与柴和Eshint的单元测试没有通过

Question

Hope you can help, recently moved from jshint to eslint and Im looking to see how to get my tests to pass wihtout making changes;

Take for exmaple the following test

expect(ctrl.screens).to.not.be.undefined;

eshint complains with the following expection;

error  Expected an assignment or function call and instead saw an expression  no-unused-expressions

Changing the test to;

expect(ctrl.screens).to.not.be.undefined();

Gives the following error:

TypeError: '[object Object]' is not a function (evaluating 'expect(ctrl.screens).to.not.be.undefined()')

Any ideas what approach to take here? All the tests pass when I remove eshint from the task list so I need for some way to clean up these tests.

J

Answer 1

Testing for undefined is tricky. There are some alternative ways to do it. I normally check for typeof(variable) === 'undefined .

Example:

expect(typeof(ctrl.screens)).to.not.equal('undefined');