Add unittest

Add unittest

[   31s] + ./cast
[   31s]
[   31s] running 120 tests
[   31s] test test::demoting_to::i16::from::f32 ... ok
[   31s] test test::demoting_to::i16::from::f64 ... ok
[   31s] test test::demoting_to::i16::from::i128 ... ok
[   31s] test test::demoting_to::i16::from::i32 ... ok
[   31s] test test::demoting_to::i16::from::i64 ... ok
[   31s] test test::demoting_to::i16::from::isize ... ok
[   31s] test test::demoting_to::i32::from::i128 ... ok
[   31s] test test::demoting_to::i32::from::f64 ... ok
[   31s] test test::demoting_to::i32::from::i64 ... ok
[   31s] test test::demoting_to::i64::from::i128 ... ok
[   31s] test test::demoting_to::i8::from::f32 ... ok
[   31s] test test::demoting_to::i8::from::f64 ... ok
[   31s] test test::demoting_to::i8::from::i16 ... ok
[   31s] test test::demoting_to::i8::from::i128 ... ok
[   31s] test test::demoting_to::i8::from::i64 ... ok
[   31s] test test::demoting_to::i8::from::i32 ... ok
[   31s] test test::demoting_to::i8::from::isize ... ok
[   32s] test test::demoting_to::isize::from::i128 ... ok
[   32s] test test::demoting_to::isize::from::f64 ... ok
[   32s] test test::demoting_to::isize::from::i64 ... ok
[   32s] test test::demoting_to::u16::from::f32 ... ok
[   32s] test test::demoting_to::u16::from::f64 ... ok
[   32s] test test::demoting_to::u16::from::i128 ... ok
[   32s] test test::demoting_to::u16::from::i32 ... ok
[   32s] test test::demoting_to::u16::from::i64 ... ok
[   32s] test test::demoting_to::u16::from::isize ... ok
[   32s] test test::demoting_to::u16::from::u128 ... ok
[   32s] test test::demoting_to::u16::from::u32 ... ok
[   32s] test test::demoting_to::u16::from::u64 ... ok
[   32s] test test::demoting_to::u32::from::f64 ... ok
[   32s] test test::demoting_to::u16::from::usize ... ok
[   32s] test test::demoting_to::u32::from::i64 ... ok
[   32s] test test::demoting_to::u32::from::i128 ... ok
[   32s] test test::demoting_to::u32::from::u64 ... ok
[   32s] test test::demoting_to::u32::from::u128 ... ok
[   32s] test test::demoting_to::u64::from::i128 ... ok
[   32s] test test::demoting_to::u64::from::u128 ... ok
[   32s] test test::demoting_to::u8::from::f32 ... ok
[   32s] test test::demoting_to::u8::from::f64 ... ok
[   32s] test test::demoting_to::u8::from::i128 ... ok
[   32s] test test::demoting_to::u8::from::i32 ... ok
[   32s] test test::demoting_to::u8::from::isize ... ok
[   32s] test test::demoting_to::u8::from::u128 ... ok
[   32s] test test::demoting_to::u8::from::i16 ... ok
[   32s] test test::demoting_to::u8::from::u16 ... ok
[   32s] test test::demoting_to::u8::from::i64 ... ok
[   32s] test test::demoting_to::u8::from::u64 ... ok
[   32s] test test::demoting_to::u8::from::u32 ... ok
[   32s] test test::demoting_to::u8::from::usize ... ok
[   32s] test test::demoting_to::usize::from::u128 ... ok
[   32s] test test::demoting_to::usize::from::i128 ... ok
[   32s] test test::demoting_to::usize::from::i64 ... ok
[   32s] test test::demoting_to::usize::from::u64 ... ok
[   32s] test test::f32::inf::to::i32 ... ok
[   32s] test test::f32::inf::to::i16 ... ok
[   32s] test test::f32::inf::to::i128 ... ok
[   32s] test test::f32::inf::to::i8 ... ok
