git.scottworley.com Git - tablify/blame_incremental - src/lib.rs

use std::collections::{HashMap, HashSet};
use std::fmt::Write;
use std::io::BufRead;
use std::iter::Iterator;

const HEADER: &str = "<!DOCTYPE html>
<html>
<head>
  <meta charset=\"utf-8\">
  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
  <style>
    /* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
    th, td { white-space: nowrap; }
    th { text-align: left; font-weight: normal; }
    table { border-collapse: collapse }
    tr.key > th { height: 8em; vertical-align: bottom; line-height: 1 }
    tr.key > th > div { width: 1em; }
    tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
    td { border: thin solid gray; }
    td.numeric { text-align: right; }
    td.yes { border: thin solid gray; background-color: gray; }
    td.spacer { border: none; }
    /* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
    .highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
    img { height: 1.2em; }
  </style>
  <script>
    function highlight(id)       { const e = document.getElementById(id); if (e) { e.classList.add(   \"highlight\"); } }
    function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove(\"highlight\"); } }
    function h2(a, b)  {       highlight(a);       highlight(b); }
    function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
  </script>
</head>
<body>
  <table>
    <tbody>
";
const FOOTER: &str = "    </tbody>
  </table>
</body>
</html>";

#[derive(Debug, PartialEq, Eq, Hash)]
struct Entry {
    col: String,
    instance: Option<String>,
}
impl From<&str> for Entry {
    fn from(value: &str) -> Entry {
        match value.split_once(':') {
            None => Entry {
                col: String::from(value),
                instance: None,
            },
            Some((col, instance)) => Entry {
                col: String::from(col.trim()),
                instance: Some(String::from(instance.trim())),
            },
        }
    }
}

#[derive(Debug, PartialEq, Eq)]
struct RowInput {
    label: String,
    entries: Vec<Entry>,
}

struct Reader<Input: Iterator<Item = Result<String, std::io::Error>>> {
    input: std::iter::Enumerate<Input>,
    row: Option<RowInput>,
}
impl<Input: Iterator<Item = Result<String, std::io::Error>>> Reader<Input> {
    fn new(input: Input) -> Self {
        Self {
            input: input.enumerate(),
            row: None,
        }
    }
}
impl<Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader<Input> {
    type Item = Result<RowInput, std::io::Error>;
    fn next(&mut self) -> Option<Self::Item> {
        loop {
            match self
                .input
                .next()
                .map(|(n, r)| (n, r.map(|line| String::from(line.trim_end()))))
            {
                None => return Ok(std::mem::take(&mut self.row)).transpose(),
                Some((_, Err(e))) => return Some(Err(e)),
                Some((_, Ok(line))) if line.is_empty() && self.row.is_some() => {
                    return Ok(std::mem::take(&mut self.row)).transpose()
                }
                Some((_, Ok(line))) if line.is_empty() => {}
                Some((n, Ok(line))) if line.starts_with(' ') => match &mut self.row {
                    None => {
                        return Some(Err(std::io::Error::other(format!(
                            "{}: Entry with no header",
                            n + 1
                        ))))
                    }
                    Some(ref mut row) => row.entries.push(Entry::from(line.trim())),
                },
                Some((_, Ok(line))) => {
                    let prev = std::mem::take(&mut self.row);
                    self.row = Some(RowInput {
                        label: line,
                        entries: vec![],
                    });
                    if prev.is_some() {
                        return Ok(prev).transpose();
                    }
                }
            }
        }
    }
}

fn read_rows(input: impl std::io::Read) -> impl Iterator<Item = Result<RowInput, std::io::Error>> {
    Reader::new(std::io::BufReader::new(input).lines())
}

fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
    let mut counts: Vec<_> = rows
        .iter()
        .flat_map(|r| {
            r.entries
                .iter()
                .map(|e| &e.col)
                .collect::<HashSet<_>>()
                .into_iter()
        })
        .fold(HashMap::new(), |mut cs, col| {
            cs.entry(String::from(col))
                .and_modify(|n| *n += 1)
                .or_insert(1);
            cs
        })
        .into_iter()
        .map(|(col, n)| (n, col))
        .collect();
    counts.sort();
    counts
}
fn column_order(rows: &[RowInput]) -> Vec<String> {
    column_counts(rows)
        .into_iter()
        .map(|(_, col)| col)
        .collect()
}

