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import-meta.ts
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import-meta.ts
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import { Context } from '../../../src/common';
import { pass, fail } from '../../test-utils';
import * as t from 'assert';
import { parseSource } from '../../../src/parser';
describe('Next - Import Meta', () => {
for (const arg of [
'class C {set x(_) { () => import.meta }}',
'function f() { import.meta}',
'class C {set x(_) { () => { import.meta } }}',
'class C {set x(_) { if (1) { import.meta }}}',
'({m() { if (1) {} else { import.meta }}})',
'({m() { while (0) { import.meta }}})',
'({m() { do { import.meta } while (0)}})',
'class C {set x(_) { import.meta.url }}',
'class C {set x(_) { import.meta[0] }}',
'function f() { import.meta.couldBeMutable = true }',
'class C {set x(_) { import.meta() }}',
'({set x(_) { new import.meta.MagicClass}})',
'({set x(_) { new import.meta}})',
'({set x(_) { t = [...import.meta]}})',
'class C {set x(_) { f = {...import.meta} }}',
'class C {set x(_) { delete import.meta }}',
"'use strict'; import.meta",
"'use strict'; () => { import.meta }",
"'use strict'; () => import.meta",
"'use strict'; if (1) { import.meta }",
"'use strict'; if (1) {} else { import.meta }",
"'use strict'; while (0) { import.meta }",
"'use strict'; do { import.meta } while (0)",
"'use strict'; import.meta.url",
"'use strict'; import.meta[0]",
"'use strict'; import.meta.couldBeMutable = true",
"'use strict'; import.meta()",
"'use strict'; new import.meta.MagicClass",
"'use strict'; new import.meta",
"'use strict'; t = [...import.meta]",
"'use strict'; f = {...import.meta}",
'(import.meta?.a)',
'(a?.import.meta)',
"'use strict'; delete import.meta",
'class C {m() { import.meta }}',
'class C {m() { () => { import.meta } }}',
'class C {m() { () => import.meta }}',
'class C {m() { if (1) { import.meta } }}',
'class C {m() { if (1) {} else { import.meta } }}',
'class C {m() { while (0) { import.meta } }}',
'({m() { do { import.meta } while (0)}})',
'({m() { import.meta.url}})',
'({m() { import.meta[0]}})',
'({m() { import.meta.couldBeMutable = true}})',
'({m() { import.meta()}})',
'({m() { new import.meta.MagicClass}})',
'({m: function() {new import.meta}})',
'({m: function() {t = [...import.meta]}})',
'({m: function() {f = {...import.meta}}})',
'({m: function() {delete import.meta}})',
'({set x(_) {import.meta}})',
"'use strict'; ({m: function() { while (0) { import.meta }}})",
'function f() { do { import.meta } while (0)}',
'var f = function() {import.meta.url}',
'var f = function() {import.meta[0]}',
'var f = function() {import.meta.couldBeMutable = true}',
'var f = function() {import.meta()}',
'var f = function() {new import.meta.MagicClass}',
'var f = function() {new import.meta}',
'var f = function() {t = [...import.meta]}',
'var f = function() {f = {...import.meta}}',
'var f = function() {delete import.meta}',
'f = {...import.meta}',
'delete import.meta',
'import.meta',
'() => { import.meta }',
'() => import.meta',
'if (1) { import.meta }',
'if (1) {} else { import.meta }',
'while (0) { import.meta }',
'do { import.meta } while (0)',
'import.meta.url',
'import.meta[0]()',
'import.meta[0](x = 123) ',
'import.meta([0](x = 123))',
'(import.meta([0](x = 123)))',
'(import.meta([x = (import.meta([x = (x)](x = 123)))](x = 123)))',
'(import.meta([x = (a??a)](x = 123)))',
'(import.meta([x = (a??a)](x = a?.b123)))',
'import.meta[0]',
'import.meta[0] = 123',
'import.meta[0] = 123',
'import.meta.couldBeMutable = true',
'(import.meta.couldBeMutable = true)',
'import.meta()',
'new import.meta.MagicClass',
'new import.meta',
't = [...import.meta]',
'export var meta = import.meta;',
'export function getMeta() { return import.meta;}',
'import.meta.url',
'import("string")?.import.meta',
'(a?.import("string")?.import.meta??(a))',
'import.meta?.(a?.import("string")?.import.meta??(a))',
