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126 lines
3.7 KiB
JavaScript
126 lines
3.7 KiB
JavaScript
/*
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Copyright 2012-2015, Yahoo Inc.
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Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
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*/
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const fs = require('fs');
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const FileWriter = require('./file-writer');
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const XMLWriter = require('./xml-writer');
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const tree = require('./tree');
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const watermarks = require('./watermarks');
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function defaultSourceLookup(path) {
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try {
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return fs.readFileSync(path, 'utf8');
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} catch (ex) {
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throw new Error(
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'Unable to lookup source: ' + path + '(' + ex.message + ')'
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);
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}
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}
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function mergeWatermarks(specified, defaults) {
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specified = specified || {};
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Object.keys(defaults).forEach(k => {
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const specValue = specified[k];
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if (
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!(specValue && Array.isArray(specValue) && specValue.length === 2)
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) {
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specified[k] = defaults[k];
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}
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});
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return specified;
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}
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/**
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* A reporting context that is passed to report implementations
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* @param {Object} [opts=null] opts options
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* @param {String} [opts.dir='coverage'] opts.dir the reporting directory
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* @param {Object} [opts.watermarks=null] opts.watermarks watermarks for
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* statements, lines, branches and functions
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* @param {Function} [opts.sourceFinder=fsLookup] opts.sourceFinder a
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* function that returns source code given a file path. Defaults to
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* filesystem lookups based on path.
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* @constructor
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*/
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function Context(opts) {
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opts = opts || {};
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this.dir = opts.dir || 'coverage';
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this.watermarks = mergeWatermarks(opts.watermarks, watermarks.getDefault());
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this.sourceFinder = opts.sourceFinder || defaultSourceLookup;
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this.data = {};
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}
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Object.defineProperty(Context.prototype, 'writer', {
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enumerable: true,
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get() {
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if (!this.data.writer) {
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this.data.writer = new FileWriter(this.dir);
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}
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return this.data.writer;
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}
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});
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/**
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* returns a FileWriter implementation for reporting use. Also available
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* as the `writer` property on the context.
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* @returns {Writer}
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*/
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Context.prototype.getWriter = function() {
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return this.writer;
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};
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/**
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* returns the source code for the specified file path or throws if
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* the source could not be found.
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* @param {String} filePath the file path as found in a file coverage object
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* @returns {String} the source code
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*/
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Context.prototype.getSource = function(filePath) {
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return this.sourceFinder(filePath);
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};
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/**
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* returns the coverage class given a coverage
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* types and a percentage value.
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* @param {String} type - the coverage type, one of `statements`, `functions`,
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* `branches`, or `lines`
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* @param {Number} value - the percentage value
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* @returns {String} one of `high`, `medium` or `low`
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*/
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Context.prototype.classForPercent = function(type, value) {
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const watermarks = this.watermarks[type];
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if (!watermarks) {
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return 'unknown';
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}
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if (value < watermarks[0]) {
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return 'low';
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}
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if (value >= watermarks[1]) {
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return 'high';
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}
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return 'medium';
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};
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/**
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* returns an XML writer for the supplied content writer
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* @param {ContentWriter} contentWriter the content writer to which the returned XML writer
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* writes data
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* @returns {XMLWriter}
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*/
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Context.prototype.getXMLWriter = function(contentWriter) {
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return new XMLWriter(contentWriter);
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};
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/**
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* returns a full visitor given a partial one.
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* @param {Object} partialVisitor a partial visitor only having the functions of
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* interest to the caller. These functions are called with a scope that is the
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* supplied object.
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* @returns {Visitor}
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*/
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Context.prototype.getVisitor = function(partialVisitor) {
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return new tree.Visitor(partialVisitor);
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};
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module.exports = {
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create(opts) {
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return new Context(opts);
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}
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};
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