assertcheck v1.0.0

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assertcheck / assert / sumBy

Function: sumBy()

function sumBy<T>(
   arr, 
   iteratee, 
   expected, 
   opts?): void;

Defined in: src/assert.ts:1285

Asserts that _.sumBy(arr, iteratee) equals expected — Ruby arr.sum.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
arr	T[]
iteratee	string | ((value) => number)
expected	number
opts?	Opts

Returns

void

Example

`assert.sumBy(lineItems, "totalCents", invoiceTotal, "line items must match invoice")`