Move all tests to single directory "tests"

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>

tests/integration/test_utils.py

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0
+
+import os
+import subprocess
+import time
+
+
+class RunSubprocessMixin:
+    def is_debug_enabled(self):
+        return "TESTS_DEBUG" in os.environ
+
+    def run_subprocess(self, args):
+        begin = time.time()
+        if self.is_debug_enabled():
+            print("TEST_CALL", args)
+        proc = subprocess.Popen(
+            args,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+        )
+        out, err = proc.communicate()
+        if self.is_debug_enabled():
+            print("TEST_CALL completed", time.time() - begin)
+            print("STDOUT:", out.decode('utf-8'))
+            print("STDERR:", err.decode('utf-8'))
+        return out, err, proc.returncode
+
+    def run_subprocess_assert_returncode(self, args, expected_returncode=0):
+        out, err, returncode = self.run_subprocess(args)
+        decoded_out = out.decode('utf-8')
+        decoded_err = err.decode('utf-8')
+        self.assertEqual(
+            returncode,
+            expected_returncode,
+            f"Invalid return code of process {returncode} != {expected_returncode}\n"
+            f"stdout: {decoded_out}\nstderr: {decoded_err}\n",
+        )
+        return out, err