[   32s] test test::f32::inf::to::isize ... ok
[   32s] test test::demoting_to::usize::from::f64 ... ok
[   32s] test test::f32::inf::to::i64 ... ok
[   32s] test test::f32::inf::to::u128 ... ok
[   32s] test test::f32::inf::to::u16 ... ok
[   32s] test test::f32::inf::to::u64 ... ok
[   32s] test test::f32::inf::to::u32 ... ok
[   32s] test test::f32::inf::to::u8 ... ok
[   32s] test test::f32::inf::to::usize ... ok
[   32s] test test::f32::nan::to::i32 ... ok
[   32s] test test::f32::nan::to::i16 ... ok
[   32s] test test::f32::nan::to::i128 ... ok
[   32s] test test::f32::nan::to::isize ... ok
[   32s] test test::f32::nan::to::i64 ... ok
[   32s] test test::f32::nan::to::u128 ... ok
[   32s] test test::f32::nan::to::i8 ... ok
[   32s] test test::f32::nan::to::u32 ... ok
[   32s] test test::f32::nan::to::u64 ... ok
[   32s] test test::f32::nan::to::u16 ... ok
[   32s] test test::f32::nan::to::usize ... ok
[   32s] test test::f64::inf::to::i16 ... ok
[   32s] test test::f32::nan::to::u8 ... ok
[   32s] test test::f64::inf::to::i128 ... ok
[   32s] test test::f64::inf::to::i32 ... ok
[   32s] test test::f64::inf::to::i64 ... ok
[   32s] test test::f64::inf::to::u128 ... ok
[   32s] test test::f64::inf::to::u16 ... ok
[   32s] test test::f64::inf::to::isize ... ok
[   32s] test test::f64::inf::to::u64 ... ok
[   32s] test test::f64::inf::to::u8 ... ok
[   32s] test test::f64::inf::to::usize ... ok
[   32s] test test::f64::inf::to::i8 ... ok
[   32s] test test::f64::nan::to::i128 ... ok
[   32s] test test::f64::inf::to::u32 ... ok
[   32s] test test::f64::nan::to::i16 ... ok
[   32s] test test::f64::nan::to::i64 ... ok
[   32s] test test::f64::nan::to::isize ... ok
[   32s] test test::f64::nan::to::u32 ... ok
[   32s] test test::f64::nan::to::u64 ... ok
[   32s] test test::f64::nan::to::u128 ... ok
[   32s] test test::f64::nan::to::i8 ... ok
[   32s] test test::gh15 ... ok
[   32s] test test::gh16 ... ok
[   32s] test test::gh23_lossless_integer_max_min_to_float ... ok
[   32s] test test::f64::nan::to::u8 ... ok
[   32s] test test::f64::nan::to::usize ... ok
[   32s] test test::f64::nan::to::u16 ... ok
[   32s] test test::f64::nan::to::i32 ... ok
[   32s] test test::symmetric_cast_between::u16::and::i16 ... ok
[   32s] test test::symmetric_cast_between::u32::and::i32 ... ok
[   32s] test test::symmetric_cast_between::u32::and::i8 ... ok
[   32s] test test::symmetric_cast_between::u32::and::i16 ... ok
[   32s] test test::symmetric_cast_between::u16::and::i8 ... ok
[   32s] test test::symmetric_cast_between::u64::and::i64 ... ok
[   32s] test test::symmetric_cast_between::u64::and::i16 ... ok
[   32s] test test::symmetric_cast_between::u64::and::i32 ... ok
[   32s] test test::symmetric_cast_between::u8::and::i8 ... ok
[   32s] test test::symmetric_cast_between::u64::and::i8 ... ok
[   32s] test test::symmetric_cast_between::u64::and::isize ... ok
[   32s] test test::symmetric_cast_between::usize::and::i32 ... ok
[   32s] test test::symmetric_cast_between::usize::and::i16 ... ok
[   32s] test test::test_fl_conversion ... ok
[   32s] test test::symmetric_cast_between::usize::and::i8 ... ok
[   32s]
[   32s] test result: ok. 120 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s