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Improve rcl timer test coverage. #680

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merged 7 commits into from
Jun 19, 2020
Merged

Improve rcl timer test coverage. #680

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6bc2557
Improve rcl timer test coverage.
hidmic Jun 12, 2020
dc69a75
Fix flaky waits on Windows.
hidmic Jun 12, 2020
b19b6f0
Address peer review comments.
hidmic Jun 15, 2020
fd44afb
Please linter.
hidmic Jun 16, 2020
4041bae
Cover a few more lines using a faulty clock.
hidmic Jun 16, 2020
d2bd754
Skip rcl timer tests for rmw_connext_cpp.
hidmic Jun 16, 2020
6aa785e
Drop unnecessary rcl_reset_error() calls.
hidmic Jun 19, 2020
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20 changes: 13 additions & 7 deletions rcl/test/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,19 @@ function(test_target_function)
AMENT_DEPENDENCIES ${rmw_implementation}
)

set(timer_test_timeout 60)
if(rmw_implementation STREQUAL "rmw_connext_cpp")
set(timer_test_timeout 90) # Bump timeout for RTI Connext
endif()
rcl_add_custom_gtest(test_timer${target_suffix}
SRCS rcl/test_timer.cpp
ENV ${rmw_implementation_env_var}
TIMEOUT ${timer_test_timeout}
APPEND_LIBRARY_DIRS ${extra_lib_dirs}
LIBRARIES ${PROJECT_NAME} osrf_testing_tools_cpp::memory_tools
AMENT_DEPENDENCIES ${rmw_implementation}
)

rcl_add_custom_gtest(test_context${target_suffix}
SRCS rcl/test_context.cpp
ENV ${rmw_implementation_env_var} ${memory_tools_ld_preload_env_var}
Expand Down Expand Up @@ -350,13 +363,6 @@ rcl_add_custom_gtest(test_expand_topic_name
LIBRARIES ${PROJECT_NAME}
)

rcl_add_custom_gtest(test_timer${target_suffix}
SRCS rcl/test_timer.cpp
APPEND_LIBRARY_DIRS ${extra_lib_dirs}
LIBRARIES ${PROJECT_NAME}
AMENT_DEPENDENCIES "osrf_testing_tools_cpp"
)

rcl_add_custom_gtest(test_security
SRCS rcl/test_security.cpp
APPEND_LIBRARY_DIRS ${extra_lib_dirs}
Expand Down
110 changes: 109 additions & 1 deletion rcl/test/rcl/test_timer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -183,7 +183,7 @@ TEST_F(TestTimerFixture, test_two_timers_ready_before_timeout) {
rcl_timer_t timer2 = rcl_get_zero_initialized_timer();

ret = rcl_timer_init(
&timer, &clock, this->context_ptr, RCL_MS_TO_NS(50), nullptr, rcl_get_default_allocator());
&timer, &clock, this->context_ptr, RCL_MS_TO_NS(10), nullptr, rcl_get_default_allocator());
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If this is an important change, can you add a comment so it's clearer why this value was chosen?

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Dropped a comment in b19b6f0.

ASSERT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;

ret = rcl_timer_init(
Expand Down Expand Up @@ -274,6 +274,104 @@ TEST_F(TestTimerFixture, test_timer_not_ready) {
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
}

TEST_F(TestTimerFixture, test_timer_overrun) {
rcl_clock_t clock;
rcl_allocator_t allocator = rcl_get_default_allocator();
rcl_ret_t ret = rcl_clock_init(RCL_STEADY_TIME, &clock, &allocator);
ASSERT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
OSRF_TESTING_TOOLS_CPP_SCOPE_EXIT(
{
rcl_ret_t ret = rcl_clock_fini(&clock);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
rcl_reset_error();
});

rcl_timer_t timer = rcl_get_zero_initialized_timer();
ret = rcl_timer_init(
&timer, &clock, this->context_ptr, RCL_MS_TO_NS(200), nullptr, rcl_get_default_allocator());
ASSERT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
OSRF_TESTING_TOOLS_CPP_SCOPE_EXIT(
{
rcl_ret_t ret = rcl_timer_fini(&timer);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
rcl_reset_error();
});

rcl_wait_set_t wait_set = rcl_get_zero_initialized_wait_set();
ret = rcl_wait_set_init(&wait_set, 0, 0, 1, 0, 0, 0, context_ptr, rcl_get_default_allocator());
ASSERT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
OSRF_TESTING_TOOLS_CPP_SCOPE_EXIT(
{
rcl_ret_t ret = rcl_wait_set_fini(&wait_set);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
rcl_reset_error();
});

// Force multiple timer timeouts.
ret = rcl_wait(&wait_set, RCL_MS_TO_NS(500));
EXPECT_EQ(RCL_RET_TIMEOUT, ret) << rcl_get_error_string().str;
rcl_reset_error();

bool is_ready = false;
ret = rcl_timer_is_ready(&timer, &is_ready);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
EXPECT_TRUE(is_ready);
rcl_reset_error();
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EXPECT_EQ(RCL_RET_OK, rcl_timer_call(&timer)) << rcl_get_error_string().str;
rcl_reset_error();

ret = rcl_wait_set_add_timer(&wait_set, &timer, NULL);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
rcl_reset_error();

