Add tests.

diff --git a/tests/multithreading/task_result_01.cc b/tests/multithreading/task_result_01.cc
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+++ b/tests/multithreading/task_result_01.cc
@@ -0,0 +1,43 @@
+// ------------------------------------------------------------------------
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+// Copyright (C) 2009 - 2020 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// Part of the source code is dual licensed under Apache-2.0 WITH
+// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
+// governing the source code and code contributions can be found in
+// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
+//
+// ------------------------------------------------------------------------
+
+
+// A test for basic functionality of the TaskResult function
+
+#include <deal.II/base/task_result.h>
+
+#include "../tests.h"
+
+
+
+int
+main()
+{
+  initlog();
+
+  // Create a background task that sleeps for a while and then
+  // issues its result. Associate this background task with
+  // a TaskResult object.
+  Threads::TaskResult<int> t = Threads::new_task([]() {
+    std::this_thread::sleep_for(std::chrono::seconds(1));
+    return 42;
+  });
+
+  // Wait for that background task to finish, then get its
+  // value:
+  deallog << t.value() << std::endl;
+
+  // Ensure that we can continue to ask for the return value:
+  deallog << t.value() << std::endl;
+}

diff --git a/tests/multithreading/task_result_01.output b/tests/multithreading/task_result_01.output
new file mode 100644 (file)
index 0000000..85ecae6
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+++ b/tests/multithreading/task_result_01.output
@@ -0,0 +1,3 @@
+
+DEAL::42
+DEAL::42

diff --git a/tests/multithreading/task_result_02.cc b/tests/multithreading/task_result_02.cc
new file mode 100644 (file)
index 0000000..f3e7ed7
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+++ b/tests/multithreading/task_result_02.cc
@@ -0,0 +1,47 @@
+// ------------------------------------------------------------------------
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+// Copyright (C) 2009 - 2020 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// Part of the source code is dual licensed under Apache-2.0 WITH
+// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
+// governing the source code and code contributions can be found in
+// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
+//
+// ------------------------------------------------------------------------
+
+
+// A test for basic functionality of the TaskResult function. This
+// test checks the move constructor.
+
+#include <deal.II/base/task_result.h>
+
+#include "../tests.h"
+
+
+
+int
+main()
+{
+  initlog();
+
+  // Create a background task that sleeps for a while and then
+  // issues its result. Associate this background task with
+  // a TaskResult object.
+  Threads::TaskResult<int> t = Threads::new_task([]() {
+    std::this_thread::sleep_for(std::chrono::seconds(1));
+    return 42;
+  });
+
+  // Move the task
+  Threads::TaskResult<int> tt = std::move(t);
+
+  // Wait for that background task to finish, then get its
+  // value:
+  deallog << tt.value() << std::endl;
+
+  // Ensure that we can continue to ask for the return value:
+  deallog << tt.value() << std::endl;
+}

diff --git a/tests/multithreading/task_result_02.output b/tests/multithreading/task_result_02.output
new file mode 100644 (file)
index 0000000..85ecae6
--- /dev/null
+++ b/tests/multithreading/task_result_02.output
@@ -0,0 +1,3 @@
+
+DEAL::42
+DEAL::42