CODEWITHSUNDEEP
rspec
itsh
itsh

Reputation: 1123

How to pass the output of one method to another in RSpec?

I have a class called db_conn.rb in which I have 2-methods 1. One method is to check if db connection is established or not which is called is_conn? 2. Another one is to close db connection i.e., close_conn.

Now I want to write rspec for close_conn. My logic is to run close_conn and then call is_conn? to check the boolean value which should be false.

Below is my spec file. I need more guidance in achieving this.

describe DdModule::DbConnn do
   before(:context) { 
       puts "Testing DB connection..."
       @obj = DbModule::DbConn.new("hostname", "instance", "port", "user", "pass")
    }


it "connect_db constructor takes five parameters and returns true if connection establishes" do
    expect(@obj.is_conn?).to eq true
end

it "connect_db close_connection should close the connection and is_connection should return false" do
    @obj.close_conn
    expect(@db_obj.is_conn?).to eq false
end

I am seeing the following output:

rspec
Testing DB connection...
Oracle Connection user@jdbc:oracle:thin:@host:1521/instance initialized..
.FFF

Failures:

1) DbModule::DbConn close_connection should close the connection and is_conn should return false
 Failure/Error: expect(@obj.is_conn?).to eq false

   expected: false
        got: true

   (compared using ==)
 # ./spec/conn_db_spec.rb:21:in `(root)'
Finished in 0.2 seconds (files took 0.27 seconds to load)
2 examples, 1 failures

Upvotes: 1

Views: 153

Answers (1)

MilesStanfield
MilesStanfield

Reputation: 4639

If it's an instance method that you expect to change with another instance method, you need to write your expectation like this (i made a test class locally to ensure it works). 

expect {@obj.close_conn}.to change(@obj, :is_conn?).from(true).to(false)

If it were me, I would write the full spec like this

describe DdModule::DbConnn do
  let!(:db_conn) do 
    DbModule::DbConn.new("hostname", "instance", "port", "user", "pass")
  end

  describe '#close_conn' do
    it 'closes the db connection' do    
      expect {db_conn.close_conn}.to change(db_conn, :is_conn?).from(true).to(false)
    end
  end
end

Upvotes: 1

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