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332 lines (292 loc) · 10.8 KB
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'use strict';
var inherit = require('inherit'),
_ = require('lodash'),
path = require('path'),
url = require('url'),
Promise = require('bluebird'),
chalk = require('chalk'),
fs = require('fs-extra'),
fetch = require('node-fetch'),
css = require('css'),
mm = require('micromatch'),
coverage = require('gemini-coverage').api,
{coverage: {coverageLevel}} = require('gemini-core'),
SourceMapConsumer = require('source-map').SourceMapConsumer;
const Coverage = module.exports = inherit({
__constructor: function(config) {
this.config = config;
this.byURL = {};
this.covDir = path.resolve(this.config.system.projectRoot, 'gemini-coverage');
this.out = {};
this._warned = {};
},
addStatsForBrowser: function(stats, browserId) {
_.forEach(stats, function(coverage, url) {
if (coverage.ignored) {
this._warnInnacurate(url, coverage.message);
return;
}
this.byURL[url] = this.byURL[url] || {
sourceFile: this._urlToFilePath(url, browserId),
coverage: {}
};
_.assignWith(this.byURL[url].coverage, coverage, coverageLevel.merge);
}.bind(this));
},
_warnInnacurate: function(url, message) {
if (this._warned[url]) {
return;
}
console.warn(chalk.yellow('WARNING:'), chalk.blue(url), 'may have inaccurate coverage report');
console.warn(message);
this._warned[url] = true;
},
_urlToFilePath: function(url, browserId) {
const config = this.config;
const rootUrl = config.forBrowser(browserId).rootUrl;
const relPath = config.system.coverage.map(url, rootUrl);
return path.resolve(config.system.sourceRoot, relPath);
},
processStats: function() {
var _this = this;
return fs.mkdirsAsync(this.covDir)
.catch(function(err) {
// ignoring the fail if directory already exists.
if (err.code !== 'EEXIST') {
return Promise.reject(err);
}
})
.then(function() {
return Promise.all(Object.keys(_this.byURL).map(function(url) {
return _this.processCSS(url);
}))
.then(function() {
return _this.prepareOutputStats();
})
.then(function(data) {
return _this.writeStatsJson(data);
})
.then(function(data) {
if (!_this.config.system.coverage.html) {
return;
}
return coverage.gen({
sourceRoot: _this.config.system.sourceRoot,
destDir: path.join(_this.config.system.projectRoot, 'gemini-coverage')
}, {
coverage: data
});
});
});
},
processCSS: function(url) {
var _this = this,
cssPath = this.byURL[url].sourceFile,
cssRelPath = path.relative(this.config.system.sourceRoot, cssPath);
if (this.fileExcluded(cssRelPath)) {
return;
}
return readUrlOrFile(url, cssPath)
.then(function(content) {
var ast = css.parse(content);
return Promise.all([
ast,
content,
_this.getSourceMap(ast, cssPath, url)
]);
})
.spread(function(ast, fileContent, map) {
var ctx = {media: 0},
out = _this.out;
for (var r = 0; r < ast.stylesheet.rules.length; r++) {
_this.processRule(
ast.stylesheet.rules[r],
{
url: url,
filePath: cssPath,
out: out,
map: map,
docDir: path.dirname(cssPath)
},
ctx);
}
});
},
getSourceMap: function(ast, cssPath, cssUrl) {
var sourceMapUrl = this.findSourceMapPragma(ast);
if (!sourceMapUrl) {
return;
}
var base64Prefix = /^data:application\/json;(?:charset=utf-8;)?base64,/;
if (base64Prefix.test(sourceMapUrl)) {
var base64Str = sourceMapUrl.replace(base64Prefix, ''),
sourceMapStr = new Buffer(base64Str, 'base64').toString('utf8');
return new SourceMapConsumer(JSON.parse(sourceMapStr));
}
return readUrlOrFile(
url.resolve(cssUrl, sourceMapUrl),
path.resolve(path.dirname(cssPath), sourceMapUrl)
)
.catch(function(err) {
if (err.code !== 'ENOENT') {
return Promise.reject(err);
}
})
.then(function(map) {
return new SourceMapConsumer(JSON.parse(map));
});
},
findSourceMapPragma: function(ast) {
var re = /^#\s*sourceMappingUrl=([^\s]+)/i,
