Function addAssertFunc

addAssertFunc(
    target: any,
    name: string,
    fnDef: AssertClassDef,
    responseHandler?: (result: any) => any,
): void
Adds a new assertion function to the Assert "class" (function).
Parameters
- target: any
- name: string
  The name of the function to add.
- fnDef: AssertClassDef
  The definition of the function to add, this can be a string (is.object), an array of strings (["is", "obejct"]) which identify the sequence of operations to perform or a IScopeFn function, or an IAssertClassDef object.
- OptionalresponseHandler: (result: any) => any
Returns void
Throws
AssertionError - If the definition is invalid.
Example
```
addAssertFunc("isPositive", (value) => this._context.eval(value > 0, "Expected a positive number"));

assert.isPositive(1); // Passes
assert.isPositive(0); // Fails - throws an AssertionFailure
```
Since
0.1.0
- Defined in assert/assertClass.ts:235