chore: make tests compatible with Jest 24

Author: SimenB

package.json

@@ -4,12 +4,12 @@
     "packages/*"
   ],
   "devDependencies": {
+    "@mattiasbuelens/web-streams-polyfill": "0.1.0",
     "art": "^0.10.1",
     "babel-cli": "^6.6.5",
     "babel-code-frame": "^6.26.0",
     "babel-core": "^6.0.0",
     "babel-eslint": "^10.0.0",
-    "babel-jest": "^23.0.1",
     "babel-plugin-check-es2015-constants": "^6.5.0",
     "babel-plugin-external-helpers": "^6.22.0",
     "babel-plugin-syntax-trailing-function-commas": "^6.5.0",
@@ -83,8 +83,7 @@
     "targz": "^1.0.1",
     "through2": "^2.0.0",
     "tmp": "~0.0.28",
-    "typescript": "~1.8.10",
-    "@mattiasbuelens/web-streams-polyfill": "0.1.0"
+    "typescript": "~1.8.10"
   },
   "devEngines": {
     "node": "8.x || 9.x || 10.x || 11.x || 12.x"

packages/eslint-plugin-react-hooks/__tests__/ESLintRuleExhaustiveDeps-test.js

@@ -521,7 +521,7 @@ const tests = {
       // Valid because the ref is captured.
       code: `
         function useMyThing(myRef) {
-          const myRef = useRef();
+          myRef = useRef();
           useEffect(() => {
             const handleMove = () => {};
             const node = myRef.current;

packages/eslint-plugin-react-hooks/__tests__/ESLintRulesOfHooks-test.js

@@ -95,7 +95,7 @@ eslintTester.run('react-hooks', ReactHooksESLintRule, {
       useHook2 = () => { useState(); };
       ({useHook: () => { useState(); }});
       ({useHook() { useState(); }});
-      const {useHook = () => { useState(); }} = {};
+      const {useHook3 = () => { useState(); }} = {};
       ({useHook = () => { useState(); }} = {});
     `,
     `

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

@@ -648,7 +648,7 @@ describe('ReactDOMServerIntegration', () => {
       });
     });
 
-    describe('component hierarchies', async function() {
+    describe('component hierarchies', function() {
       itRenders('single child hierarchies of components', async render => {
         const Component = props => <div>{props.children}</div>;
         let e = await render(

packages/react-test-renderer/src/__tests__/ReactTestRendererAsync-test.js

@@ -160,7 +160,7 @@ describe('ReactTestRendererAsync', () => {
 
       expect(() =>
         expect(Scheduler).toFlushAndYieldThrough(['foo', 'baz']),
-      ).toThrow('Expected value to equal:');
+      ).toThrow('// deep equality');
     });
 
     it('toFlushAndYield', () => {
@@ -181,7 +181,7 @@ describe('ReactTestRendererAsync', () => {
       );
 
       expect(() => expect(Scheduler).toFlushWithoutYielding()).toThrowError(
-        'Expected value to equal:',
+        '// deep equality',
       );
 
       renderer.update(
@@ -193,7 +193,7 @@ describe('ReactTestRendererAsync', () => {
       );
 
       expect(() => expect(Scheduler).toFlushAndYield(['foo', 'baz'])).toThrow(
-        'Expected value to equal:',
+        '// deep equality',
       );
     });
 
@@ -254,7 +254,7 @@ describe('ReactTestRendererAsync', () => {
 
     ReactTestRenderer.create(<App />);
     expect(() => expect(Scheduler).toHaveYielded(['A', 'B'])).toThrow(
-      'Expected value to equal:',
+      '// deep equality',
     );
   });
 

packages/react/src/__tests__/ReactCoffeeScriptClass-test.coffee

@@ -543,3 +543,4 @@ describe 'ReactCoffeeScriptClass', ->
     node = ReactDOM.findDOMNode(instance)
     expect(node).toBe container.firstChild
     undefined
+  undefined

packages/react/src/__tests__/createReactClassIntegration-test.js

@@ -453,7 +453,7 @@ describe('create-react-class-integration', () => {
     expect(() =>
       ReactDOM.render(<Foo foo="foo" />, document.createElement('div')),
     ).toWarnDev(
-      'Component: getDerivedStateFromProps() is defined as an instance method ' +
+      'Foo: getDerivedStateFromProps() is defined as an instance method ' +
         'and will be ignored. Instead, declare it as a static method.',
       {withoutStack: true},
     );
@@ -471,7 +471,7 @@ describe('create-react-class-integration', () => {
     expect(() =>
       ReactDOM.render(<Foo foo="foo" />, document.createElement('div')),
     ).toWarnDev(
-      'Component: getDerivedStateFromError() is defined as an instance method ' +
+      'Foo: getDerivedStateFromError() is defined as an instance method ' +
         'and will be ignored. Instead, declare it as a static method.',
       {withoutStack: true},
     );
@@ -491,7 +491,7 @@ describe('create-react-class-integration', () => {
     expect(() =>
       ReactDOM.render(<Foo foo="foo" />, document.createElement('div')),
     ).toWarnDev(
-      'Component: getSnapshotBeforeUpdate() is defined as a static method ' +
+      'Foo: getSnapshotBeforeUpdate() is defined as a static method ' +
         'and will be ignored. Instead, declare it as an instance method.',
       {withoutStack: true},
     );

scripts/jest/preprocessor.js

@@ -70,7 +70,7 @@ module.exports = {
               }
             : {}
         )
-      ).code;
+      );
     }
     return src;
   },