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341 lines
10 KiB
Text
341 lines
10 KiB
Text
= minitest/{unit,spec,mock,benchmark}
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home :: https://github.com/seattlerb/minitest
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rdoc :: http://docs.seattlerb.org/minitest
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vim :: https://github.com/sunaku/vim-ruby-minitest
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== DESCRIPTION:
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minitest provides a complete suite of testing facilities supporting
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TDD, BDD, mocking, and benchmarking.
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"I had a class with Jim Weirich on testing last week and we were
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allowed to choose our testing frameworks. Kirk Haines and I were
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paired up and we cracked open the code for a few test
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frameworks...
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I MUST say that minitest is *very* readable / understandable
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compared to the 'other two' options we looked at. Nicely done and
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thank you for helping us keep our mental sanity."
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-- Wayne E. Seguin
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minitest/unit is a small and incredibly fast unit testing framework.
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It provides a rich set of assertions to make your tests clean and
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readable.
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minitest/spec is a functionally complete spec engine. It hooks onto
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minitest/unit and seamlessly bridges test assertions over to spec
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expectations.
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minitest/benchmark is an awesome way to assert the performance of your
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algorithms in a repeatable manner. Now you can assert that your newb
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co-worker doesn't replace your linear algorithm with an exponential
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one!
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minitest/mock by Steven Baker, is a beautifully tiny mock (and stub)
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object framework.
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minitest/pride shows pride in testing and adds coloring to your test
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output. I guess it is an example of how to write IO pipes too. :P
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minitest/unit is meant to have a clean implementation for language
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implementors that need a minimal set of methods to bootstrap a working
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test suite. For example, there is no magic involved for test-case
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discovery.
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"Again, I can't praise enough the idea of a testing/specing
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framework that I can actually read in full in one sitting!"
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-- Piotr Szotkowski
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== FEATURES/PROBLEMS:
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* minitest/autorun - the easy and explicit way to run all your tests.
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* minitest/unit - a very fast, simple, and clean test system.
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* minitest/spec - a very fast, simple, and clean spec system.
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* minitest/mock - a simple and clean mock/stub system.
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* minitest/benchmark - an awesome way to assert your algorithm's performance.
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* minitest/pride - show your pride in testing!
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* Incredibly small and fast runner, but no bells and whistles.
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== RATIONALE:
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See design_rationale.rb to see how specs and tests work in minitest.
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== SYNOPSIS:
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Given that you'd like to test the following class:
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class Meme
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def i_can_has_cheezburger?
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"OHAI!"
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end
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def will_it_blend?
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"YES!"
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end
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end
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=== Unit tests
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require 'minitest/autorun'
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class TestMeme < MiniTest::Unit::TestCase
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def setup
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@meme = Meme.new
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end
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def test_that_kitty_can_eat
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assert_equal "OHAI!", @meme.i_can_has_cheezburger?
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end
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def test_that_it_will_not_blend
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refute_match /^no/i, @meme.will_it_blend?
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end
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end
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=== Specs
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require 'minitest/autorun'
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describe Meme do
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before do
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@meme = Meme.new
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end
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describe "when asked about cheeseburgers" do
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it "must respond positively" do
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@meme.i_can_has_cheezburger?.must_equal "OHAI!"
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end
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end
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describe "when asked about blending possibilities" do
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it "won't say no" do
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@meme.will_it_blend?.wont_match /^no/i
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end
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end
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end
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For matchers support check out:
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https://github.com/zenspider/minitest-matchers
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=== Benchmarks
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Add benchmarks to your regular unit tests. If the unit tests fail, the
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benchmarks won't run.
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# optionally run benchmarks, good for CI-only work!
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require 'minitest/benchmark' if ENV["BENCH"]
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class TestMeme < MiniTest::Unit::TestCase
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# Override self.bench_range or default range is [1, 10, 100, 1_000, 10_000]
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def bench_my_algorithm
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assert_performance_linear 0.9999 do |n| # n is a range value
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@obj.my_algorithm(n)
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end
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end
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end
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Or add them to your specs. If you make benchmarks optional, you'll
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need to wrap your benchmarks in a conditional since the methods won't
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be defined.
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describe Meme do
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if ENV["BENCH"] then
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bench_performance_linear "my_algorithm", 0.9999 do |n|
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100.times do
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@obj.my_algorithm(n)
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end
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end
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end
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end
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outputs something like:
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# Running benchmarks:
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TestBlah 100 1000 10000
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bench_my_algorithm 0.006167 0.079279 0.786993
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bench_other_algorithm 0.061679 0.792797 7.869932
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Output is tab-delimited to make it easy to paste into a spreadsheet.
