Function runTestsForParser

test/parser.ts:49–237

(parserId: string)

});

function runTestsForParser(parserId: string) {
  const parserName = parserId.split("/").pop();

  if (
    nodeMajorVersion < 6 &&
    (parserName === "babel" ||
      parserName === "flow" ||
      parserName === "typescript")
  ) {
    // Babel 7 no longer supports Node 4 or 5.
    return;
  }

  if (!parserName) {
    return;
  }

  const parser = require(parserId);

  it("[" + parserName + "] empty source", function () {
    const printer = new Printer();

    function check(code: string) {
      const ast = parse(code, { parser });
      assert.strictEqual(printer.print(ast).code, code);
    }

    check("");
    check("/* block comment */");
    check("// line comment");
    check("\t\t\t");
    check(eol);
    check(eol + eol);
    check("    ");
  });

  const lineCommentTypes: { [name: string]: string } = {
    acorn: "Line",
    babel: "CommentLine",
    esprima: "Line",
    flow: "CommentLine",
    typescript: "CommentLine",
  };

  it("[" + parserName + "] parser basics", function testParser(done) {
    const code = testParser + "";
    const ast = parse(code, { parser });

    namedTypes.File.assert(ast);
    assert.ok(getReprinter(FastPath.from(ast)));

    const funDecl = ast.program.body[0];
    const funBody = funDecl.body;

    namedTypes.FunctionDeclaration.assert(funDecl);
    namedTypes.BlockStatement.assert(funBody);
    assert.ok(getReprinter(FastPath.from(funBody)));