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This commit is contained in:
Jacob Levine
2019-01-06 13:14:45 -06:00
parent d7301e26c3
commit d2d5d4c04e
15662 changed files with 2166516 additions and 0 deletions

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'use strict';
try {
// If this doesn't throw, then arrow functions are supported natively.
// Do not require babel (for speed).
eval('var x = () => {};');
} catch (e) {
require('babel-core/register')({
only: /test.js$/,
presets: ['es2015']
});
}

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--compilers js:babel.js

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{
"name": "acorn-es7-plugin-test",
"version": "0.0.5",
"description": "Tests for acorn-es7-plugin",
"main": "nothing-here",
"scripts": {
"test": "npm i acorn@3 ; mocha --opts ./mocha.opts ; node test-es5.js ; npm i acorn@4 ; mocha --opts ./mocha.opts ; node test-es5.js ; npm i acorn@5 ; mocha --opts ./mocha.opts ; node test-es5.js"
},
"repository": {
"type": "git",
"url": "git+https://github.com/MatAtBread/acorn-es7-plugin.git"
},
"keywords": [
"acorn",
"parser",
"es7",
"async",
"await"
],
"author": "matatbread",
"license": "MIT",
"bugs": {
"url": "https://github.com/MatAtBread/acorn-es7-plugin/issues"
},
"homepage": "https://github.com/MatAtBread/acorn-es7-plugin#readme",
"devDependencies": {
"babel-core": "^6.0.20",
"babel-preset-es2015": "^6.0.15",
"estraverse": "^4.1.1",
"mocha": "^2.3.3",
"colors": "^1.1.2",
"xtend": "^4.0.1"
},
"dependencies": {
"babel-core": "^6.14.0",
"babel-preset-es2015": "^6.14.0",
"colors": "^1.1.2",
"estraverse": "^4.2.0",
"mocha": "^2.5.3",
"xtend": "^4.0.1"
}
}

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'use strict';
/* Simple test script that doesn't need mocha or similar - it just parses stuff and checks the returned AST */
var acorn = require('acorn');
var colors = require('colors');
require('../')(acorn);
function parse(code, pluginOptions, scriptType) {
if (Array.isArray(code)) {
code = code.join('\n');
}
return acorn.parse(code, {
sourceType: scriptType,
ecmaVersion: 8,
locations: true,
ranges: true,
plugins: {
asyncawait: pluginOptions || {}
}
});
}
function isIdentThenFnDecl(ast) {
return ast.body[0].type === 'ExpressionStatement' && ast.body[0].expression.type === 'Identifier' && ast.body[0].expression.name === 'async' && !ast.body[1].async === true && ast.body[1].type == "FunctionDeclaration";
}
function isAsyncFnDecl(ast) {
return ast.body[0].async === true && ast.body[0].type === "FunctionDeclaration";
}
function isAsyncFnExpr(ast) {
return ast.body[0].expression.async === true && ast.body[0].expression.type === "ArrowFunctionExpression";
}
function isExprType(type) {
return function (ast, sourceType) {
return ast.body[0].type === 'ExpressionStatement' && ast.body[0].expression.type === type;
};
}
var tests = [
/* Standard behaviours */
{
desc: "Simple async function",
code: "async function x() { return undefined; }",
pass: function (ast) {
return ast.body[0].async === true;
}
},{
desc: "Simple async function expression",
code: "(async function (){ })",
pass: function (ast) {
return ast.body[0].expression.async === true;
}
},{
desc: "Async function expression call (1)",
code: "(async function (){ }())",
pass: function (ast) {
return ast.body[0].expression.callee.async === true;
}
},{
desc: "Async function expression call (2)",
code: "(async function (){ })()",
pass: function (ast) {
return ast.body[0].expression.callee.async === true;
}
},{
desc: "Await in async is AwaitExpression",
code: "async function x() { await(undefined); await undefined ; }",
pass: function (ast) {
