1 files changed, 18 insertions, 0 deletions
diff --git a/gnu/llvm/unittests/Support/RegexTest.cpp b/gnu/llvm/unittests/Support/RegexTest.cpp
index c045c49bc3d..5e3ce39f005 100644
--- a/gnu/llvm/unittests/Support/RegexTest.cpp
+++ b/gnu/llvm/unittests/Support/RegexTest.cpp
@@ -151,6 +151,24 @@ TEST_F(RegexTest, MoveAssign) {
   Regex r2("abc");
   r2 = std::move(r1);
   EXPECT_TRUE(r2.match("916"));
+  std::string Error;
+  EXPECT_FALSE(r1.isValid(Error));
+}
+
+TEST_F(RegexTest, NoArgConstructor) {
+  std::string Error;
+  Regex r1;
+  EXPECT_FALSE(r1.isValid(Error));
+  EXPECT_EQ("invalid regular expression", Error);
+  r1 = Regex("abc");
+  EXPECT_TRUE(r1.isValid(Error));
+}
+
+TEST_F(RegexTest, MatchInvalid) {
+  Regex r1;
+  std::string Error;
+  EXPECT_FALSE(r1.isValid(Error));
+  EXPECT_FALSE(r1.match("X"));
 }
 
 }