return default path)
+	os.Unsetenv("KCL_PKG_PATH")
+	homeDir, err := os.UserHomeDir()
+	assert.Equal(t, err, nil)
+	expectedDefaultPath := filepath.Join(homeDir, ".kcl", "kpm")
+
+	path, err = GetKclPkgPath()
+	assert.Equal(t, err, nil)
+	assert.Equal(t, path, expectedDefaultPath)
+	fmt.Printf("Test Case 2: Expected %v, Got %v\n", expectedDefaultPath, path)
+}