[Support] Add a GTest matcher for Optional<T>

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61071

llvm-svn: 359174

2 files changed, 26 insertions, 0 deletions

diff --git a/llvm/unittests/Support/CMakeLists.txt b/llvm/unittests/Support/CMakeLists.txt
index 70fc40d883a..fd839bc90b4 100644
--- a/llvm/unittests/Support/CMakeLists.txt
+++ b/llvm/unittests/Support/CMakeLists.txt
@@ -39,6 +39,7 @@ add_llvm_unittest(SupportTests
   LEB128Test.cpp
   LineIteratorTest.cpp
   LockFileManagerTest.cpp
+  MatchersTest.cpp
   MD5Test.cpp
   ManagedStatic.cpp
   MathExtrasTest.cpp
diff --git a/llvm/unittests/Support/MatchersTest.cpp b/llvm/unittests/Support/MatchersTest.cpp
new file mode 100644
index 00000000000..3248686fba9
--- /dev/null
+++ b/llvm/unittests/Support/MatchersTest.cpp
@@ -0,0 +1,25 @@
+//===----- unittests/MatchersTest.cpp -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/Optional.h"
+#include "llvm/Testing/Support/SupportHelpers.h"
+#include "gmock/gmock-matchers.h"
+
+using ::testing::_;
+using ::testing::AllOf;
+using ::testing::Gt;
+using ::testing::Lt;
+using ::testing::Not;
+
+namespace {
+TEST(MatchersTest, Optional) {
+  EXPECT_THAT(llvm::Optional<int>(llvm::None), Not(llvm::ValueIs(_)));
+  EXPECT_THAT(llvm::Optional<int>(10), llvm::ValueIs(10));
+  EXPECT_THAT(llvm::Optional<int>(10), llvm::ValueIs(AllOf(Lt(11), Gt(9))));
+}
+} // namespace