'var a = import.meta;',
'import.meta, 1;',
'1, import.meta;',
'import.meta, a = 1;',
'a = 1, import.meta;',
'import.meta.url = 1, import.meta.url = 2;',
'import.meta, import.meta.url = 1;',
'import.meta;'
]) {
it(`${arg}`, () => {
t.doesNotThrow(() => {
parseSource(`${arg}`, undefined, Context.OptionsNext | Context.Strict | Context.Module);
});
});
it(`${arg}`, () => {
t.doesNotThrow(() => {
parseSource(
`${arg}`,
undefined,
Context.OptionsNext | Context.OptionsWebCompat | Context.Strict | Context.Module
);
});
});
}
fail('Expressions - Import Meta (fail)', [
['import?.meta', Context.OptionsNext],
['import?.meta', Context.None],
['import?.meta', Context.OptionsNext | Context.Strict | Context.Module],
['(import?.meta)', Context.OptionsNext | Context.Strict | Context.Module],
['(import.meta([1 = ()](x = 123)))', Context.OptionsNext | Context.Strict | Context.Module],
['import.(meta([0](x = 123)))', Context.OptionsNext | Context.Strict | Context.Module],
['import.meta[0]() = 123', Context.OptionsNext | Context.Strict | Context.Module],
['[import.meta] = [];', Context.OptionsNext | Context.Strict | Context.Module],
['[...import.meta] = [];', Context.OptionsNext | Context.Strict | Context.Module],
['import.meta = 0;', Context.OptionsNext | Context.Strict | Context.Module],
[
'async function* f() { for await (import.meta of null) ; }',
Context.OptionsNext | Context.Strict | Context.Module
],
['for (import.meta in null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['({a: import.meta} = {});', Context.OptionsNext | Context.Strict | Context.Module],
['({...import.meta} = {});', Context.OptionsNext | Context.Strict | Context.Module],
['import.meta++;', Context.OptionsNext | Context.Strict | Context.Module],
['var x, y, z; ( { import.meta } = {});', Context.OptionsNext | Context.Strict | Context.Module],
['var x, y, z; ( { x: import.meta } = {});', Context.OptionsNext | Context.Strict | Context.Module],
['var x, y, z; ( { x: import.meta = 1 } = {});', Context.OptionsNext | Context.Strict | Context.Module],
['var x, y, z; ( [import.meta] = {});', Context.OptionsNext | Context.Strict | Context.Module],
['var x, y, z; ( [import.meta = 1] = {});', Context.OptionsNext | Context.Strict | Context.Module],
[
'"use strict"; let x, y, z; for (x of [import.meta] = {});',
Context.OptionsNext | Context.Strict | Context.Module
],
[
'"use strict"; let x, y, z; for (x of [import.meta = 1] = {});',
Context.OptionsNext | Context.Strict | Context.Module
],
[
'"use strict"; let x, y, z; for (x of { x: import.meta } = {});',
Context.OptionsNext | Context.Strict | Context.Module
],
[
'"use strict"; let x, y, z; for (x in [import.meta] = {});',
Context.OptionsNext | Context.Strict | Context.Module
],
[
'"use strict"; let x, y, z; for (x in [import.meta = 1] = {});',
Context.OptionsNext | Context.Strict | Context.Module
],
[
'"use strict"; let x, y, z; for (x in { x: import.meta } = {});',
Context.OptionsNext | Context.Strict | Context.Module
],
['import.meta++;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['for (import.meta of null) ;', Context.OptionsNext | Context.Strict | Context.Module],
['[import.meta] = [];', Context.OptionsNext | Context.Strict | Context.Module],
['([import.meta] = [1])', Context.OptionsNext],
['var import.meta', Context.OptionsNext],
['for (var import.meta of [1]) {}', Context.OptionsWebCompat],
['var import.meta', Context.OptionsNext | Context.Module | Context.Strict]
]);
pass('Next - Import Meta (pass)', [
[
`({m() { import.meta.url}})`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'ObjectExpression',
properties: [
{
type: 'Property',
key: {
type: 'Identifier',
name: 'm'
},
value: {
type: 'FunctionExpression',
params: [],
body: {
type: 'BlockStatement',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
computed: false,
property: {
type: 'Identifier',
name: 'url'
}
}
}
]
},
async: false,
generator: false,
