# TestCanisterHandlers

> **TestCanisterHandlers**\<`A`\> = `{ [M in FunctionName<A>]?: TestCanisterHandler<A, M> }`

Defined in: [core/src/testing/test-canister.ts:35](https://github.com/B3Pay/ic-reactor/blob/f1956947ae037304fce1675a38695964c1aa9e32/packages/core/src/testing/test-canister.ts#L35)

The handlers of a test canister, by method name. A method left out rejects
every call to it.

## Type Parameters

### A

`A`