(window.webpackJsonp=window.webpackJsonp||[]).push([[3395],{3803:function(t,s,a){"use strict";a.r(s);var n=a(31),e=Object(n.a)({},(function(){var t=this,s=t.$createElement,a=t._self._c||s;return a("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[a("h1",{attrs:{id:"unit-testing"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#unit-testing"}},[t._v("#")]),t._v(" Unit Testing")]),t._v(" "),a("h2",{attrs:{id:"tape"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#tape"}},[t._v("#")]),t._v(" tape")]),t._v(" "),a("p",[a("a",{attrs:{href:"https://github.com/substack/tape",target:"_blank",rel:"noopener noreferrer"}},[t._v("tape"),a("OutboundLink")],1),t._v(" is minimalistic JavaScript testing framework, it outputs "),a("a",{attrs:{href:"https://testanything.org/",target:"_blank",rel:"noopener noreferrer"}},[t._v("TAP-compliant"),a("OutboundLink")],1),t._v(" markup.")]),t._v(" "),a("p",[t._v("To install "),a("code",[t._v("tape")]),t._v(" using "),a("code",[t._v("npm")]),t._v(" run command")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("save"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("dev tape "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("types")])]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("tape\n\n")])])]),a("p",[t._v("To use "),a("code",[t._v("tape")]),t._v(" with Typescript you need to install "),a("code",[t._v("ts-node")]),t._v(" as global package, to do this run command")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("g ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("node\n\n")])])]),a("p",[t._v("Now you are ready to write your first test")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//math.test.ts")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("*")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("as")]),t._v(" test "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"tape"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("test")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Math test"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("t"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    t"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("equal")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("4")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    t"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token boolean"}},[t._v("true")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("5")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n    t"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("end")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[t._v("To execute test run command")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("node node_modules"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("tape"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("bin"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("tape math"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("test"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("ts\n\n")])])]),a("p",[t._v("In output you should see")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token constant"}},[t._v("TAP")]),t._v(" version "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("13")]),t._v("\n# Math test\nok "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),t._v(" should be equal\nok "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),t._v(" should be truthy\n\n"),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1.")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v(".2")]),t._v("\n# tests "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),t._v("\n# pass  "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),t._v("\n\n# ok\n\n")])])]),a("p",[t._v("Good job, you just ran your TypeScript test.")]),t._v(" "),a("p",[a("strong",[t._v("Run multiple test files")])]),t._v(" "),a("p",[t._v("You can run multiple test files at once using path wildcards.\nTo execute all Typescript tests in "),a("code",[t._v("tests")]),t._v(" directory run command")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("node node_modules"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("tape"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("bin"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("tape tests"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("/**/")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("*")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("ts\n\n")])])]),a("h2",{attrs:{id:"jest-ts-jest"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#jest-ts-jest"}},[t._v("#")]),t._v(" jest (ts-jest)")]),t._v(" "),a("p",[a("a",{attrs:{href:"https://facebook.github.io/jest/",target:"_blank",rel:"noopener noreferrer"}},[t._v("jest"),a("OutboundLink")],1),t._v(" is painless JavaScript testing framework by Facebook, with "),a("a",{attrs:{href:"https://www.npmjs.com/package/ts-jest",target:"_blank",rel:"noopener noreferrer"}},[t._v("ts-jest"),a("OutboundLink")],1),t._v(" can be used to test TypeScript code.")]),t._v(" "),a("p",[t._v("To install jest using npm run command")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("save"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("dev jest "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("types")])]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("jest ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("jest typescript\n\n")])])]),a("p",[t._v("For ease of use install "),a("code",[t._v("jest")]),t._v(" as global package")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("g jest\n\n")])])]),a("p",[t._v("To make "),a("code",[t._v("jest")]),t._v(" work with TypeScript you need to add configuration to "),a("code",[t._v("package.json")])]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//package.json")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("...")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"jest"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"transform"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n      "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('".(ts|tsx)"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"<rootDir>/node_modules/ts-jest/preprocessor.js"')]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"testRegex"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"(/__tests__/.*|\\\\.(test|spec))\\\\.(ts|tsx|js)$"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"moduleFileExtensions"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("[")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"ts"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"tsx"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"js"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("]")]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n")])])]),a("p",[t._v("Now "),a("code",[t._v("jest")]),t._v(" is ready.