tests: Move unit tests into a separate directory

The main tests directory still looks very crowded, and it's not
clear which files are part of a unit tests and which belong to
a different test subsystem. Let's clean up the mess and move the
unit tests to a separate directory.

Message-Id: <20210310063314.1049838-1-thuth@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/unit/io-channel-helpers.h

@@ -0,0 +1,41 @@
+/*
+ * QEMU I/O channel test helpers
+ *
+ * Copyright (c) 2015 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TEST_IO_CHANNEL_HELPERS_H
+#define TEST_IO_CHANNEL_HELPERS_H
+
+#include "io/channel.h"
+
+typedef struct QIOChannelTest QIOChannelTest;
+
+QIOChannelTest *qio_channel_test_new(void);
+
+void qio_channel_test_run_threads(QIOChannelTest *test,
+                                  bool blocking,
+                                  QIOChannel *src,
+                                  QIOChannel *dst);
+
+void qio_channel_test_run_writer(QIOChannelTest *test,
+                                 QIOChannel *src);
+void qio_channel_test_run_reader(QIOChannelTest *test,
+                                 QIOChannel *dst);
+
+void qio_channel_test_validate(QIOChannelTest *test);
+
+#endif /* TEST_IO_CHANNEL_HELPERS_H */