return ast.body[0].body.body[0].expression.type === 'AwaitExpression' && ast.body[0].body.body[1].expression.type === 'AwaitExpression';
}
},{
desc: "Await in function is identifier in 'script', illegal in 'module'",
code: "function x() { await(undefined); }",
pass: function (ast,scriptType) {
return scriptType === 'script'?ast.body[0].body.body[0].expression.callee.name === 'await':ast.indexOf("(1:15)")>=0;
}
},{
desc: "Async method {code}",
code: "var a = {async x(){}}",
pass: function (ast) {
return ast.body[0].declarations[0].init.properties[0].value.async;
}
},{
desc: "Async arrow",
code: "var a = async()=>0",
pass: function (ast) {
return ast.body[0].declarations[0].init.async;
}
},{
desc: "Abbreviated async arrow",
code: "var a = async b=>-b",
pass: function (ast) {
return ast.body[0].declarations[0].init.async;
}
},{
desc: "Parenthesized async arrow is a call",
code: "var a = async(b=>0)",
pass: function (ast) {
return ast.body[0].declarations[0].init.type==='CallExpression';
}
},{
desc: "Await declaration fails in async function",
code: "async function x() { var await; }",
pass: function (ex, scriptType) {
return ex.indexOf("(1:25)")>=0
}
},{
desc: "Await function declaration fails in async function",
code: "async function x() { function await() {} }",
pass: function (ex, scriptType) {
return ex.indexOf("(1:30)")>=0
}
},{
desc: "Await reference fails in async function",
code: "async function x() { return 1+await; }",
pass: function (ex) {
return !!ex.match(/\(1:3[05]\)/);
}
},{
desc: "{code} is an async FunctionExpression",
code: "async ()=>0",
pass: isAsyncFnExpr
},{
desc: "{code} is a CallExpression",
code: "async(()=>0)",
pass: isExprType('CallExpression')
},{
desc: "{code} is an async FunctionDeclaration",
code: "async /* a */ function x(){}",
pass: isAsyncFnDecl
},{
desc: "{code} is a reference to 'async' and a sync FunctionDeclaration",
code: "async /*\n*/function x(){}",
pass: isIdentThenFnDecl
},{
desc: "{code} is a reference to 'async' and a sync FunctionDeclaration",
code: "async /* a */\nfunction x(){}",
pass: isIdentThenFnDecl
},{
desc: "{code} is a reference to 'async' and a sync FunctionDeclaration",
code: "async\nfunction x(){}",
pass: isIdentThenFnDecl
},{
desc: "{code} is a reference to 'async' and a sync FunctionDeclaration",
code: "async //\nfunction x(){}",
pass: isIdentThenFnDecl
},{
desc: "{code} is a reference to 'async' and a sync FunctionDeclaration",
code: "async /*\n*/\nfunction x(){}",
pass: isIdentThenFnDecl
},{
desc: "{code} is a SyntaxError (when inAsyncFunction and awaitAnywhere option are defaults)",
code: "await x",
pass: function (ex, sourceType) {
return sourceType==='module' ? !!ex.match(/\(1:0\)/) : ex === "Unexpected token (1:6)";
}
},{
desc: "{code} is a CallExpression in scripts, and a SyntaxError in modules",
code: "await(x)",
pass: function(ast,sourceType) {
return sourceType==='module'?!!ast.match(/\(1:0\)/) :isExprType('CallExpression')(ast)
}
},{
desc: "Async method 'constructor' is valid",
code: "var a = {async constructor(){}}",
pass: function (ast) {
var props = ast.body[0].declarations[0].init.properties ;
return (props[0].kind === 'init' && props[0].key.name==='constructor' && props[0].value.async)
}
},{
desc: "Async class constructor fails",
code: "class a {async constructor(){}}",
pass: function (ex) {
return !!ex.match(/class constructor\(\) cannot be be async \(1:(15|9)\)/) || ex === "Constructor can't be an async method (1:15)";
}
},{
desc: "Async setter fails",
code: "var a = {async set x(y){}}",
pass: function (ex) {
return ex === "'set <member>(value)' cannot be be async (1:15)" || ex === "Unexpected token (1:19)";
}
},{
