[VFS] Extend virtual working directory test

Extend the virtual working directory test with a few edge cases that are
not currently tested.

diff --git a/llvm/unittests/Support/VirtualFileSystemTest.cpp b/llvm/unittests/Support/VirtualFileSystemTest.cpp
index 69e9ce8..87547b2 100644 (file)
--- a/llvm/unittests/Support/VirtualFileSystemTest.cpp
+++ b/llvm/unittests/Support/VirtualFileSystemTest.cpp
@@ -2089,6 +2089,16 @@ TEST_F(VFSFromYAMLTest, WorkingDirectoryFallthrough) {
       "                  'external-contents': '//root/foo/a'\n"
       "                }\n"
       "              ]\n"
+      "},\n"
+      "{\n"
+      "  'type': 'directory',\n"
+      "  'name': '//root/bar/baz',\n"
+      "  'contents': [ {\n"
+      "                  'type': 'file',\n"
+      "                  'name': 'a',\n"
+      "                  'external-contents': '//root/foo/a'\n"
+      "                }\n"
+      "              ]\n"
       "}\n"
       "]\n"
       "}",
@@ -2125,6 +2135,21 @@ TEST_F(VFSFromYAMLTest, WorkingDirectoryFallthrough) {
   Status = FS->status("c");
   ASSERT_FALSE(Status.getError());
   EXPECT_TRUE(Status->exists());
+
+  Status = FS->status("./bar/baz/a");
+  ASSERT_FALSE(Status.getError());
+  EXPECT_TRUE(Status->exists());
+
+  EC = FS->setCurrentWorkingDirectory("//root/bar");
+  ASSERT_FALSE(EC);
+
+  Status = FS->status("./baz/a");
+  ASSERT_FALSE(Status.getError());
+  EXPECT_TRUE(Status->exists());
+
+  Status = FS->status("../bar/baz/a");
+  ASSERT_FALSE(Status.getError());
+  EXPECT_TRUE(Status->exists());
 }
 
 TEST_F(VFSFromYAMLTest, WorkingDirectoryFallthroughInvalid) {