1 files changed, 58 insertions, 0 deletions
diff --git a/pkg/fspath/builder_test.go b/pkg/fspath/builder_test.go
new file mode 100644
index 000000000..22f890273
--- /dev/null
+++ b/pkg/fspath/builder_test.go
@@ -0,0 +1,58 @@
+// Copyright 2019 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fspath
+
+import (
+	"testing"
+)
+
+func TestBuilder(t *testing.T) {
+	type testCase struct {
+		pcs   []string // path components in reverse order
+		after string
+		want  string
+	}
+	tests := []testCase{
+		{
+			// Empty case.
+		},
+		{
+			pcs:  []string{"foo"},
+			want: "foo",
+		},
+		{
+			pcs:  []string{"foo", "bar", "baz"},
+			want: "baz/bar/foo",
+		},
+		{
+			pcs:   []string{"foo", "bar"},
+			after: " (deleted)",
+			want:  "bar/foo (deleted)",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.want, func(t *testing.T) {
+			var b Builder
+			for _, pc := range test.pcs {
+				b.PrependComponent(pc)
+			}
+			b.AppendString(test.after)
+			if got := b.String(); got != test.want {
+				t.Errorf("got %q, wanted %q", got, test.want)
+			}
+		})
+	}
+}