// Ensure period is re-aligned.
ret = rcl_wait(&wait_set, RCL_MS_TO_NS(10));
EXPECT_EQ(RCL_RET_TIMEOUT, ret) << rcl_get_error_string().str;
rcl_reset_error();

ret = rcl_timer_is_ready(&timer, &is_ready);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
EXPECT_FALSE(is_ready);
rcl_reset_error();
}

TEST_F(TestTimerFixture, test_timer_with_zero_period) {
rcl_clock_t clock;
rcl_allocator_t allocator = rcl_get_default_allocator();
rcl_ret_t ret = rcl_clock_init(RCL_STEADY_TIME, &clock, &allocator);
ASSERT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
OSRF_TESTING_TOOLS_CPP_SCOPE_EXIT(
{
rcl_ret_t ret = rcl_clock_fini(&clock);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
});

rcl_timer_t timer = rcl_get_zero_initialized_timer();
ret = rcl_timer_init(
&timer, &clock, this->context_ptr, 0, nullptr, rcl_get_default_allocator());
ASSERT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
OSRF_TESTING_TOOLS_CPP_SCOPE_EXIT(
{
rcl_ret_t ret = rcl_timer_fini(&timer);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
});

bool is_ready = false;
ret = rcl_timer_is_ready(&timer, &is_ready);
EXPECT_TRUE(is_ready) << rcl_get_error_string().str;
rcl_reset_error();

int64_t time_until_next_call = 0;
ret = rcl_timer_get_time_until_next_call(&timer, &time_until_next_call);
EXPECT_EQ(RCL_RET_OK, ret) << rcl_get_error_string().str;
EXPECT_LE(time_until_next_call, 0);
rcl_reset_error();

EXPECT_EQ(RCL_RET_OK, rcl_timer_call(&timer)) << rcl_get_error_string().str;
rcl_reset_error();
}

TEST_F(TestTimerFixture, test_canceled_timer) {
rcl_ret_t ret;

Expand Down Expand Up @@ -567,6 +665,7 @@ TEST_F(TestPreInitTimer, test_timer_get_allocator) {
EXPECT_TRUE(rcutils_allocator_is_valid(allocator_returned));

EXPECT_EQ(NULL, rcl_timer_get_allocator(nullptr));
rcl_reset_error();
}

TEST_F(TestPreInitTimer, test_timer_clock) {
Expand Down Expand Up @@ -601,6 +700,7 @@ TEST_F(TestPreInitTimer, test_timer_call) {

EXPECT_EQ(RCL_RET_OK, rcl_timer_cancel(&timer)) << rcl_get_error_string().str;
EXPECT_EQ(RCL_RET_TIMER_CANCELED, rcl_timer_call(&timer));
rcl_reset_error();
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If you're going to start adding in more rcl_reset_error() statements where you don't expect errors. It might be good to add, EXPECT_FALSE(rcl_error_is_set()) before it so you know you're not swallowing an error.

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Hmm, do you mean we ensure we don't have false RCL_RET_OKs?

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Still not sure, so I'm rolling those back. See 6aa785e.

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Sorry I missed this comment. I meant to ensure that rcl_error_is_set() returns false before resetting it. That way if the error is set, we find out about it before resetting it for the next test segment.

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Oh, but we would've found out about it when the success expectation is broken. In any case, I rolled it back. We can discuss whether we should be doing those checks irrespective of return codes on a follow-up issue/PR.

EXPECT_EQ(times_called, 4);
}

Expand Down Expand Up @@ -650,17 +750,21 @@ TEST_F(TestPreInitTimer, test_invalid_init_fini) {
rcl_allocator_t bad_allocator = get_failing_allocator();
rcl_timer_t timer_fail = rcl_get_zero_initialized_timer();

rcl_reset_error();
EXPECT_EQ(
RCL_RET_ALREADY_INIT, rcl_timer_init(
&timer, &clock, this->context_ptr, 500, nullptr,
rcl_get_default_allocator())) << rcl_get_error_string().str;
rcl_reset_error();

ASSERT_EQ(
RCL_RET_BAD_ALLOC, rcl_timer_init(
&timer_fail, &clock, this->context_ptr, RCL_S_TO_NS(1), timer_callback_test,
bad_allocator)) << rcl_get_error_string().str;
rcl_reset_error();

EXPECT_EQ(RCL_RET_OK, rcl_timer_fini(nullptr));
rcl_reset_error();
}

TEST_F(TestPreInitTimer, test_timer_get_period) {
Expand All @@ -669,14 +773,18 @@ TEST_F(TestPreInitTimer, test_timer_get_period) {
EXPECT_EQ(RCL_S_TO_NS(1), period);

EXPECT_EQ(RCL_RET_INVALID_ARGUMENT, rcl_timer_get_period(nullptr, &period));
rcl_reset_error();
EXPECT_EQ(RCL_RET_INVALID_ARGUMENT, rcl_timer_get_period(&timer, nullptr));
rcl_reset_error();
}

TEST_F(TestPreInitTimer, test_time_since_last_call) {
rcl_time_point_value_t time_sice_next_call_start = 0u;
rcl_time_point_value_t time_sice_next_call_end = 0u;

ASSERT_EQ(RCL_RET_OK, rcl_timer_get_time_since_last_call(&timer, &time_sice_next_call_start));
// Cope with coarse system time resolution.
std::this_thread::sleep_for(std::chrono::milliseconds(1));
ASSERT_EQ(RCL_RET_OK, rcl_timer_get_time_since_last_call(&timer, &time_sice_next_call_end));
EXPECT_GT(time_sice_next_call_end, time_sice_next_call_start);
}