Improve some gtest assertions

As requested during review, compare pointers to NULL explicitly to make what's
going on more clear.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@202090 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Basic/VirtualFileSystemTest.cpp

@@ -281,7 +281,7 @@ TEST_F(VFSFromYAMLTest, MappedFiles) {
                         "]\n"
                         "}",
                         Lower);
-  ASSERT_TRUE(FS.getPtr());
+  ASSERT_TRUE(FS.getPtr() != NULL);
 
   IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
       new vfs::OverlayFileSystem(Lower));
@@ -325,7 +325,7 @@ TEST_F(VFSFromYAMLTest, CaseInsensitive) {
                         "              ]\n"
                         "}]}",
                         Lower);
-  ASSERT_TRUE(FS.getPtr());
+  ASSERT_TRUE(FS.getPtr() != NULL);
 
   IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
       new vfs::OverlayFileSystem(Lower));
@@ -361,7 +361,7 @@ TEST_F(VFSFromYAMLTest, CaseSensitive) {
                         "              ]\n"
                         "}]}",
                         Lower);
-  ASSERT_TRUE(FS.getPtr());
+  ASSERT_TRUE(FS.getPtr() != NULL);
 
   IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
       new vfs::OverlayFileSystem(Lower));
@@ -381,88 +381,88 @@ TEST_F(VFSFromYAMLTest, IllegalVFSFile) {
 
   // invalid YAML at top-level
   IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString("{]", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   // invalid YAML in roots
   FS = getFromYAMLString("{ 'roots':[}", Lower);
   // invalid YAML in directory
   FS = getFromYAMLString(
       "{ 'roots':[ { 'name': 'foo', 'type': 'directory', 'contents': [}",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // invalid configuration
   FS = getFromYAMLString("{ 'knobular': 'true', 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString("{ 'case-sensitive': 'maybe', 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // invalid roots
   FS = getFromYAMLString("{ 'roots':'' }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString("{ 'roots':{} }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // invalid entries
   FS = getFromYAMLString(
       "{ 'roots':[ { 'type': 'other', 'name': 'me', 'contents': '' }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString("{ 'roots':[ { 'type': 'file', 'name': [], "
                          "'external-contents': 'other' }",
                          Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'roots':[ { 'type': 'file', 'name': 'me', 'external-contents': [] }",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'roots':[ { 'type': 'file', 'name': 'me', 'external-contents': {} }",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'roots':[ { 'type': 'directory', 'name': 'me', 'contents': {} }",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'roots':[ { 'type': 'directory', 'name': 'me', 'contents': '' }",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'roots':[ { 'thingy': 'directory', 'name': 'me', 'contents': [] }",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // missing mandatory fields
   FS = getFromYAMLString("{ 'roots':[ { 'type': 'file', 'name': 'me' }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'roots':[ { 'type': 'file', 'external-contents': 'other' }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString("{ 'roots':[ { 'name': 'me', 'contents': [] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // duplicate keys
   FS = getFromYAMLString("{ 'roots':[], 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLString(
       "{ 'case-sensitive':'true', 'case-sensitive':'true', 'roots':[] }",
       Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS =
       getFromYAMLString("{ 'roots':[{'name':'me', 'name':'you', 'type':'file', "
                         "'external-contents':'blah' } ] }",
                         Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // missing version
   FS = getFromYAMLRawString("{ 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
 
   // bad version number
   FS = getFromYAMLRawString("{ 'version':'foo', 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLRawString("{ 'version':-1, 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   FS = getFromYAMLRawString("{ 'version':100000, 'roots':[] }", Lower);
-  EXPECT_FALSE(FS.getPtr());
+  EXPECT_EQ(NULL, FS.getPtr());
   EXPECT_EQ(24, NumDiagnostics);
 }