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

   1 use std::borrow::ToOwned;
   2 use std::collections::{HashMap, HashSet};
   3 use std::fmt::Write;
   4 use std::io::BufRead;
   5 use std::iter::Iterator;
   6
   7 #[derive(PartialEq, Eq, Debug)]
   8 struct Config {
   9     column_threshold: usize,
  10     static_columns: Vec<Option<String>>,
  11 }
  12 impl Config {
  13     fn apply_command(&mut self, line_num: usize, cmd: &str) -> Result<(), std::io::Error> {
  14         if let Some(threshold) = cmd.strip_prefix("col_threshold ") {
  15             self.column_threshold = threshold.parse().map_err(|e| {
  16                 std::io::Error::new(
  17                     std::io::ErrorKind::InvalidInput,
  18                     format!("line {line_num}: col_threshold must be numeric: {e}"),
  19                 )
  20             })?;
  21         } else if let Some(col) = cmd.strip_prefix("col ") {
  22             self.static_columns.push(Some(col.to_owned()));
  23         } else if cmd == "colsep" {
  24             self.static_columns.push(None);
  25         } else {
  26             return Err(std::io::Error::new(
  27                 std::io::ErrorKind::InvalidInput,
  28                 format!("line {line_num}: Unknown command: {cmd}"),
  29             ));
  30         }
  31         Ok(())
  32     }
  33 }
  34
  35 const DEFAULT_CONFIG: Config = Config {
  36     column_threshold: 2,
  37     static_columns: vec![],
  38 };
  39
  40 const HEADER: &str = r#"<!DOCTYPE html>
  41 <html>
  42 <head>
  43   <meta charset="utf-8">
  44   <meta name="viewport" content="width=device-width, initial-scale=1">
  45   <style>
  46     td { text-align: center; }
  47     /* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
  48     th, td { white-space: nowrap; }
  49     th { text-align: left; font-weight: normal; }
  50     th.spacer_row { height: .3em; }
  51     .spacer_col { border: none; width: .2em; }
  52     table { border-collapse: collapse }
  53     tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 }
  54     tr.key > th > div { width: 1em; }
  55     tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
  56     td { border: thin solid gray; }
  57     td.leftover { text-align: left; border: none; padding-left: .4em; }
  58     td.yes { border: thin solid gray; background-color: #ddd; }
  59     /* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
  60     .highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
  61   </style>
  62   <script>
  63     function highlight(id)       { const e = document.getElementById(id); if (e) { e.classList.add(   "highlight"); } }
  64     function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove("highlight"); } }
  65     function h2(a, b)  {       highlight(a);       highlight(b); }
  66     function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
  67   </script>
  68 </head>
  69 <body>
  70   <table>
  71     <tbody>
  72 "#;
  73 const FOOTER: &str = "    </tbody>
  74   </table>
  75 </body>
  76 </html>";
  77
  78 #[derive(PartialEq, Eq, Debug)]
  79 pub struct HTML(String);
  80 impl HTML {
  81     fn escape(value: &str) -> HTML {
  82         let mut escaped: String = String::new();
  83         for c in value.chars() {
  84             match c {
  85                 '>' => escaped.push_str("&gt;"),
  86                 '<' => escaped.push_str("&lt;"),
  87                 '\'' => escaped.push_str("&#39;"),
  88                 '"' => escaped.push_str("&quot;"),
  89                 '&' => escaped.push_str("&amp;"),
  90                 ok_c => escaped.push(ok_c),
  91             }
  92         }
  93         HTML(escaped)
  94     }
  95 }
  96 impl From<&str> for HTML {
  97     fn from(value: &str) -> HTML {
  98         HTML(String::from(value))
  99     }
 100 }
 101 impl FromIterator<HTML> for HTML {
 102     fn from_iter<T>(iter: T) -> HTML
 103     where
 104         T: IntoIterator<Item = HTML>,
 105     {
 106         HTML(iter.into_iter().map(|html| html.0).collect::<String>())
 107     }
 108 }
 109 impl std::fmt::Display for HTML {
 110     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
 111         write!(f, "{}", self.0)
 112     }
 113 }
 114
 115 #[derive(Debug, PartialEq, Eq)]
 116 enum InputLine<'a> {
 117     Blank,
 118     RowHeader(&'a str),
 119     Entry(&'a str, Option<&'a str>),
 120     Command(&'a str),
 121 }
 122 impl<'a> From<&'a str> for InputLine<'a> {
 123     fn from(value: &'a str) -> InputLine<'a> {
 124         let trimmed = value.trim_end();
 125         if trimmed.is_empty() {
 126             InputLine::Blank
 127         } else if let Some(cmd) = trimmed.strip_prefix('!') {
 128             InputLine::Command(cmd)
 129         } else if !trimmed.starts_with(' ') {
