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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| import React from "react"; | ||
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|
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| import { render } from "react-testing-library"; | ||
| import useWindowSize from "../useWindowSize"; | ||
| function Comp() { | ||
| const { innerHeight, innerWidth, outerHeight, outerWidth } = useWindowSize(); | ||
| return ( | ||
| <div> | ||
| <div> | ||
| innerHeight: | ||
| {innerHeight} | ||
| </div> | ||
| <div> | ||
| innerWidth: | ||
| {innerWidth} | ||
| </div> | ||
| <div> | ||
| outerHeight: | ||
| {outerHeight} | ||
| </div> | ||
| <div> | ||
| outerWidth: | ||
| {outerWidth} | ||
| </div> | ||
| </div> | ||
| ); | ||
| } | ||
|
|
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| test("that it renders online", () => { | ||
| const { getByText } = render(<Comp />); | ||
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|
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| expect(getByText(/innerHeight:*768/)).toBeInTheDocument(); | ||
| expect(getByText(/innerWidth:*1024/)).toBeInTheDocument(); | ||
| expect(getByText(/outerHeight:*768/)).toBeInTheDocument(); | ||
| expect(getByText(/outerWidth:*1024/)).toBeInTheDocument(); | ||
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|
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| global.innerHeight = 501; | ||
| global.innerWidth = 500; | ||
| global.outerHeight = 502; | ||
| global.outerWidth = 503; | ||
| // Trigger the window resize event. | ||
| global.window.dispatchEvent(new Event("resize")); | ||
|
|
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| expect(getByText(/innerHeight:*501/)).toBeInTheDocument(); | ||
| expect(getByText(/innerWidth:*500/)).toBeInTheDocument(); | ||
| expect(getByText(/outerHeight:*502/)).toBeInTheDocument(); | ||
| expect(getByText(/outerWidth:*503/)).toBeInTheDocument(); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| import React from "react"; | ||
|
|
||
| function getSize() { | ||
| return { | ||
| innerHeight: window.innerHeight, | ||
| innerWidth: window.innerWidth, | ||
| outerHeight: window.outerHeight, | ||
| outerWidth: window.outerWidth, | ||
| }; | ||
| } | ||
|
|
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| function useWindowSize() { | ||
| const [windowSize, setWindowSize] = React.useState(getSize()); | ||
|
|
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| function handleResize() { | ||
| setWindowSize(getSize()); | ||
| } | ||
|
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| React.useEffect(() => { | ||
| window.addEventListener("resize", handleResize); | ||
| return () => { | ||
| window.removeEventListener("resize", handleResize); | ||
| }; | ||
| }, []); | ||
|
|
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| return windowSize; | ||
| } | ||
|
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| export default useWindowSize; |
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