source: trip-planner-front/node_modules/loglevel/test/console-fallback-test.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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Line 
1"use strict";
2
3function consoleLogIsCalledBy(log, methodName) {
4 it(methodName + " calls console.log", function() {
5 log.setLevel(log.levels.TRACE);
6 log[methodName]("Log message for call to " + methodName);
7 expect(console.log.calls.length).toEqual(1);
8 });
9}
10
11function mockConsole() {
12 return {"log" : jasmine.createSpy("console.log")};
13}
14
15define(['../lib/loglevel'], function(log) {
16 var originalConsole = window.console;
17
18 describe("Fallback functionality:", function() {
19 describe("with no console present", function() {
20 beforeEach(function() {
21 window.console = undefined;
22 });
23
24 afterEach(function() {
25 window.console = originalConsole;
26 });
27
28 it("silent method calls are allowed", function() {
29 var result = log.setLevel(log.levels.SILENT);
30 log.trace("hello");
31
32 expect(result).toBeUndefined();
33 });
34
35 it("setting an active level gently returns an error string", function() {
36 var result = log.setLevel(log.levels.TRACE);
37 expect(result).toEqual("No console available for logging");
38 });
39
40 it("active method calls are allowed, once the active setLevel fails", function() {
41 log.setLevel(log.levels.TRACE);
42 log.trace("hello");
43 });
44
45 describe("if a console later appears", function () {
46 it("logging is re-enabled and works correctly when next used", function () {
47 log.setLevel(log.levels.WARN);
48
49 window.console = mockConsole();
50 log.error("error");
51
52 expect(window.console.log).toHaveBeenCalled();
53 });
54
55 it("logging is re-enabled but does nothing when used at a blocked level", function () {
56 log.setLevel(log.levels.WARN);
57
58 window.console = mockConsole();
59 log.trace("trace");
60
61 expect(window.console.log).not.toHaveBeenCalled();
62 });
63
64 it("changing level works correctly from that point", function () {
65 window.console = mockConsole();
66 var result = log.setLevel(log.levels.WARN);
67
68 expect(result).toBeUndefined();
69 });
70 });
71 });
72
73 describe("with a console that only supports console.log", function() {
74 beforeEach(function() {
75 window.console = mockConsole();
76 });
77
78 afterEach(function() {
79 window.console = originalConsole;
80 });
81
82 it("log can be set to silent", function() {
83 log.setLevel(log.levels.SILENT);
84 });
85
86 it("log can be set to an active level", function() {
87 log.setLevel(log.levels.ERROR);
88 });
89
90 consoleLogIsCalledBy(log, "trace");
91 consoleLogIsCalledBy(log, "debug");
92 consoleLogIsCalledBy(log, "info");
93 consoleLogIsCalledBy(log, "warn");
94 consoleLogIsCalledBy(log, "trace");
95 });
96 });
97});
98
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