Rspec for ssh connection - ruby

Question

I am trying to write rspec to test ssh connection. In my spec file even though I have enetered incorrect server password it still says 0 examples, 0 failures. Can someone exmplain me why am I seeing that whereas I am expected to see at least one failure message.
Below is the piece of code of my ssh_host.rb and ssh_host_spec.rb files.
require "java"
require "highline/import"
require 'open-uri'
require 'socket'
require 'rubygems'
require 'net/ssh'
require 'stringio'
require 'net/scp'
require 'colorize'
module SshMod
class SshHost
attr_accessor :hostname, :username, :password
def initialize(host, user, password)
#hostname = host
#username = user
#password = password
#ssh = Net::SSH.start(#hostname, #username, :password => #password)
puts "\t Connection established for #{#hostname}...".blue
end
end
end
Rspec Class:
#!/usr/bin/env rspec
require 'spec_helper'
require 'ssh_host.rb'
describe SshMod::SshHost do
before :each do
#ssh = SshMod::SshHost.new "servername", "user", "wrong_password"
end
end
describe "#new" do
it "takes three parameters and returns sshhostobject" do
#ssh.should_be_an_instance_of SshHost
end
end
ssh_mock = double()
expect(SSH).to receive(:start).and_return(ssh_mock)

Answer 1

There are a number of things wrong with your spec file. your test for new should be within the context of your SshMod::SshHost describe otherwise it doesn't have access to the ssh instance variable. Also, your code should throw some errors because except isn't defined in Kernel it's within the context of an Rspec object. You most likely want to put it in your before.
Regarding your requires in your ruby class, I'd get rid of everything that you don't need (for example, why the explicit inclusion of socket when using net-ssh?).
I believe however, that you're running into the issue where no tests are running most likely due to your project structure (but that's only a guess since you haven't listed it). Rspec by default looks for spec files listed under spec/**/*_spec.rb which you can override with the --pattern flag. See rspec --help for more info.
Here's a working example of your code with a bunch of things cleaned up. I put the source of your code in lib assuming you're making something like a gem.
Gemfile:
source "https://rubygems.org"
gem "colorize"
gem "rspec"
gem "net-ssh"
lib/ssh_host.rb
require 'net/ssh'
require 'colorize'
module SshMod
class SshHost
attr_accessor :hostname, :username, :password
def initialize(host, user, password)
#hostname = host
#username = user
#password = password
#ssh = Net::SSH.start(#hostname, #username, password: #password)
puts "\t Connection established for #{#hostname}...".blue
end
end
end
spec/spec_helper.rb
$:.unshift File.join(File.dirname(__FILE__), '..', 'lib')
require 'rspec'
RSpec.configure do |config|
config.mock_with :rspec do |mocks|
mocks.verify_partial_doubles = true
end
end
spec/ssh_host_spec.rb
require 'spec_helper'
require 'ssh_host'
describe SshMod::SshHost do
let (:ssh) { SshMod::SshHost.new "servername", "user", "wrong_password" }
before :each do
allow(Net::SSH).to receive(:start).and_return(double("connection"))
end
describe "#new" do
it "takes three parameters and returns sshhostobject" do
expect(ssh).to be_a SshMod::SshHost
end
end
end