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kotlinlang

Is there any way to mock a extension function with Mockito?

Perhaps instead of mocking you could re-define the extension method, taking advantage of how kotlin resolves them?

For example, if you have this in `Extensions.kt`:

```
fun String.doSomething(): String = this.reversed()
```

And then you could override that in your test method because you can define local functions...

```
fun mocked() {
    fun String.doSomething(): String = this.toUpperCase()
    println("abc".doSomething())
}
```

That way, when you call `doSomething()` in `mocked()`, it uses the version closest in scope to it (which will uppercase it in this example)

If I redefine it in my test, and class A which I'm testing is using the one from the import, then it still gets overridden with the one in the test?

Ah, my bad. I totally misread your question. I'm sorry.