In my test app, which uses test::unit, I need to start by pulling a bunch of data from various sources. I'd like to only do this once - the data is only read, not written, and doesn't change between tests, and the loading (and error checking for the loading), takes some time.
There are values that I DO want reset every time, and those are easy enough, but what if I want persistant accessible values? What's the best way to do this?
I'm especially interested in solutions that would let my push those assignments to some module that can be included in all my tests, since they all need access to this data.
Why do you need it inside the test? You could define it gloabl:
gem 'test-unit'#, '>= 2.1.1' #startup
require 'test/unit'
GLOBAL_DATA = 11
class My_Tests < Test::Unit::TestCase
def test_1()
puts "Testing startup 1"
assert_equal(11, GLOBAL_DATA)
end
end
GLOBAL_DATA could be a (singleton)-class (respective an instance).
If you have only one testclass, you may use TestCase.startup:
gem 'test-unit'#, '>= 2.1.1' #startup
require 'test/unit'
class My_Tests < Test::Unit::TestCase
def self.startup
puts "Define global_data "
##global_data = 11
end
def test_1()
puts "Testing 1"
assert_equal(11, ##global_data = 11)
end
def test_2()
puts "Testing 2"
assert_equal(11, ##global_data = 11)
end
end
You can just put them at the top of the class. They will get executed, and then your tests will get executed.
You could do this in the setup method:
def setup
if !defined?(##initial_data)
# Whatever you need to do to get your initial data
##initial_data = foo
end
#other_data = bar
end
Related
I'm just starting a small project to emulate a Carnival's ticket sales booth and one of the guidelines was to test that a user can enter the number of tickets. The program runs in the console and I eventually (hopefully) figured it out how to implement this test thanks to #Stefan's answer on this question.
The problem is that now, when I run the test file, minitest says:
0 runs, 0 assertions, 0 failures, 0 errors, 0 skips
I get the same result when I try to run the test by name using ruby path/to/test/file.rb --name method-name. I'm not sure if this is because my code is still faulty of if it's because I've set up minitest incorrectly. I've tried to look up similar problems on SO but most questions seem to involve using minitest with rails and I just have a plain ruby project.
Here's my test file:
gem 'minitest', '>= 5.0.0'
require 'minitest/spec'
require 'minitest/autorun'
require_relative 'carnival'
class CarnivalTest < MiniTest::Test
def sample
assert_equal(1, 1)
end
def user_can_enter_number_of_tickets
with_stdin do |user|
user.puts "2"
assert_equal(Carnival.new.get_value, "2")
end
end
def with_stdin
stdin = $stdin # global var to remember $stdin
$stdin, write = IO.pipe # assign 'read end' of pipe to $stdin
yield write # pass 'write end' to block
ensure
write.close # close pipe
$stdin = stdin # restore $stdin
end
end
In a file called carnival.rb in the same folder as my test file I have
Class Carnival
def get_value
gets.chomp
end
end
If anyone can help figure out why the test is not running I'd be grateful!
By convention, tests in Minitest are public instance methods that start with test_, so the original test has no actual test methods. You need to update your test class so that the methods with assertions follow the convention as:
class CarnivalTest < Minitest::Test
def test_sample
assert_equal(1, 1)
end
def test_user_can_enter_number_of_tickets
with_stdin do |user|
user.puts "2"
assert_equal(Carnival.new.get_value, "2")
end
end
# snip...
end
Yeah always start all your tests with test_ so it knows that you want to that function/method
class CarnivalTest < MiniTest::Test
def test_sample
assert_equal(1, 1)
end
def test_user_can_enter_number_of_tickets
with_stdin do |user|
user.puts "2"
assert_equal(Carnival.new.get_value, "2")
end
end
and that should work for you
I often build little single-purpose Ruby scripts like this:
#!/usr/bin/env ruby
class Widget
def end_data
DATA.read
end
def render_data source_data
source_data.upcase
end
end
w = Widget.new
puts w.render_data(w.end_data)
__END__
data set to work on.
