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import { diffStringsUnified } from "jest-diff";
expect.extend({
toCloselyEqualPoints(received, expected, precision) {
if (!Array.isArray(received) || !Array.isArray(expected)) {
throw new Error("expected and received are not point arrays");
}
const COMPARE = 1 / Math.pow(10, precision || 2);
const pass = expected.every(
(point, idx) =>
Math.abs(received[idx]?.[0] - point[0]) < COMPARE &&
Math.abs(received[idx]?.[1] - point[1]) < COMPARE,
);
if (!pass) {
return {
message: () => ` The provided array of points are not close enough.
${diffStringsUnified(
JSON.stringify(expected, undefined, 2),
JSON.stringify(received, undefined, 2),
)}`,
pass: false,
};
}
return {
message: () => `expected ${received} to not be close to ${expected}`,
pass: true,
};
},
});
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