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// |reftest| module
// Copyright (C) 2018 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-meta-properties-runtime-semantics-evaluation
description: >
import.meta is an ordinary object.
info: |
Runtime Semantics: Evaluation
ImportMeta : import.meta
...
4. If importMeta is undefined.
a. Set importMeta to ObjectCreate(null).
b. Let importMetaValues be ! HostGetImportMetaProperties(module).
...
e. Perform ! HostFinalizeImportMeta(importMeta, module).
...
g. Return importMeta.
...
flags: [module]
features: [import.meta]
---*/
// import.meta is an object.
assert.sameValue(typeof import.meta, "object",
"typeof import.meta is 'object'");
assert.notSameValue(import.meta, null,
"typeof import.meta is 'object' and import.meta isn't |null|.");
assert.throws(TypeError, function() {
import.meta();
}, "import.meta is not callable");
assert.throws(TypeError, function() {
new import.meta();
}, "import.meta is not a constructor");
// Note: The properties, the shape of the properties, the extensibility state, and the prototype
// of import.meta are implementation-defined via HostGetImportMetaProperties and
// HostFinalizeImportMeta.
// Properties and the prototype can only be modified when import.meta is extensible.
if (Object.isExtensible(import.meta)) {
assert.sameValue(Object.getOwnPropertyDescriptor(import.meta, "test262prop"), undefined,
"test262 test property is not present initially");
import.meta.test262prop = "blubb";
assert.sameValue(import.meta.test262prop, "blubb",
"Properties can be added and retrieved from import.meta");
assert.sameValue(delete import.meta.test262prop, true,
"Properties can be removed from import.meta");
assert.sameValue(Object.getOwnPropertyDescriptor(import.meta, "test262prop"), undefined,
"test262 test property is no longer present");
var proto = {};
Object.setPrototypeOf(import.meta, proto);
assert.sameValue(Object.getPrototypeOf(import.meta), proto,
"[[Prototype]] of import.meta can be changed");
}
Object.preventExtensions(import.meta);
assert.sameValue(Object.isExtensible(import.meta), false,
"import.meta is non-extensible after calling |Object.preventExtensions|");
Object.seal(import.meta);
assert.sameValue(Object.isSealed(import.meta), true,
"import.meta is sealed after calling |Object.seal|");
Object.freeze(import.meta);
assert.sameValue(Object.isFrozen(import.meta), true,
"import.meta is frozen after calling |Object.freeze|");
reportCompare(0, 0);