1 | /**
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2 | * @fileoverview Helpers to test EventGenerator interface.
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3 | * @author Toru Nagashima
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4 | */
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5 | ;
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6 |
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7 | /* global describe, it */
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8 |
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9 | //------------------------------------------------------------------------------
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10 | // Requirements
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11 | //------------------------------------------------------------------------------
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12 |
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13 | const assert = require("assert");
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14 |
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15 | //------------------------------------------------------------------------------
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16 | // Public Interface
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17 | //------------------------------------------------------------------------------
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18 |
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19 | module.exports = {
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20 |
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21 | /**
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22 | * Overrideable `describe` function to test.
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23 | * @param {string} text - A description.
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24 | * @param {Function} method - A test logic.
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25 | * @returns {any} The returned value with the test logic.
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26 | */
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27 | describe: (typeof describe === "function") ? describe : /* istanbul ignore next */ function(text, method) {
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28 | return method.apply(this);
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29 | },
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30 |
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31 | /**
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32 | * Overrideable `it` function to test.
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33 | * @param {string} text - A description.
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34 | * @param {Function} method - A test logic.
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35 | * @returns {any} The returned value with the test logic.
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36 | */
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37 | it: (typeof it === "function") ? it : /* istanbul ignore next */ function(text, method) {
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38 | return method.apply(this);
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39 | },
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40 |
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41 | /**
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42 | * Does some tests to check a given object implements the EventGenerator interface.
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43 | * @param {Object} instance - An object to check.
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44 | * @returns {void}
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45 | */
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46 | testEventGeneratorInterface(instance) {
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47 | this.describe("should implement EventGenerator interface", () => {
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48 | this.it("should have `emitter` property.", () => {
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49 | assert.equal(typeof instance.emitter, "object");
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50 | assert.equal(typeof instance.emitter.emit, "function");
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51 | });
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52 |
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53 | this.it("should have `enterNode` property.", () => {
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54 | assert.equal(typeof instance.enterNode, "function");
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55 | });
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56 |
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57 | this.it("should have `leaveNode` property.", () => {
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58 | assert.equal(typeof instance.leaveNode, "function");
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59 | });
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60 | });
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61 | }
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62 | };
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