fn render_instance(entry: &Entry) -> String {
    match &entry.instance {
        None => String::from("✓ "),
        Some(instance) => String::from(instance) + " ",
    }
}

fn render_cell(col: &str, row: &RowInput) -> String {
    // TODO: Escape HTML special characters
    let entries: Vec<&Entry> = row.entries.iter().filter(|e| e.col == col).collect();
    let class = if entries.is_empty() { "" } else { "yes" };
    let all_empty = entries.iter().all(|e| e.instance.is_none());
    let contents = if entries.is_empty() || (all_empty && entries.len() == 1) {
        String::new()
    } else if all_empty {
        format!("{}", entries.len())
    } else {
        entries
            .iter()
            .map(|i| render_instance(i))
            .collect::<String>()
    };
    format!("<td class=\"{class}\">{}</td>", contents.trim())
}

fn render_row(columns: &[String], row: &RowInput) -> String {
    // This is O(n^2) & doesn't need to be
    // TODO: Escape HTML special characters
    format!(
        "<tr><th>{}</th>{}</tr>\n",
        row.label,
        &columns
            .iter()
            .map(|col| render_cell(col, row))
            .collect::<String>()
    )
}

fn render_column_headers(columns: &[String]) -> String {
    // TODO: Escape HTML special characters
    String::from("<th></th>")
        + &columns.iter().fold(String::new(), |mut acc, c| {
            write!(&mut acc, "<th>{c}</th>").unwrap();
            acc
        })
        + "\n"
}

/// # Errors
///
/// Will return `Err` if
///   * there's an i/o error while reading `input`
///   * the log has invalid syntax:
///     * an indented line with no preceding non-indented line
pub fn tablify(input: impl std::io::Read) -> Result<String, std::io::Error> {
    let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
    let columns = column_order(&rows);
    Ok(String::from(HEADER)
        + &render_column_headers(&columns)
        + &rows
            .into_iter()
            .map(|r| render_row(&columns, &r))
            .collect::<String>()
        + FOOTER)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_parse_entry() {
        assert_eq!(
            Entry::from("foo"),
            Entry {
                col: String::from("foo"),
                instance: None
            }
        );
        assert_eq!(
            Entry::from("foo:bar"),
            Entry {
                col: String::from("foo"),
                instance: Some(String::from("bar"))
            }
        );
        assert_eq!(
            Entry::from("foo: bar"),
            Entry {
                col: String::from("foo"),
                instance: Some(String::from("bar"))
            }
        );
    }

    #[test]
    fn test_read_rows() {
        assert_eq!(
            read_rows(&b"foo"[..]).flatten().collect::<Vec<_>>(),
            vec![RowInput {
                label: String::from("foo"),
                entries: vec![]
            }]
        );
        assert_eq!(
            read_rows(&b"bar"[..]).flatten().collect::<Vec<_>>(),
            vec![RowInput {
                label: String::from("bar"),
                entries: vec![]
            }]
        );
        assert_eq!(
            read_rows(&b"foo\nbar\n"[..]).flatten().collect::<Vec<_>>(),
            vec![
                RowInput {
                    label: String::from("foo"),
                    entries: vec![]
                },
                RowInput {
                    label: String::from("bar"),
                    entries: vec![]
                }
            ]
        );
        assert_eq!(
            read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
            vec![RowInput {
                label: String::from("foo"),
                entries: vec![Entry::from("bar")]
            }]
        );
        assert_eq!(
            read_rows(&b"foo\n bar\n baz\n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![RowInput {
                label: String::from("foo"),
                entries: vec![Entry::from("bar"), Entry::from("baz")]
            }]
        );
        assert_eq!(
            read_rows(&b"foo\n\nbar\n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![
                RowInput {
                    label: String::from("foo"),
                    entries: vec![]
                },
                RowInput {
                    label: String::from("bar"),
                    entries: vec![]
                }
            ]
        );
        assert_eq!(
            read_rows(&b"foo\n \nbar\n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![
                RowInput {
                    label: String::from("foo"),
                    entries: vec![]
                },
                RowInput {
                    label: String::from("bar"),
                    entries: vec![]
                }
            ]
        );
        assert_eq!(
            read_rows(&b"foo  \n bar  \n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![RowInput {
                label: String::from("foo"),
                entries: vec![Entry::from("bar")]
            }]
        );

        let bad = read_rows(&b" foo"[..]).next().unwrap();
        assert!(bad.is_err());
        assert!(format!("{bad:?}").contains("1: Entry with no header"));

        let bad2 = read_rows(&b"foo\n\n bar"[..]).nth(1).unwrap();
        assert!(bad2.is_err());
        assert!(format!("{bad2:?}").contains("3: Entry with no header"));
    }

