[clang-tools-extra] [clangd] Remove clangd's HasValue GMock matcher (PR #121309)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 created https://github.com/llvm/llvm-project/pull/121309

An equivalent matcher under the name Optional has since been added upstream to GMock.

Fixes https://github.com/llvm/llvm-project/issues/121308

>From 112d20354add8679fc62e66de4428c947b295e96 Mon Sep 17 00:00:00 2001
From: Nathan Ridge <zeratul976 at hotmail.com>
Date: Sun, 29 Dec 2024 02:25:10 -0500
Subject: [PATCH] [clangd] Remove clangd's HasValue GMock matcher

An equivalent matcher under the name Optional has since been added
upstream to GMock.

Fixes https://github.com/llvm/llvm-project/issues/121308
---
 clang-tools-extra/clangd/unittests/Matchers.h | 68 -------------------
 .../clangd/unittests/TypeHierarchyTests.cpp   | 11 +--
 2 files changed, 6 insertions(+), 73 deletions(-)

diff --git a/clang-tools-extra/clangd/unittests/Matchers.h b/clang-tools-extra/clangd/unittests/Matchers.h
index 0fbd93b2e68825..17d18dd9b85b65 100644
--- a/clang-tools-extra/clangd/unittests/Matchers.h
+++ b/clang-tools-extra/clangd/unittests/Matchers.h
@@ -127,74 +127,6 @@ PolySubsequenceMatcher<Args...> HasSubsequence(Args &&... M) {
     llvm::consumeError(ComputedValue.takeError());                             \
   } while (false)
 
-// Implements the HasValue(m) matcher for matching an Optional whose
-// value matches matcher m.
-template <typename InnerMatcher> class OptionalMatcher {
-public:
-  explicit OptionalMatcher(const InnerMatcher &matcher) : matcher_(matcher) {}
-  OptionalMatcher(const OptionalMatcher&) = default;
-  OptionalMatcher &operator=(const OptionalMatcher&) = delete;
-
-  // This type conversion operator template allows Optional(m) to be
-  // used as a matcher for any Optional type whose value type is
-  // compatible with the inner matcher.
-  //
-  // The reason we do this instead of relying on
-  // MakePolymorphicMatcher() is that the latter is not flexible
-  // enough for implementing the DescribeTo() method of Optional().
-  template <typename Optional> operator Matcher<Optional>() const {
-    return MakeMatcher(new Impl<Optional>(matcher_));
-  }
-
-private:
-  // The monomorphic implementation that works for a particular optional type.
-  template <typename Optional>
-  class Impl : public ::testing::MatcherInterface<Optional> {
-  public:
-    using Value = typename std::remove_const<
-        typename std::remove_reference<Optional>::type>::type::value_type;
-
-    explicit Impl(const InnerMatcher &matcher)
-        : matcher_(::testing::MatcherCast<const Value &>(matcher)) {}
-
-    Impl(const Impl&) = default;
-    Impl &operator=(const Impl&) = delete;
-
-    virtual void DescribeTo(::std::ostream *os) const {
-      *os << "has a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    virtual void DescribeNegationTo(::std::ostream *os) const {
-      *os << "does not have a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    virtual bool
-    MatchAndExplain(Optional optional,
-                    ::testing::MatchResultListener *listener) const {
-      if (!optional)
-        return false;
-
-      *listener << "which has a value ";
-      return MatchPrintAndExplain(*optional, matcher_, listener);
-    }
-
-  private:
-    const Matcher<const Value &> matcher_;
-  };
-
-  const InnerMatcher matcher_;
-};
-
-// Creates a matcher that matches an Optional that has a value
-// that matches inner_matcher.
-template <typename InnerMatcher>
-inline OptionalMatcher<InnerMatcher>
-HasValue(const InnerMatcher &inner_matcher) {
-  return OptionalMatcher<InnerMatcher>(inner_matcher);
-}
-
 } // namespace clangd
 } // namespace clang
 #endif
diff --git a/clang-tools-extra/clangd/unittests/TypeHierarchyTests.cpp b/clang-tools-extra/clangd/unittests/TypeHierarchyTests.cpp
index 15158d8a45ca8b..406a842f5a0081 100644
--- a/clang-tools-extra/clangd/unittests/TypeHierarchyTests.cpp
+++ b/clang-tools-extra/clangd/unittests/TypeHierarchyTests.cpp
@@ -28,6 +28,7 @@ using ::testing::ElementsAre;
 using ::testing::Field;
 using ::testing::IsEmpty;
 using ::testing::Matcher;
+using ::testing::Optional;
 using ::testing::SizeIs;
 using ::testing::UnorderedElementsAre;
 
@@ -38,12 +39,12 @@ MATCHER_P(selectionRangeIs, R, "") { return arg.selectionRange == R; }
 template <class... ParentMatchers>
 ::testing::Matcher<TypeHierarchyItem> parents(ParentMatchers... ParentsM) {
   return Field(&TypeHierarchyItem::parents,
-               HasValue(UnorderedElementsAre(ParentsM...)));
+               Optional(UnorderedElementsAre(ParentsM...)));
 }
 template <class... ChildMatchers>
 ::testing::Matcher<TypeHierarchyItem> children(ChildMatchers... ChildrenM) {
   return Field(&TypeHierarchyItem::children,
-               HasValue(UnorderedElementsAre(ChildrenM...)));
+               Optional(UnorderedElementsAre(ChildrenM...)));
 }
 // Note: "not resolved" is different from "resolved but empty"!
 MATCHER(parentsNotResolved, "") { return !arg.parents; }
@@ -790,7 +791,7 @@ struct Child : Parent1, Parent2 {};
       Children,
       UnorderedElementsAre(
           AllOf(withName("Child"),
-                withResolveParents(HasValue(UnorderedElementsAre(withResolveID(
+                withResolveParents(Optional(UnorderedElementsAre(withResolveID(
                     getSymbolID(&findDecl(AST, "Parent1")).str())))))));
 }
 
@@ -810,9 +811,9 @@ struct Chil^d : Parent {};
   ASSERT_THAT(Result, SizeIs(1));
   auto Parents = superTypes(Result.front(), Index.get());
 
-  EXPECT_THAT(Parents, HasValue(UnorderedElementsAre(
+  EXPECT_THAT(Parents, Optional(UnorderedElementsAre(
                            AllOf(withName("Parent"),
-                                 withResolveParents(HasValue(IsEmpty()))))));
+                                 withResolveParents(Optional(IsEmpty()))))));
 }
 } // namespace
 } // namespace clangd