mdtablefix 0.4.0

`mdtablefix` unb0rks and reflows Markdown tables so that each column has a uniform width. When the `--wrap` option is used, it also wraps paragraphs and list items to 80 columns.
Documentation 
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//! Tests for fence normalisation functionality.

#[macro_use]
mod prelude;
use mdtablefix::{attach_orphan_specifiers, compress_fences};
use rstest::rstest;

#[test]
fn compresses_backtick_fences() {
    let input = lines_vec!["````rust", "code", "````"];
    let out = compress_fences(&input);
    assert_eq!(out, lines_vec!["```rust", "code", "```"]);
}

#[test]
fn compresses_indented_backticks() {
    let input = lines_vec!["    `````foo,bar   "];
    let out = compress_fences(&input);
    assert_eq!(out, lines_vec!["    ```foo,bar"]);
}

#[test]
fn compresses_tilde_fences() {
    let input = lines_vec!["~~~~rust", "code", "~~~~"];
    let out = compress_fences(&input);
    assert_eq!(out, lines_vec!["```rust", "code", "```"]);
}

#[test]
fn does_not_compress_mixed_fences() {
    let input = lines_vec!["~~~rust", "code", "```"];
    let out = compress_fences(&input);
    assert_eq!(out, lines_vec!["```rust", "code", "```"]);

    let input2 = lines_vec!["```rust", "code", "~~~"];
    let out2 = compress_fences(&input2);
    assert_eq!(out2, lines_vec!["```rust", "code", "```"]);
}

#[test]
fn leaves_other_lines_untouched() {
    let input = lines_vec!["~~", "``text``"];
    let out = compress_fences(&input);
    assert_eq!(out, input);
}

#[test]
fn fixes_orphaned_specifier() {
    let input = lines_vec!["Rust", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}

#[test]
fn attaches_orphan_specifier_unit() {
    let input = lines_vec!["Rust", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&input);
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}

#[test]
fn attaches_orphan_specifier_with_blank_line_unit() {
    let input = lines_vec!["Rust", "", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&input);
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}

#[test]
fn fixes_orphaned_specifier_with_blank_line() {
    let input = lines_vec!["Rust", "", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}

#[test]
fn fixes_multiple_orphaned_specifiers() {
    let input = lines_vec![
        "Rust",
        "```",
        "fn main() {}",
        "```",
        "",
        "Python",
        "```",
        "print('hi')",
        "```",
    ];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(
        out,
        lines_vec![
            "```rust",
            "fn main() {}",
            "```",
            "",
            "```python",
            "print('hi')",
            "```"
        ]
    );
}

#[test]
fn does_not_attach_non_orphan_lines_before_fences() {
    let input = lines_vec![
        "Rust code",
        "```",
        "fn main() {}",
        "```",
        "rust!",
        "```",
        "println!(\"hi\");",
        "```",
    ];
    let out = attach_orphan_specifiers(&input);
    assert_eq!(out, input);
}

#[test]
fn does_not_overwrite_existing_fence() {
    let input = lines_vec!["ruby", "```rust", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["ruby", "```rust", "fn main() {}", "```"]);
}

#[test]
fn does_not_attach_specifier_without_preceding_blank_line() {
    let input = lines_vec!["intro", "Rust", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(
        out,
        lines_vec!["intro", "Rust", "```", "fn main() {}", "```"]
    );
}

#[test]
fn attaches_orphan_specifier_with_symbols() {
    let input = lines_vec!["C++", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```c++", "fn main() {}", "```"]);
}

#[test]
fn attaches_orphan_specifier_with_hyphen_and_dot() {
    let input = lines_vec!["objective-c", "```", "int main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```objective-c", "int main() {}", "```"]);
}

#[test]
fn does_not_attach_specifier_with_trailing_period() {
    let input = lines_vec!["rust.", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&input);
    assert_eq!(out, input);
}

#[test]
fn does_not_attach_specifier_with_trailing_question_mark() {
    let input = lines_vec!["rust?", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&input);
    assert_eq!(out, input);
}

#[test]
fn attaches_orphan_specifier_preserves_indent() {
    let input = lines_vec!["  Rust", "", "  ```", "  fn main() {}", "  ```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["  ```rust", "  fn main() {}", "  ```"]);
}

#[test]
fn attaches_orphan_specifier_preserves_tab_indent() {
    let input = lines_vec!["\tRust", "", "\t```", "\tfn main() {}", "\t```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["\t```rust", "\tfn main() {}", "\t```"]);
}

#[test]
fn attaches_orphan_specifier_mixed_indent() {
    let input = lines_vec![" \tRust", "", " \t```", " \tfn main() {}", " \t```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec![" \t```rust", " \tfn main() {}", " \t```"]);
}

#[test]
fn attaches_orphan_specifier_uses_candidate_indent_when_fence_unindented() {
    let input = lines_vec!["  Rust", "", "```", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["  ```rust", "fn main() {}", "```"]);
}

#[rstest]
#[case(lines_vec!["  Rust", "", "	```", "	fn main() {}", "	```"], lines_vec!["	```rust", "	fn main() {}", "	```"])]
#[case(lines_vec!["    Rust", "", "  ```", "  fn main() {}", "  ```"], lines_vec!["    ```rust", "  fn main() {}", "  ```"])]
fn attaches_orphan_specifier_with_mismatched_indent(
    #[case] input: Vec<String>,
    #[case] expected: Vec<String>,
) {
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, expected);
}

#[test]
fn attaches_orphan_specifier_allows_spaces() {
    let input = lines_vec!["TOML, Ini", "```", "a=1", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```toml,ini", "a=1", "```"]);
}

#[rstest]
#[case("````null", "````")]
#[case("````NULL", "````")]
#[case("````Null", "````")]
#[case("````null  ", "````")]
#[case("````   ", "````")]
#[case("````NULL  ", "````")]
#[case("````Null  ", "````")]
#[case("~~~~null", "~~~~")]
#[case("~~~~NULL", "~~~~")]
#[case("~~~~Null", "~~~~")]
#[case("~~~~null  ", "~~~~")]
#[case("~~~~   ", "~~~~")]
#[case("~~~~NULL  ", "~~~~")]
#[case("~~~~Null  ", "~~~~")]
fn compresses_null_language_to_empty(#[case] open: &str, #[case] close: &str) {
    let input = lines_vec![open, "code", close];
    let out = compress_fences(&input);
    assert_eq!(out, lines_vec!["```", "code", "```"]);
}

#[rstest]
#[case("```null")]
#[case("```NULL")]
#[case("```Null")]
#[case("```null  ")]
#[case("```NULL  ")]
#[case("```Null  ")]
#[case("~~~~null")]
#[case("~~~~NULL")]
#[case("~~~~Null")]
#[case("~~~~null  ")]
#[case("~~~~NULL  ")]
#[case("~~~~Null  ")]
fn attaches_orphan_specifier_when_null_language(#[case] fence: &str) {
    let input = lines_vec!["Rust", fence, "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}

#[test]
fn attaches_orphan_specifier_null_language_without_compression() {
    let input = lines_vec!["Rust", "```null", "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&input);
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}

#[rstest]
#[case("```   ")]
#[case("~~~~   ")]
fn attaches_orphan_specifier_whitespace_language(#[case] fence: &str) {
    let input = lines_vec!["Rust", fence, "fn main() {}", "```"];
    let out = attach_orphan_specifiers(&compress_fences(&input));
    assert_eq!(out, lines_vec!["```rust", "fn main() {}", "```"]);
}