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Add support for retrieving generator's element as string

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This commit is contained in:
Martin Hořeňovský
2022-05-16 16:34:06 +02:00
parent af8b54ecd5
commit 48f3226974
5 changed files with 153 additions and 7 deletions
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89
tests/SelfTest/IntrospectiveTests/GeneratorsImpl.tests.cpp
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@@ -424,3 +424,92 @@ TEST_CASE("Generators count returned elements", "[generators][approvals]") {
REQUIRE_FALSE( generator.countedNext() );
REQUIRE( generator.currentElementIndex() == 2 );
}
TEST_CASE( "Generators can stringify their elements",
"[generators][approvals]" ) {
auto generator =
Catch::Generators::FixedValuesGenerator<int>( { 1, 2, 3 } );
REQUIRE( generator.currentElementAsString() == "1"_catch_sr );
REQUIRE( generator.countedNext() );
REQUIRE( generator.currentElementAsString() == "2"_catch_sr );
REQUIRE( generator.countedNext() );
REQUIRE( generator.currentElementAsString() == "3"_catch_sr );
}
namespace {
class CustomStringifyGenerator
: public Catch::Generators::IGenerator<bool> {
bool m_first = true;
std::string stringifyImpl() const override {
return m_first ? "first" : "second";
}
bool next() override {
if ( m_first ) {
m_first = false;
return true;
}
return false;
}
public:
bool const& get() const override;
};
// Avoids -Wweak-vtables
bool const& CustomStringifyGenerator::get() const { return m_first; }
} // namespace
TEST_CASE( "Generators can override element stringification",
"[generators][approvals]" ) {
CustomStringifyGenerator generator;
REQUIRE( generator.currentElementAsString() == "first"_catch_sr );
REQUIRE( generator.countedNext() );
REQUIRE( generator.currentElementAsString() == "second"_catch_sr );
}
namespace {
class StringifyCountingGenerator
: public Catch::Generators::IGenerator<bool> {
bool m_first = true;
mutable size_t m_stringificationCalls = 0;
std::string stringifyImpl() const override {
++m_stringificationCalls;
return m_first ? "first" : "second";
}
bool next() override {
if ( m_first ) {
m_first = false;
return true;
}
return false;
}
public:
bool const& get() const override;
size_t stringificationCalls() const { return m_stringificationCalls; }
};
// Avoids -Wweak-vtables
bool const& StringifyCountingGenerator::get() const { return m_first; }
} // namespace
TEST_CASE( "Generator element stringification is cached",
"[generators][approvals]" ) {
StringifyCountingGenerator generator;
REQUIRE( generator.currentElementAsString() == "first"_catch_sr );
REQUIRE( generator.currentElementAsString() == "first"_catch_sr );
REQUIRE( generator.currentElementAsString() == "first"_catch_sr );
REQUIRE( generator.currentElementAsString() == "first"_catch_sr );
REQUIRE( generator.currentElementAsString() == "first"_catch_sr );
REQUIRE( generator.stringificationCalls() == 1 );
}
// caching?