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Jasmine

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The syntax of Jasmine is identical to that of Jest.

Use Jasmine locally:


> npm install --save-dev jasmine> npx jasmine init> npx jasmine examples> npm test> npx jasmine singleFile.js

or globally:


> npm i -g jasmine> jasmine init> jasmine examples> jasmine> jasmine singleFile.js

where:


// package.json//…"scripts": {
  "test": "mocha"}

Customize spec/support/jasmine.jsonspec/support/jasmine.json spec/support/jasmine.json to enumerate the source files and spec files you would like the Jasmine runner to include. You may use dir glob strings.


{
  /* Spec directory path relative to the current working dir when jasmine is executed. */
  "spec_dir": "spec",
  /* Array of filepaths (and globs) relative to spec_dir to include and exclude */
  "spec_files": [
    "**/*[sS]pec.js",
    "!**/*nospec.js"
  ],
  /* Array of filepaths (and globs) relative to spec_dir to include before jasmine specs */
  "helpers": [
    "helpers/**/*.js"
  ],
  /* Stop execution of a spec after the first expectation failure in it */
  "stopSpecOnExpectationFailure": false,
  /* Run specs in semi-random order */
  "random": false}
Jasmine calls it() instead of test() to conduct tests. A 'spy' can be used to stub any function and track calls to it and all arguments. The Jasmine Clock is used to test time-dependent code.
describe("A suite", function() {
   var value=0;
   it("contains spec with an expectation", function() {
      expect(true).toBe(true);
   });
   it("should support async execution of test preparation and expectations", function(done) {
      value++;
      expect(value).toBeGreaterThan(0);
      done();
   });
   beforeEach(function() {
      timerCallback = jasmine.createSpy("timerCallback");
      jasmine.clock().install();
   });
   afterEach(function() {
      jasmine.clock().uninstall();
    });
    it("causes a timeout to be called synchronously", function() {
       setTimeout(function() {
          timerCallback();
       }, 100);
       expect(timerCallback).not.toHaveBeenCalled();
       jasmine.clock().tick(101);
       expect(timerCallback).toHaveBeenCalled();
   });
   it("causes an interval to be called synchronously", function() {
      setInterval(function() {
         timerCallback();
      }, 100);
      expect(timerCallback).not.toHaveBeenCalled();
      jasmine.clock().tick(101);
      expect(timerCallback.calls.count()).toEqual(1);
      jasmine.clock().tick(50);
      expect(timerCallback.calls.count()).toEqual(1);
      jasmine.clock().tick(50);
      expect(timerCallback.calls.count()).toEqual(2);
   });});describe("A spy", function() {
   var foo, bar = null;
   beforeEach(function() {
      foo = {
         setBar: function(value) {bar = value;}
      };
      spyOn(foo, 'setBar');
      foo.setBar(123);
      foo.setBar(456, 'another param');
   });
   it("tracks that the spy was called x times", function() {
      expect(foo.setBar).toHaveBeenCalledTimes(2);
   });
   it("tracks all the arguments of its calls", function() {
      expect(foo.setBar).toHaveBeenCalledWith(123);
      expect(foo.setBar).toHaveBeenCalledWith(456,
                                                               'another param');
   });
   it("stops all execution on a function", function() {
      expect(bar).toBeNull();
   });
   it("tracks if it was called at all", function() {
      foo.setBar();
      expect(foo.setBar.calls.any()).toEqual(true);
   });});

D:\demo\jasmine-demo>jasmineRandomized with seed 77466Started.............13 specs, 0 failuresFinished in 0.025 secondsRandomized with seed 77466 (jasmine --random=true --seed=77466)D:\demo\jasmine-demo>jasmineRandomized with seed 59496Started.............13 specs, 0 failuresFinished in 0.023 secondsRandomized with seed 59496 (jasmine --random=true --seed=59496)
To use Jasmine on a browser, add the following to your HTML file, substituting {#.#.#} with the release number.
<link rel="shortcut icon" type="image/png"
    href="lib/jasmine-{#.#.#}/jasmine_favicon.png"><link rel="stylesheet" type="text/css"
    href="lib/jasmine-{#.#.#}/jasmine.css"><script type="text/javascript"
     src="lib/jasmine-{#.#.#}/jasmine.js"></script><script type="text/javascript"
     src="lib/jasmine-{#.#.#}/jasmine-html.js"></script><script type="text/javascript"
    src="lib/jasmine-{#.#.#}/boot.js"></script>