method default.CallTracker.prototype.calls
Usage in Deno
```typescript import mod from "node:node__assert.d.ts"; ```
CallTracker.prototype.calls(exact?: number): () => void
The wrapper function is expected to be called exactly `exact` times. If the
function has not been called exactly `exact` times when `tracker.verify()` is called, then `tracker.verify()` will throw an
error.
```js
import assert from 'node:assert';
// Creates call tracker.
const tracker = new assert.CallTracker();
function func() {}
// Returns a function that wraps func() that must be called exact times
// before tracker.verify().
const callsfunc = tracker.calls(func);
```
() => void
A function that wraps `fn`.