lastRule = _.last(ast.stylesheet.rules),
match = lastRule.type === 'comment' && lastRule.comment.match(re);
return match && decodeURI(match[1]);
},
processRule: function(rule, opts, ctx) {
if (rule.type !== 'rule') {
if (rule.type === 'media') {
rule.rules.forEach(function(childRule) {
opts.group = true;
this.processRule(
childRule,
opts,
ctx);
}, this);
ctx.media++;
}
return;
}
var ruleCoverage = _.reduce(rule.selectors, function(coverage, selector) {
var key = selector;
if (opts.group) {
key = '?' + ctx.media + ':' + key;
}
return coverageLevel.merge(coverage, this.byURL[opts.url].coverage[key]);
}.bind(this), coverageLevel.NONE);
var sourceStart = getPosition(rule.position.start, opts.url, opts.map),
sourceEnd = getPosition(rule.position.end, opts.url, opts.map),
// Synchronous realpath() is used because of original method is totally synchronous and recursive,
// while the order of recursive calls is important. Making the code being asynchronous won't make
// much benefit considering only one async call can be executed to guarantee the calling order.
src = path.relative(
this.config.system.sourceRoot,
fs.realpathSync(sourceStart.source ?
path.resolve(opts.docDir, sourceStart.source) :
opts.filePath)
),
block = this._getSourceBlock(src, sourceStart, sourceEnd);
block.coverage = coverageLevel.merge(block.coverage, ruleCoverage);
},
_getSourceBlock: function(source, start, end) {
var blocks = (this.out[source] = this.out[source] || {}),
key = [start.line, start.column, end.line, end.column].join(':');
if (!blocks[key]) {
blocks[key] = {
start: {
line: start.line,
column: start.column
},
end: {
line: end.line,
column: end.column
},
coverage: coverageLevel.NONE
};
}
return blocks[key];
},
fileExcluded: function(path) {
return this.config.system.coverage.exclude.some(function(excludePattern) {
return mm.isMatch(path, excludePattern, {matchBase: true});
});
},
writeStatsJson: function(data) {
return fs.writeFileAsync(
path.join(this.covDir, 'coverage.json'),
JSON.stringify(data, null, 4),
'utf8'
).then(() => data);
},
prepareOutputStats: function() {
var _this = this,
stat = {total: 0, covered: 0};
return {
files: Object.keys(this.out)
.filter(function(file) {
return !_this.fileExcluded(file);
})
.map(function(file) {
var covered = 0,
blocks = Object.keys(_this.out[file]).map(function(blockKey) {
var block = _this.out[file][blockKey];
if (block.coverage === 'full') {
covered++;
}
return {
start: block.start,
end: block.end,
type: coverageToType(block.coverage)
};
});
stat.covered += covered;
stat.total += blocks.length;
return {
file: file,
blocks: blocks,
stat: {
total: blocks.length,
covered: covered,
percent: Math.round(covered / blocks.length * 100)
}
};
}),
total: stat.total,
covered: stat.covered,
percent: Math.round(stat.covered / stat.total * 100)
};
}
}, {
create: function(config) {
return new Coverage(config);
}
});
function getPosition(originalPos, file, map) {
// amend rule position via source map if available
if (map) {
map = map.originalPositionFor({
line: originalPos.line,
column: originalPos.column
});
if (map.source) {
return map;
} else {
console.warn(
'Source map does not provide mapping for %s [%s:%s]. Report might be inaccurate.',
file,
originalPos.line,
originalPos.column);
}
}
// return original parser position if source map is not available or it doesn't provide mapping
return originalPos;
}
function readUrlOrFile(url, file) {
return readUrl()
.catch(function() {
return fs.readFileAsync(file, 'utf8');
});
}
function readUrl(url) {
return Promise.resolve(fetch(url))
.then((res) => res.text());
}
function coverageToType(coverage) {
switch (coverage) {
case coverageLevel.FULL:
return 'covered';
case coverageLevel.PARTIAL:
return 'partial';
case coverageLevel.NONE:
return 'none';
}
}