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https://frontier.innolan.net/rainlance/c-ares.git
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af3ee9a8ba
The tests are written in C++11, using the GoogleTest and GoogleMock
frameworks. They have their own independent autoconf setup, so that
users of the library need not have a C++ compiler just to get c-ares
working (however, the test/configure.ac file does assume the use of
a shared top-level m4/ directory). However, this autoconf setup has
only been tested on Linux and OSX so far.
Run with "./arestest", or "./arestest -v" to see extra debug info.
The GoogleTest options for running specific tests are also
available (e.g. "./arestest --gtest_filter=*Live*").
The tests are nowhere near complete yet (currently hitting around
60% coverage as reported by gcov), but they do include examples
of a few different styles of testing:
- There are live tests (ares-test-live.cc), which assume that the
current machine has a valid DNS setup and connection to the
internet; these tests issue queries for real domains but don't
particularly check what gets returned. The tests will fail on
an offline machine.
- There a few mock tests (ares-test-mock.cc) that set up a fake DNS
server and inject its port into the c-ares library configuration.
These tests allow specific response messages to be crafted and
injected, and so are likely to be used for many more tests in
future.
- To make this generation/injection easier, the dns-proto.h file
includes C++ helper classes for building DNS packets.
- Other library entrypoints that don't require network activity
(e.g. ares_parse_*_reply) are tested directly.
- There are few tests of library-internal functions that are not
normally visible to API users (in ares-test-internal.cc).
- A couple of the tests use a helper method of the test fixture to
inject memory allocation failures, using the earlier change to the
library to allow override of malloc/realloc/free.
- There is also an entrypoint to allow Clang's libfuzzer to drive
the packet parsing code in ares_parse_*_reply, together with a
standalone wrapper for it (./aresfuzz) to allow use of afl-fuzz
for further fuzz testing.
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
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#include "ares-test.h"
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// library initialization is only needed for windows builds
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#ifdef USE_WINSOCK
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#define EXPECTED_NONINIT ARES_ENOTINITIALIZED
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#else
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#define EXPECTED_NONINIT ARES_SUCCESS
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#endif
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namespace ares {
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namespace test {
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TEST(LibraryInit, Basic) {
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EXPECT_EQ(EXPECTED_NONINIT, ares_library_initialized());
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EXPECT_EQ(ARES_SUCCESS, ares_library_init(ARES_LIB_INIT_ALL));
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EXPECT_EQ(ARES_SUCCESS, ares_library_initialized());
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ares_library_cleanup();
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EXPECT_EQ(EXPECTED_NONINIT, ares_library_initialized());
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}
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TEST(LibraryInit, DISABLED_InvalidParam) {
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// TODO: police flags argument to ares_library_init()
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EXPECT_EQ(ARES_EBADQUERY, ares_library_init(ARES_LIB_INIT_ALL << 2));
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EXPECT_EQ(EXPECTED_NONINIT, ares_library_initialized());
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ares_library_cleanup();
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}
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TEST(LibraryInit, Nested) {
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EXPECT_EQ(EXPECTED_NONINIT, ares_library_initialized());
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EXPECT_EQ(ARES_SUCCESS, ares_library_init(ARES_LIB_INIT_ALL));
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EXPECT_EQ(ARES_SUCCESS, ares_library_initialized());
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EXPECT_EQ(ARES_SUCCESS, ares_library_init(ARES_LIB_INIT_ALL));
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EXPECT_EQ(ARES_SUCCESS, ares_library_initialized());
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ares_library_cleanup();
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EXPECT_EQ(ARES_SUCCESS, ares_library_initialized());
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ares_library_cleanup();
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EXPECT_EQ(EXPECTED_NONINIT, ares_library_initialized());
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}
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TEST_F(LibraryTest, BasicChannelInit) {
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EXPECT_EQ(ARES_SUCCESS, ares_library_init(ARES_LIB_INIT_ALL));
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ares_channel channel = nullptr;
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EXPECT_EQ(ARES_SUCCESS, ares_init(&channel));
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EXPECT_NE(nullptr, channel);
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ares_destroy(channel);
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ares_library_cleanup();
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}
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TEST_F(LibraryTest, FailChannelInit) {
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EXPECT_EQ(ARES_SUCCESS,
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ares_library_init_mem(ARES_LIB_INIT_ALL,
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&LibraryTest::amalloc,
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&LibraryTest::afree,
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&LibraryTest::arealloc));
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SetAllocFail(1);
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ares_channel channel = nullptr;
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EXPECT_EQ(ARES_ENOMEM, ares_init(&channel));
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EXPECT_EQ(nullptr, channel);
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ares_library_cleanup();
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}
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#ifdef USE_WINSOCK
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TEST(Init, NoLibraryInit) {
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ares_channel channel = nullptr;
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EXPECT_EQ(ARES_ENOTINITIALIZED, ares_init(&channel));
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}
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#endif
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} // namespace test
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} // namespace ares
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