test: adds basic tests for logging

Tests cannot actually validate that the log channel output
is correct, see FIXME comment but at least they run through
the different versions of the API

Author: gnikit

test/logging.test.ts

@@ -0,0 +1,54 @@
+import { strictEqual } from 'assert';
+import { Logger, LogLevel, getConfigLogLevel } from '../src/services/logging';
+
+suite('Logging', () => {
+  const logger = new Logger();
+  test('Set and Get log level', () => {
+    logger.setLogLevel(LogLevel.DEBUG);
+    strictEqual(LogLevel.DEBUG, logger.getLogLevel());
+  });
+
+  test('Ignore low level messages', () => {
+    logger.setLogLevel(LogLevel.NONE);
+    logger.debug('This should not be logged');
+    logger.info('This should not be logged');
+    logger.warn('This should not be logged');
+    logger.error('This should not be logged');
+    // FIXME: We cannot yet read the output channel
+    // https://github.com/microsoft/vscode/issues/65108
+    strictEqual(true, true);
+  });
+
+  test('debug', () => {
+    logger.setLogLevel(LogLevel.DEBUG);
+    logger.debug('This should be logged');
+    logger.debug('This should be logged', { foo: 'bar' });
+  });
+
+  test('info', () => {
+    logger.setLogLevel(LogLevel.INFO);
+    logger.info('This should be logged');
+    logger.info('This should be logged', { foo: 'bar' });
+  });
+
+  test('warn', () => {
+    logger.setLogLevel(LogLevel.WARN);
+    logger.warn('This should be logged');
+    logger.warn('This should be logged', { foo: 'bar' });
+  });
+
+  test('error', () => {
+    logger.setLogLevel(LogLevel.ERROR);
+    logger.error('This should be logged');
+    logger.error('This should be logged', 'This is an error message');
+    logger.error('This should be logged', new Error('This is an error'));
+  });
+
+  test('getConfigLogLevel', () => {
+    strictEqual(LogLevel.DEBUG, getConfigLogLevel());
+  });
+
+  test('show', () => {
+    logger.show();
+  });
+});