    #[test]
    fn test_column_counts() {
        assert_eq!(
            column_counts(
                &read_rows(&b"foo\n bar\n baz\n"[..])
                    .collect::<Result<Vec<_>, _>>()
                    .unwrap()
            ),
            vec![(1, String::from("bar")), (1, String::from("baz"))]
        );
        assert_eq!(
            column_counts(
                &read_rows(&b"foo\n bar\n baz\nquux\n baz"[..])
                    .collect::<Result<Vec<_>, _>>()
                    .unwrap()
            ),
            vec![(1, String::from("bar")), (2, String::from("baz"))]
        );
        assert_eq!(
            column_counts(
                &read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..])
                    .collect::<Result<Vec<_>, _>>()
                    .unwrap()
            ),
            vec![(1, String::from("bar")), (2, String::from("baz"))]
        );
        assert_eq!(
            column_counts(
                &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..])
                    .collect::<Result<Vec<_>, _>>()
                    .unwrap()
            ),
            vec![(1, String::from("bar")), (2, String::from("baz"))]
        );
    }

    #[test]
    fn test_render_cell() {
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: String::from("nope"),
                    entries: vec![]
                }
            ),
            String::from("<td class=\"\"></td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: String::from("nope"),
                    entries: vec![Entry::from("bar")]
                }
            ),
            String::from("<td class=\"\"></td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: String::from("nope"),
                    entries: vec![Entry::from("foo")]
                }
            ),
            String::from("<td class=\"yes\"></td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: String::from("nope"),
                    entries: vec![Entry::from("foo"), Entry::from("foo")]
                }
            ),
            String::from("<td class=\"yes\">2</td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: String::from("nope"),
                    entries: vec![Entry::from("foo: 5"), Entry::from("foo: 10")]
                }
            ),
            String::from("<td class=\"yes\">5 10</td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: String::from("nope"),
                    entries: vec![Entry::from("foo: 5"), Entry::from("foo")]
                }
            ),
            String::from("<td class=\"yes\">5 ✓</td>")
        );
    }
}
Commit	Line	Data
	1	use std::collections::{HashMap, HashSet};
	2	use std::fmt::Write;
	3	use std::io::BufRead;
	4	use std::iter::Iterator;
	5
	6	const HEADER: &str = "<!DOCTYPE html>
	7	<html>
	8	<head>
	9	<meta charset=\"utf-8\">
	10	<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
	11	<style>
	12	/* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
	13	th, td { white-space: nowrap; }
	14	th { text-align: left; font-weight: normal; }
	15	table { border-collapse: collapse }
	16	tr.key > th { height: 8em; vertical-align: bottom; line-height: 1 }
	17	tr.key > th > div { width: 1em; }
	18	tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
	19	td { border: thin solid gray; }
	20	td.numeric { text-align: right; }
	21	td.yes { border: thin solid gray; background-color: gray; }
	22	td.spacer { border: none; }
	23	/* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
