complete testCase when file/dir existed.

Signed-off-by: zwwhdls <zwwhdls@hotmail.com>

cmd/helm/pull_test.go

@@ -21,6 +21,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"strings"
 	"testing"
 
 	"helm.sh/helm/v3/pkg/repo/repotest"
@@ -41,7 +42,10 @@ func TestPullCmd(t *testing.T) {
 	tests := []struct {
 		name         string
 		args         string
+		existFile    string
+		existDir     string
 		wantError    bool
+		wantErrorMsg string
 		failExpect   string
 		expectFile   string
 		expectDir    bool
@@ -87,14 +91,26 @@ func TestPullCmd(t *testing.T) {
 			expectFile: "./signtest",
 			expectDir:  true,
 		},
+		{
+			name:         "Fetch untar when file with same name existed",
+			args:         "test/test1 --untar --untardir test1",
+			existFile:    "test1",
+			wantError:    true,
+			wantErrorMsg: "failed to untar",
+		},
+		{
+			name:         "Fetch untar when dir with same name existed",
+			args:         "test/test2 --untar --untardir test2",
+			existDir:     "test2",
+			wantError:    true,
+			wantErrorMsg: "failed to untar",
+		},
 		{
 			name:         "Fetch, verify, untar",
-			args:         "test/signtest --verify --keyring=testdata/helm-test-key.pub --untar --untardir signtest",
-			expectFile:   "./signtest",
+			args:         "test/signtest --verify --keyring=testdata/helm-test-key.pub --untar --untardir signtest2",
+			expectFile:   "./signtest2",
 			expectDir:    true,
 			expectVerify: true,
-			failExpect:   "Failed to untar signtest",
-			wantError:    true,
 		},
 		{
 			name:       "Chart fetch using repo URL",
@@ -129,9 +145,27 @@ func TestPullCmd(t *testing.T) {
 				filepath.Join(outdir, "repositories.yaml"),
 				outdir,
 			)
+			// Create file or Dir before helm pull --untar, see: https://github.com/helm/helm/issues/7182
+			if tt.existFile != "" {
+				file := filepath.Join(outdir, tt.existFile)
+				_, err := os.Create(file)
+				if err != nil {
+					t.Fatal("err")
+				}
+			}
+			if tt.existDir != "" {
+				file := filepath.Join(outdir, tt.existDir)
+				err := os.Mkdir(file, 0755)
+				if err != nil {
+					t.Fatal(err)
+				}
+			}
 			_, out, err := executeActionCommand(cmd)
 			if err != nil {
 				if tt.wantError {
+					if tt.wantErrorMsg != "" && strings.Contains(tt.wantErrorMsg, err.Error()) {
+						t.Fatalf("%q reported error not equel wantErr, reported: %s, wanted: %s", tt.name, err, tt.wantErrorMsg)
+					}
 					return
 				}
 				t.Fatalf("%q reported error: %s", tt.name, err)