Initial project import

tools/v/vlib/log/log_test.v

@@ -0,0 +1,153 @@
+module log
+
+fn log_mutable_statements(mut l Log) {
+	println(@FN + ' start')
+	l.info('info')
+	l.warn('warn')
+	l.error('error')
+	l.debug('no output for debug')
+	l.set_level(.debug)
+	l.debug('debug now')
+	l.set_level(level_from_tag('INFO') or { Level.disabled })
+	l.info('info again')
+	l.set_level(level_from_tag('') or { Level.disabled })
+	l.error('no output anymore')
+	println(@FN + ' end')
+}
+
+fn logger_mutable_statements(mut l Logger) {
+	println(@FN + ' start')
+	// the given logger instance could have a level to filter some levels used here
+	l.info('info')
+	l.warn('warn')
+	l.error('error')
+	l.debug('no output for debug')
+	l.set_level(.debug) // change logging level, now part of the Logger interface
+	l.debug('output for debug now')
+	l.info('output for info now')
+	println(@FN + ' end')
+}
+
+// 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 l := Log{}
+	l.set_level(.info)
+	log_mutable_statements(mut l)
+	assert true
+	println(@FN + ' end')
+}
+
+fn test_log_mutable_reference() {
+	println(@FN + ' start')
+	mut l := new_log()
+	assert typeof(l).name == '&log.Log'
+	t := spawn log_mutable_statements(mut l)
+	t.wait()
+	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()
+	logger.set_level(.warn)
+	assert typeof(logger).name == '&log.Logger'
+	t := spawn logger_mutable_statements(mut logger)
+	t.wait()
+	assert true
+	println(@FN + ' end')
+}
+
+fn test_log_mutable_short_tag() {
+	println(@FN + ' start')
+	mut l := Log{}
+	l.set_level(.info)
+	l.set_short_tag(true)
+	log_mutable_statements(mut l)
+	assert true
+	println(@FN + ' end')
+}
+
+fn test_level_from_tag() ? {
+	assert level_from_tag('INFO')? == .info
+	assert level_from_tag('FATAL')? == .fatal
+	assert level_from_tag('WARN')? == .warn
+	assert level_from_tag('ERROR')? == .error
+	assert level_from_tag('DEBUG')? == .debug
+	assert level_from_tag('I')? == .info
+	assert level_from_tag('F')? == .fatal
+	assert level_from_tag('W')? == .warn
+	assert level_from_tag('E')? == .error
+	assert level_from_tag('D')? == .debug
+
+	invalid := ['', 'FOO', 'nope']
+
+	for value in invalid {
+		mut passed := false
+		level_from_tag(value) or { passed = true }
+		assert passed
+	}
+}
+
+fn test_target_from_label() ? {
+	assert target_from_label('console')? == .console
+	assert target_from_label('file')? == .file
+	assert target_from_label('both')? == .both
+
+	invalid := ['', 'FOO', 'nope']
+
+	for value in invalid {
+		mut passed := false
+		target_from_label(value) or { passed = true }
+		assert passed
+	}
+}
+
+fn test_log_time_format() {
+	println(@FN + ' start')
+	mut l := Log{}
+	l.set_level(.info)
+	l.set_time_format(.tf_rfc3339_nano)
+	assert TimeFormat.tf_rfc3339_nano == l.get_time_format()
+	l.info('${@FN} rfc3339_nano == YYYY-MM-DDTHH:mm:ss.123456789Z')
+	l.set_time_format(.tf_ymmdd)
+	assert TimeFormat.tf_ymmdd == l.get_time_format()
+	l.info('${@FN} ymmdd == YYYY-MM-DD')
+	l.set_custom_time_format('MMMM Do YY N kk:mm:ss A')
+	assert TimeFormat.tf_custom_format == l.get_time_format()
+	l.info('${@FN} custom like January 1st 22 AD 13:45:33 PM')
+	assert true
+	l.set_time_format(.tf_default)
+	l.set_local_time(true)
+	l.info('${@FN} time log in local time')
+	assert l.get_local_time()
+	l.set_local_time(false)
+	l.info('${@FN} time log in utc time')
+	assert !l.get_local_time()
+	println(@FN + ' end')
+}
+
+fn make_error() ?string {
+	return 'ok'
+}
+
+fn test_log_default_fatal_has_noreturn() {
+	_ := make_error() or { fatal('error') }
+}