	24	.highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
	25	img { height: 1.2em; }
	26	</style>
	27	<script>
	28	function highlight(id) { const e = document.getElementById(id); if (e) { e.classList.add( \"highlight\"); } }
	29	function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove(\"highlight\"); } }
	30	function h2(a, b) { highlight(a); highlight(b); }
	31	function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
	32	</script>
	33	</head>
	34	<body>
	35	<table>
	36	<tbody>
	37	";
	38	const FOOTER: &str = " </tbody>
	39	</table>
	40	</body>
	41	</html>";
	42
	43	#[derive(Debug, PartialEq, Eq, Hash)]
	44	struct Entry {
	45	col: String,
	46	instance: Option<String>,
	47	}
	48	impl From<&str> for Entry {
	49	fn from(value: &str) -> Entry {
	50	match value.split_once(':') {
	51	None => Entry {
	52	col: String::from(value),
	53	instance: None,
	54	},
	55	Some((col, instance)) => Entry {
	56	col: String::from(col.trim()),
	57	instance: Some(String::from(instance.trim())),
	58	},
	59	}
	60	}
	61	}
	62
	63	#[derive(Debug, PartialEq, Eq)]
	64	struct RowInput {
	65	label: String,
	66	entries: Vec<Entry>,
	67	}
	68
	69	struct Reader<Input: Iterator<Item = Result<String, std::io::Error>>> {
	70	input: std::iter::Enumerate<Input>,
	71	row: Option<RowInput>,
	72	}
	73	impl<Input: Iterator<Item = Result<String, std::io::Error>>> Reader<Input> {
	74	fn new(input: Input) -> Self {
	75	Self {
	76	input: input.enumerate(),
	77	row: None,
	78	}
	79	}
	80	}
	81	impl<Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader<Input> {
	82	type Item = Result<RowInput, std::io::Error>;
	83	fn next(&mut self) -> Option<Self::Item> {
	84	loop {
	85	match self
	86	.input
	87	.next()
	88	.map(\|(n, r)\| (n, r.map(\|line\| String::from(line.trim_end()))))
	89	{
	90	None => return Ok(std::mem::take(&mut self.row)).transpose(),
	91	Some((_, Err(e))) => return Some(Err(e)),
	92	Some((_, Ok(line))) if line.is_empty() && self.row.is_some() => {
	93	return Ok(std::mem::take(&mut self.row)).transpose()
	94	}
	95	Some((_, Ok(line))) if line.is_empty() => {}
	96	Some((n, Ok(line))) if line.starts_with(' ') => match &mut self.row {
	97	None => {
	98	return Some(Err(std::io::Error::other(format!(
	99	"{}: Entry with no header",
	100	n + 1
	101	))))
	102	}
	103	Some(ref mut row) => row.entries.push(Entry::from(line.trim())),
	104	},
	105	Some((_, Ok(line))) => {
	106	let prev = std::mem::take(&mut self.row);
	107	self.row = Some(RowInput {
	108	label: line,
	109	entries: vec![],
	110	});
	111	if prev.is_some() {
	112	return Ok(prev).transpose();
	113	}
	114	}
	115	}
	116	}
	117	}
	118	}
	119
	120	fn read_rows(input: impl std::io::Read) -> impl Iterator<Item = Result<RowInput, std::io::Error>> {
	121	Reader::new(std::io::BufReader::new(input).lines())
	122	}
	123
	124	fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
	125	let mut counts: Vec<_> = rows
	126	.iter()
	127	.flat_map(\|r\| {
	128	r.entries
	129	.iter()
	130	.map(\|e\| &e.col)
	131	.collect::<HashSet<_>>()
	132	.into_iter()
	133	})
	134	.fold(HashMap::new(), \|mut cs, col\| {
	135	cs.entry(String::from(col))
	136	.and_modify(\|n\| *n += 1)
	137	.or_insert(1);
	138	cs
	139	})
	140	.into_iter()
	141	.map(\|(col, n)\| (n, col))
	142	.collect();
	143	counts.sort();
	144	counts
	145	}
	146	fn column_order(rows: &[RowInput]) -> Vec<String> {
	147	column_counts(rows)
	148	.into_iter()
	149	.map(\|(_, col)\| col)
	150	.collect()
	151	}
	152
	153	fn render_instance(entry: &Entry) -> String {
