Here are most, of the cases I could come up with:

```
isFinite(100) => true
isFinite(0) => true
isFinite(-100) => true
isFinite(1.3) => true
isFinite(1/0) => false
isFinite(NaN) => false
isFinite("100") => true
isFinite("-34.3") => true
isFinite(null) => true
isFinite(undefined) => false
isFinite("abc") => false
isFinite(1e3) => true
isFinite("1e3") => true
```