teevi

2.2.4 • Public • Published

Teevi

Tired of installing 1000 dependencies, just to run unit tests? Teevi is the essence of unit testing in JavaScript.

It allows unit testing of JS without additional dependencies, right in your browser. Teevi has almost the same syntax as Mocha with Chai but is a hundred times smaller.

Demo: http://shaack.com/projekte/teevi/test/

Usage

  1. Create the test script MyTest.js
import {describe, it, assert} from "../src/teevi.js";

describe("Teevi test demo", () => {
    it("will not fail", () => {
        assert.true(2 * 2 === 4)
    })
    it("will fail", () => {
        assert.equals(4 + 2, 42)
    })
})
  1. Create a test/index.html to run the tests in your browser
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Tests</title>
</head>
<body>
<script type="module">
    import {teevi} from "./src/teevi.js"
    import "./MyTest.js"
    teevi.run()
</script>
</body>
</html>

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it.only

Use it.only(condition, testMethod) to run only these tests in your test module.

possible assertions

  • assert.fail(message = DEFAULT_MESSAGE)
  • assert.true(message = DEFAULT_MESSAGE)
  • assert.false(message = DEFAULT_MESSAGE)
  • equal(actual, expected, message = DEFAULT_MESSAGE)
  • notEqual(actual, notExpected, message = DEFAULT_MESSAGE)
  • use reject(message) from an async Promise (see example below)

Testing async calls

You can also test async calls, with the use of promises.

it("should test async", () => {
    return new Promise((resolve) => {
        setTimeout(() => {
            // `resolve`, if test succeeds
            resolve()
        }, 500)
    })
})
it("should fail async", () => {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            // in Promises use `reject()`, not `assert`
            reject("failed, because of testing")
        }, 500)
    })
})

Package Sidebar

Install

npm i teevi

Weekly Downloads

11

Version

2.2.4

License

MIT

Unpacked Size

8.06 kB

Total Files

6

Last publish

Collaborators

  • shaack