Intro to RSpec

tl;dr

Helpful link for rails testing here.

Ensure rspec gem installed.

# calculator.rb
class Calculator
  def add(x, y)
    x + y
  end
end

# calculator_spec.rb
require './calculator.rb'

describe "calculator" do
  it "adds numbers" do
    calc = Calculator.new
    expect(calc.add(2,3)).to eql(5)
  end
end
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Run rspec calculator_spec.rb.

Setting up a calculator file

# calculator.rb
class Calculator
  def add(x, y)
    x + y
  end
end
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Pending tests

require './calculator.rb'

describe "calculator" do
  it "adds numbers"
end
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Running rspec calculator_spec.rb should come back with 1 pending test.

Adding your first test

require './calculator.rb'

describe "calculator" do
  it "adds numbers" do
    calc = Calculator.new
    expect(calc.add(2,3)).to eql(5)
  end
end
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Running rspec calculator_spec.rb should come back with 1 successful test.

Module testing a Ruby Symbol

# flags.rb
module Flags
  Truthy = :truthy
end

# flags_spec.rb
require './flags.rb'

describe 'for flag module' do
  context 'when ruby symbol is involved' do
    subject { Flags::Truthy }
    it { expect(subject).to eq(:truthy)}
  end
end
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rspec flags_spec.rb