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test.js
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test.js
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/* eslint-env mocha */
const assert = require('assert');
const debug = require('./src');
const sinon = require('sinon');
describe('debug', () => {
it('passes a basic sanity check', () => {
const log = debug('test');
log.enabled = true;
log.log = () => {};
assert.doesNotThrow(() => log('hello world'));
});
it('allows namespaces to be a non-string value', () => {
const log = debug('test');
log.enabled = true;
log.log = () => {};
assert.doesNotThrow(() => debug.enable(true));
});
it('honors global debug namespace enable calls', () => {
assert.deepStrictEqual(debug('test:12345').enabled, false);
assert.deepStrictEqual(debug('test:67890').enabled, false);
debug.enable('test:12345');
assert.deepStrictEqual(debug('test:12345').enabled, true);
assert.deepStrictEqual(debug('test:67890').enabled, false);
});
it('uses custom log function', () => {
const log = debug('test');
log.enabled = true;
const messages = [];
log.log = (...args) => messages.push(args);
log('using custom log function');
log('using custom log function again');
log('%O', 12345);
assert.deepStrictEqual(messages.length, 3);
});
it('should log errors with full stack', function() {
// fake the current time to be 1970-01-01T00:00:00.000Z
sinon.useFakeTimers(new Date(0));
const log = debug('test');
log.useColors = false;
log.enabled = true;
log.log = sinon.fake();
const fakeError = new Error('test');
fakeError.stack = 'Error: test\n at test:1:1';
log(fakeError);
// +0ms format for the browser,
// ISO8601 format for node.js
assert.ok(
log.log.calledOnceWithExactly(
'test Error: test\n at test:1:1 +0ms'
) ||
log.log.calledOnceWithExactly(
'1970-01-01T00:00:00.000Z test Error: test\n at test:1:1'
)
);
});
describe('extend namespace', () => {
it('should extend namespace', () => {
const log = debug('foo');
log.enabled = true;
log.log = () => {};
const logBar = log.extend('bar');
assert.deepStrictEqual(logBar.namespace, 'foo:bar');
});
it('should extend namespace with custom delimiter', () => {
const log = debug('foo');
log.enabled = true;
log.log = () => {};
const logBar = log.extend('bar', '--');
assert.deepStrictEqual(logBar.namespace, 'foo--bar');
});
it('should extend namespace with empty delimiter', () => {
const log = debug('foo');
log.enabled = true;
log.log = () => {};
const logBar = log.extend('bar', '');
assert.deepStrictEqual(logBar.namespace, 'foobar');
});
it('should keep the log function between extensions', () => {
const log = debug('foo');
log.log = () => {};
const logBar = log.extend('bar');
assert.deepStrictEqual(log.log, logBar.log);
});
});
describe('rebuild namespaces string (disable)', () => {
it('handle names, skips, and wildcards', () => {
debug.enable('test,abc*,-abc');
const namespaces = debug.disable();
assert.deepStrictEqual(namespaces, 'test,abc*,-abc');
});
it('handles empty', () => {
debug.enable('');
const namespaces = debug.disable();
assert.deepStrictEqual(namespaces, '');
assert.deepStrictEqual(debug.names, []);
assert.deepStrictEqual(debug.skips, []);
});
it('handles all', () => {
debug.enable('*');
const namespaces = debug.disable();
assert.deepStrictEqual(namespaces, '*');
});
it('handles skip all', () => {
debug.enable('-*');
const namespaces = debug.disable();
assert.deepStrictEqual(namespaces, '-*');
});
it('names+skips same with new string', () => {
debug.enable('test,abc*,-abc');
const oldNames = [...debug.names];
const oldSkips = [...debug.skips];
const namespaces = debug.disable();
assert.deepStrictEqual(namespaces, 'test,abc*,-abc');
debug.enable(namespaces);
assert.deepStrictEqual(
oldNames.map(String),
debug.names.map(String)
);
assert.deepStrictEqual(
oldSkips.map(String),
debug.skips.map(String)
);
});
it('handles re-enabling existing instances', () => {
debug.disable('*');
const inst = debug('foo');
const messages = [];
inst.log = msg =>
messages.push(msg.replace(/^[^@]*@([^@]+)@.*$/, '$1'));
inst('@test@');
assert.deepStrictEqual(messages, []);
debug.enable('foo');
assert.deepStrictEqual(messages, []);
inst('@test2@');
assert.deepStrictEqual(messages, ['test2']);
inst('@test3@');
assert.deepStrictEqual(messages, ['test2', 'test3']);
debug.disable('*');
inst('@test4@');
assert.deepStrictEqual(messages, ['test2', 'test3']);
});
});
});