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More typical TryFrom usage for test

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This commit is contained in:
David Tolnay 2019-07-17 12:30:21 -07:00
parent cf70c3fb05
commit b941c63a53
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1 changed files with 12 additions and 16 deletions
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28
test_suite/tests/test_annotations.rs
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@ -1590,20 +1590,20 @@ impl From<Option<u32>> for EnumToU32 {
}
#[derive(Clone, Deserialize, PartialEq, Debug)]
#[serde(try_from = "EnumToU32")]
struct StructTryFromEnum(Option<u32>);
#[serde(try_from = "u32")]
enum TryFromU32 {
One,
Two,
}
impl TryFrom<EnumToU32> for StructTryFromEnum {
impl TryFrom<u32> for TryFromU32 {
type Error = String;
fn try_from(value: EnumToU32) -> Result<Self, Self::Error> {
println!("{:?}", value);
fn try_from(value: u32) -> Result<Self, Self::Error> {
match value {
EnumToU32::One => Ok(StructTryFromEnum(Some(1))),
EnumToU32::Two => Ok(StructTryFromEnum(Some(2))),
EnumToU32::Three => Ok(StructTryFromEnum(Some(3))),
EnumToU32::Four => Ok(StructTryFromEnum(Some(4))),
_ => Err("out of range".into()),
1 => Ok(TryFromU32::One),
2 => Ok(TryFromU32::Two),
_ => Err("out of range".to_owned()),
}
}
}
@ -1616,12 +1616,8 @@ fn test_from_into_traits() {
assert_ser_tokens::<StructFromEnum>(&StructFromEnum(Some(5)), &[Token::None]);
assert_ser_tokens::<StructFromEnum>(&StructFromEnum(None), &[Token::None]);
assert_de_tokens::<StructFromEnum>(&StructFromEnum(Some(2)), &[Token::Some, Token::U32(2)]);
assert_de_tokens::<StructTryFromEnum>(
&StructTryFromEnum(Some(2)),
&[Token::Some, Token::U32(2)],
);
assert_de_tokens_error::<StructTryFromEnum>(&[Token::Some, Token::U32(5)], "out of range");
assert_de_tokens_error::<StructTryFromEnum>(&[Token::None], "out of range");
assert_de_tokens::<TryFromU32>(&TryFromU32::Two, &[Token::U32(2)]);
assert_de_tokens_error::<TryFromU32>(&[Token::U32(5)], "out of range");
}
#[test]