#[cfg(test)]
mod annotations_tests {

    extern crate windmill_macros;
    use itertools::Itertools;
    // use pep440_rs::Version;
    use windmill_macros::annotations;

    // Previous implementation.
    // We have to make sure that new one works the same as old one
    fn old(inner_content: &str) -> Annotations {
        let annotations = inner_content
            .lines()
            .take_while(|x| x.starts_with("#"))
            .map(|x| x.to_string().replace("#", "").trim().to_string())
            .collect_vec();

        let ann1: bool = annotations.contains(&"ann1".to_string());
        let ann2: bool = annotations.contains(&"ann2".to_string());
        let ann3: bool = annotations.contains(&"ann3".to_string());
        let ann4: bool = annotations.contains(&"ann4".to_string());
        let ann5: bool = annotations.contains(&"ann5".to_string());

        Annotations { ann1, ann2, ann3, ann4, ann5 }
    }

    #[annotations("#")]
    #[derive(Eq, PartialEq)]
    pub struct Annotations {
        pub ann1: bool,
        pub ann2: bool,
        pub ann3: bool,
        pub ann4: bool,
        pub ann5: bool,
    }

    #[annotations("//")]
    #[derive(Eq, PartialEq)]
    pub struct SlashedAnnotations {
        pub ann1: bool,
        pub ann2: bool,
        pub ann3: bool,
        pub ann4: bool,
    }

    #[annotations("--")]
    #[derive(Eq, PartialEq)]
    pub struct MinusedAnnotations {
        pub ann1: bool,
        pub ann2: bool,
    }

    // e.g. rust, TS and JS
    #[test]
    fn slashed_annotations() {
        let cont = "// ann1
// ann2
//ann3";
        assert_eq!(
            SlashedAnnotations { ann1: true, ann2: true, ann3: true, ann4: false },
            SlashedAnnotations::parse(cont)
        );
    }

    // e.g. Haskell, SQL
    #[test]
    fn minused_annotations() {
        let cont = "-- ann1
-- ann2";
        assert_eq!(
            MinusedAnnotations { ann1: true, ann2: true },
            MinusedAnnotations::parse(cont)
        );
    }

    #[test]
    fn simple_integration() {
        let cont = "# ann1";
        let expected = Annotations { ann1: true, ..Default::default() };
        assert_eq!(expected, old(cont));
        assert_eq!(expected, Annotations::parse(cont));
    }

    #[test]
    fn multiline_integration() {
        let cont = "# ann2
# ann3
# ann4
# ann5
            ";
        let expected = Annotations {
            ann1: false,
            ann2: true,
            ann3: true,
            ann4: true,
            ann5: true,
            //
        };
        assert_eq!(expected, old(cont));
        assert_eq!(expected, Annotations::parse(cont));
    }

    #[test]
    fn spacing_integration() {
        // First line is ignored
        {
            let cont = "
# ann2";
            let expected = Annotations { ann2: true, ..Default::default() };
            // assert_eq!(expected, old(cont));
            assert_eq!(expected, Annotations::parse(cont));
        }
        // Wrong spacing for ann3
        {
            let cont = "# ann2
                        # ann3";

            let expected = Annotations { ann2: true, ..Default::default() };
            assert_eq!(expected, old(cont));
            assert_eq!(expected, Annotations::parse(cont));
        }

        // Drunk but valid spacing
        {
            let cont = "#ann1
#                        ann2";
            let expected = Annotations { ann2: true, ann1: true, ..Default::default() };
            assert_eq!(expected, old(cont));
            assert_eq!(expected, Annotations::parse(cont));
        }
    }

    #[test]
    fn comments_inbetween_integration() {
        let cont = "# ann2
# Just comment, has nothing to do with annotations
# Another comment: ann1 ann2 ann3
# ann4 is not valid annotation
# Actual annotation next line:
# ann5

# ann3
            ";
        let expected = Annotations { ann2: true, ann5: true, ann3: true, ..Default::default() };
        // assert_eq!(expected, old(cont));
        assert_eq!(expected, Annotations::parse(cont));
    }

