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v/vlib/log/log_test.v

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module log
import time
fn log_mutable_statements(mut log Log) {
println(@FN + ' start')
log.info('info')
log.warn('warn')
log.error('error')
log.debug('no output for debug')
log.set_level(.debug)
log.debug('debug now')
log.set_level(level_from_tag('INFO') or { Level.disabled })
log.info('info again')
log.set_level(level_from_tag('') or { Level.disabled })
log.error('no output anymore')
println(@FN + ' end')
}
fn logger_mutable_statements(mut log Logger) {
println(@FN + ' start')
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// the given logger instance could have a level to filter some levels used here
log.info('info')
log.warn('warn')
log.error('error')
log.debug('no output for debug')
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log.set_level(.debug) // change logging level, now part of the Logger interface
log.debug('output for debug now')
log.info('output for info now')
println(@FN + ' end')
}
fn delay() {
time.sleep(1 * time.second)
}
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// Note that Log and Logger methods requires a mutable instance
// new_log create and return a new Log reference
pub fn new_log() &Log {
return &Log{
level: .info
} // reference needed for its parallel usage
}
// new_log_as_logger create and return a new Log reference as a generic Logger
pub fn new_log_as_logger() &Logger {
return &Log{
level: .info
} // reference needed for its parallel usage
}
fn test_log_mutable() {
println(@FN + ' start')
mut log := Log{}
log.set_level(.info)
log_mutable_statements(mut log)
assert true
println(@FN + ' end')
}
fn test_log_mutable_reference() {
println(@FN + ' start')
mut log := new_log()
assert typeof(log).name == '&log.Log'
go log_mutable_statements(mut log)
delay() // wait to finish
assert true
println(@FN + ' end')
}
fn test_logger_mutable_reference() {
println(@FN + ' start')
// get log as Logger and use it
mut logger := new_log_as_logger()
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logger.set_level(.warn)
assert typeof(logger).name == '&log.Logger'
go logger_mutable_statements(mut logger)
delay() // wait to finish
assert true
println(@FN + ' end')
}