use must for positive expectations and wont for negative expectations.
- must_be | list.size.must_be :==, 0
- must_be_close_to | subject.size.must_be_close_to 1,1
- must_be_empty | list.must_be_empty
- must_be_instance_of | list.must_be_instance_of Array
- must_be_kind_of | list.must_be_kind_of Enumerable
- must_be_nil | list.first.must_be_nil
- must_be_same_as | subject.must_be_same_as subject
- must_be_silent | proc { "no stdout or stderr" }.must_be_silent
- must_be_within_epsilon | subject.size.must_be_within_epsilon 1,1
- must_equal | subject.size.must_equal 2
- must_include | subject.must_include "skinny jeans"
- must_match | subject.first.must_match /silly/
- must_output proc |{ print "#{subject.size}!" }.must_output "2!"
- must_respond_to | subject.must_respond_to :count
- must_raise | proc { subject.foo }.must_raise NoMethodError
- must_send | subject.must_send [subject, :values_at, 0]
- must_throw | proc { throw :done if subject.any? }.must_throw :done
require 'minitest/autorun'
describe Hipster, "Demonstration of MiniTest" do
before do
@hipster = Hipster.new
end
after do
@hipster.destroy!
end
subject do
Array.new.tap do |attributes|
attributes << "silly hats"
attributes << "skinny jeans"
end
end
let(:list) { Array.new }
describe "when asked about the font" do
it "should be helvetica" do
@hipster.preferred_font.must_equal "helvetica"
end
end
describe "when asked about mainstream" do
it "won't be mainstream" do
@hipster.mainstream?.wont_equal true
end
end
end
use assert for positive assertions and refute for negative assertions
- assert | assert @subject.any?, "empty subjects"
- assert_block | assert_block { @subject.any? }
- assert_empty | assert_empty @list
- assert_equal | assert_equal 2, @subject.size
- assert_in_delta | assert_in_delta @subject.size, 1,1
- assert_in_epsilon | assert_in_epsilon @subject.size, 1, 1
- assert_includes | assert_includes @subject, "skinny jeans"
- assert_instance_of | assert_instance_of Array, @list
- assert_kind_of | assert_kind_of Enumerable, @list
- assert_match | assert_match @subject.first, /silly/
- assert_nil | assert_nil @list.first
- assert_operator | assert_operator @list.size, :== , 0
- assert_output | assert_output("Size: 2") { print "Size: #{@subject.size}"}
- assert_raises | assert_raises(NoMethodError) { @subject.foo }
- assert_respond_to | assert_respond_to @subject, :count
- assert_same | assert_same @subject, @subject, "It's the same object silly"
- assert_send | assert_send [@subject, :values_at, 0]
- assert_silent | assert_silent { "no stdout or stderr" }
- assert_throws | assert_throws(:error,'is empty') {throw :error if @subject.any?}
require 'minitest/autorun'
class TestHipster < MiniTest::Unit::TestCase
def setup
@hipster = Hipster.new
@list = Array.new
@subject = ["silly hats", "skinny jeans"]
end
def teardown
@hipster.destroy!
end
def test_for_helvetica_font
assert_equal "helvetica!", @hipster.preferred_font
end
def test_not_mainstream
refute @hipster.mainstream?
end
end
there two essential methods at our disposal: expect and verify
require 'minitest/autorun'
class Twipster
def initialize(twitter)
# A Ruby wrapper for the Twitter API
@twitter = twitter
end
def submit(tweet)
@twitter.update("#{tweet} #lolhipster")
end
end
describe Twipster, "Make every tweet a hipster tweet." do
before do
@twitter = MiniTest::Mock.new
@twipster = Twipster.new(@twitter)
end
it "should append a #lolhipster hashtag and update Twitter with our status" do
tweet = "Skyrim? Too mainstream."
@twitter.expect :update, true, ["#{tweet} #lolhipster"]
@twipster.submit(tweet)
assert @twitter.verify # verifies tweet and hashtag was passed to `@twitter.update`
end
end
This is slightly modified version of @mattsears's article http://mattsears.com/articles/2011/12/10/minitest-quick-reference/ just in case,if some servers stop working :)
Thank you so much.