desc: "Deprecated async setter fails (use 'async set x')",
code: "var a = {set async x(y){}}",
pass: function (ex) {
return ex === "'set <member>(value)' cannot be be async (1:13)" || ex === "Unexpected token (1:19)";
}
},{
desc: "{code} getters/setters are not async",
code: "var a = {get x(){},set y(z){}}",
pass: function (ast) {
var props = ast.body[0].declarations[0].init.properties ;
return (props[0].kind === 'get' && props[0].key.name==='x' && !props[0].value.async)
&& (props[1].kind === 'set' && props[1].key.name==='y' && !props[1].value.async);
}
},{
desc: "{code} are methods, not getters/setters",
code: "var a = {async get(){},async set(){}}",
pass: function (ast) {
var props = ast.body[0].declarations[0].init.properties ;
return (props[0].kind === 'init' && props[0].key.name==='get' && props[0].value.async)
&& (props[1].kind === 'init' && props[1].key.name==='set' && props[1].value.async);
}
},{
desc: "In {code}, x is an sync getter",
code: "class a {get x(){}}",
pass: function (ast) {
return ast.body[0].body.body[0].kind==="get" && !ast.body[0].body.body[0].value.async && !ast.body[0].body.body[0].static ;
}
},{
desc: "In {code}, x is an static sync getter",
code: "class a {static get x(){}}",
pass: function (ast) {
return ast.body[0].body.body[0].kind==="get" && !ast.body[0].body.body[0].value.async && ast.body[0].body.body[0].static ;
}
},{
desc: "In {code}, x is an static sync method",
code: "class a {static async x(){}}",
pass: function (ast) {
return ast.body[0].body.body[0].kind==="method" && ast.body[0].body.body[0].value.async && ast.body[0].body.body[0].static ;
}
},{
desc: "{code} are a getters/setters, not methods",
code: "var a = {get async(){},set async(x){}}",
pass: function (ast) {
var props = ast.body[0].declarations[0].init.properties ;
return (props[0].kind === 'get' && props[0].key.name==='async' && !props[0].value.async)
&& (props[1].kind === 'set' && props[1].key.name==='async' && !props[1].value.async);
}
},
/* Extended syntax behaviour for Nodent */
{
desc: "Nodent:".grey+" In {code}, get is a static method",
code: "class Foo { static get(v) {} }",
pass: function (ast) {
return ast.body[0].body.body[0].type==='MethodDefinition'
&& ast.body[0].body.body[0].key.name === 'get'
&& ast.body[0].body.body[0].kind === "method"
&& ast.body[0].body.body[0].static;
}
},{
desc: "Nodent:".grey+" In {code}, get is a non-static method",
code: "class Foo { get(v) {} }",
pass: function (ast) {
return ast.body[0].body.body[0].type==='MethodDefinition'
&& ast.body[0].body.body[0].key.name === 'get'
&& ast.body[0].body.body[0].kind === "method"
&& !ast.body[0].body.body[0].static;
}
},{
desc: "Nodent:".grey+" In {code}, get is a non-static getter",
code: "class Foo { get get() {} }",
pass: function (ast) {
return ast.body[0].body.body[0].type==='MethodDefinition'
&& ast.body[0].body.body[0].key.name === 'get'
&& ast.body[0].body.body[0].kind === "get"
&& !ast.body[0].body.body[0].static;
}
},{
desc: "Nodent:".grey+" In {code}, x is an async getter",
code: "var a = {async get x(){ await(0) }}",
pass: function (ast) {
return ast.body[0].declarations[0].init.properties[0].value.async
&& ast.body[0].declarations[0].init.properties[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code} (deprecated), x is an async getter",
code: "var a = {get async x(){ await 0 }}",
pass: function (ast) {
return ast.body[0].declarations[0].init.properties[0].value.async
&& ast.body[0].declarations[0].init.properties[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code} (deprecated), x is an async getter",
code: "var a = {get async x(){ await(0) }}",
pass: function (ast) {
return ast.body[0].declarations[0].init.properties[0].value.async
