Implement test.each and describe.each

[Electroid]

• https://jestjs.io/docs/api#testeachtablename-fn-timeout
• https://jestjs.io/docs/api#describeeachtablename-fn-timeout

import { test, expect } from "bun:test"; 

test.each([
  [1, 1, 2],
  [1, 2, 3],
  [2, 1, 3],
])('.add(%i, %i)', (a, b, expected) => {
  expect(a + b).toBe(expected);
});

test.each([
  {a: 1, b: 1, expected: 2},
  {a: 1, b: 2, expected: 3},
  {a: 2, b: 1, expected: 3},
])('.add($a, $b)', ({a, b, expected}) => {
  expect(a + b).toBe(expected);
});

test.each`
  a    | b    | expected
  ${1} | ${1} | ${2}
  ${1} | ${2} | ${3}
  ${2} | ${1} | ${3}
`('returns $expected when $a is added to $b', ({a, b, expected}) => {
  expect(a + b).toBe(expected);
});

[wojtekmaj]

Why is this still open? It looks like it's available, only missing documentation?

[Jarred-Sumner]

Good question. It is available. Our documentation is out of date.

[coodoo]

@Jarred-Sumner Just ran following test copied directly from above doc and seemed $a and $b were not substituted correctly, is this expected behavior or known issue?

test.each([
  {a: 1, b: 1, expected: 2},
  {a: 1, b: 2, expected: 3},
  {a: 2, b: 1, expected: 3},
])('.add($a, $b)', ({a, b, expected}) => {
  expect(a + b).toBe(expected);
})

and got this result:

bun test v1.1.4 (fbe2fe0c)

z.test.js:
✓ .add($a, $b) [1.30ms]
✓ .add($a, $b) [0.02ms]
✓ .add($a, $b)

 3 pass
 0 fail
 3 expect() calls
Ran 3 tests across 1 files. [266.00ms]

I would expect the result should be

bun test v1.1.4 (fbe2fe0c)

z.test.js:
✓ .add(1, 1) [1.30ms]
✓ .add(1, 2) [0.02ms]
✓ .add(1, 1)

 3 pass
 0 fail
 3 expect() calls
Ran 3 tests across 1 files. [266.00ms]

[coodoo]

and seemed this is a known issue being tracked.