map-override

The map-override snippet overrides functions under Map.prototype to change their behaviour.

Name	Description	Mandatory	Default
method	The Map function to override: `set`, `get`, `has`.	Yes	n.a.
needle	String or regex used to determine which calls to trap. For `set` this matches the value. For `get` and `has` this matches the key.	Yes	n.a.
returnValue	The return value for matched calls. For `get` — value to return. For `has` — true or false.	No	''
path	Path to look for the needle. Only relevant for `set` when checking object values.	No	''
stack	Comma separated list of strings to check in stack trace.	No	''

Filter	Result
`map-override set test`	Ignores `map.set("key", "test")`.
`map-override set /first.*second/`	Ignores calls where value matches the regex.
`map-override get key1 customValue`	`map.get("key1")` always returns "customValue".
`map-override has key1 false`	`map.has("key1")` always returns false.
`map-override set test '' '' ads.js`	Ignores `map.set` with value "test" only for ads.js.

Message	When	Definition
`Wrapped Map.prototype.set/get/has`	After wrapping	Calls are intercepted.
`Map.set is ignored for value matching needle`	Needle matches set call	The set call was ignored.
`Map.get returned >>returnValue>> for key`	Needle matches get call	get returned the overridden value.
`Map.has returned >>returnValue>> for key`	Needle matches has call	has returned the overridden value.