&& ast.body[0].declarations[0].init.properties[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code}, x is an async getter",
code: "class a {async get x(){ await 0 }}",
pass: function (ast) {
return ast.body[0].body.body[0].value.async
&& ast.body[0].body.body[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code}, x is an async getter",
code: "class a {async get x(){ await(0) }}",
pass: function (ast) {
return ast.body[0].body.body[0].value.async
&& ast.body[0].body.body[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code} (deprecated), x is an async getter",
code: "class a {get async x(){ await 0 }}",
pass: function (ast) {
return ast.body[0].body.body[0].value.async
&& ast.body[0].body.body[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code} (deprecated), x is an async getter",
code: "class a {get async x(){ await(0) }}",
pass: function (ast) {
return ast.body[0].body.body[0].value.async
&& ast.body[0].body.body[0].value.body.body[0].expression.type==='AwaitExpression';
}
},{
desc: "Nodent:".grey+" In {code}, x is an static async getter",
code: "class a {static async get x(){}}",
pass: function (ast) {
return ast.body[0].body.body[0].kind==="get" && ast.body[0].body.body[0].value.async && ast.body[0].body.body[0].static ;
}
},{
desc: "Nodent:".grey+" In {code} (deprecated), x is an static async getter",
code: "class a {static get async x(){}}",
pass: function (ast) {
return ast.body[0].body.body[0].kind==="get" && ast.body[0].body.body[0].value.async && ast.body[0].body.body[0].static ;
}
},{
desc: "Nodent:".grey+" {code} is an AwaitExpression when inAsyncFunction option is true",
code: "await(x)",
options: {
inAsyncFunction: true
},
pass: isExprType('AwaitExpression')
},{
desc: "Nodent:".grey+" {code} is an AwaitExpression when inAsyncFunction option is true",
code: "await x",
options: {
inAsyncFunction: true
},
pass: isExprType('AwaitExpression')
},{
desc: "Nodent:".grey+" {code} is a CallExpression when awaitAnywhere option is true",
code: "await(x)",
options: {
awaitAnywhere: true
},
pass: isExprType('CallExpression')
},{
desc: "Nodent:".grey+" {code} is an AwaitExpression when awaitAnywhere option is true",
code: "await x",
options: {
awaitAnywhere: true
},
pass: isExprType('AwaitExpression')
}];
// TODO: Add tests for asyncExits, noAsyncGetters
var out = {
true: "pass".green,
false: "fail".red
};
var testNumber = +process.argv[2] || 0;
if (testNumber) {
tests = [tests[testNumber - 1]];
} else {
testNumber += 1;
}
var results = {
true: 0,
false: 0
};
tests.forEach(function (test, idx) {
['script','module'].forEach(function(scriptType){
var code = test.code.replace(/\n/g, ' <linefeed> ');
var desc = test.desc.replace('{code}', code.yellow);
var pass = function () {
var p = test.pass.apply(this, arguments);
results[p] += 1;
return p;
};
var prefix = idx + testNumber + " (" + scriptType + ", acorn v" + acorn.version+")\t" ;
try {
console.log(prefix, desc, out[pass(parse(test.code, test.options, scriptType),scriptType)]);
} catch (ex) {
try {
console.log(prefix, desc, ex.message.cyan, out[pass(ex.message,scriptType)]);
} catch (ex) {
console.log(prefix, desc, ex.message.magenta, out[false]);
results.false += 1;
}
}
});
}) ;
console.log('');
if (results.true)
console.log((results.true + " of " + tests.length*2 + " tests passed").green);
if (results.false) {
console.log((results.false + " of " + tests.length*2 + " tests failed").red);
var exit = new Error("Test failed") ;
exit.stack = "" ;
throw exit ;
}

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'use strict';
var acorn = require('acorn');
require('../')(acorn);
