From 998ae3d5dec3dce3dad5f588baeb070dbc1704de Mon Sep 17 00:00:00 2001
From: JP Martin <jpmartin@google.com>
Date: Fri, 9 Dec 2016 15:05:12 -0800
Subject: [PATCH] Add a PathMatcher for CloudStorageFileSystem

Add a test, as well.
We reuse the default PathMatcher since it does a fine job of globbing files.
---
 .../contrib/nio/CloudStorageFileSystem.java   |  7 ++-----
 .../nio/CloudStorageFileSystemTest.java       | 21 +++++++++++++++++++
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/google-cloud-contrib/google-cloud-nio/src/main/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystem.java b/google-cloud-contrib/google-cloud-nio/src/main/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystem.java
index 60a39fb5a817..4f031c92f740 100644
--- a/google-cloud-contrib/google-cloud-nio/src/main/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystem.java
+++ b/google-cloud-contrib/google-cloud-nio/src/main/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystem.java
@@ -27,6 +27,7 @@
 import java.net.URISyntaxException;
 import java.nio.file.FileStore;
 import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
 import java.nio.file.Path;
 import java.nio.file.PathMatcher;
 import java.nio.file.WatchService;
@@ -210,13 +211,9 @@ public Set<String> supportedFileAttributeViews() {
     return SUPPORTED_VIEWS;
   }
 
-  /**
-   * Throws {@link UnsupportedOperationException} because this feature hasn't been implemented yet.
-   */
   @Override
   public PathMatcher getPathMatcher(String syntaxAndPattern) {
-    // TODO(#813): Implement me.
-    throw new UnsupportedOperationException();
+    return FileSystems.getDefault().getPathMatcher(syntaxAndPattern);
   }
 
   /**
diff --git a/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemTest.java b/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemTest.java
index ec856447b96a..4d1dc866fa85 100644
--- a/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemTest.java
+++ b/google-cloud-contrib/google-cloud-nio/src/test/java/com/google/cloud/storage/contrib/nio/CloudStorageFileSystemTest.java
@@ -17,9 +17,11 @@
 package com.google.cloud.storage.contrib.nio;
 
 import static com.google.common.truth.Truth.assertThat;
+import static com.google.common.truth.Truth.assertWithMessage;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 import com.google.cloud.storage.StorageOptions;
+import com.google.common.collect.ImmutableList;
 import com.google.common.testing.EqualsTester;
 import com.google.common.testing.NullPointerTester;
 
@@ -34,6 +36,7 @@
 import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.PathMatcher;
 import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
@@ -159,4 +162,22 @@ public void testListFiles() throws IOException {
       assertThat(got).containsExactlyElementsIn(goodPaths);
     }
   }
+
+  @Test
+  public void testMatcher() throws IOException {
+    try (FileSystem fs = CloudStorageFileSystem.forBucket("bucket")) {
+      List<String> paths = ImmutableList.of("a.java", "a.text", "folder/c.java", "d");
+      String pattern1 = "glob:*.java";
+      PathMatcher matcher1 = fs.getPathMatcher(pattern1);
+      List<Boolean> matches1 = ImmutableList.of(true, false, true, false);
+      String pattern2 = "glob:*.{java,text}";
+      PathMatcher matcher2 = fs.getPathMatcher(pattern2);
+      List<Boolean> matches2 = ImmutableList.of(true, true, true, false);
+      for (int i=0; i<paths.size(); i++) {
+        Path input = fs.getPath(paths.get(i)).getFileName();
+        assertWithMessage(pattern1 + " on " + paths.get(i)).that(matcher1.matches(input)).isEqualTo(matches1.get(i));
+        assertWithMessage(pattern2 + " on " + paths.get(i)).that(matcher2.matches(input)).isEqualTo(matches2.get(i));
+      }
+    }
+  }
 }