Forum: RSpec Selectively ignoring exceptions in examples

E540cdc2ce3a8fc669d040143ed3d461?d=identicon&s=25 Ash Moran (Guest)
on 2011-09-01 16:35
(Received via mailing list)
Hi all

Long time since I've posted here, hope you're all well :-)

I have a question about ignoring exceptions when they're not
interesting. For example, I have a few cases in my code along these
lines

    it "prints an error" do
      expect {
        run_command(%w[ missing_wallet.dat ])
      }.to raise_error

      stream_bundle.captured_error.should eq "Couldn't find wallet file:
missing_wallet.dat\n"
    end

    it "raises a CLI::CommandError" do
      expect {
        run_command(%w[ missing_wallet.dat ])
      }.to raise_error(CLI::CommandError)
    end

But in the first example, I'm only bothered about the output, not the
error. So I was thinking of writing something along the lines of:

    it "prints an error" do
      ignoring_errors {
        run_command(%w[ missing_wallet.dat ])
      }
      stream_bundle.captured_error.should eq "Couldn't find wallet file:
missing_wallet.dat\n"
    end

Now obviously that wouldn't be hard to add as a helper method. But it
got me thinking

* Do any of you do this?
* Does RSpec already let you somehow?
* Is it a useful convention?
* Is it hiding anything else? (I don't use exceptions much, so I may be
abusing them.)

Cheers
Ash

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