var estraverse = require('estraverse');
var xtend = require('xtend');
var assert = require('assert');
function find (type, ast, skip) {
skip = skip || 0;
var skipped = 0;
var found;
estraverse.traverse(ast, {
enter: (node) => {
if (found) {
return estraverse.VisitorOption.Skip;
}
if (node.type == type) {
if (skipped === skip) {
found = node;
return estraverse.VisitorOption.Skip;
}
skipped++;
}
}
});
if (!found) {
throw new Error('did not find AwaitExpression (skipped ' + skipped + '/' + skip + ')');
}
return found;
}
function extendOptions(pluginOptions, acornOptions) {
return xtend({
sourceType: 'module',
ecmaVersion: 8,
locations: true,
ranges: true,
plugins: {asyncawait: pluginOptions || pluginOptions !== false}
}, acornOptions);
}
function parse(code, pluginOptions, acornOptions) {
if (Array.isArray(code)) {
code = code.join('\n');
}
var options = extendOptions(pluginOptions, acornOptions);
return acorn.parse(code, options);
}
describe('async', () => {
describe ('function declaration', () => {
var node;
describe('-', () => {
beforeEach(() => {
node = find(
'FunctionDeclaration',
parse([
'async function foo() {',
' x = await bar()',
'}'
])
);
});
it('marks the node as async', () =>
assert(node.async)
);
it('finds correct start position', () =>
assert.strictEqual(node.start, 0)
);
it('finds correct end position', () =>
assert.strictEqual(node.end, 42)
);
it('finds correct start line/column', () =>
assert.deepEqual(node.loc.start, {
line: 1,
column: 0
})
);
it('finds correct end line/column', () =>
assert.deepEqual(node.loc.end, {
line: 3,
column: 1
})
);
});
var assertFindsIdentifierExpressionStatement = (ast) => {
node = find('ExpressionStatement', ast);
assert.strictEqual(node.expression.type, 'Identifier');
assert.strictEqual(node.expression.name, 'async');
assert.deepEqual(node.expression.loc, {
start: {
line: 1,
column: 0
},
end: {
line: 1,
column: 5
}
});
};
describe('linefeed after async (simple)', () => {
var ast;
beforeEach(() => {
ast = parse([
'async \t\t ',
'function foo() {',
'}'
]);
});
it('finds Identifier ExpressionStatement', () => {
assertFindsIdentifierExpressionStatement(ast);
});
it('does not mark FunctionDeclaration as async', () => {
node = find('FunctionDeclaration', ast);
assert(!node.async, 'Expected node.async to be false');
});
});
describe('linefeed after async (single line comment)', () => {
var ast;
beforeEach(() => {
ast = parse([
'async // flag enables async completion',
'function foo() {',
'}'
]);
});
it('finds Identifier ExpressionStatement', () => {
assertFindsIdentifierExpressionStatement(ast);
});
it('does not mark FunctionDeclaration as async', () => {
node = find('FunctionDeclaration', ast);
assert(!node.async, 'Expected node.async to be false');
});
});
describe('linefeed after async (multiline comment) function', () => {
var ast;
beforeEach(() => {
ast = parse([
'async /* flag enables async completion',
' of the callback */function foo() {',
'}'
]);
});
it('finds Identifier ExpressionStatement', () => {
assertFindsIdentifierExpressionStatement(ast);
});
it('does not mark FunctionDeclaration as async', () => {
node = find('FunctionDeclaration', ast);
assert(!node.async, 'Expected node.async to be false');
});
});
});
describe ('function expression', () => {
var node, code;
describe('-', () => {
beforeEach(() => {
code = [
'foo = async function () {',
' x = await bar()',
'}'
];
node = find(
'FunctionExpression',
parse(code)
);
});
it('marks the node as async', () =>
assert(node.async)
);
it('finds correct start position', () =>
assert.strictEqual(node.start, 6)
);
it('finds correct end position', () =>
assert.strictEqual(node.end, code.join('\n').length)
);
