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index.test.tsx
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index.test.tsx
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/**
*
* Tests for For
*
*/
import React from "react";
import { render } from "@utils/testUtils";
import For from "../index";
describe("<For />", () => {
const props = {
of: [{ name: "Something" }],
noParent: false,
ParentComponent: () => {
return <div data-testid="for" />;
},
renderItem: (item, idx: number) => <div key={idx}>{item.name}</div>,
};
it("should render and match the snapshot", () => {
const { baseElement } = render(<For {...props} />);
expect(baseElement).toMatchSnapshot();
});
it("should contain 1 For component", () => {
const { getAllByTestId } = render(<For {...props} />);
expect(getAllByTestId("for").length).toBe(1);
});
it("should render the number of elements passed as props and should not add another layer of dom nesting", () => {
const items = ["a", "b"];
const { findByTestId, getAllByTestId } = render(
<For
of={items}
noParent
orientation="column"
ParentComponent={props => <span {...props} data-testid="parent-span" />}
renderItem={item => <div data-testid="child">{`item: ${item}`} </div>}
/>
);
expect(findByTestId("parent-span")).not.toBe(true);
expect(getAllByTestId("child").length).toEqual(items.length);
});
it("should not render anything when items is not passed", () => {
const { findByTestId } = render(
<For {...props} renderItem={item => <div data-testid="child">{`item: ${item}`} </div>} />
);
expect(findByTestId("parent-span")).not.toBe(true);
const rendered = render(
<For {...props} renderItem={item => <div data-testid="child">{`item: ${item}`} </div>} />
);
expect(rendered.findByTestId("parent-span")).not.toBe(true);
});
});