source: trip-planner-front/node_modules/istanbul-lib-instrument/dist/read-coverage.js@ ceaed42

Last change on this file since ceaed42 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 1.9 KB
Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = readInitialCoverage;
7
8var _core = require("@babel/core");
9
10var _schema = require("@istanbuljs/schema");
11
12var _constants = require("./constants");
13
14function getAst(code) {
15 if (typeof code === 'object' && typeof code.type === 'string') {
16 // Assume code is already a babel ast.
17 return code;
18 }
19
20 if (typeof code !== 'string') {
21 throw new Error('Code must be a string');
22 } // Parse as leniently as possible
23
24
25 return (0, _core.parseSync)(code, {
26 babelrc: false,
27 configFile: false,
28 parserOpts: {
29 allowImportExportEverywhere: true,
30 allowReturnOutsideFunction: true,
31 allowSuperOutsideMethod: true,
32 sourceType: 'script',
33 plugins: _schema.defaults.instrumenter.parserPlugins
34 }
35 });
36}
37
38function readInitialCoverage(code) {
39 const ast = getAst(code);
40 let covScope;
41 (0, _core.traverse)(ast, {
42 ObjectProperty(path) {
43 const {
44 node
45 } = path;
46
47 if (!node.computed && path.get('key').isIdentifier() && node.key.name === _constants.MAGIC_KEY) {
48 const magicValue = path.get('value').evaluate();
49
50 if (!magicValue.confident || magicValue.value !== _constants.MAGIC_VALUE) {
51 return;
52 }
53
54 covScope = path.scope.getFunctionParent() || path.scope.getProgramParent();
55 path.stop();
56 }
57 }
58
59 });
60
61 if (!covScope) {
62 return null;
63 }
64
65 const result = {};
66
67 for (const key of ['path', 'hash', 'gcv', 'coverageData']) {
68 const binding = covScope.getOwnBinding(key);
69
70 if (!binding) {
71 return null;
72 }
73
74 const valuePath = binding.path.get('init');
75 const value = valuePath.evaluate();
76
77 if (!value.confident) {
78 return null;
79 }
80
81 result[key] = value.value;
82 }
83
84 delete result.coverageData[_constants.MAGIC_KEY];
85 delete result.coverageData.hash;
86 return result;
87}
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