Implement hasParent()-matcher.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166421 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ASTMatchers/ASTMatchersTest.cpp b/unittests/ASTMatchers/ASTMatchersTest.cpp
index 9676fde..5c97f3a 100644
--- a/unittests/ASTMatchers/ASTMatchersTest.cpp
+++ b/unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -2884,6 +2884,18 @@
               hasAncestor(recordDecl(hasName("A")))))))));
 }
 
+TEST(HasParent, MatchesOnlyParent) {
+  EXPECT_TRUE(matches(
+      "void f() { if (true) { int x = 42; } }",
+      compoundStmt(hasParent(ifStmt()))));
+  EXPECT_TRUE(notMatches(
+      "void f() { for (;;) { int x = 42; } }",
+      compoundStmt(hasParent(ifStmt()))));
+  EXPECT_TRUE(notMatches(
+      "void f() { if (true) for (;;) { int x = 42; } }",
+      compoundStmt(hasParent(ifStmt()))));
+}
+
 TEST(TypeMatching, MatchesTypes) {
   EXPECT_TRUE(matches("struct S {};", qualType().bind("loc")));
 }