it('finds correct start line/column', () =>
assert.deepEqual(node.loc.start, {
line: 1,
column: 6
})
);
it('finds correct end line/column', () =>
assert.deepEqual(node.loc.end, {
line: 3,
column: 1
})
);
});
var assertFindsIdentifierAssignmentExpressionRHS = (ast) => {
node = find('AssignmentExpression', ast);
assert.strictEqual(node.right.type, 'Identifier');
assert.strictEqual(node.right.name, 'async');
assert.deepEqual(node.right.loc, {
start: {
line: 1,
column: 6
},
end: {
line: 1,
column: 11
}
});
};
describe('linefeed after async (simple)', () => {
var ast;
beforeEach(() => {
ast = parse([
'foo = async \t\t ',
', function() {',
'}'
]);
});
it('finds Identifier ExpressionStatement', () => {
assertFindsIdentifierAssignmentExpressionRHS(ast);
});
it('does not mark FunctionExpression as async', () => {
node = find('FunctionExpression', ast);
assert(!node.async, 'Expected node.async to be false');
});
});
describe('linefeed after async (single line comment)', () => {
var ast;
beforeEach(() => {
ast = parse([
'foo = async // flag enables async completion',
', function() {',
'}'
]);
});
it('finds Identifier ExpressionStatement', () => {
assertFindsIdentifierAssignmentExpressionRHS(ast);
});
it('does not mark FunctionExpression as async', () => {
node = find('FunctionExpression', ast);
assert(!node.async, 'Expected node.async to be false');
});
});
describe('linefeed after async (multiline comment), function', () => {
var ast;
beforeEach(() => {
ast = parse([
'foo = async /* flag enables async completion',
' of the callback */, function() {',
'}'
]);
});
it('finds Identifier ExpressionStatement', () => {
assertFindsIdentifierAssignmentExpressionRHS(ast);
});
it('does not mark FunctionExpression as async', () => {
node = find('FunctionExpression', ast);
assert(!node.async, 'Expected node.async to be false');
});
});
});
describe ('enhanced object literal', () => {
var node, code;
describe('-', () => {
beforeEach(() => {
code = [
'var x = {',
' async foo() {}',
'};'
];
node = find(
// TODO: Is it really supposed to mark the Property async? Why not the FunctionExpression?
'Property',
parse(code)
);
});
it('marks the node value as async', () =>
assert(node.value.async)
);
it('does not mark the node as async', () =>
assert(!node.async)
);
it('finds correct start position', () =>
assert.strictEqual(node.start, 12)
);
it('finds correct end position', () =>
assert.strictEqual(node.end, code[0].length + code[1].length + 1) // + 1 is due to newline char
);
it('finds correct start line/column', () =>
assert.deepEqual(node.loc.start, {
line: 2,
column: 2
})
);
it('finds correct end line/column', () =>
assert.deepEqual(node.loc.end, {
line: 2,
column: 16
})
);
});
describe('linefeed after async (simple)', () => {
it('fails to parse', () => {
assert.throws(() => parse([
'var x = {',
' async \t\t ',
' foo() {}',
'};'
]));
});
});
describe('linefeed after async (single line comment)', () => {
it('fails to parse', () => {
assert.throws(() => parse([
'var x = {',
' async // flag enables async completion',
' foo() {}',
'};'
]));
});
});
describe('linefeed after async (multiline comment) illegal decl', () => {
it('finds Identifier ExpressionStatement', () => {
assert.throws(() => parse([
'var x = {',
' async /* flag enables async completion',
' of the callback */ foo() {}',
'};'
]));
});
});
});
describe ('ArrowFunctionExpression', () => {
var node, code;
describe('-', () => {
beforeEach(() => {
code = 'var x = async () => {}';
node = find(
'ArrowFunctionExpression',
parse(code)
);
});
it('marks the node as async', () =>
assert(node.async)
);
it('finds correct start position', () =>
assert.strictEqual(node.start, 8)