    #[test]
    fn hash_collision() {
        // TODO
    }
    #[test]
    fn non_matching_integration() {
        {
            let cont = r#" "ann1", ann2 "#;
            let expected = Annotations::default();
            assert_eq!(expected, old(cont));
            assert_eq!(expected, Annotations::parse(cont));
        }
        // Empty
        {
            let cont = "";
            let expected = Annotations::default();
            assert_eq!(expected, old(cont));
            assert_eq!(expected, Annotations::parse(cont));
        }
    }

    #[test]
    fn newline_between() {
        let cont = "// ann1

// ann2";
        assert_eq!(
            SlashedAnnotations { ann1: true, ann2: true, ann3: false, ann4: false },
            SlashedAnnotations::parse(cont)
        );
    }

    //     // #[derive(serde_derive::Serialize, serde_derive::Deserialize, Eq, PartialEq)]
    //     // #[annotations("#")]
    //     // pub struct SerAnnotations {
    //     //     pub ann1: bool,
    //     //     pub stt: String,
    //     // }

    //     #[test]
    //     fn non_bool_1() {
    //         let cont = r#"#ann1, stt: "hey""#;
    //         // non-bool take entire line, so you can't have one normal and than parsed.

    //         let a = SerAnnotations { ann1: false, stt: "".to_owned() };
    //         assert_eq!(a, SerAnnotations::parse(cont));
    //     }

    //     #[test]
    //     fn non_bool_2() {
    //         let cont = "#ann1, \n#stt: hey";
    //         let a = SerAnnotations { ann1: true, stt: "hey".to_owned() };
    //         assert_eq!(a, SerAnnotations::parse(cont));
    //     }

    //     #[test]
    //     fn non_bool_different_idents() {
    //         #[derive(serde_derive::Serialize, serde_derive::Deserialize, Eq, PartialEq)]
    //         #[annotations("#")]
    //         pub struct A {
    //             pub s: String,
    //         }
    //         assert_eq!(A { s: "hey".to_owned() }, A::parse("#s:hey"));
    //         assert_eq!(A { s: "hey".to_owned() }, A::parse("#s : hey"));
    //         assert_eq!(A { s: "hey".to_owned() }, A::parse("#s :hey"));
    //         assert_eq!(A { s: "hey".to_owned() }, A::parse("#s   :   hey  "));
    //         assert_eq!(A { s: "hey".to_owned() }, A::parse("#    s   :   hey  "));
    //         assert_eq!(A { s: "".to_owned() }, A::parse("  #    s   :   hey  "));
    //     }
    //     #[test]
    //     fn non_bool_unparseable_last() {
    //         #[derive(serde_derive::Serialize, serde_derive::Deserialize, Eq, PartialEq)]
    //         #[annotations("#")]
    //         pub struct A {
    //             pub v: i32,
    //         }
    //         let cont = "#v: 1\n#v: non int";
    //         let a = A {
    //             v: 1, // Should still be first, second unparsable one should have no affect on existing values
    //         };
    //         assert_eq!(a, A::parse(cont));
    //     }

    //     #[test]
    //     fn non_bool_different_types() {
    //         #[derive(serde_derive::Serialize, serde_derive::Deserialize, Eq, PartialEq)]
    //         #[annotations("#")]
    //         pub struct A {
    //             pub s: String,
    //             pub i: i32,
    //             pub o: Option<String>,
    //             pub a: Vec<i32>,
    //             pub v: Option<pep440_rs::Version>, // Custom deser
    //             pub e: E,
    //         }

    //         #[derive(
    //             serde_derive::Serialize, serde_derive::Deserialize, Eq, PartialEq, Clone, Default, Debug,
    //         )]
    //         pub enum E {
    //             #[default]
    //             One,
    //             Two(String),
    //             Three,
    //         }
    //         assert_eq!(
    //             A {
    //                 s: "foo".to_owned(),
    //                 i: 33,
    //                 o: None,
    //                 a: vec![1, 2, 3],
    //                 v: Some(Version::new([1, 0, 0])),
    //                 e: E::Three
    //             },
    //             A::parse(
    //                 "#
    // #s: foo
    // #i: 33
    // #o:
    // #a: [1, 2, 3]
    // #v: 1.0.0
    // #e: Three
    //             "
    //             )
    //         );
    //     }
}