I'd like to include RSpec tests directly inside the file while I'm working on it. Something like this (which doesn't work but illustrates what I'm trying to do):
#!/usr/bin/env ruby
class Widget
def end_data
DATA.read
end
def render_data source_data
source_data.upcase
end
def self_test
# This doesn't work but shows what I'm trying to
# accomplish. The goal is to have RSpec run these type
# of test when self_test is called.
describe "Widget" do
it "should render data properly" do
#w = Widget.new
expect(#w.render_data('test string')).to eq 'TEST STRING'
end
end
end
end
w = Widget.new
w.self_test
__END__
data set to work on.
I understand this is not the normal way to work with RSpec and isn't appropriate in most cases. That said, there are times when it would be nice. So, I'd like to know, is it possible?
There are two things. First off rspec by default won't pollute the global namespace with methods like describe and so on. The second thing is that you need to tell rspec to run the specs after they've been declared.
If you change your self_test method to be
RSpec.describe "Widget" do
it "should render data properly" do
#w = Widget.new
expect(#w.render_data('test string')).to eq 'TEST STRING'
end
end
RSpec::Core::Runner.invoke
(having of course done require 'rspec' then that will run your specs).
The invoke methods exits the process after running the specs. If you don't want to do that, or need more control over where output goes etc. you might want to drop down to the run method which allows you to control these things.
I've got an interesting conundrum. I'm in the midst of developing a library to parse PSDs in Ruby. Also, a buddy is simultaneously working on a library to parse PSDs in JavaScript. We would like to share the same unit tests via a git submodule.
We've decided to use a simple JSON DSL to define each test. A single test might look like:
{
"_name": "Layer should render out",
"_file": "test/fixtures/layer_out.psd",
"_exports_to": "test/controls/layer_out_control.png"
}
So, now it's up to us to build the appropriate test harnesses to translate the JSON into the appropriate native unit tests. I've been using MiniTest to get myself up to speed, but I'm running into a few walls.
Here's what I've got so far. The test harness is named TargetPractice for the time being:
# run_target_practice.rb
require 'target_practice'
TargetPractice.new(:test) do |test|
test.pattern = "test/**/*.json"
end
and
# psd_test.rb
class PSDTest < MiniTest::Unit::TestCase
attr_accessor :data
def tests_against_data
# do some assertions
end
end
and
# target_practice.rb
class TargetPractice
attr_accessor :libs, :pattern
def initialize(sym)
#libs = []
#pattern = ""
yield self
run_tests
end
def run_tests
FileList[#pattern].to_a.each do |file|
test_data = JSON.parse(File.open(file).read)
test = PSDTest.new(test_data["_name"]) do |t|
t.data = test_data
end
end
end
end
Unfortunately, I'm having trouble getting a yield in the initialize to stick in my PSDTest class. Also, it appears that a test will run immediately on initialization.
I would like to dynamically create a few MiniTest::Unit::TestCase objects, set their appropriate data properties and then run the tests. Any pointers are appreciated!
I think you are overcomplicating things a bit here. What you need is a parameterized test, which is pretty trivial to implement using mintest/spec:
describe "PSD converter" do
def self.tests(pattern = 'test/**/*.json')
FileList[pattern].map{|file| JSON.parse(File.read(file))}
end
tests.each do |test|
it "satisfies test: " + test["_name"] do
# some assertions using test["_file"] and test["_exports_to"]
end
end
end
I'm trying to define a few let's and before hooks that will run globally for all my specs by including them in a separate file using the Rspec configuration block.
I tried something like:
module Helpers
def self.included(base)
base.let(:x){ "x" }
base.before(:all){ puts "x: #{x}" }
end
end
Rspec.configure{|c| c.include Helpers }
but this doesn't work as expected. The before(:all) doesn't just run before each main example group, but each nested one as well.
Then I found out about shared_context and it appears to be exactly what I want.
My open problem however is that I can't figure out how to share a context amongst ALL of my specs. The docs only reference include_context within a specific spec.
Can anyone tell me how I can achieve this behavior in a global manner? I'm aware that I can define global before hooks in my spec_helper but I can't seem to use let. I'd like a single place that I can define both of these things and not pollute my spec helper, but just include it instead.
