87 lines
1.9 KiB
JavaScript
87 lines
1.9 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = readInitialCoverage;
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var _core = require("@babel/core");
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var _schema = require("@istanbuljs/schema");
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var _constants = require("./constants");
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function getAst(code) {
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if (typeof code === 'object' && typeof code.type === 'string') {
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// Assume code is already a babel ast.
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return code;
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}
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if (typeof code !== 'string') {
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throw new Error('Code must be a string');
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} // Parse as leniently as possible
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return (0, _core.parseSync)(code, {
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babelrc: false,
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configFile: false,
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parserOpts: {
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allowImportExportEverywhere: true,
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allowReturnOutsideFunction: true,
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allowSuperOutsideMethod: true,
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sourceType: 'script',
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plugins: _schema.defaults.instrumenter.parserPlugins
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}
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});
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}
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function readInitialCoverage(code) {
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const ast = getAst(code);
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let covScope;
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(0, _core.traverse)(ast, {
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ObjectProperty(path) {
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const {
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node
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} = path;
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if (!node.computed && path.get('key').isIdentifier() && node.key.name === _constants.MAGIC_KEY) {
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const magicValue = path.get('value').evaluate();
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if (!magicValue.confident || magicValue.value !== _constants.MAGIC_VALUE) {
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return;
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}
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covScope = path.scope.getFunctionParent() || path.scope.getProgramParent();
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path.stop();
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}
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}
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});
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if (!covScope) {
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return null;
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}
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const result = {};
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for (const key of ['path', 'hash', 'gcv', 'coverageData']) {
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const binding = covScope.getOwnBinding(key);
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if (!binding) {
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return null;
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}
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const valuePath = binding.path.get('init');
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const value = valuePath.evaluate();
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if (!value.confident) {
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return null;
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}
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result[key] = value.value;
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}
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delete result.coverageData[_constants.MAGIC_KEY];
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delete result.coverageData.hash;
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return result;
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}
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