 130             InputLine::RowHeader(value.trim())
 131         } else {
 132             match value.split_once(':') {
 133                 None => InputLine::Entry(value.trim(), None),
 134                 Some((col, instance)) => InputLine::Entry(col.trim(), Some(instance.trim())),
 135             }
 136         }
 137     }
 138 }
 139
 140 #[derive(Debug, PartialEq, Eq)]
 141 struct Row {
 142     label: String,
 143     entries: HashMap<String, Vec<Option<String>>>,
 144 }
 145
 146 #[derive(Debug, PartialEq, Eq)]
 147 enum Rowlike {
 148     Row(Row),
 149     Spacer,
 150 }
 151
 152 struct Reader<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> {
 153     input: std::iter::Enumerate<Input>,
 154     row: Option<Row>,
 155     config: &'cfg mut Config,
 156 }
 157 impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Reader<'cfg, Input> {
 158     fn new(config: &'cfg mut Config, input: Input) -> Self {
 159         Self {
 160             input: input.enumerate(),
 161             row: None,
 162             config,
 163         }
 164     }
 165 }
 166 impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Iterator
 167     for Reader<'cfg, Input>
 168 {
 169     type Item = Result<Rowlike, std::io::Error>;
 170     fn next(&mut self) -> Option<Self::Item> {
 171         loop {
 172             match self.input.next() {
 173                 None => return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose(),
 174                 Some((_, Err(e))) => return Some(Err(e)),
 175                 Some((n, Ok(line))) => match InputLine::from(line.as_ref()) {
 176                     InputLine::Command(cmd) => {
 177                         if let Err(e) = self.config.apply_command(n + 1, cmd) {
 178                             return Some(Err(e));
 179                         }
 180                     }
 181                     InputLine::Blank if self.row.is_some() => {
 182                         return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose()
 183                     }
 184                     InputLine::Blank => return Some(Ok(Rowlike::Spacer)),
 185                     InputLine::Entry(col, instance) => match &mut self.row {
 186                         None => {
 187                             return Some(Err(std::io::Error::other(format!(
 188                                 "line {}: Entry with no header",
 189                                 n + 1
 190                             ))))
 191                         }
 192                         Some(ref mut row) => {
 193                             row.entries
 194                                 .entry(col.to_owned())
 195                                 .and_modify(|is| is.push(instance.map(ToOwned::to_owned)))
 196                                 .or_insert_with(|| vec![instance.map(ToOwned::to_owned)]);
 197                         }
 198                     },
 199                     InputLine::RowHeader(row) => {
 200                         let prev = std::mem::take(&mut self.row);
 201                         self.row = Some(Row {
 202                             label: row.to_owned(),
 203                             entries: HashMap::new(),
 204                         });
 205                         if prev.is_some() {
 206                             return Ok(prev.map(Rowlike::Row)).transpose();
 207                         }
 208                     }
 209                 },
 210             }
 211         }
 212     }
 213 }
 214
 215 fn read_input(input: impl std::io::Read) -> Result<(Vec<Rowlike>, Config), std::io::Error> {
 216     let mut config = DEFAULT_CONFIG;
 217     let reader = Reader::new(&mut config, std::io::BufReader::new(input).lines());
 218     reader
 219         .collect::<Result<Vec<_>, _>>()
 220         .map(|rows| (rows, config))
 221 }
 222
 223 fn column_counts(rows: &[Rowlike]) -> Vec<(usize, String)> {
 224     let empty = HashMap::new();
 225     let mut counts: Vec<_> = rows
 226         .iter()
 227         .flat_map(|rl| match rl {
 228             Rowlike::Row(r) => r.entries.keys(),
 229             Rowlike::Spacer => empty.keys(),
 230         })
 231         .fold(HashMap::new(), |mut cs, col| {
 232             cs.entry(col.to_owned())
 233                 .and_modify(|n| *n += 1)
 234                 .or_insert(1);
 235             cs
 236         })
 237         .into_iter()
 238         .map(|(col, n)| (n, col))
 239         .collect();
 240     counts.sort_unstable_by(|(an, acol), (bn, bcol)| bn.cmp(an).then(acol.cmp(bcol)));
 241     counts
 242 }
 243 fn column_order(config: &Config, rows: &[Rowlike]) -> Vec<String> {
 244     let static_columns: HashSet<&str> = config
 245         .static_columns
 246         .iter()
 247         .flatten()
 248         .map(std::string::String::as_str)
 249         .collect();
