Function assertSrcContents

tasks/test_syntax.js:97–175

()

 *   or match the case of the source file
 */
function assertSrcContents() {
    var logs = [];

    // require'd built-in modules
    var BUILTINS = ['events'];

    var getComputedStyleCnt = 0;

    glob(combineGlobs([srcGlob, libGlob])).then((files) => {
        files.forEach(function(file) {
            var code = fs.readFileSync(file, 'utf-8');

            // parse through code string while keeping track of comments
            var comments = [];
            falafel(code, { ecmaVersion: 'latest', locations: true, onComment: comments }, function(node) {
                // look for .classList
                if(node.type === 'MemberExpression') {
                    var source = node.source();
                    if(source === 'window.getComputedStyle') {
                        getComputedStyleCnt++;
                    }
                } else if(node.type === 'Identifier' && node.source() === 'getComputedStyle') {
                    if(node.parent.source() !== 'window.getComputedStyle') {
                        logs.push(file + ' : getComputedStyle must be called as a `window` property.');
                    }
                } else if(node.type === 'CallExpression' && node.callee.name === 'require') {
                    var pathNode = node.arguments[0];
                    var pathStr = pathNode.value;
                    if(pathNode.type !== 'Literal') {
                        logs.push(file + ' : You may only `require` literals.');
                    } else if(BUILTINS.indexOf(pathStr) === -1) {
                        // node version 8.9.0+ can use require.resolve(request, {paths: [...]})
                        // and avoid this explicit conversion to the current location
                        if(pathStr.charAt(0) === '.') {
                            pathStr = path.relative(__dirname, path.join(path.dirname(file), pathStr));
                        }
                        var fullPath = require.resolve(pathStr);
                        var casedPath = trueCasePath(fullPath);

                        if(fullPath !== trueCasePath(fullPath)) {
                            logs.push(file + ' : `require` path is not case-correct:\n' +
                                fullPath + ' -> ' + casedPath);
                        }
                    }
                }
            });
        });

        /*
         * window.getComputedStyle calls are restricted, so we want to be
         * explicit about it whenever we add or remove these calls. This is
         * the reason d3.selection.style is forbidden as a getter.
         *
         * The rule is:
         * - You MAY NOT call getComputedStyle during rendering a plot, EXCEPT
         *   in calculating autosize for the plot (which only makes sense if
         *   the plot is displayed). Other uses of getComputedStyle while
         *   rendering will fail, at least in Chrome, if the plot div is not