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test.js
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test.js
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'use strict';
require('mocha');
var assert = require('assert');
var fs = require('fs');
var jsdom = require('jsdom');
var jQuery = fs.readFileSync('./node_modules/jquery/dist/jquery.js', "utf-8");
var generate = require('./dist/jquery-plugin-generator.js');
function createTestEnv(fn) {
return function (done) {
var dom = new jsdom.JSDOM('<html><body></body></html>', {'runScripts': 'dangerously'});
var window = dom.window;
var script = window.document.createElement('script');
script.textContent = jQuery;
window.document.body.appendChild(script);
fn(done, window.$);
window.close(); // clean up memory
};
}
describe('jquery-plugin-generator', function(done) {
it('should fail on invalid fn argument', function() {
assert.throws(function () {
generate(null);
}, /required/);
});
it('should not throw error if arrow function is provided', createTestEnv(function (done, $) {
assert.doesNotThrow(function () {
$.fn.test = generate(() => {});
$('<div></div><div></div>').test();
assert.equal('function', typeof $.fn.test);
}, TypeError);
done();
}));
it('should return a function', function () {
var plugin = generate(function () {});
assert.equal('function', typeof plugin);
});
it('should call constructor for each element once', createTestEnv(function (done, $) {
var called = 0;
$.fn.test = generate(function () { called++; });
$('<div></div><div></div>').test().test().test();
assert.equal(called, 2);
done();
}));
it('should call constructor with `new` keyword', createTestEnv(function (done, $) {
var plugin = function () {
assert.equal(this instanceof plugin, true);
done();
};
$.fn.test = generate(plugin);
$('<div></div>').test();
}));
it('should call api method after constructor', createTestEnv(function (done, $) {
var called = 0;
var plugin = function () {
this.method = function () { called++; };
};
$.fn.test = generate(plugin);
$('<div></div><div></div>').test('method');
assert.equal(called, 2);
done();
}));
it('should pass arguments to constructor', createTestEnv(function (done, $) {
var args = [];
var plugin = function (element, a, b, c) {
args = [element, a, b, c];
this.method = function () {};
};
$.fn.test = generate(plugin);
var element = $('<div></div>');
element.test(1, 'a', []).test('method', 2, 'b', {});
assert.equal(args[0].get(0), element.get(0));
assert.equal(args[1], 1);
assert.equal(args[2], 'a');
assert.deepEqual(args[3], []);
done();
}));
it('should pass arguments to api method', createTestEnv(function (done, $) {
var plugin = function () {
this.method = function (a, b, c) {
assert.equal(a, 1);
assert.equal(b, 'string');
assert.deepEqual(c, []);
done();
};
};
$.fn.test = generate(plugin);
$('<div></div>').test().test('method', 1, 'string', []);
}));
it('should return api method response', createTestEnv(function (done, $) {
var plugin = function () {
this.method = function () {
return 'response';
};
};
$.fn.test = generate(plugin);
assert.equal( $('<div></div>').test('method'), 'response' );
done();
}));
it('should be chainable', createTestEnv(function (done, $) {
$.fn.test = generate(function () {});
var elements = $('<div></div><div></div>');
var response = elements.test();
assert.equal(elements.length, response.length);
assert.equal(elements.get(0), response.get(0));
assert.equal(elements.get(1), response.get(1));
done();
}));
it('should call setOptions on subsequent calls', createTestEnv(function (done, $) {
var pluginCalled = 0;
var pluginArgs = [];
var setOptionsCalled = 0;
var setOptionsArgs = [];
var args = [];
var plugin = function (element, a, b) {
pluginCalled++;
pluginArgs = [element, a, b];
this.setOptions = function (a, b) {
setOptionsCalled++;
setOptionsArgs = [a, b];
};
};
$.fn.test = generate(plugin);
var element = $('<div></div>');
element.test({'a': 1}, 'b'); // constructor
element.test({'a': 2}, 'd'); // setOptions
element.test({'a': 3}, 'f'); // setOptions
assert.equal(pluginCalled, 1);
assert.equal(pluginArgs[0].get(0), element.get(0));
assert.deepEqual(pluginArgs[1], {'a': 1});
assert.equal(pluginArgs[2], 'b');
assert.equal(setOptionsCalled, 2);
assert.deepEqual(setOptionsArgs[0], {'a': 3});
assert.equal(setOptionsArgs[1], 'f');
done();
}));
it('calling `instance` API method shouldn\'t create a new instance if it doesn\'t exist', createTestEnv(function (done, $) {
var plugin = function () {
throw 'Instance was created while it shouldn\'t be';
};
$.fn.test = generate(plugin);
var instance = $('<div></div>').test('instance');
assert.equal(instance, null);
done();
}));
it('calling `instance` API method should return function/class instance', createTestEnv(function (done, $) {
var plugin = function () {};
$.fn.test = generate(plugin);
var element = $('<div></div>');
element.test();
var instance = element.test('instance');
assert.equal(typeof instance, 'object');
assert.equal(instance instanceof plugin, true);
done();
}));
});