Function lengthFunc

Export assertion functions

lengthFunc<R>(this: IAssertScope, length: number, evalMsg?: MsgSource): R
Asserts that the target has a length or size property equal to the given number. Works with arrays, strings, Maps, Sets, and any object with a length or size property.
Type Parameters
- R
Parameters
- this: IAssertScope
  The assert scope.
- length: number
  The expected length or size.
- OptionalevalMsg: MsgSource
  The message to display if the assertion fails.
Returns R
- The assert scope.
Since
0.1.5
Example
```
import { assert } from "@nevware21/tripwire";

assert([1, 2, 3]).has.lengthOf(3);           // Passes - array length is 3
assert("hello").has.lengthOf(5);             // Passes - string length is 5
assert(new Map([["a", 1]])).has.lengthOf(1); // Passes - Map size is 1
assert(new Set([1, 2])).has.lengthOf(2);     // Passes - Set size is 2
assert([1, 2]).has.lengthOf(3);              // Fails - array length is 2, not 3
```
- Defined in assert/funcs/length.ts:32