cheatsheets/minitest.md

title: Minitest

Usage

require 'minitest/autorun'

describe "X" do
  before do .. end
  after do .. end
  subject { .. }
  let(:list) { Array.new }

  it "should work" do
    assert true
  end
end

Specs

.must_equal b
.must_be_close_to 2.99999
.must_be_same_as b

.must_include needle
.must_be_empty

.must_be_kind_of
.must_be_instance_of
.must_be_nil
.must_match /regex/
.must_be :<=, 42
.must_respond_to msg

.must_be_silent  ( proc { "no stdout or stderr" }.must_be_silent)
.must_output "hi"

proc { ... }.must_output out_or_nil [, err]
proc { ... }.must_raise exception
proc { ... }.must_throw sym

Wont is the inverse of must:

a.must_equal b
a.wont_equal b