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package log
import (
"io"
"os"
"testing"
"github.com/go-kit/kit/log/term"
)
var (
// reuse the same logger across all tests
_testingLogger Logger
)
// TestingLogger returns a TMLogger which writes to STDOUT if testing being run
// with the verbose (-v) flag, NopLogger otherwise.
//
// Note that the call to TestingLogger() must be made
// inside a test (not in the init func) because
// verbose flag only set at the time of testing.
func TestingLogger() Logger {
return TestingLoggerWithOutput(os.Stdout)
}
// TestingLoggerWOutput returns a TMLogger which writes to (w io.Writer) if testing being run
// with the verbose (-v) flag, NopLogger otherwise.
//
// Note that the call to TestingLoggerWithOutput(w io.Writer) must be made
// inside a test (not in the init func) because
// verbose flag only set at the time of testing.
func TestingLoggerWithOutput(w io.Writer) Logger {
if _testingLogger != nil {
return _testingLogger
}
if testing.Verbose() {
_testingLogger = NewTMLogger(NewSyncWriter(w))
} else {
_testingLogger = NewNopLogger()
}
return _testingLogger
}
// TestingLoggerWithColorFn allow you to provide your own color function. See
// TestingLogger for documentation.
func TestingLoggerWithColorFn(colorFn func(keyvals ...interface{}) term.FgBgColor) Logger {
if _testingLogger != nil {
return _testingLogger
}
if testing.Verbose() {
_testingLogger = NewTMLoggerWithColorFn(NewSyncWriter(os.Stdout), colorFn)
} else {
_testingLogger = NewNopLogger()
}
return _testingLogger
}
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