I tried to reproduce your error, but failed.
# spec_helper.rb
require 'support/global_helpers'
RSpec.configure do |config|
config.include MyApp::GlobalHelpers
end
# support/global_helpers.rb
module MyApp
module GlobalHelpers
def self.included(base)
base.let(:beer) { :good }
base.before(:all) { #bottles = 10 }
end
end
end
# beer_spec.rb
require 'spec_helper'
describe "Brewery" do
it "makes good stuff" do
beer.should be :good
end
it "makes not too much bottles" do
#bottles.should == 10
end
context "when tasting beer" do
before(:all) do
#bottles -= 1
end
it "still produces good stuff" do
beer.should be :good
end
it "spends some beer on degusting" do
#bottles.should == 9
end
end
end
https://gist.github.com/2283634
When I wrote something like base.before(:all) { p 'global before'; #bottles = 10 }, I got exactly one line in spec output.
Notice that I didn't try to modify instance variables inside an example, because it wouldn't work anyway (well, actually you can modify instance variables, if it's a hash or array). Moreover, even if you change before(:all) in nested example group to before(:each), there will be still 9 bottles in each example.
I know. This is discouraged. For reasons I won't get into, I need to run my tests in the order they are written. According to the documentation, if my test class (we'll call it TestClass) extends Minitest::Unit::TestCase, then I should be able to call the public method i_suck_and_my_tests_are_order_dependent! (Gee - do you think the guy who created Minitest had an opinion on that one?). Additionally, there is also the option of calling a method called test_order and specifying :alpha to override the default behavior of :random. Neither of these are working for me.
Here's an example:
class TestClass < Minitest::Unit::TestCase
#override random test run ordering
i_suck_and_my_tests_are_order_dependent!
def setup
...setup code
end
def teardown
...teardown code
end
def test_1
test_1 code....
assert(stuff to assert here, etc...)
puts 'test_1'
end
def test_2
test_2_code
assert(stuff to assert here, etc...)
puts 'test_2'
end
end
When I run this, I get:
undefined method `i_suck_and_my_tests_are_order_dependent!' for TestClass:Class (NoMethodError)
If I replace the i_suck method call with a method at the top a la:
def test_order
:alpha
end
My test runs, but I can tell from the puts for each method that things are still running in random order each time I run the tests.
Does anyone know what I'm doing wrong?
Thanks.
If you just add test_order: alpha to your test class, the tests will run in order:
class TestHomePage
def self.test_order
:alpha
end
def test_a
puts "a"
end
def test_b
puts "b"
end
end
Note that, as of minitest 5.10.1, the i_suck_and_my_tests_are_order_dependent! method/directive is completely nonfunctional in test suites using MiniTest::Spec syntax. The Minitest.test_order method is apparently not being called at all.
EDIT: This has been a known issue since Minitest 5.3.4: see seattlerb/minitest#514 for the blow-by-blow wailing and preening.
You and I aren't the ones who "suck". What's needed is a BDD specification tool for Ruby without the bloat of RSpec and without the frat-boy attitude and contempt for wider community practices of MiniTest. Does anyone have any pointers?
i_suck_and_my_tests_are_order_dependent! may be a later addition to minitest & not available as a Ruby core method. In that case, you'd want to force use of your gem version:
require 'rubygems'
gem 'minitest'
I think that the method *test_order* should be a class method and not a instance method like so:
# tests are order dependent
def self.test_order
:alpha
end
The best way to interfere in this chain may be to override a class method runnable_methods:
def self.runnable_methods
['run_first'] | super | ['run_last']
end
#Minitest version:
def self.runnable_methods
methods = methods_matching(/^test_/)
case self.test_order
when :random, :parallel then
max = methods.size
methods.sort.sort_by { rand max }
when :alpha, :sorted then
methods.sort
else
raise "Unknown test_order: #{self.test_order.inspect}"
end
end
You can reorder test any suitable way around. If you define your special ordered tests with
test 'some special ordered test' do
end
, don't forget to remove them from the results of super call.
In my example I need to be sure only in one particular test to run last, so I keep random order on whole suite and place 'run_last' at the end of it.