Function decreasesButNotByFunc

Export assertion functions

decreasesButNotByFunc<R, T = any>(
    this: IAssertScope,
    getter: T | (() => any),
    prop?: keyof T,
    delta?: number | MsgSource,
    evalMsg?: MsgSource,
): R
Asserts that executing the target function decreases the monitored value but NOT by the specific delta. The value MUST decrease, but the decrease amount must not equal the specified delta.
Type Parameters
- R
- T = any
Parameters
- this: IAssertScope
  The current IAssertScope object
- getter: T | (() => any)
  A function that returns a value to monitor, or an object containing the property to monitor
- Optionalprop: keyof T
  The property name to monitor (only used when first argument is an object)
- Optionaldelta: number | MsgSource
  The delta that should NOT match. This should be a positive value as a decrease is expected.
- OptionalevalMsg: MsgSource
  Optional message to display if the assertion fails
Returns R
The current IAssertScope.that object
- Defined in assert/funcs/changesBy.ts:360