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Add an example on providing streams with CATCH_CONFIG_NOSTDOUT
Related to #1037 Closes #1290
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@ -10,7 +10,7 @@
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- Fixture: [Class-based fixtures](../examples/110-Fix-ClassFixture.cpp)
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- BDD: [SCENARIO, GIVEN, WHEN, THEN](../examples/120-Bdd-ScenarioGivenWhenThen.cpp)
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- Listener: [Listeners](../examples/210-Evt-EventListeners.cpp)
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- Configuration: [Provide your own output streams](../examples/231-Cfg-OutputStreams.cpp)
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## Planned
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49
examples/231-Cfg-OutputStreams.cpp
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49
examples/231-Cfg-OutputStreams.cpp
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@ -0,0 +1,49 @@
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// 231-Cfg-OutputStreams.cpp
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// Show how to replace the streams with a simple custom made streambuf.
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// Note that this reimplementation _does not_ follow `std::cerr`
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// semantic, because it buffers the output. For most uses however,
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// there is no important difference between having `std::cerr` buffered
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// or unbuffered.
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#define CATCH_CONFIG_NOSTDOUT
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#define CATCH_CONFIG_MAIN
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#include <catch2/catch.hpp>
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class out_buff : public std::stringbuf {
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std::FILE* m_stream;
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public:
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out_buff(std::FILE* stream) :m_stream(stream) {}
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~out_buff() { pubsync(); }
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int sync() {
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int ret = 0;
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for (unsigned char c : str()) {
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if (putc(c, m_stream) == EOF) {
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ret = -1;
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break;
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}
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}
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// Reset the buffer to avoid printing it multiple times
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str("");
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return ret;
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}
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};
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namespace Catch {
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std::ostream& cout() {
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static std::ostream ret(new out_buff(stdout));
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return ret;
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}
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std::ostream& clog() {
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static std::ostream ret(new out_buff(stderr));
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return ret;
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}
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std::ostream& cerr() {
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return clog();
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}
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}
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TEST_CASE("This binary uses putc to write out output", "[compilation-only]") {
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SUCCEED("Nothing to test.");
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}
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@ -17,6 +17,7 @@ set( HEADER_DIR ${CATCH_DIR}/single_include )
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set( SOURCES_SINGLE_FILE
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010-TestCase.cpp
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231-Cfg-OutputStreams.cpp
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)
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# multiple-file modules:
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