Issue #1852: Add a way to pass a global context to lolex when calling useFakeTimers

[LouisBrunner]

Purpose (TL;DR)

Partial fix of issue #1852: Add a way to pass a global context to lolex when calling useFakeTimers

Background

As discussed in #1852, some environments make sinon.useFakeTimers crash, because of lolex, when some properties are missing in the global object. The issue has been improved by triggering a more explicit error in lolex, however this PR adds a way to provide the global context directly and forward it to lolex.

Solution

This PR adds an extra property when using sinon.useFakeTimers with an object argument: by giving the global property, lolex.withGlobal(global) will be called and used to install the clock instead of using the default implementation.

How to verify

Checkout this repositoy for an example of an environment that triggers this bug.

[coveralls]

Pull Request Test Coverage Report for Build 2727

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 94.881%

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Totals
Change from base Build 2726:	0.02%
Covered Lines:	2065
Relevant Lines:	2137

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💛 - Coveralls

[fatso83]

Looks great!

[mroderick]

This has been published as sinon@7.1.0. Thank you :)