r201635 - Add an OverlayFileSystem class

[Dmitri Gribenko]

On Wed, Feb 19, 2014 at 3:29 AM, Ben Langmuir <blangmuir at apple.com> wrote:
> +TEST(VirtualFileSystemTest, overlay_dirs) {
> +  IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
> +  IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
> +  IntrusiveRefCntPtr<vfs::OverlayFileSystem>
> +    O(new vfs::OverlayFileSystem(Lower));
> +  O->pushOverlay(Upper);
> +
> +  ErrorOr<vfs::Status> Status1((error_code())), Status2((error_code())),
> +                       Status3((error_code()));
> +
> +  Lower->addDirectory("/lower-only");
> +  Lower->addDirectory("/both");
> +  Upper->addDirectory("/both");
> +  Upper->addDirectory("/upper-only");
> +
> +  // non-merged paths should be the same
> +  ASSERT_TRUE(Status1 = Lower->status("/lower-only"));
> +  ASSERT_TRUE(Status2 = O->status("/lower-only"));
> +  EXPECT_TRUE(Status1->equivalent(*Status2));
> +
> +  ASSERT_TRUE(Status1 = Lower->status("/lower-only"));
> +  ASSERT_TRUE(Status2 = O->status("/lower-only"));
> +  EXPECT_TRUE(Status1->equivalent(*Status2));
> +}

What was the purpose of "/both" and Status3 in this test?

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/