CODEWITHSUNDEEP
rubyunit-testingrspec
suvankar
suvankar

Reputation: 1558

How to write rspec test case to test successful execution of a method and exception condition also?

I want to write an rspec unit test case, so that if internet connection exists it will connect to gmail, else it will raise exception.

I have tried to write something, but it server only one part of the problem. How could I write a unit test case so that it can test both, ie. will assert exception if unable to connect gmail else will test successful connection. 

describe "#will create an authenticated gmail session" do
    it "should connect to gmail, if internet connection exists else raise exception" do
       @mail_sender = MailSender.new
       lambda { @mail_sender.connect_to_gmail}.should raise_error
    end
end

Method definition 

def connect_to_gmail
    begin
      gmail = Gmail.new('[email protected]', 'Password123' )
    rescue SocketError=>se
       raise "Unable to connect gmail #{se}"
    end
end

Upvotes: 0

Views: 900

Answers (1)

gotva
gotva

Reputation: 5998

You should use stubs or should_receive here.

case 1 (the behavior when internet connection exists):

it "should connect to gmail, if internet connection exists" do
  Gmail.should_receive(:new)
  @mail_sender = MailSender.new
  -> { @mail_sender.connect_to_gmail}.should_not raise_error
end

maybe you would like to return some object (Gmail.should_receive(:new).and_return(some_object)) and continue to work with this stubbed object

case 2 (the behavior when internet connection does not exist):

it "should raise error to gmail, if internet connection does not exist" do
  Gmail.stub(:new) { raise SocketError }
  @mail_sender = MailSender.new
  -> { @mail_sender.connect_to_gmail}.should raise_error
end

I hope this code helps you

Upvotes: 2

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