Added script to run clang-tidy on VIXL sources

- Introduced script to run clang-tidy.
- Make clang_format use TestQueue / Test
- Separate test_runner code from TestQueue / Test

Change-Id: If2cffd2c76b0ab552ccf2d9a526fcc737c6e94c2
diff --git a/tools/test_runner.py b/tools/test_runner.py
new file mode 100644
index 0000000..6a7d8b4
--- /dev/null
+++ b/tools/test_runner.py
@@ -0,0 +1,119 @@
+# Copyright 2019, VIXL authors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions and the following disclaimer in the documentation
+#     and/or other materials provided with the distribution.
+#   * Neither the name of ARM Limited nor the names of its contributors may be
+#     used to endorse or promote products derived from this software without
+#     specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import re
+import subprocess
+
+from known_test_failures import FilterKnownTestFailures
+import printer
+import threaded_tests
+from threaded_tests import Test
+import util
+
+# Scan matching tests and return a test manifest.
+def GetTests(runner, filters = []):
+  rc, output = util.getstatusoutput(runner +  ' --list')
+  if rc != 0: util.abort('Failed to list all tests')
+
+  tests = output.split()
+  for f in filters:
+    tests = filter(re.compile(f).search, tests)
+
+  return tests
+
+def RunTest(test):
+  command = test.args['command']
+  p = subprocess.Popen(command,
+                       stdout=subprocess.PIPE,
+                       stderr=subprocess.STDOUT)
+  p_out, p_err = p.communicate()
+  rc = p.poll()
+
+  if rc == 0:
+    skipped = False
+    lines = p_out.split('\n')
+    skipped_id = "SKIPPED: "
+    for i in range(len(lines)):
+      if lines[i].startswith(skipped_id):
+        skipped = True
+        reason = lines[i][len(skipped_id):]
+        with Test.n_tests_skipped.get_lock():
+          Test.n_tests_skipped.value += 1
+          test.shared.tests_skipped.setdefault(reason, 0)
+          test.shared.tests_skipped[reason] += 1
+        break
+    if not skipped:
+      with Test.n_tests_passed.get_lock(): Test.n_tests_passed.value += 1
+  else:
+    with Test.n_tests_failed.get_lock(): Test.n_tests_failed.value += 1
+
+  printer.__print_lock__.acquire()
+
+  printer.UpdateProgress(test.shared.start_time,
+                         Test.n_tests_passed.value,
+                         Test.n_tests_failed.value,
+                         test.shared.n_tests,
+                         Test.n_tests_skipped.value,
+                         test.shared.n_known_failures,
+                         test.name,
+                         prevent_next_overwrite = (rc != 0),
+                         has_lock = True,
+                         prefix = test.shared.progress_prefix)
+
+  if rc != 0:
+    printer.Print('FAILED: ' + test.name, has_lock = True)
+    printer.Print(printer.COLOUR_RED + ' '.join(command) + printer.NO_COLOUR,
+                  has_lock = True)
+    printer.Print(p_out, has_lock = True)
+
+  printer.__print_lock__.release()
+
+class TestQueue(threaded_tests.TestQueue):
+  def __init__(self):
+    super(TestQueue, self).__init__('test_runner: ')
+
+  def AddTests(self, test_runner_command, filters, runtime_options, under_valgrind):
+    tests = GetTests(test_runner_command, filters)
+    n_tests_total = len(tests)
+    tests, skipped  = FilterKnownTestFailures(tests, under_valgrind = under_valgrind)
+    for n_tests, reason in skipped:
+      if n_tests > 0:
+          self.AddKnownFailures(reason, n_tests)
+
+    if len(tests) == 0:
+      printer.Print('No tests to run.')
+      return
+
+    base_command = []
+    if under_valgrind:
+      base_command += ['valgrind']
+    base_command += [test_runner_command]
+    for test in tests:
+      command = base_command + [test] + runtime_options
+      self.AddTest(test, command = command)
+
+  def Run(self, jobs, verbose):
+    return super(TestQueue, self).Run(jobs, verbose, RunTest)