\nAssume we have sample fizz buz to test")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//fizzBuzz.ts")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("export")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("function")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fizzBuzz")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("number")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("string")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("let")]),t._v(" output "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('""')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("for")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("let")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("<=")]),t._v(" n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v(" i"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("++")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("if")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("%")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("5")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("&&")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("%")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n            output "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("' '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("if")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("%")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("===")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("0")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n            output "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'Fizz '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("if")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("i "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("%")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("5")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("===")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("0")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n            output "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("+=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'Buzz '")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("return")]),t._v(" output"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n")])])]),a("p",[t._v("Example test could look like")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token comment"}},[t._v("//FizzBuzz.test.ts")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[t._v('/// <reference types="jest" />')]),t._v("\n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("fizzBuzz"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"./fizzBuzz"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("test")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"FizzBuzz test"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fizzBuzz")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("toBe")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"1 2 "')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("fizzBuzz")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("toBe")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"1 2 Fizz "')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n")])])]),a("p",[t._v("To execute test run")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("jest\n\n")])])]),a("p",[t._v("In output you should see")]),t._v(" "),a("div",{staticClass:"language- extra-class"},[a("pre",{pre:!0,attrs:{class:"language-text"}},[a("code",[t._v("\nPASS  ./fizzBuzz.test.ts\n  ✓ FizzBuzz test (3ms)\n\nTest Suites: 1 passed, 1 total\nTests:       1 passed, 1 total\nSnapshots:   0 total\nTime:        1.46s, estimated 2s\nRan all test suites.\n\n")])])]),a("h3",{attrs:{id:"code-coverage"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#code-coverage"}},[t._v("#")]),t._v(" Code coverage")]),t._v(" "),a("p",[a("code",[t._v("jest")]),t._v(" supports generation of code coverage reports.")]),t._v(" "),a("p",[t._v("To use code coverage with TypeScript you need to add another configuration line to "),a("code",[t._v("package.json")]),t._v(".")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("...")]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"jest"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("...")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"testResultsProcessor"')]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"<rootDir>/node_modules/ts-jest/coverageprocessor.js"')]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n")])])]),a("p",[t._v("To run tests with generation of coverage report run")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("jest "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("coverage\n\n")])])]),a("p",[t._v("If used with our sample fizz buzz you should see")]),t._v(" "),a("div",{staticClass:"language- extra-class"},[a("pre",{pre:!0,attrs:{class:"language-text"}},[a("code",[t._v("\nPASS  ./fizzBuzz.test.ts\n  ✓ FizzBuzz test (3ms)\n\n-------------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------------|\nFile         |  % Stmts | % Branch |  % Funcs |  % Lines |Uncovered Lines |\n-------------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------------|\nAll files    |    92.31 |     87.5 |      100 |    91.67 |                |\n fizzBuzz.ts |    92.31 |     87.5 |      100 |    91.67 |             13 |\n-------------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------|---|---|---|---|---|---|---|---|---|-------------|\nTest Suites: 1 passed, 1 total\nTests:       1 passed, 1 total\nSnapshots:   0 total\nTime:        1.857s\nRan all test suites.\n\n")])])]),a("p",[a("code",[t._v("jest")]),t._v(" also created folder "),a("code",[t._v("coverage")]),t._v(" which contains coverage report in various formats, including user friendly html report in "),a("code",[t._v("coverage/lcov-report/index.html")])]),t._v(" "),a("p",[a("a",{attrs:{href:"https://i.stack.imgur.com/PtNG7.png",target:"_blank",rel:"noopener noreferrer"}},[a("img",{attrs:{src:"https://i.stack.imgur.com/PtNG7.png",alt:"jest html report"}}),a("OutboundLink")],1)]),t._v(" "),a("h2",{attrs:{id:"alsatian"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#alsatian"}},[t._v("#")]),t._v(" Alsatian")]),t._v(" "),a("p",[a("a",{attrs:{href:"https://github.com/alsatian-test/alsatian",target:"_blank",rel:"noopener noreferrer"}},[t._v("Alsatian"),a("OutboundLink")],1),t._v(" is a unit testing framework written in TypeScript. It allows for usage of Test Cases, and outputs "),a("a",{attrs:{href:"https://testanything.org/",target:"_blank",rel:"noopener noreferrer"}},[t._v("TAP-compliant"),a("OutboundLink")],1),t._v(" markup.")]),t._v(" "),a("p",[t._v("To use it, install it from "),a("code",[t._v("npm")]),t._v(":")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install alsatian "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("save"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("dev\n\n")])])]),a("p",[t._v("Then set up a test file:")]),t._v(" "),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" Expect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" Test"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" TestCase "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"alsatian"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v(" SomeModule "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"../src/some-module"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("    \n\n"),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("export")]),t._v(" SomeModuleTests "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n\n    "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("Test")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("public")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("statusShouldBeTrueByDefault")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("let")]),t._v(" instance "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("new")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("SomeModule")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        \n        "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("Expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("instance"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("status"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("toBe")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token