await act(async () => ...)

packages/react-dom/src/__tests__/ReactTestUtils-test.js

@@ -14,7 +14,6 @@ let React;
 let ReactDOM;
 let ReactDOMServer;
 let ReactTestUtils;
-let act;
 
 function getTestDocument(markup) {
   const doc = document.implementation.createHTMLDocument('');
@@ -34,7 +33,6 @@ describe('ReactTestUtils', () => {
     ReactDOM = require('react-dom');
     ReactDOMServer = require('react-dom/server');
     ReactTestUtils = require('react-dom/test-utils');
-    act = ReactTestUtils.act;
   });
 
   it('Simulate should have locally attached media events', () => {
@@ -517,173 +515,4 @@ describe('ReactTestUtils', () => {
     ReactTestUtils.renderIntoDocument(<Component />);
     expect(mockArgs.length).toEqual(0);
   });
-
-  it('can use act to batch effects', () => {
-    function App(props) {
-      React.useEffect(props.callback);
-      return null;
-    }
-    const container = document.createElement('div');
-    document.body.appendChild(container);
-
-    try {
-      let called = false;
-      act(() => {
-        ReactDOM.render(
-          <App
-            callback={() => {
-              called = true;
-            }}
-          />,
-          container,
-        );
-      });
-
-      expect(called).toBe(true);
-    } finally {
-      document.body.removeChild(container);
-    }
-  });
-
-  it('flushes effects on every call', () => {
-    function App(props) {
-      let [ctr, setCtr] = React.useState(0);
-      React.useEffect(() => {
-        props.callback(ctr);
-      });
-      return (
-        <button id="button" onClick={() => setCtr(x => x + 1)}>
-          click me!
-        </button>
-      );
-    }
-
-    const container = document.createElement('div');
-    document.body.appendChild(container);
-    let calledCtr = 0;
-    act(() => {
-      ReactDOM.render(
-        <App
-          callback={val => {
-            calledCtr = val;
-          }}
-        />,
-        container,
-      );
-    });
-    const button = document.getElementById('button');
-    function click() {
-      button.dispatchEvent(new MouseEvent('click', {bubbles: true}));
-    }
-
-    act(() => {
-      click();
-      click();
-      click();
-    });
-    expect(calledCtr).toBe(3);
-    act(click);
-    expect(calledCtr).toBe(4);
-    act(click);
-    expect(calledCtr).toBe(5);
-
-    document.body.removeChild(container);
-  });
-
-  it('can use act to batch effects on updates too', () => {
-    function App() {
-      let [ctr, setCtr] = React.useState(0);
-      return (
-        <button id="button" onClick={() => setCtr(x => x + 1)}>
-          {ctr}
-        </button>
-      );
-    }
-    const container = document.createElement('div');
-    document.body.appendChild(container);
-    let button;
-    act(() => {
-      ReactDOM.render(<App />, container);
-    });
-    button = document.getElementById('button');
-    expect(button.innerHTML).toBe('0');
-    act(() => {
-      button.dispatchEvent(new MouseEvent('click', {bubbles: true}));
-    });
-    expect(button.innerHTML).toBe('1');
-    document.body.removeChild(container);
-  });
-
-  it('detects setState being called outside of act(...)', () => {
-    let setValueRef = null;
-    function App() {
-      let [value, setValue] = React.useState(0);
-      setValueRef = setValue;
-      return (
-        <button id="button" onClick={() => setValue(2)}>
-          {value}
-        </button>
-      );
-    }
-    const container = document.createElement('div');
-    document.body.appendChild(container);
-    let button;
-    act(() => {
-      ReactDOM.render(<App />, container);
-      button = container.querySelector('#button');
-      button.dispatchEvent(new MouseEvent('click', {bubbles: true}));
-    });
-    expect(button.innerHTML).toBe('2');
-    expect(() => setValueRef(1)).toWarnDev([
-      'An update to App inside a test was not wrapped in act(...).',
-    ]);
-    document.body.removeChild(container);
-  });
-
-  it('lets a ticker update', () => {
-    function App() {
-      let [toggle, setToggle] = React.useState(0);
-      React.useEffect(() => {
-        let timeout = setTimeout(() => {
-          setToggle(1);
-        }, 200);
-        return () => clearTimeout(timeout);
-      });
-      return toggle;
-    }
-    const container = document.createElement('div');
-
-    act(() => {
-      act(() => {
-        ReactDOM.render(<App />, container);
-      });
-      jest.advanceTimersByTime(250);
-    });
-
-    expect(container.innerHTML).toBe('1');
-  });
-
-  it('warns if you return a value inside act', () => {
-    expect(() => act(() => null)).toWarnDev(
-      [
-        'The callback passed to ReactTestUtils.act(...) function must not return anything.',
-      ],
-      {withoutStack: true},
-    );
-    expect(() => act(() => 123)).toWarnDev(
-      [
-        'The callback passed to ReactTestUtils.act(...) function must not return anything.',
-      ],
-      {withoutStack: true},
-    );
-  });
-
-  it('warns if you try to await an .act call', () => {
-    expect(act(() => {}).then).toWarnDev(
-      [
-        'Do not await the result of calling ReactTestUtils.act(...), it is not a Promise.',
-      ],
-      {withoutStack: true},
-    );
-  });
 });