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node_modules/@fluentui/utilities/lib/createMergedRef.test.js

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+import { __extends } from "tslib";
+import * as React from 'react';
+import { createMergedRef } from './createMergedRef';
+import { render } from '@testing-library/react';
+describe('createMergedRef', function () {
+    it('can merge refs', function () {
+        var ref1 = React.createRef();
+        var Foo = /** @class */ (function (_super) {
+            __extends(Foo, _super);
+            function Foo() {
+                var _this = _super !== null && _super.apply(this, arguments) || this;
+                _this.mergedRef = createMergedRef();
+                return _this;
+            }
+            Foo.prototype.render = function () {
+                return React.createElement("div", { ref: this.mergedRef(this.props.domRef, ref1) });
+            };
+            return Foo;
+        }(React.Component));
+        var ref2 = React.createRef();
+        var wrapper = render(React.createElement(Foo, { domRef: ref2 }));
+        expect(ref1.current).toBeTruthy();
+        expect(ref2.current).toBeTruthy();
+        wrapper.unmount();
+        expect(ref1.current).toBeNull();
+        expect(ref2.current).toBeNull();
+    });
+    it('returns the same ref object with the same input twice', function () {
+        var mergedRef = createMergedRef();
+        expect(mergedRef()).toBe(mergedRef());
+    });
+    it('should return a new resolver if the refs change', function () {
+        var mergedRef = createMergedRef();
+        expect(mergedRef(null)).not.toBe(mergedRef(React.createRef()));
+    });
+});
+//# sourceMappingURL=createMergedRef.test.js.map