test: Added logging tests

Author: thim81

test/logging.test.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const {describe, it, expect, beforeEach, afterEach} = require('@jest/globals');
+const {infoOut, logOut, debugOut, infoTable} = require('../utils/logging');
+
+describe('logging utils', () => {
+  let warnSpy;
+
+  beforeEach(() => {
+    warnSpy = jest.spyOn(console, 'warn').mockImplementation(() => {});
+  });
+
+  afterEach(() => {
+    warnSpy.mockRestore();
+  });
+
+  it('infoOut should write warnings', () => {
+    infoOut('hello');
+    expect(warnSpy).toHaveBeenCalledWith('hello');
+  });
+
+  it('logOut should respect verbose level', () => {
+    logOut('quiet', 0);
+    expect(warnSpy).not.toHaveBeenCalled();
+
+    logOut('loud', 1);
+    expect(warnSpy).toHaveBeenCalledWith('loud');
+  });
+
+  it('debugOut should write only for verbose level >= 2', () => {
+    debugOut('nope', 1);
+    expect(warnSpy).not.toHaveBeenCalled();
+
+    debugOut('yep', 2);
+    expect(warnSpy).toHaveBeenCalledWith('yep');
+  });
+
+  it('infoTable should render table in verbose mode', () => {
+    const table = infoTable({a: '1', b: ['x', 'y']}, 1);
+    expect(table).toContain('| a | 1    |');
+    expect(table).toContain('| b | x, y |');
+  });
+});