toBeWithin jest
expect.extend({
toBeWithinRange(received, floor, ceiling) {
const pass = received >= floor && received <= ceiling;
if (pass) {
return {
message: () =>
`expected ${received} not to be within range ${floor} - ${ceiling}`,
pass: true,
};
} else {
return {
message: () =>
`expected ${received} to be within range ${floor} - ${ceiling}`,
pass: false,
};
}
},
});
test('numeric ranges', () => {
expect(100).toBeWithinRange(90, 110);
expect(101).not.toBeWithinRange(0, 100);
expect({apples: 6, bananas: 3}).toEqual({
apples: expect.toBeWithinRange(1, 10),
bananas: expect.not.toBeWithinRange(11, 20),
});
});
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