SERVER-19005 Support DEATH_TEST and DEATH_TEST_F

1 files changed, 109 insertions, 0 deletions

diff --git a/src/mongo/unittest/death_test.h b/src/mongo/unittest/death_test.h
new file mode 100644
index 00000000000..5aff0c39cd4
--- /dev/null
+++ b/src/mongo/unittest/death_test.h
@@ -0,0 +1,109 @@
+/**
+ *    Copyright (C) 2015 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include "mongo/base/disallow_copying.h"
+#include "mongo/stdx/memory.h"
+#include "mongo/unittest/unittest.h"
+
+/**
+ * Constructs a single death test named "TEST_NAME" within the test case "CASE_NAME".
+ *
+ * The test only succeeds if the process terminates abnormally, e.g. through an fassert
+ * failure or deadly signal.
+ *
+ * Death tests are incompatible with already-running threads. If you need multiple threads
+ * in your death test, start them in the test body, or use DEATH_TEST_F and start them
+ * in the setUp() method of the fixture.
+ */
+#define DEATH_TEST(CASE_NAME, TEST_NAME, MATCH_EXPR)                    \
+    class _TEST_TYPE_NAME(CASE_NAME, TEST_NAME) : public ::mongo::unittest::Test { \
+    private:                                                            \
+        virtual void _doTest();                                         \
+                                                                        \
+        static const RegistrationAgent<::mongo::unittest::DeathTest<    \
+                _TEST_TYPE_NAME(CASE_NAME, TEST_NAME)>> _agent;         \
+    };                                                                  \
+    const ::mongo::unittest::Test::RegistrationAgent<                   \
+                ::mongo::unittest::DeathTest<_TEST_TYPE_NAME(CASE_NAME, TEST_NAME)>> \
+    _TEST_TYPE_NAME(CASE_NAME, TEST_NAME)::_agent(#CASE_NAME, #TEST_NAME); \
+    std::string getDeathTestPattern(_TEST_TYPE_NAME(CASE_NAME, TEST_NAME)*) { return MATCH_EXPR; } \
+    void _TEST_TYPE_NAME(CASE_NAME, TEST_NAME)::_doTest()
+
+/**
+ * Constructs a single test named TEST_NAME that has access to a common fixture
+ * named "FIXTURE_NAME".
+ *
+ * See description of DEATH_TEST for more details on death tests.
+ */
+#define DEATH_TEST_F(FIXTURE_NAME, TEST_NAME, MATCH_EXPR)                    \
+        class _TEST_TYPE_NAME(FIXTURE_NAME, TEST_NAME) : public FIXTURE_NAME { \
+        private:                                                        \
+            virtual void _doTest();                                     \
+                                                                        \
+            static const RegistrationAgent<::mongo::unittest::DeathTest< \
+                    _TEST_TYPE_NAME(FIXTURE_NAME, TEST_NAME)>> _agent; \
+        };                                                              \
+        const ::mongo::unittest::Test::RegistrationAgent<               \
+                ::mongo::unittest::DeathTest<_TEST_TYPE_NAME(FIXTURE_NAME, TEST_NAME)>> \
+            _TEST_TYPE_NAME(FIXTURE_NAME, TEST_NAME)::_agent(#FIXTURE_NAME, #TEST_NAME); \
+        std::string getDeathTestPattern(_TEST_TYPE_NAME(FIXTURE_NAME, TEST_NAME)*) { \
+            return MATCH_EXPR;                                          \
+        }                                                               \
+        void _TEST_TYPE_NAME(FIXTURE_NAME, TEST_NAME)::_doTest()
+
+namespace mongo {
+namespace unittest {
+
+class DeathTestImpl : public Test {
+    MONGO_DISALLOW_COPYING(DeathTestImpl);
+protected:
+    DeathTestImpl(std::unique_ptr<Test> test);
+
+private:
+    void _doTest() override;
+    virtual std::string getPattern() = 0;
+    std::unique_ptr<Test> _test;
+};
+
+template <typename T>
+class DeathTest : public DeathTestImpl {
+public:
+    static const std::string pattern;
+
+    DeathTest() : DeathTestImpl(stdx::make_unique<T>()) {}
+private:
+    std::string getPattern() override { return getDeathTestPattern(static_cast<T*>(nullptr)); }
+};
+
+}  // namespace unittest
+}  // namespace mongo