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Diffstat (limited to 'vendor/derive_more/tests/try_into.rs')
| -rw-r--r-- | vendor/derive_more/tests/try_into.rs | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/vendor/derive_more/tests/try_into.rs b/vendor/derive_more/tests/try_into.rs new file mode 100644 index 000000000..837c8e991 --- /dev/null +++ b/vendor/derive_more/tests/try_into.rs @@ -0,0 +1,199 @@ +#![allow(dead_code)] + +#[macro_use] +extern crate derive_more; + +use std::convert::{TryFrom, TryInto}; + +// Ensure that the TryFrom macro is hygenic and doesn't break when `Result` has +// been redefined. +type Result = (); + +#[derive(Clone, Copy, TryInto)] +#[try_into(owned, ref, ref_mut)] +enum MixedInts { + SmallInt(i32), + NamedBigInt { + int: i64, + }, + UnsignedWithIgnoredField(#[try_into(ignore)] bool, i64), + NamedUnsignedWithIgnnoredField { + #[try_into(ignore)] + useless: bool, + x: i64, + }, + TwoSmallInts(i32, i32), + NamedBigInts { + x: i64, + y: i64, + }, + Unsigned(u32), + NamedUnsigned { + x: u32, + }, + Unit, + #[try_into(ignore)] + Unit2, +} + +#[test] +fn test_try_into() { + let mut i = MixedInts::SmallInt(42); + assert_eq!(Ok(42i32), i.try_into()); + assert_eq!(Ok(&42i32), (&i).try_into()); + assert_eq!(Ok(&mut 42i32), (&mut i).try_into()); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!( + <(i32, i32)>::try_from(i), + Err("Only TwoSmallInts can be converted to (i32, i32)") + ); + assert_eq!( + <(i64, i64)>::try_from(i), + Err("Only NamedBigInts can be converted to (i64, i64)") + ); + assert_eq!( + u32::try_from(i), + Err("Only Unsigned, NamedUnsigned can be converted to u32") + ); + assert_eq!(<()>::try_from(i), Err("Only Unit can be converted to ()")); + + let mut i = MixedInts::NamedBigInt { int: 42 }; + assert_eq!( + i32::try_from(i), + Err("Only SmallInt can be converted to i32") + ); + assert_eq!(Ok(42i64), i.try_into()); + assert_eq!(Ok(&42i64), (&i).try_into()); + assert_eq!(Ok(&mut 42i64), (&mut i).try_into()); + assert_eq!( + <(i32, i32)>::try_from(i), + Err("Only TwoSmallInts can be converted to (i32, i32)") + ); + assert_eq!( + <(i64, i64)>::try_from(i), + Err("Only NamedBigInts can be converted to (i64, i64)") + ); + assert_eq!( + u32::try_from(i), + Err("Only Unsigned, NamedUnsigned can be converted to u32") + ); + assert_eq!(<()>::try_from(i), Err("Only Unit can be converted to ()")); + + let mut i = MixedInts::TwoSmallInts(42, 64); + assert_eq!( + i32::try_from(i), + Err("Only SmallInt can be converted to i32") + ); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!(Ok((42i32, 64i32)), i.try_into()); + assert_eq!(Ok((&42i32, &64i32)), (&i).try_into()); + assert_eq!(Ok((&mut 42i32, &mut 64i32)), (&mut i).try_into()); + assert_eq!( + <(i64, i64)>::try_from(i), + Err("Only NamedBigInts can be converted to (i64, i64)") + ); + assert_eq!( + u32::try_from(i), + Err("Only Unsigned, NamedUnsigned can be converted to u32") + ); + assert_eq!(<()>::try_from(i), Err("Only Unit can be converted to ()")); + + let mut i = MixedInts::NamedBigInts { x: 42, y: 64 }; + assert_eq!( + i32::try_from(i), + Err("Only SmallInt can be converted to i32") + ); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!( + <(i32, i32)>::try_from(i), + Err("Only TwoSmallInts can be converted to (i32, i32)") + ); + assert_eq!(Ok((42i64, 64i64)), i.try_into()); + assert_eq!(Ok((&42i64, &64i64)), (&i).try_into()); + assert_eq!(Ok((&mut 42i64, &mut 64i64)), (&mut i).try_into()); + assert_eq!( + u32::try_from(i), + Err("Only Unsigned, NamedUnsigned can be converted to u32") + ); + assert_eq!(<()>::try_from(i), Err("Only Unit can be converted to ()")); + + let mut i = MixedInts::Unsigned(42); + assert_eq!( + i32::try_from(i), + Err("Only SmallInt can be converted to i32") + ); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!( + <(i32, i32)>::try_from(i), + Err("Only TwoSmallInts can be converted to (i32, i32)") + ); + assert_eq!( + <(i64, i64)>::try_from(i), + Err("Only NamedBigInts can be converted to (i64, i64)") + ); + assert_eq!(Ok(42u32), i.try_into()); + assert_eq!(Ok(&42u32), (&i).try_into()); + assert_eq!(Ok(&mut 42u32), (&mut i).try_into()); + assert_eq!(<()>::try_from(i), Err("Only Unit can be converted to ()")); + + let mut i = MixedInts::NamedUnsigned { x: 42 }; + assert_eq!( + i32::try_from(i), + Err("Only SmallInt can be converted to i32") + ); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!( + <(i32, i32)>::try_from(i), + Err("Only TwoSmallInts can be converted to (i32, i32)") + ); + assert_eq!( + <(i64, i64)>::try_from(i), + Err("Only NamedBigInts can be converted to (i64, i64)") + ); + assert_eq!(Ok(42u32), i.try_into()); + assert_eq!(Ok(&42u32), (&i).try_into()); + assert_eq!(Ok(&mut 42u32), (&mut i).try_into()); + assert_eq!(<()>::try_from(i), Err("Only Unit can be converted to ()")); + + let i = MixedInts::Unit; + assert_eq!( + i32::try_from(i), + Err("Only SmallInt can be converted to i32") + ); + assert_eq!( + i64::try_from(i), + Err("Only NamedBigInt, UnsignedWithIgnoredField, NamedUnsignedWithIgnnoredField can be converted to i64") + ); + assert_eq!( + <(i32, i32)>::try_from(i), + Err("Only TwoSmallInts can be converted to (i32, i32)") + ); + assert_eq!( + <(i64, i64)>::try_from(i), + Err("Only NamedBigInts can be converted to (i64, i64)") + ); + assert_eq!( + u32::try_from(i), + Err("Only Unsigned, NamedUnsigned can be converted to u32") + ); + assert_eq!(Ok(()), i.try_into()); +} |