1 files changed, 73 insertions, 0 deletions
diff --git a/llvm/unittests/CAS/ActionCacheTest.cpp b/llvm/unittests/CAS/ActionCacheTest.cpp
new file mode 100644
index 0000000..a74a3e9
--- /dev/null
+++ b/llvm/unittests/CAS/ActionCacheTest.cpp
@@ -0,0 +1,73 @@
+//===- ActionCacheTest.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/CAS/ActionCache.h"
+#include "CASTestConfig.h"
+#include "llvm/CAS/ObjectStore.h"
+#include "llvm/Testing/Support/Error.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace llvm::cas;
+
+TEST_P(CASTest, ActionCacheHit) {
+  std::shared_ptr<ObjectStore> CAS = createObjectStore();
+  std::unique_ptr<ActionCache> Cache = createActionCache();
+
+  std::optional<ObjectProxy> ID;
+  ASSERT_THAT_ERROR(CAS->createProxy(std::nullopt, "1").moveInto(ID),
+                    Succeeded());
+  std::optional<CASID> ResultID;
+  ASSERT_THAT_ERROR(Cache->put(*ID, *ID), Succeeded());
+  ASSERT_THAT_ERROR(Cache->get(*ID).moveInto(ResultID), Succeeded());
+  ASSERT_TRUE(ResultID);
+  std::optional<ObjectRef> Result = CAS->getReference(*ResultID);
+  ASSERT_TRUE(Result);
+  ASSERT_EQ(*ID, *Result);
+}
+
+TEST_P(CASTest, ActionCacheMiss) {
+  std::shared_ptr<ObjectStore> CAS = createObjectStore();
+  std::unique_ptr<ActionCache> Cache = createActionCache();
+
+  std::optional<ObjectProxy> ID1, ID2;
+  ASSERT_THAT_ERROR(CAS->createProxy(std::nullopt, "1").moveInto(ID1),
+                    Succeeded());
+  ASSERT_THAT_ERROR(CAS->createProxy(std::nullopt, "2").moveInto(ID2),
+                    Succeeded());
+  ASSERT_THAT_ERROR(Cache->put(*ID1, *ID2), Succeeded());
+  // This is a cache miss for looking up a key doesn't exist.
+  std::optional<CASID> Result1;
+  ASSERT_THAT_ERROR(Cache->get(*ID2).moveInto(Result1), Succeeded());
+  ASSERT_FALSE(Result1);
+
+  ASSERT_THAT_ERROR(Cache->put(*ID2, *ID1), Succeeded());
+  // Cache hit after adding the value.
+  std::optional<CASID> Result2;
+  ASSERT_THAT_ERROR(Cache->get(*ID2).moveInto(Result2), Succeeded());
+  ASSERT_TRUE(Result2);
+  std::optional<ObjectRef> Ref = CAS->getReference(*Result2);
+  ASSERT_TRUE(Ref);
+  ASSERT_EQ(*ID1, *Ref);
+}
+
+TEST_P(CASTest, ActionCacheRewrite) {
+  std::shared_ptr<ObjectStore> CAS = createObjectStore();
+  std::unique_ptr<ActionCache> Cache = createActionCache();
+
+  std::optional<ObjectProxy> ID1, ID2;
+  ASSERT_THAT_ERROR(CAS->createProxy(std::nullopt, "1").moveInto(ID1),
+                    Succeeded());
+  ASSERT_THAT_ERROR(CAS->createProxy(std::nullopt, "2").moveInto(ID2),
+                    Succeeded());
+  ASSERT_THAT_ERROR(Cache->put(*ID1, *ID1), Succeeded());
+  // Writing to the same key with different value is error.
+  ASSERT_THAT_ERROR(Cache->put(*ID1, *ID2), Failed());
+  // Writing the same value multiple times to the same key is fine.
+  ASSERT_THAT_ERROR(Cache->put(*ID1, *ID1), Succeeded());
+}