From 53d8af8e96b65c283e88f7efbab69fc2ad96eb71 Mon Sep 17 00:00:00 2001
From: John Bytheway <jbytheway@gmail.com>
Date: Mon, 13 Apr 2020 08:37:23 -0400
Subject: [PATCH] Test for --min-duration

---
 projects/CMakeLists.txt                       |  1 +
 projects/SelfTest/TimingTests/Sleep.tests.cpp | 23 +++++++++++
 projects/TestScripts/testTimeThreshold.py     | 41 +++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 projects/SelfTest/TimingTests/Sleep.tests.cpp
 create mode 100644 projects/TestScripts/testTimeThreshold.py

diff --git a/projects/CMakeLists.txt b/projects/CMakeLists.txt
index 1e50e9cc..cde25cbd 100644
--- a/projects/CMakeLists.txt
+++ b/projects/CMakeLists.txt
@@ -27,6 +27,7 @@ set(TEST_SOURCES
         ${SELF_TEST_DIR}/IntrospectiveTests/StringManip.tests.cpp
         ${SELF_TEST_DIR}/IntrospectiveTests/Xml.tests.cpp
         ${SELF_TEST_DIR}/IntrospectiveTests/ToString.tests.cpp
+        ${SELF_TEST_DIR}/TimingTests/Sleep.tests.cpp
         ${SELF_TEST_DIR}/UsageTests/Approx.tests.cpp
         ${SELF_TEST_DIR}/UsageTests/BDD.tests.cpp
         ${SELF_TEST_DIR}/UsageTests/Benchmark.tests.cpp
diff --git a/projects/SelfTest/TimingTests/Sleep.tests.cpp b/projects/SelfTest/TimingTests/Sleep.tests.cpp
new file mode 100644
index 00000000..5b939874
--- /dev/null
+++ b/projects/SelfTest/TimingTests/Sleep.tests.cpp
@@ -0,0 +1,23 @@
+/*
+ *  Copyright 2011 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+#include "catch.hpp"
+
+#include <chrono>
+#include <thread>
+
+TEST_CASE( "sleep_for_100ms", "[.min_duration_test][approvals]" )
+{
+  std::this_thread::sleep_for( std::chrono::milliseconds( 100 ) );
+  CHECK( true );
+}
+
+TEST_CASE( "sleep_for_200ms", "[.min_duration_test][approvals]" )
+{
+  std::this_thread::sleep_for( std::chrono::milliseconds( 200 ) );
+  CHECK( true );
+}
diff --git a/projects/TestScripts/testTimeThreshold.py b/projects/TestScripts/testTimeThreshold.py
new file mode 100644
index 00000000..51804aae
--- /dev/null
+++ b/projects/TestScripts/testTimeThreshold.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+
+import subprocess
+import sys
+
+def run_tests_with_threshold(self_test_exe, threshold):
+    cmd = [self_test_exe, '--min-duration', str(threshold),
+            '[min_duration_test]']
+    process = subprocess.Popen(
+            cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    stdout, stderr = process.communicate()
+    if stderr:
+        raise RuntimeError("Unexpected error output:\n" +
+                stderr.decode())
+    if process.returncode != 0:
+        raise RuntimeError("Unexpected failure to run tests\n")
+    result = stdout.split(b'\n')
+    report_lines = [s.split() for s in result if b' s: ' in s]
+    tests_reported = [l[2] for l in report_lines]
+    times_reported = [float(l[0]) for l in report_lines]
+    return tests_reported, times_reported
+
+def check_times_at_least(times_reported, minimum):
+    for time in times_reported:
+        assert time >= minimum, (
+                'Time {} was less that requested minimum {}' .format(
+                    time, minimum))
+
+def main():
+    self_test_exe, = sys.argv[1:]
+    tests, times = run_tests_with_threshold(self_test_exe, '0.15')
+    assert tests == [b'sleep_for_200ms'], (
+            "Unexpected tests reported %s" % tests)
+    check_times_at_least(times, 0.15)
+    tests,times = run_tests_with_threshold(self_test_exe, '0')
+    assert tests == [b'sleep_for_100ms', b'sleep_for_200ms'], (
+            "Unexpected tests reported %s" % tests)
+    check_times_at_least(times, 0)
+
+if __name__ == '__main__':
+    sys.exit(main())