 250     column_counts(rows)
 251         .into_iter()
 252         .filter_map(|(n, col)| {
 253             (n >= config.column_threshold && !static_columns.contains(col.as_str())).then_some(col)
 254         })
 255         .collect()
 256 }
 257
 258 fn render_one_instance(instance: &Option<String>) -> HTML {
 259     match instance {
 260         None => HTML::from("✓"),
 261         Some(instance) => HTML::escape(instance.as_ref()),
 262     }
 263 }
 264
 265 fn render_instances(instances: &[Option<String>]) -> HTML {
 266     let all_empty = instances.iter().all(Option::is_none);
 267     if all_empty && instances.len() == 1 {
 268         HTML::from("")
 269     } else if all_empty {
 270         HTML(format!("{}", instances.len()))
 271     } else {
 272         HTML(
 273             instances
 274                 .iter()
 275                 .map(render_one_instance)
 276                 .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
 277                 .collect::<Vec<_>>()
 278                 .join(" "),
 279         )
 280     }
 281 }
 282
 283 fn render_cell(col: &str, row: &mut Row) -> HTML {
 284     let row_label = HTML::escape(row.label.as_ref());
 285     let col_label = HTML::escape(col);
 286     let instances: Option<&Vec<Option<String>>> = row.entries.get(col);
 287     let class = HTML::from(if instances.is_none() { "" } else { "yes" });
 288     let contents = match instances {
 289         None => HTML::from(""),
 290         Some(is) => render_instances(is),
 291     };
 292     row.entries.remove(col);
 293     HTML(format!(
 294         r#"<td class="{class}" onmouseover="h2('{row_label}','{col_label}')" onmouseout="ch2('{row_label}','{col_label}')">{contents}</td>"#
 295     ))
 296 }
 297
 298 fn render_leftover(notcol: &str, instances: &[Option<String>]) -> HTML {
 299     let label = HTML::escape(notcol);
 300     let rest = render_instances(instances);
 301     if rest == HTML::from("") {
 302         HTML(format!("{label}"))
 303     } else {
 304         HTML(format!("{label}: {rest}"))
 305     }
 306 }
 307
 308 fn render_all_leftovers(row: &Row) -> HTML {
 309     let mut order: Vec<_> = row.entries.keys().collect();
 310     order.sort_unstable();
 311     HTML(
 312         order
 313             .into_iter()
 314             .map(|notcol| render_leftover(notcol, row.entries.get(notcol).expect("Key vanished?!")))
 315             .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
 316             .collect::<Vec<_>>()
 317             .join(", "),
 318     )
 319 }
 320
 321 fn render_row(config: &Config, columns: &[String], rowlike: &mut Rowlike) -> HTML {
 322     match rowlike {
 323         Rowlike::Spacer => HTML::from("<tr><th class=\"spacer_row\"></th></tr>\n"),
 324         Rowlike::Row(row) => {
 325             let row_label = HTML::escape(row.label.as_ref());
 326             let static_cells = config
 327                 .static_columns
 328                 .iter()
 329                 .map(|ocol| match ocol {
 330                     Some(col) => render_cell(col, row),
 331                     None => HTML::from(r#"<td class="spacer_col"></td>"#),
 332                 })
 333                 .collect::<HTML>();
 334             let dynamic_cells = columns
 335                 .iter()
 336                 .map(|col| render_cell(col, row))
 337                 .collect::<HTML>();
 338             let leftovers = render_all_leftovers(row);
 339             HTML(format!(
 340                 "<tr><th id=\"{row_label}\">{row_label}</th>{static_cells}{dynamic_cells}<td class=\"leftover\" onmouseover=\"highlight('{row_label}')\" onmouseout=\"clear_highlight('{row_label}')\">{leftovers}</td></tr>\n"
 341             ))
 342         }
 343     }
 344 }
 345
 346 fn render_column_headers(config: &Config, columns: &[String]) -> HTML {
 347     let static_columns = config.static_columns.iter().map(|oc| oc.as_ref());
 348     let dynamic_columns = columns.iter().map(Some);
 349     HTML(
 350         String::from(r#"<tr class="key"><th></th>"#)
 351             + &static_columns
 352                 .chain(dynamic_columns)
 353                 .fold(String::new(), |mut acc, ocol| {
 354                     match ocol {
 355                         Some(col) => {
 356                             let col_header = HTML::escape(col);
 357                             write!(
 358                                 &mut acc,
 359                                 r#"<th id="{col_header}"><div><div>{col_header}</div></div></th>"#
 360                             )
 361                         }
 362                         None => write!(&mut acc, r#"<th class="col_spacer"></th>"#),
 363                     }
 364                     .unwrap();
 365                     acc
 366                 })