boolean"}},[t._v("true")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n    \n    "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("Test")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"Name should be null by default"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("public")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("nameShouldBeNullByDefault")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("let")]),t._v(" instance "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("new")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("SomeModule")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        \n        "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("Expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("instance"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("name"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("toBe")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("null")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n    \n    "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("TestCase")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"first name"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("TestCase")])]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v('"apples"')]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("public")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("shouldSetNameCorrectly")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("name"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token builtin"}},[t._v("string")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("let")]),t._v(" instance "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("new")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("SomeModule")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        \n        instance"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("setName")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("name"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n        \n        "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("Expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("instance"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("name"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("toBe")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("name"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n    \n"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v("\n\n")])])]),a("p",[t._v("For a full documentation, see "),a("a",{attrs:{href:"https://github.com/alsatian-test/alsatian",target:"_blank",rel:"noopener noreferrer"}},[t._v("alsatian's GitHub repo"),a("OutboundLink")],1),t._v(".")]),t._v(" "),a("h2",{attrs:{id:"chai-immutable-plugin"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#chai-immutable-plugin"}},[t._v("#")]),t._v(" chai-immutable plugin")]),t._v(" "),a("li",[t._v("\nInstall from npm chai, chai-immutable, and ts-node\n"),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("save"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("dev chai chai"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("immutable ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("node\n\n")])])])]),t._v(" "),a("li",[t._v("\nInstall types for mocha and chai\n"),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("npm install "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("save"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("dev "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("types")])]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("mocha "),a("span",{pre:!0,attrs:{class:"token decorator"}},[a("span",{pre:!0,attrs:{class:"token at operator"}},[t._v("@")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("types")])]),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("chai\n\n")])])])]),t._v(" "),a("li",[t._v("\nWrite simple test file:\n"),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("List"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" Set"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'immutable'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("*")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("as")]),t._v(" chai "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'chai'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("*")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("as")]),t._v(" chaiImmutable "),a("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("from")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'chai-immutable'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n  chai"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("use")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("chaiImmutable"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n  "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("describe")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'chai immutable example'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("it")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'example'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=>")]),t._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n      "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("Set"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("of")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("to"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("not"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("be"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("empty"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n\n      "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("Set"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("of")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("to"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("include")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n      "),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("expect")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),t._v("Set"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("of")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("3")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("to"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[t._v("include")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),a("span",{pre:!0,attrs:{class:"token number"}},[t._v("5")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(";")]),t._v("\n    "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n  "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(")")]),t._v("\n\n")])])])]),t._v(" "),a("li",[t._v("\nRun it in the console:\n"),a("div",{staticClass:"language-ts extra-class"},[a("pre",{pre:!0,attrs:{class:"language-ts"}},[a("code",[t._v("mocha "),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("--")]),t._v("compilers ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v("ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("node"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("register"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("tsx"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v(":")]),t._v("ts"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("-")]),t._v("node"),a("span",{pre:!0,attrs:{class:"token operator"}},[t._v("/")]),t._v("register "),a("span",{pre:!0,attrs:{class:"token string"}},[t._v("'test/**/*.spec.@(ts|tsx)'")]),t._v("\n\n")])])])])])}),[],!1,null,null,null);s.default=e.exports}}]);