testing.hpp File Reference

Detailed Description

Utilities for analyzing emitted metrics in unit tests.

Definition in file testing.hpp.

Go to the source code of this file.

#include <iosfwd>
#include <optional>
#include <stdexcept>
#include <string>
#include <vector>
#include <userver/utils/not_null.hpp>
#include <userver/utils/statistics/labels.hpp>
#include <userver/utils/statistics/metric_value.hpp>
#include <userver/utils/statistics/storage.hpp>

This graph shows which files directly or indirectly include this file:

Classes
class	utils::statistics::MetricQueryError
	Thrown by statistics::Snapshot queries on unexpected metrics states. More...
class	utils::statistics::Snapshot
	A snapshot of metrics from utils::statistics::Storage. More...

Namespaces
namespace	utils
	Utilities.

Functions
void	utils::statistics::PrintTo (const Snapshot &data, std::ostream *)
	Support for gtest diagnostics for utils::statistics::Snapshot.
void	utils::statistics::PrintTo (MetricValue value, std::ostream *)
	Support for gtest diagnostics for utils::statistics::MetricValue.

Function Documentation

PrintTo()

void utils::statistics::PrintTo	(	const Snapshot &	data,
		std::ostream *	)

Support for gtest diagnostics for utils::statistics::Snapshot.

Warning

Never check the printed value programmatically! The string is not stable and may change, depending on the version of stdlib and userver.

Valid usage:

EXPECT_EQ(..., ...) << testing::PrintToString(snapshot);

Invalid usage:

std::ostringstream stream;
PrintTo(snapshot, &stream);
EXPECT_EQ(stream.str(), ...);