Windows, Android BusyBox: create JunctionCreator

Introduce the JunctionCreator classes that the
Android BusyBox can use to work around path length
limitations on Windows.

See https://github.com/bazelbuild/bazel/issues/3264

Change-Id: Ia5ee39f0635dcc2690ffb1755dc56d21e7bc7536
PiperOrigin-RevId: 161378422

1 files changed, 49 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/android/junctions/NoopJunctionCreatorTest.java b/src/test/java/com/google/devtools/build/android/junctions/NoopJunctionCreatorTest.java
new file mode 100644
index 0000000000..a99d568e8f
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/android/junctions/NoopJunctionCreatorTest.java
@@ -0,0 +1,49 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// 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 com.google.devtools.build.android.junctions;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Tests for NoopJunctionCreator. */
+@RunWith(JUnit4.class)
+public class NoopJunctionCreatorTest {
+  private Path tmproot = null;
+
+  @Before
+  public void acquireTmpRoot() {
+    String tmpEnv = System.getenv("TEST_TMPDIR");
+    assertThat(tmpEnv).isNotNull();
+    tmproot = FileSystems.getDefault().getPath(tmpEnv);
+    // Cast Path to Object to disambiguate which assertThat-overload to use.
+    assertThat((Object) tmproot).isNotNull();
+  }
+
+  @Test
+  public void testNoopJunctionCreator() throws Exception {
+    JunctionCreator jc = new NoopJunctionCreator();
+    // Cast Path to Object to disambiguate which assertThat-overload to use.
+    assertThat((Object) jc.create(null)).isNull();
+
+    Path p = tmproot.resolve("foo");
+    // Cast Path to Object to disambiguate which assertThat-overload to use.
+    assertThat((Object) jc.create(p)).isSameAs(p);
+  }
+}