139 lines
3.7 KiB
JavaScript
139 lines
3.7 KiB
JavaScript
"use strict";
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const fs = require("fs");
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const extname = require("path").extname;
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const prettier = require("prettier/local");
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const AST_COMPARE = process.env["AST_COMPARE"];
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function run_spec(dirname, parsers, options) {
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/* instabul ignore if */
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if (!parsers || !parsers.length) {
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throw new Error(`No parsers were specified for ${dirname}`);
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}
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fs.readdirSync(dirname).forEach(filename => {
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const path = dirname + "/" + filename;
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if (
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extname(filename) !== ".snap" &&
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fs.lstatSync(path).isFile() &&
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filename[0] !== "." &&
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filename !== "jsfmt.spec.js"
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) {
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let rangeStart = 0;
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let rangeEnd = Infinity;
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let cursorOffset;
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const source = read(path)
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.replace(/\r\n/g, "\n")
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.replace("<<<PRETTIER_RANGE_START>>>", (match, offset) => {
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rangeStart = offset;
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return "";
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})
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.replace("<<<PRETTIER_RANGE_END>>>", (match, offset) => {
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rangeEnd = offset;
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return "";
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});
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const input = source.replace("<|>", (match, offset) => {
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cursorOffset = offset;
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return "";
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});
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const mergedOptions = Object.assign(mergeDefaultOptions(options || {}), {
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parser: parsers[0],
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rangeStart,
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rangeEnd,
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cursorOffset
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});
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const output = prettyprint(input, path, mergedOptions);
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test(`${filename} - ${mergedOptions.parser}-verify`, () => {
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expect(
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raw(source + "~".repeat(mergedOptions.printWidth) + "\n" + output)
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).toMatchSnapshot(filename);
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});
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parsers.slice(1).forEach(parser => {
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const verifyOptions = Object.assign({}, mergedOptions, { parser });
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test(`${filename} - ${parser}-verify`, () => {
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const verifyOutput = prettyprint(input, path, verifyOptions);
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expect(output).toEqual(verifyOutput);
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});
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});
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if (AST_COMPARE) {
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const compareOptions = Object.assign({}, mergedOptions);
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delete compareOptions.cursorOffset;
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const astMassaged = parse(input, compareOptions);
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let ppastMassaged;
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let pperr = null;
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try {
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ppastMassaged = parse(
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prettyprint(input, path, compareOptions),
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compareOptions
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);
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} catch (e) {
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pperr = e.stack;
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}
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test(path + " parse", () => {
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expect(pperr).toBe(null);
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expect(ppastMassaged).toBeDefined();
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if (!astMassaged.errors || astMassaged.errors.length === 0) {
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expect(astMassaged).toEqual(ppastMassaged);
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}
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});
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}
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}
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});
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}
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global.run_spec = run_spec;
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function parse(string, opts) {
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return prettier.__debug.parse(string, opts, /* massage */ true).ast;
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}
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function prettyprint(src, filename, options) {
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const result = prettier.formatWithCursor(
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src,
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Object.assign(
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{
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filepath: filename
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},
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options
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)
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);
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if (options.cursorOffset >= 0) {
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result.formatted =
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result.formatted.slice(0, result.cursorOffset) +
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"<|>" +
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result.formatted.slice(result.cursorOffset);
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}
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return result.formatted;
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}
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function read(filename) {
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return fs.readFileSync(filename, "utf8");
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}
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/**
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* Wraps a string in a marker object that is used by `./raw-serializer.js` to
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* directly print that string in a snapshot without escaping all double quotes.
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* Backticks will still be escaped.
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*/
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function raw(string) {
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if (typeof string !== "string") {
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throw new Error("Raw snapshots have to be strings.");
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}
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return { [Symbol.for("raw")]: string };
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}
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function mergeDefaultOptions(parserConfig) {
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return Object.assign(
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{
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printWidth: 80
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},
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parserConfig
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);
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}
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