mediaview: Recognize more MIME types.

chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/files/file_path.h"
 #include "chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h"
 #include "storage/browser/fileapi/file_system_url.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
@@ skipping 181 matching lines @@
 TEST(ArcDocumentsProviderUtilTest, BuildDocumentUrl) {
   EXPECT_EQ("content://authority/document/document_id",
             BuildDocumentUrl("authority", "document_id").spec());
   EXPECT_EQ("content://a%20b/document/a%20b",
             BuildDocumentUrl("a b", "a b").spec());
   EXPECT_EQ("content://a%2Fb/document/a%2Fb",
             BuildDocumentUrl("a/b", "a/b").spec());
   EXPECT_EQ("content://../document/..", BuildDocumentUrl("..", "..").spec());
 }
 
+TEST(ArcDocumentsProviderUtilTest, GetExtensionsForArcMimeType) {
+  // MIME types already known to Chromium.
+  EXPECT_NE(0u, GetExtensionsForArcMimeType("audio/mp3").size());
+  EXPECT_NE(0u, GetExtensionsForArcMimeType("image/jpeg").size());
+  EXPECT_NE(0u, GetExtensionsForArcMimeType("text/html").size());
+  EXPECT_NE(
+      0u, GetExtensionsForArcMimeType("application/x-chrome-extension").size());
+
+  // MIME types known to Android only.
+  EXPECT_NE(0u,
+            GetExtensionsForArcMimeType("application/x-android-drm-fl").size());
+  EXPECT_NE(0u, GetExtensionsForArcMimeType("audio/x-wav").size());
+
+  // Unknown types.
+  EXPECT_EQ(0u, GetExtensionsForArcMimeType("abc/xyz").size());
+  EXPECT_EQ(
+      0u, GetExtensionsForArcMimeType("vnd.android.document/directory").size());
+
+  // Specially handled types.
+  EXPECT_EQ(0u, GetExtensionsForArcMimeType("application/octet-stream").size());
+}
+
 }  // namespace
 
 }  // namespace arc