1 files changed, 120 insertions, 0 deletions
diff --git a/staging_vespalib/src/tests/sequencedtaskexecutor/foregroundtaskexecutor_test.cpp b/staging_vespalib/src/tests/sequencedtaskexecutor/foregroundtaskexecutor_test.cpp
new file mode 100644
index 00000000000..a2671bb81a7
--- /dev/null
+++ b/staging_vespalib/src/tests/sequencedtaskexecutor/foregroundtaskexecutor_test.cpp
@@ -0,0 +1,120 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/vespalib/util/foregroundtaskexecutor.h>
+#include <vespa/vespalib/testkit/testapp.h>
+
+#include <condition_variable>
+#include <unistd.h>
+
+#include <vespa/log/log.h>
+LOG_SETUP("foregroundtaskexecutor_test");
+
+namespace vespalib {
+
+
+class Fixture
+{
+public:
+    ForegroundTaskExecutor _threads;
+
+    Fixture()
+        : _threads()
+    {
+    }
+};
+
+
+class TestObj
+{
+public:
+    std::mutex _m;
+    std::condition_variable _cv;
+    int _done;
+    int _fail;
+    int _val;
+
+    TestObj()
+        : _m(),
+          _cv(),
+          _done(0),
+          _fail(0),
+          _val(0)
+    {
+    }
+
+    void
+    modify(int oldValue, int newValue)
+    {
+        {
+            std::lock_guard<std::mutex> guard(_m);
+            if (_val == oldValue) {
+                _val = newValue;
+            } else {
+                ++_fail;
+            }
+            ++_done;
+        }
+        _cv.notify_all();
+    }
+
+    void
+    wait(int wantDone)
+    {
+        std::unique_lock<std::mutex> guard(_m);
+        _cv.wait(guard, [=] { return this->_done >= wantDone; });
+    }
+};
+
+TEST_F("testExecute", Fixture) {
+    std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
+    EXPECT_EQUAL(0, tv->_val);
+    f._threads.execute(1, [=]() { tv->modify(0, 42); });
+    tv->wait(1);
+    EXPECT_EQUAL(0,  tv->_fail);
+    EXPECT_EQUAL(42, tv->_val);
+    f._threads.sync();
+    EXPECT_EQUAL(0,  tv->_fail);
+    EXPECT_EQUAL(42, tv->_val);
+}
+
+
+TEST_F("require that task with same id are serialized", Fixture)
+{
+    std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
+    EXPECT_EQUAL(0, tv->_val);
+    f._threads.execute(0, [=]() { usleep(2000); tv->modify(0, 14); });
+    f._threads.execute(0, [=]() { tv->modify(14, 42); });
+    tv->wait(2);
+    EXPECT_EQUAL(0,  tv->_fail);
+    EXPECT_EQUAL(42, tv->_val);
+    f._threads.sync();
+    EXPECT_EQUAL(0,  tv->_fail);
+    EXPECT_EQUAL(42, tv->_val);
+}
+
+TEST_F("require that task with different ids are serialized", Fixture)
+{
+    int tryCnt = 0;
+    for (tryCnt = 0; tryCnt < 100; ++tryCnt) {
+        std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
+        EXPECT_EQUAL(0, tv->_val);
+        f._threads.execute(0, [=]() { usleep(2000); tv->modify(0, 14); });
+        f._threads.execute(1, [=]() { tv->modify(14, 42); });
+        tv->wait(2);
+        if (tv->_fail != 1) {
+             continue;
+        }
+        EXPECT_EQUAL(1,  tv->_fail);
+        EXPECT_EQUAL(14, tv->_val);
+        f._threads.sync();
+        EXPECT_EQUAL(1,  tv->_fail);
+        EXPECT_EQUAL(14, tv->_val);
+        break;
+    }
+    EXPECT_TRUE(tryCnt >= 100);
+}
+
+
+}
+
+TEST_MAIN() { TEST_RUN_ALL(); }