Update LocationExpander to properly handle spaces in filenames.

Also added basic tests.

Change-Id: I5861816bf116486e0ee365debd3dfbda131047f7
PiperOrigin-RevId: 163764257

src/test/java/com/google/devtools/build/lib/analysis/LocationExpanderTest.java

diff --git a/src/test/java/com/google/devtools/build/lib/analysis/LocationExpanderTest.java b/src/test/java/com/google/devtools/build/lib/analysis/LocationExpanderTest.java
new file mode 100644
index 0000000..173c900
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/analysis/LocationExpanderTest.java
@@ -0,0 +1,93 @@
+// 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.lib.analysis;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link LocationExpander}. */
+@RunWith(JUnit4.class)
+public class LocationExpanderTest extends BuildViewTestCase {
+
+  @Before
+  public void createFiles() throws Exception {
+    // Set up a rule to test expansion in.
+    scratch.file("files/fileA");
+    scratch.file("files/fileB");
+
+    scratch.file(
+        "files/BUILD",
+        "filegroup(name='files',",
+        "  srcs = ['fileA', 'fileB'])",
+        "sh_library(name='lib',",
+        "  deps = [':files'])");
+  }
+
+  private LocationExpander makeExpander(String label) throws Exception {
+    ConfiguredTarget target = getConfiguredTarget(label);
+    RuleContext ruleContext = getRuleContext(target);
+    return new LocationExpander(ruleContext);
+  }
+
+  @Test
+  public void location_absolute() throws Exception {
+    LocationExpander expander = makeExpander("//files:files");
+    String input = "foo $(location //files:fileA) bar";
+    String result = expander.expand(input);
+
+    assertThat(result).isEqualTo("foo files/fileA bar");
+  }
+
+  @Test
+  public void locations_spaces() throws Exception {
+    scratch.file("spaces/file with space A");
+    scratch.file("spaces/file with space B");
+    scratch.file(
+        "spaces/BUILD",
+        "filegroup(name='files',",
+        "  srcs = ['file with space A', 'file with space B'])",
+        "sh_library(name='lib',",
+        "  deps = [':files'])");
+
+    LocationExpander expander = makeExpander("//spaces:lib");
+    String input = "foo $(locations :files) bar";
+    String result = expander.expand(input);
+
+    assertThat(result).isEqualTo("foo 'spaces/file with space A' 'spaces/file with space B' bar");
+  }
+
+  @Test
+  public void location_relative() throws Exception {
+    LocationExpander expander = makeExpander("//files:files");
+    String input = "foo $(location :fileA) bar";
+    String result = expander.expand(input);
+
+    assertThat(result).isEqualTo("foo files/fileA bar");
+  }
+
+  @Test
+  public void locations_relative() throws Exception {
+    LocationExpander expander = makeExpander("//files:lib");
+    String input = "foo $(locations :files) bar";
+    String result = expander.expand(input);
+
+    assertThat(result).isEqualTo("foo files/fileA files/fileB bar");
+  }
+}