Grcov report - options.rs

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use ron::{extensions::Extensions, ser::PrettyConfig, Options};

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use serde::{Deserialize, Serialize};

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#[derive(Serialize, Deserialize)]

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struct Newtype(f64);

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#[derive(Serialize, Deserialize)]

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struct Struct(Option<u32>, Newtype);

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#[test]

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fn default_options() {

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    let ron = Options::default();

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    let de: Struct = ron.from_str("(Some(42),(4.2))").unwrap();

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    let ser = ron.to_string(&de).unwrap();

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    assert_eq!(ser, "(Some(42),(4.2))");

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4

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#[test]

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fn without_any_options() {

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    let mut ron = Options::default().with_default_extension(Extensions::all());

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    for extension in Extensions::all().iter() {

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        ron = ron.without_default_extension(extension);

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16

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    let de: Struct = ron.from_str("(Some(42),(4.2))").unwrap();

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    let ser = ron.to_string(&de).unwrap();

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    assert_eq!(ser, "(Some(42),(4.2))");

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4

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#[test]

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fn single_default_extension() {

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    let ron = Options::default().with_default_extension(Extensions::IMPLICIT_SOME);

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    let de: Struct = ron.from_str("(42,(4.2))").unwrap();

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    let ser = ron.to_string(&de).unwrap();

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    assert_eq!(ser, "(42,(4.2))");

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    let de: Struct = ron.from_str("#![enable(implicit_some)](42,(4.2))").unwrap();

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    let ser = ron.to_string(&de).unwrap();

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    assert_eq!(ser, "(42,(4.2))");

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    let de: Struct = ron

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        .from_str("#![enable(implicit_some)]#![enable(unwrap_newtypes)](42,4.2)")

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        .unwrap();

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    let ser = ron.to_string(&de).unwrap();

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    assert_eq!(ser, "(42,(4.2))");

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    let de: Struct = ron

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        .from_str("#![enable(implicit_some)]#![enable(unwrap_newtypes)](42,4.2)")

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        .unwrap();

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    let ser = ron

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        .to_string_pretty(

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            &de,

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            PrettyConfig::default().extensions(Extensions::UNWRAP_NEWTYPES),

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        .unwrap();

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    assert_eq!(ser, "#![enable(unwrap_newtypes)]\n(42, 4.2)");

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#[cfg(feature = "std")]

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#[test]

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fn reader_io_error() {

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    struct Reader<'a> {

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        buf: &'a [u8],

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    impl<'a> std::io::Read for Reader<'a> {

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        fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {

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            let written = self.buf.read(buf)?;

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            if written == 0 {

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                Err(std::io::Error::new(std::io::ErrorKind::BrokenPipe, "oh no"))

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            } else {

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                Ok(written)

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    assert_eq!(

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        ron::de::from_reader::<Reader, ()>(Reader { buf: b"" }).unwrap_err(),

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        ron::error::SpannedError {

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            code: ron::Error::Io(String::from("oh no")),

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            position: ron::error::Position { line: 1, col: 1 },

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);

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    assert_eq!(

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        ron::de::from_reader::<Reader, ()>(Reader { buf: b"hello" }).unwrap_err(),

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        ron::error::SpannedError {

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            code: ron::Error::Io(String::from("oh no")),

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            position: ron::error::Position { line: 1, col: 6 },

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);

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    assert_eq!(

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        ron::de::from_reader::<Reader, ()>(Reader {

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            buf: b"hello\nmy \xff"

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})

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        .unwrap_err(),

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        ron::error::SpannedError {

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            code: ron::Error::Io(String::from("oh no")),

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            position: ron::error::Position { line: 2, col: 4 },

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);

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