id: null
},
kind: 'init',
computed: false,
method: true,
shorthand: false
}
]
}
}
]
}
],
[
`if (1) { import.meta }`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'IfStatement',
test: {
type: 'Literal',
value: 1
},
consequent: {
type: 'BlockStatement',
body: [
{
type: 'ExpressionStatement',
expression: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
}
}
]
},
alternate: null
}
]
}
],
[
`var f = function() {import.meta.couldBeMutable = true}`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'VariableDeclaration',
kind: 'var',
declarations: [
{
type: 'VariableDeclarator',
init: {
type: 'FunctionExpression',
params: [],
body: {
type: 'BlockStatement',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'AssignmentExpression',
left: {
type: 'MemberExpression',
object: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
computed: false,
property: {
type: 'Identifier',
name: 'couldBeMutable'
}
},
operator: '=',
right: {
type: 'Literal',
value: true
}
}
}
]
},
async: false,
generator: false,
id: null
},
id: {
type: 'Identifier',
name: 'f'
}
}
]
}
]
}
],
[
`import.meta[0]`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
computed: true,
property: {
type: 'Literal',
value: 0
}
}
}
]
}
],
[
`do { import.meta } while (0)`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'DoWhileStatement',
body: {
type: 'BlockStatement',
body: [
{
type: 'ExpressionStatement',
expression: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
}
}
]
},
test: {
type: 'Literal',
value: 0
}
}
]
}
],
[
`import.meta()`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
arguments: []
}
}
]
}
],
[
`t = [...import.meta]`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'AssignmentExpression',
left: {
type: 'Identifier',
name: 't'
},
operator: '=',
right: {
type: 'ArrayExpression',
elements: [
{
type: 'SpreadElement',
argument: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
}
}
]
}
}
}
]
}
],
[
`"use strict"; ({m() { while (0) { import.meta } }})`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'Literal',
value: 'use strict'
}
},
{
type: 'ExpressionStatement',
expression: {
type: 'ObjectExpression',
properties: [
{
type: 'Property',
key: {
type: 'Identifier',
name: 'm'
},
value: {
type: 'FunctionExpression',
params: [],
body: {
type: 'BlockStatement',
body: [
{
type: 'WhileStatement',
test: {
type: 'Literal',
value: 0
},
body: {
type: 'BlockStatement',
body: [
{
type: 'ExpressionStatement',
expression: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
}
}
]
}
}
]
},
async: false,
generator: false,
id: null
},
kind: 'init',
computed: false,
method: true,
shorthand: false
}
]
}
}
]
}
],
[
`delete import.meta`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'UnaryExpression',
operator: 'delete',
argument: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
prefix: true
}
}
]
}
],
[
`import.meta.resolve('something')`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: {
type: 'MemberExpression',
object: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
computed: false,
property: {
type: 'Identifier',
name: 'resolve'
}
},
arguments: [
{
type: 'Literal',
value: 'something'
}
]
}
}
]
}
],
[
`const size = import.meta.scriptElement.dataset.size || 300;`,
Context.Module | Context.Strict | Context.OptionsNext,
{
type: 'Program',
sourceType: 'module',
body: [
{
type: 'VariableDeclaration',
kind: 'const',
declarations: [
{
type: 'VariableDeclarator',
init: {
type: 'LogicalExpression',
left: {
type: 'MemberExpression',
object: {
type: 'MemberExpression',
object: {
type: 'MemberExpression',
object: {
meta: {
type: 'Identifier',
name: 'import'
},
type: 'MetaProperty',
property: {
type: 'Identifier',
name: 'meta'
}
},
computed: false,
property: {
type: 'Identifier',
name: 'scriptElement'
}
},
computed: false,
property: {
type: 'Identifier',
name: 'dataset'
}
},
computed: false,
property: {
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