);
it('finds correct end position', () =>
assert.strictEqual(node.end, code.length)
);
it('finds correct start line/column', () =>
assert.deepEqual(node.loc.start, {
line: 1,
column: 8
})
);
it('finds correct end line/column', () =>
assert.deepEqual(node.loc.end, {
line: 1,
column: code.length
})
);
});
describe('linefeed after async (simple)', () => {
var ast;
beforeEach(() => {
ast = parse([
'var x = async \t\t ',
'()'
]);
});
it('fails to parse if linefeed preceeds arrow arguments', () => {
assert.throws(() => parse([
'var x = async \t\t ',
'() => {}'
]));
});
it('finds CallExpression with "async" Identifier callee', () => {
node = find('CallExpression', ast);
assert.strictEqual(node.callee.type, 'Identifier');
assert.strictEqual(node.callee.name, 'async');
assert.deepEqual(node.callee.loc, {
start: {
line: 1,
column: 8
},
end: {
line: 1,
column: 13
}
});
});
});
describe('linefeed after async (single line comment)', () => {
var ast;
beforeEach(() => {
ast = parse([
'var x = async // flag enables async completion',
'()'
]);
});
it('fails to parse if linefeed preceeds arrow arguments', () => {
assert.throws(() => parse([
'var x = async \t\t ',
'() => {}'
]));
});
it('finds CallExpression with "async" Identifier callee', () => {
node = find('CallExpression', ast);
assert.strictEqual(node.callee.type, 'Identifier');
assert.strictEqual(node.callee.name, 'async');
assert.deepEqual(node.callee.loc, {
start: {
line: 1,
column: 8
},
end: {
line: 1,
column: 13
}
});
});
});
describe('linefeed after async (multiline comment) arrow decl', () => {
var ast;
beforeEach(() => {
ast = parse([
'var x = async /* flag enables async completion',
' of the callback */()'
]);
});
it('fails to parse if linefeed preceeds arrow arguments', () => {
assert.throws(() => parse([
'var x = async /* flag enables async completion',
' of the callback */() => {}'
]));
});
it('finds CallExpression with "async" Identifier callee', () => {
node = find('CallExpression', ast);
assert.strictEqual(node.callee.type, 'Identifier');
assert.strictEqual(node.callee.name, 'async');
assert.deepEqual(node.callee.loc, {
start: {
line: 1,
column: 8
},
end: {
line: 1,
column: 13
}
});
});
});
});
});
describe('await', () => {
describe('-', () => {
var node;
beforeEach(() => {
node = find(
'AwaitExpression',
parse([
'async function foo() {',
' x = await bar()',
'}'
])
);
});
it('finds correct start position', () =>
assert.strictEqual(node.start, 29)
);
it('finds correct end position', () =>
assert.strictEqual(node.end, 40)
);
it('finds correct start line/column', () =>
assert.deepEqual(node.loc.start, {
line: 2,
column: 6
})
);
it('finds correct end line/column', () =>
assert.deepEqual(node.loc.end, {
line: 2,
column: 17
})
);
});
describe('outside a function (awaitAnywhere)', () => {
var node;
beforeEach(() => {
node = find(
'AwaitExpression',
parse(
'x = await bar()',
{awaitAnywhere:true}
)
);
});
it('finds correct start position', () =>
assert.strictEqual(node.start, 4)
);
it('finds correct start line/column', () =>
assert.deepEqual(node.loc.start, {
line: 1,
column: 4
})
);
it('finds correct end position', () =>
assert.strictEqual(node.end, 15)
);
it('finds correct end line/column', () =>
assert.deepEqual(node.loc.end, {
line: 1,
column: 15
})
);
});
});

View File

@@ -0,0 +1,15 @@
(function () {
"use strict";
const acorn = require('acorn'); // 3.x
require('..')(acorn);
var code = "(async function x(){ console.log('hello'); }());";
var ast = acorn.parse(code,{
// Specify use of the plugin
plugins:{asyncawait:true},
// Specify the ecmaVersion
ecmaVersion: 7
}) ;
// Show the AST
console.log(JSON.stringify(ast,null,2)) ;
}());