Function TestGetCommonDirectory

core/mount/mount_linux_test.go:623–699

(t *testing.T)

}

func TestGetCommonDirectory(t *testing.T) {
	testCases := []struct {
		name        string
		lowerDirs   []string
		expected    string
		expectError bool
		errorMsg    string
	}{
		{
			name:        "no lowerdirs",
			lowerDirs:   []string{},
			expectError: true,
			errorMsg:    "no common prefix found",
		},
		{
			name: "normal snapshots",
			lowerDirs: []string{
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/37712/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/16590/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/16585/fs",
			},
			expected: "/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots",
		},
		{
			name: "no common prefix at all",
			lowerDirs: []string{
				"/completely/different/path/1",
				"/totally/unrelated/path/2",
			},
			expectError: true,
			errorMsg:    "invalid common directory:",
		},
		{
			name: "single dir",
			lowerDirs: []string{
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/16585/fs",
			},
			expected: "/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/16585",
		},
		{
			name: "snapshots with common prefix in snapshot id",
			lowerDirs: []string{
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/79/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/78/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/77/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/76/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/75/fs",
				"/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/73/fs",
			},
			expected: "/mnt/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			result, err := getCommonDirectory(tc.lowerDirs)

			if tc.expectError {