Ruby Rspec Expect To Match

Ruby rspec expect to match.

If you want to use rspec expectations with another tool like test unit minitest or cucumber you can install it directly. Most matchers can also be accessed using the should and should not syntax. Each matcher can be used with expect to or expect not to to define positive and negative expectations respectively on an object.

If you want to use rspec expectations with rspec just install the rspec gem and rubygems will also install rspec expectations for you along with rspec core and rspec mocks. They provide generic case equality pattern matching operator which is one of nicest and most underused ruby. See using should syntax for why we recommend using expect. Next is the it block.

Then you need to create a describe block to group all your tests together to tell rspec which class you are testing. End this is the initial code for writing your first rspec test. Rspec ruby complexed nested hash arguments fuzzy match use expect receive syntax and with matcher. All of this is possible because of rspec matchers composability they are designed to play well when combined.

You need to require the rspec gem. It is pretty easy to achieve reasonable matcher output both for success in format doc mode and fail what exactly failed and diffs of expected and actual. Rspec describe a string do it is expected to match str it is expected not to match foo deliberate failures it is expected not to match str it. Rspec expectations ships with a number of built in matchers.

Describe factorial do it does something do. Gem install rspec expectations contributing. Require rspec autorun describe factorial do.

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