source: imaps-frontend/node_modules/set-proto/test/index.js@ 79a0317

'use strict';

var test = require('tape');

var setProto = require('../');

var isPrototypeOf = Object.prototype.isPrototypeOf;

test('setProto', function (t) {
        t.equal(typeof setProto, 'function', 'is a function');

        t.test('can set', { skip: !setProto }, function (st) {
                var obj = { a: 1 };
                var proto = { b: 2 };

                st.ok(isPrototypeOf.call(Object.prototype, obj), 'Object.prototype is isPrototypeOf obj');
                st.notOk(isPrototypeOf.call(proto, obj), 'proto is not isPrototypeOf obj');
                st.ok('a' in obj, 'a is in obj');
                st.notOk('b' in obj, 'b is not in obj');

                // eslint-disable-next-line no-extra-parens
                st.equal(/** @type {NonNullable<typeof setProto>} */ (setProto)(obj, proto), obj, 'returns the object');

                st.ok(isPrototypeOf.call(Object.prototype, obj), 'Object.prototype is isPrototypeOf obj');
                st.ok(isPrototypeOf.call(proto, obj), 'proto is isPrototypeOf obj');
                st.ok('a' in obj, 'a is in obj');
                st.ok('b' in obj, 'b is in obj');

                st.equal(Object.getPrototypeOf(obj), proto, 'sets the prototype');
                st.end();
        });

        t.test('can not set', { skip: !!setProto }, function (st) {
                st.equal(setProto, null);

                st.end();
        });

        t.end();
});