	154	match &entry.instance {
	155	None => String::from("✓ "),
	156	Some(instance) => String::from(instance) + " ",
	157	}
	158	}
	159
	160	fn render_cell(col: &str, row: &RowInput) -> String {
	161	// TODO: Escape HTML special characters
	162	let entries: Vec<&Entry> = row.entries.iter().filter(\|e\| e.col == col).collect();
	163	let class = if entries.is_empty() { "" } else { "yes" };
	164	let all_empty = entries.iter().all(\|e\| e.instance.is_none());
	165	let contents = if entries.is_empty() \|\| (all_empty && entries.len() == 1) {
	166	String::new()
	167	} else if all_empty {
	168	format!("{}", entries.len())
	169	} else {
	170	entries
	171	.iter()
	172	.map(\|i\| render_instance(i))
	173	.collect::<String>()
	174	};
	175	format!("<td class=\"{class}\">{}</td>", contents.trim())
	176	}
	177
	178	fn render_row(columns: &[String], row: &RowInput) -> String {
	179	// This is O(n^2) & doesn't need to be
	180	// TODO: Escape HTML special characters
	181	format!(
	182	"<tr><th>{}</th>{}</tr>\n",
	183	row.label,
	184	&columns
	185	.iter()
	186	.map(\|col\| render_cell(col, row))
	187	.collect::<String>()
	188	)
	189	}
	190
	191	fn render_column_headers(columns: &[String]) -> String {
	192	// TODO: Escape HTML special characters
	193	String::from("<th></th>")
	194	+ &columns.iter().fold(String::new(), \|mut acc, c\| {
	195	write!(&mut acc, "<th>{c}</th>").unwrap();
	196	acc
	197	})
	198	+ "\n"
	199	}
	200
	201	/// # Errors
	202	///
	203	/// Will return `Err` if
	204	/// * there's an i/o error while reading `input`
	205	/// * the log has invalid syntax:
	206	/// * an indented line with no preceding non-indented line
	207	pub fn tablify(input: impl std::io::Read) -> Result<String, std::io::Error> {
	208	let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
	209	let columns = column_order(&rows);
	210	Ok(String::from(HEADER)
	211	+ &render_column_headers(&columns)
	212	+ &rows
	213	.into_iter()
	214	.map(\|r\| render_row(&columns, &r))
	215	.collect::<String>()
	216	+ FOOTER)
	217	}
	218
	219	#[cfg(test)]
	220	mod tests {
	221	use super::*;
	222
	223	#[test]
	224	fn test_parse_entry() {
	225	assert_eq!(
	226	Entry::from("foo"),
	227	Entry {
	228	col: String::from("foo"),
	229	instance: None
	230	}
	231	);
	232	assert_eq!(
	233	Entry::from("foo:bar"),
	234	Entry {
	235	col: String::from("foo"),
	236	instance: Some(String::from("bar"))
	237	}
	238	);
	239	assert_eq!(
	240	Entry::from("foo: bar"),
	241	Entry {
	242	col: String::from("foo"),
	243	instance: Some(String::from("bar"))
	244	}
	245	);
	246	}
	247
	248	#[test]
	249	fn test_read_rows() {
	250	assert_eq!(
	251	read_rows(&b"foo"[..]).flatten().collect::<Vec<_>>(),
	252	vec![RowInput {
	253	label: String::from("foo"),
	254	entries: vec![]
	255	}]
	256	);
	257	assert_eq!(
	258	read_rows(&b"bar"[..]).flatten().collect::<Vec<_>>(),
	259	vec![RowInput {
	260	label: String::from("bar"),
	261	entries: vec![]
	262	}]
	263	);
	264	assert_eq!(
	265	read_rows(&b"foo\nbar\n"[..]).flatten().collect::<Vec<_>>(),
	266	vec![
	267	RowInput {
	268	label: String::from("foo"),
	269	entries: vec![]
	270	},
	271	RowInput {
	272	label: String::from("bar"),
	273	entries: vec![]
	274	}
	275	]
	276	);
	277	assert_eq!(
	278	read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
	279	vec![RowInput {
	280	label: String::from("foo"),
	281	entries: vec![Entry::from("bar")]
	282	}]
	283	);
	284	assert_eq!(
	285	read_rows(&b"foo\n bar\n baz\n"[..])
	286	.flatten()
	287	.collect::<Vec<_>>(),
	288	vec![RowInput {