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=== Mocks
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class MemeAsker
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def initialize(meme)
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@meme = meme
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end
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def ask(question)
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method = question.tr(" ","_") + "?"
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@meme.__send__(method)
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end
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end
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require 'minitest/autorun'
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describe MemeAsker do
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before do
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@meme = MiniTest::Mock.new
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@meme_asker = MemeAsker.new @meme
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end
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describe "#ask" do
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describe "when passed an unpunctuated question" do
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it "should invoke the appropriate predicate method on the meme" do
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@meme.expect :will_it_blend?, :return_value
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@meme_asker.ask "will it blend"
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@meme.verify
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end
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end
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end
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end
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=== Stubs
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def test_stale_eh
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obj_under_test = Something.new
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refute obj_under_test.stale?
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Time.stub :now, Time.at(0) do # stub goes away once the block is done
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assert obj_under_test.stale?
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end
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end
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=== Customizable Test Runner Types:
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MiniTest::Unit.runner=(runner) provides an easy way of creating custom
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test runners for specialized needs. Justin Weiss provides the
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following real-world example to create an alternative to regular
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fixture loading:
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class MiniTestWithHooks::Unit < MiniTest::Unit
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def before_suites
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end
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def after_suites
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end
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def _run_suites(suites, type)
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begin
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before_suites
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super(suites, type)
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ensure
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after_suites
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end
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end
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def _run_suite(suite, type)
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begin
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suite.before_suite
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super(suite, type)
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ensure
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suite.after_suite
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end
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end
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end
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module MiniTestWithTransactions
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class Unit < MiniTestWithHooks::Unit
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include TestSetupHelper
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def before_suites
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super
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setup_nested_transactions
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# load any data we want available for all tests
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end
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def after_suites
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teardown_nested_transactions
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super
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end
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end
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end
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MiniTest::Unit.runner = MiniTestWithTransactions::Unit.new
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== Known Extensions:
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minitest-capistrano :: Assertions and expectations for testing Capistrano recipes
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minitest-capybara :: Capybara matchers support for minitest unit and spec
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minitest-chef-handler :: Run Minitest suites as Chef report handlers
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minitest-ci :: CI reporter plugin for MiniTest.
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minitest-colorize :: Colorize MiniTest output and show failing tests instantly.
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minitest-context :: Defines contexts for code reuse in MiniTest
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specs that share common expectations.
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minitest-debugger :: Wraps assert so failed assertions drop into
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the ruby debugger.
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minitest-display :: Patches MiniTest to allow for an easily configurable output.
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minitest-emoji :: Print out emoji for your test passes, fails, and skips.
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minitest-excludes :: Clean API for excluding certain tests you
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don't want to run under certain conditions.
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minitest-firemock :: Makes your MiniTest mocks more resilient.
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minitest-growl :: Test notifier for minitest via growl.
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minitest-instrument :: Instrument ActiveSupport::Notifications when
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test method is executed
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minitest-instrument-db :: Store information about speed of test
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execution provided by minitest-instrument in database
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minitest-libnotify :: Test notifier for minitest via libnotify.
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minitest-macruby :: Provides extensions to minitest for macruby UI testing.
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minitest-matchers :: Adds support for RSpec-style matchers to minitest.
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minitest-metadata :: Annotate tests with metadata (key-value).
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minitest-mongoid :: Mongoid assertion matchers for MiniTest
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minitest-must_not :: Provides must_not as an alias for wont in MiniTest
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minitest-predicates :: Adds support for .predicate? methods
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minitest-pry :: A minitest plugin to drop into pry on assertion failure.
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minitest-rails :: MiniTest integration for Rails 3.1.
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minitest-reporters :: Create customizable MiniTest output formats
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minitest-rg :: redgreen minitest
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minitest-spec-magic :: Minitest::Spec extensions for Rails and beyond
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minitest-tags :: add tags for minitest
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minitest-wscolor :: Yet another test colorizer.
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minitest_owrapper :: Get tests results as a TestResult object.
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minitest_should :: Shoulda style syntax for minitest test::unit.
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minitest_tu_shim :: minitest_tu_shim bridges between test/unit and minitest.
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mongoid-minitest :: MiniTest matchers for Mongoid.
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== REQUIREMENTS:
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* Ruby 1.8, maybe even 1.6 or lower. No magic is involved.
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== INSTALL:
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sudo gem install minitest
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On 1.9, you already have it. To get newer candy you can still install
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the gem, but you'll need to activate the gem explicitly to use it:
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require 'rubygems'
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gem 'minitest' # ensures you're using the gem, and not the built in MT
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require 'minitest/autorun'
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# ... usual testing stuffs ...
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== LICENSE:
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(The MIT License)
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Copyright (c) Ryan Davis, seattle.rb
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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'Software'), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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