# ArgumentMatcher

Basic Rule to match any statement with Mockito is to correctly match its parameters. If any of the parameter did not match then instruction will not be mocked.

```java
// example statement
final int addition = calculator.getAddition(2, 3);

// you have to match exact parameters, in this case (2,3)
Mockito.when(mckCalculator.getAddition(2, 3)).thenReturn(5);

// If you mock for (3,4), you mocked result will not be returned
Mockito.when(mckCalculator.getAddition(3, 4)).thenReturn(5);

// For cases, where you do not know exact parameter then you can use Mockito.anyInt()
Mockito.when(mckCalculator.getAddition(Mockito.anyInt(), Mockito.anyInt())).thenReturn(5);
```

Similarly we have `Mockito.any()`, `Mockito.anyLong()`, `Mockito.anyString()`, `Mockito.anyBoolean()`, `Mockito.anyByte()`, `Mockito.anyChar()`, `Mockito.anyFloat()`, `Mockito.anyDouble()`, `Mockito.anyShort()`, `Mockito.anyList()`, `Mockito.anySet()` and `Mockito.anyMap()`