	289	label: String::from("foo"),
	290	entries: vec![Entry::from("bar"), Entry::from("baz")]
	291	}]
	292	);
	293	assert_eq!(
	294	read_rows(&b"foo\n\nbar\n"[..])
	295	.flatten()
	296	.collect::<Vec<_>>(),
	297	vec![
	298	RowInput {
	299	label: String::from("foo"),
	300	entries: vec![]
	301	},
	302	RowInput {
	303	label: String::from("bar"),
	304	entries: vec![]
	305	}
	306	]
	307	);
	308	assert_eq!(
	309	read_rows(&b"foo\n \nbar\n"[..])
	310	.flatten()
	311	.collect::<Vec<_>>(),
	312	vec![
	313	RowInput {
	314	label: String::from("foo"),
	315	entries: vec![]
	316	},
	317	RowInput {
	318	label: String::from("bar"),
	319	entries: vec![]
	320	}
	321	]
	322	);
	323	assert_eq!(
	324	read_rows(&b"foo \n bar \n"[..])
	325	.flatten()
	326	.collect::<Vec<_>>(),
	327	vec![RowInput {
	328	label: String::from("foo"),
	329	entries: vec![Entry::from("bar")]
	330	}]
	331	);
	332
	333	let bad = read_rows(&b" foo"[..]).next().unwrap();
	334	assert!(bad.is_err());
	335	assert!(format!("{bad:?}").contains("1: Entry with no header"));
	336
	337	let bad2 = read_rows(&b"foo\n\n bar"[..]).nth(1).unwrap();
	338	assert!(bad2.is_err());
	339	assert!(format!("{bad2:?}").contains("3: Entry with no header"));
	340	}
	341
	342	#[test]
	343	fn test_column_counts() {
	344	assert_eq!(
	345	column_counts(
	346	&read_rows(&b"foo\n bar\n baz\n"[..])
	347	.collect::<Result<Vec<_>, _>>()
	348	.unwrap()
	349	),
	350	vec![(1, String::from("bar")), (1, String::from("baz"))]
	351	);
	352	assert_eq!(
	353	column_counts(
	354	&read_rows(&b"foo\n bar\n baz\nquux\n baz"[..])
	355	.collect::<Result<Vec<_>, _>>()
	356	.unwrap()
	357	),
	358	vec![(1, String::from("bar")), (2, String::from("baz"))]
	359	);
	360	assert_eq!(
	361	column_counts(
	362	&read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..])
	363	.collect::<Result<Vec<_>, _>>()
	364	.unwrap()
	365	),
	366	vec![(1, String::from("bar")), (2, String::from("baz"))]
	367	);
	368	assert_eq!(
	369	column_counts(
	370	&read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..])
	371	.collect::<Result<Vec<_>, _>>()
	372	.unwrap()
	373	),
	374	vec![(1, String::from("bar")), (2, String::from("baz"))]
	375	);
	376	}
	377
	378	#[test]
	379	fn test_render_cell() {
	380	assert_eq!(
	381	render_cell(
	382	"foo",
	383	&RowInput {
	384	label: String::from("nope"),
	385	entries: vec![]
	386	}
	387	),
	388	String::from("<td class=\"\"></td>")
	389	);
	390	assert_eq!(
	391	render_cell(
	392	"foo",
	393	&RowInput {
	394	label: String::from("nope"),
	395	entries: vec![Entry::from("bar")]
	396	}
	397	),
	398	String::from("<td class=\"\"></td>")
	399	);
	400	assert_eq!(
	401	render_cell(
	402	"foo",
	403	&RowInput {
	404	label: String::from("nope"),
	405	entries: vec![Entry::from("foo")]
	406	}
	407	),
	408	String::from("<td class=\"yes\"></td>")
	409	);
	410	assert_eq!(
	411	render_cell(
	412	"foo",
	413	&RowInput {
	414	label: String::from("nope"),
	415	entries: vec![Entry::from("foo"), Entry::from("foo")]
	416	}
	417	),
	418	String::from("<td class=\"yes\">2</td>")
	419	);
	420	assert_eq!(
	421	render_cell(
	422	"foo",
	423	&RowInput {
	424	label: String::from("nope"),
	425	entries: vec![Entry::from("foo: 5"), Entry::from("foo: 10")]
	426	}
	427	),
	428	String::from("<td class=\"yes\">5 10</td>")
	429	);
	430	assert_eq!(
	431	render_cell(
	432	"foo",
	433	&RowInput {
	434	label: String::from("nope"),
	435	entries: vec![Entry::from("foo: 5"), Entry::from("foo")]
	436	}
	437	),
	438	String::from("<td class=\"yes\">5 ✓</td>")
	439	);
	440	}
	441	}