cpp-logger/test/log_manager_test.cxx

//
//  log_manager_test.cxx
//  logger_test
//
//  Created by Sam Jaffe on 4/2/19.
//

#include "logger/log_manager.h"

#include "resource_factory/prototype_factory.hpp"

#include "logger/c_logger.h"
#include "logger/exception.h"
#include "logger/logger.h"
#include "logger/properties.h"

#include "mock_logger.h"

using namespace logging;

class LogManagerTest : public ::testing::Test {
public:
  void SetUp() override;
  void TearDown() override;

protected:
  std::shared_ptr<MockAppender> appender;
  std::shared_ptr<MockLayout> layout;

private:
  appenders::scoped_binding abinding_;
  layouts::scoped_binding lbinding_;
};

namespace logging {
  level level_from_string(std::string const & value);
}

void LogManagerTest::SetUp() {
  auto GetMock = [this](properties const & props) {
    appender = std::make_shared<MockAppender>();
    if (props.contains("threshold")) {
      appender->threshold = level_from_string(props["threshold"]);
    }
    return appender;
  };
  abinding_ = appenders::instance().bind_scoped("Mock", GetMock);
  auto GetMockLayout = [this](properties const &) {
    return layout = std::make_shared<MockLayout>();
  };
  lbinding_ = layouts::instance().bind_scoped("MockLayout", GetMockLayout);
}

void LogManagerTest::TearDown() {
  abinding_.reset();
  lbinding_.reset();
}

extern properties const APPENDER_LEVEL_PROPERTY_SCHEMA;
extern properties const DEFAULT_LAYOUT_PROPERTY_SCHEMA;
extern properties const LOGGER_LEVEL_PROPERTY_SCHEMA;
extern properties const MIN_PROPERTY_SCHEMA;
extern properties const MULTIPLEX_PROPERTY_SCHEMA;

TEST_F(LogManagerTest, CanInjectMock) {
  manager().configure(MIN_PROPERTY_SCHEMA);
  EXPECT_THAT(appender, ::testing::NotNull());
  EXPECT_THAT(layout, ::testing::NotNull());
}

TEST_F(LogManagerTest, IfNoLayoutIsProvidedThenWeUseTheDefault) {
  manager().configure(DEFAULT_LAYOUT_PROPERTY_SCHEMA);
  EXPECT_THAT(appender, ::testing::NotNull());
  EXPECT_THAT(layout, testing::IsNull());
}

TEST_F(LogManagerTest, WillThrowIfSchemaError) {
  using namespace logging::property;
  // clang-format off
  properties const BAD_SCHEMA = _obj({
    {"configuration", _obj({
      {"loggers", _obj({
        {"root", _obj({
          {"appenders", _v("Mock")}
        })}
      })},
      {"appenders", _obj({})}
    })}
  });
  // clang-format on
  EXPECT_THROW(manager().configure(BAD_SCHEMA), invalid_property_type);
}

using ::testing::_;
using ::testing::AnyNumber;

TEST_F(LogManagerTest, CanFetchInjectedMock) {
  manager mgr;
  mgr.configure(MIN_PROPERTY_SCHEMA);

  EXPECT_CALL(*appender, flush()).Times(AnyNumber());
  EXPECT_CALL(*appender, write(MessageEq("TEST MESSAGE"), _));

  c_logger l = mgr.c_get();
  l.error("TEST MESSAGE");
}

TEST_F(LogManagerTest, MultiplexMockLogsToMultipleImpls) {
  manager mgr;
  mgr.configure(MULTIPLEX_PROPERTY_SCHEMA);

  EXPECT_CALL(*appender, flush()).Times(AnyNumber());
  EXPECT_CALL(*appender, write(MessageEq("TEST MESSAGE"), _)).Times(2);

  c_logger l = mgr.c_get();
  l.error("TEST MESSAGE");
}

TEST_F(LogManagerTest, LevelCanBeBakedIntoAppenderProperties) {
  manager mgr;
  mgr.configure(APPENDER_LEVEL_PROPERTY_SCHEMA);

  EXPECT_CALL(*appender, flush()).Times(AnyNumber());
  EXPECT_CALL(*appender, write(MessageEq("TEST MESSAGE"), _)).Times(1);
  EXPECT_CALL(*appender, write(MessageEq("LOWER MESSAGE"), _)).Times(0);

  c_logger l = mgr.c_get();
  l.warn("TEST MESSAGE");
  l.info("LOWER MESSAGE");
}

TEST_F(LogManagerTest, LevelCanBeBakedIntoLoggerProperties) {
  manager mgr;
  mgr.configure(LOGGER_LEVEL_PROPERTY_SCHEMA);

  EXPECT_CALL(*appender, flush()).Times(AnyNumber());
  EXPECT_CALL(*appender, write(_, _)).Times(0);

  c_logger l = mgr.c_get();
  l.warn("TEST MESSAGE");
}

TEST_F(LogManagerTest, CanFetchLoggerByName) {
  manager mgr;
  mgr.configure(MIN_PROPERTY_SCHEMA);

  EXPECT_CALL(*appender, flush()).Times(AnyNumber());
  EXPECT_CALL(*appender, write(MessageEq("TEST MESSAGE"), _));

  c_logger l = mgr.c_get("root");
  l.error("TEST MESSAGE");
}

TEST_F(LogManagerTest, ThrowsIfAskingForNonExistantLoggerName) {
  manager mgr;
  mgr.configure(MIN_PROPERTY_SCHEMA);

  EXPECT_THROW(mgr.c_get("Mock"), std::out_of_range);
  EXPECT_THROW(mgr.get("Mock"), std::out_of_range);
}