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| 1 | +/// <reference types="Cypress" /> |
| 2 | +const istanbul = require('istanbul-lib-coverage') |
| 3 | +const coverage = require('../fixtures/coverage.json') |
| 4 | +const { |
| 5 | + fileCoveragePlaceholder, |
| 6 | + removePlaceholders |
| 7 | +} = require('../../common-utils') |
| 8 | + |
| 9 | +/** |
| 10 | + * Extracts just the data from the coverage map object |
| 11 | + * @param {*} cm |
| 12 | + */ |
| 13 | +const coverageMapToCoverage = (cm) => { |
| 14 | + return JSON.parse(JSON.stringify(cm)) |
| 15 | +} |
| 16 | + |
| 17 | +describe('merging coverage', () => { |
| 18 | + const filename = '/src/index.js' |
| 19 | + |
| 20 | + before(() => { |
| 21 | + expect(coverage, 'initial coverage has this file').to.have.property( |
| 22 | + filename |
| 23 | + ) |
| 24 | + }) |
| 25 | + |
| 26 | + it('combines an empty coverage object', () => { |
| 27 | + const previous = istanbul.createCoverageMap({}) |
| 28 | + const coverageMap = istanbul.createCoverageMap(previous) |
| 29 | + coverageMap.merge(Cypress._.cloneDeep(coverage)) |
| 30 | + |
| 31 | + const merged = coverageMapToCoverage(coverageMap) |
| 32 | + |
| 33 | + expect(merged, 'merged coverage').to.deep.equal(coverage) |
| 34 | + }) |
| 35 | + |
| 36 | + it('combines the same full coverage twice', () => { |
| 37 | + const previous = istanbul.createCoverageMap(Cypress._.cloneDeep(coverage)) |
| 38 | + const coverageMap = istanbul.createCoverageMap(previous) |
| 39 | + coverageMap.merge(Cypress._.cloneDeep(coverage)) |
| 40 | + |
| 41 | + const merged = coverageMapToCoverage(coverageMap) |
| 42 | + // it is almost the same - only the statement count has been doubled |
| 43 | + const expected = Cypress._.cloneDeep(coverage) |
| 44 | + expected[filename].s[0] = 2 |
| 45 | + expect(merged, 'merged coverage').to.deep.equal(expected) |
| 46 | + }) |
| 47 | + |
| 48 | + it('does not merge correctly placeholders', () => { |
| 49 | + const coverageWithPlaceHolder = Cypress._.cloneDeep(coverage) |
| 50 | + const placeholder = fileCoveragePlaceholder(filename) |
| 51 | + coverageWithPlaceHolder[filename] = placeholder |
| 52 | + |
| 53 | + expect(coverageWithPlaceHolder, 'placeholder').to.deep.equal({ |
| 54 | + [filename]: placeholder |
| 55 | + }) |
| 56 | + |
| 57 | + // now lets merge full info |
| 58 | + const previous = istanbul.createCoverageMap(coverageWithPlaceHolder) |
| 59 | + const coverageMap = istanbul.createCoverageMap(previous) |
| 60 | + coverageMap.merge(coverage) |
| 61 | + |
| 62 | + const merged = coverageMapToCoverage(coverageMap) |
| 63 | + const expected = Cypress._.cloneDeep(coverage) |
| 64 | + // the merge against the placeholder without valid statement map |
| 65 | + // removes the statement map and sets the counter to null |
| 66 | + expected[filename].s = { 0: null } |
| 67 | + expected[filename].statementMap = {} |
| 68 | + // and no hashes :( |
| 69 | + delete expected[filename].hash |
| 70 | + delete expected[filename]._coverageSchema |
| 71 | + expect(merged).to.deep.equal(expected) |
| 72 | + }) |
| 73 | + |
| 74 | + it('removes placeholders', () => { |
| 75 | + const inputCoverage = Cypress._.cloneDeep(coverage) |
| 76 | + removePlaceholders(inputCoverage) |
| 77 | + expect(inputCoverage, 'nothing to remove').to.deep.equal(coverage) |
| 78 | + |
| 79 | + // add placeholder |
| 80 | + const placeholder = fileCoveragePlaceholder(filename) |
| 81 | + inputCoverage[filename] = placeholder |
| 82 | + |
| 83 | + removePlaceholders(inputCoverage) |
| 84 | + expect(inputCoverage, 'the placeholder has been removed').to.deep.equal({}) |
| 85 | + }) |
| 86 | +}) |
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