AlexVPopov

clojure.spec cheat sheet

Specs

Require

(ns my.ns
  (:require [clojure.spec.alpha :as s]))

AlexVPopov

Keybase proof

I hereby claim:

• I am alexvpopov on github.
• I am derpov (https://keybase.io/derpov) on keybase.
• I have a public key ASCANeJV2M9hCMm5heFiuNcMzx9XDJGwsH2yuH710eN-qwo

To claim this, I am signing this object:

AlexVPopov

Failures:

  1) Ruby2D::Image#contains? returns true if point is inside image
     Failure/Error: ext_init(@path)

     NoMethodError:
       undefined method `ext_init' for #<Ruby2D::Image:0x007fbbaaa08c60>
     # ./lib/ruby2d/image.rb:27:in `initialize'
     # ./test/image_spec.rb:13:in `new'
     # ./test/image_spec.rb:13:in `block (3 levels) in <top (required)>'

AlexVPopov

RSpec.describe Person do
  let(:person) { described_class.new('Fixed', 'Name', education_level, educator) }

  describe '#educate' do
    let(:education_level) { 2 }
    let(:educator) { instance_double('PersonEducator') }
    let(:updated_education_level) { education_level + 1 }
    
    subject { person.education_level }

AlexVPopov

def read_price(selector)
  elmenent = $driver.find_element(id: selector)
rescue Selenium::WebDriver::Error::NoSuchElementError
    "Euer Return-wert"
else
  return elmenent.attribute("value").to_s if elmenent == "NUM_HR_VSU"

  elmenent.text().gsub(' €', '').gsub(',', '.')
end

AlexVPopov

# User.joins(accounts: :broker_server)
SELECT "users".* 
FROM "users" 
INNER JOIN "broker_accounts" 
        ON "broker_accounts"."user_id" = "users"."id" 
       AND "broker_accounts"."state" IN ('new', 'active', 'inactive', 'disabled', 'out-of-money') 
INNER JOIN "broker_servers" 
        ON "broker_servers"."id" = "broker_accounts"."broker_server_id" 
WHERE "users"."active" = 't' 

AlexVPopov

Let's say you have the following models:

class Admin < ActiveRecord::Base
  has_one :login, as: :loginable
end

class User < ActiveRecord::Base
  has_one :login, as: :loginable
end

AlexVPopov

#!/usr/bin/env bash

uninstall() {
  list=`gem list --no-versions`
  for gem in $list; do
    gem uninstall $gem -aIx
  done
  gem list
  gem install bundler
}

AlexVPopov

__foo__ = "This foo sentence contains many foo instances, for example: foo, foo, foo."

* Match a single symbol: `foo.match /./ # => #<MatchData "T">`
* Match the first-found word character symbol: `foo.match /\w/ => #<MatchData "T">`
* Extract all symbols of a string: `foo.scan /./ # => ["T",
 "h",
 "i",
 "s",
 " ",
 "f",

AlexVPopov

require 'spec_helper'

ivan   = Student.new 'Иван', 10, :second
mariya = Student.new 'Мария', 12, :first
neycho = Student.new 'Нейчо', 9, :third

students = [ivan, mariya, neycho]

describe "Array#to_proc" do
  it "works for a single element" do