 367             + "</tr>\n",
 368     )
 369 }
 370
 371 /// # Errors
 372 ///
 373 /// Will return `Err` if
 374 ///   * there's an i/o error while reading `input`
 375 ///   * the log has invalid syntax:
 376 ///     * an indented line with no preceding non-indented line
 377 pub fn tablify(input: impl std::io::Read) -> Result<HTML, std::io::Error> {
 378     let (rows, config) = read_input(input)?;
 379     let columns = column_order(&config, &rows);
 380     Ok(HTML(format!(
 381         "{HEADER}{}{}{FOOTER}",
 382         render_column_headers(&config, &columns),
 383         rows.into_iter()
 384             .map(|mut r| render_row(&config, &columns, &mut r))
 385             .collect::<HTML>()
 386     )))
 387 }
 388
 389 #[cfg(test)]
 390 mod tests {
 391     use super::*;
 392
 393     #[test]
 394     fn test_parse_line() {
 395         assert_eq!(InputLine::from(""), InputLine::Blank);
 396         assert_eq!(InputLine::from(" "), InputLine::Blank);
 397         assert_eq!(InputLine::from("foo"), InputLine::RowHeader("foo"));
 398         assert_eq!(InputLine::from("foo "), InputLine::RowHeader("foo"));
 399         assert_eq!(InputLine::from(" foo"), InputLine::Entry("foo", None));
 400         assert_eq!(
 401             InputLine::from(" foo:bar"),
 402             InputLine::Entry("foo", Some("bar"))
 403         );
 404         assert_eq!(
 405             InputLine::from(" foo: bar"),
 406             InputLine::Entry("foo", Some("bar"))
 407         );
 408         assert_eq!(
 409             InputLine::from(" foo: bar "),
 410             InputLine::Entry("foo", Some("bar"))
 411         );
 412         assert_eq!(
 413             InputLine::from(" foo:  bar "),
 414             InputLine::Entry("foo", Some("bar"))
 415         );
 416         assert_eq!(
 417             InputLine::from(" foo :  bar "),
 418             InputLine::Entry("foo", Some("bar"))
 419         );
 420     }
 421
 422     fn read_rows(input: impl std::io::Read) -> Result<Vec<Rowlike>, std::io::Error> {
 423         read_input(input).map(|(rows, _)| rows)
 424     }
 425     fn read_config(input: impl std::io::Read) -> Result<Config, std::io::Error> {
 426         read_input(input).map(|(_, config)| config)
 427     }
 428     #[test]
 429     fn test_read_rows() {
 430         assert_eq!(
 431             read_rows(&b"foo"[..]).unwrap(),
 432             vec![Rowlike::Row(Row {
 433                 label: "foo".to_owned(),
 434                 entries: HashMap::new(),
 435             })]
 436         );
 437         assert_eq!(
 438             read_rows(&b"bar"[..]).unwrap(),
 439             vec![Rowlike::Row(Row {
 440                 label: "bar".to_owned(),
 441                 entries: HashMap::new(),
 442             })]
 443         );
 444         assert_eq!(
 445             read_rows(&b"foo\nbar\n"[..]).unwrap(),
 446             vec![
 447                 Rowlike::Row(Row {
 448                     label: "foo".to_owned(),
 449                     entries: HashMap::new(),
 450                 }),
 451                 Rowlike::Row(Row {
 452                     label: "bar".to_owned(),
 453                     entries: HashMap::new(),
 454                 })
 455             ]
 456         );
 457         assert_eq!(
 458             read_rows(&b"foo\n bar\n"[..]).unwrap(),
 459             vec![Rowlike::Row(Row {
 460                 label: "foo".to_owned(),
 461                 entries: HashMap::from([("bar".to_owned(), vec![None])]),
 462             })]
 463         );
 464         assert_eq!(
 465             read_rows(&b"foo\n bar\n baz\n"[..]).unwrap(),
 466             vec![Rowlike::Row(Row {
 467                 label: "foo".to_owned(),
 468                 entries: HashMap::from([
 469                     ("bar".to_owned(), vec![None]),
 470                     ("baz".to_owned(), vec![None])
 471                 ]),
 472             })]
 473         );
 474         assert_eq!(
 475             read_rows(&b"foo\n\nbar\n"[..]).unwrap(),
 476             vec![
 477                 Rowlike::Row(Row {
 478                     label: "foo".to_owned(),
 479                     entries: HashMap::new(),
 480                 }),
 481                 Rowlike::Row(Row {
 482                     label: "bar".to_owned(),
 483                     entries: HashMap::new(),
 484                 })
 485             ]
 486         );
 487         assert_eq!(
 488             read_rows(&b"foo\n\n\nbar\n"[..]).unwrap(),
 489             vec![
 490                 Rowlike::Row(Row {
 491                     label: "foo".to_owned(),
 492                     entries: HashMap::new(),
 493                 }),
 494                 Rowlike::Spacer,
 495                 Rowlike::Row(Row {
 496                     label: "bar".to_owned(),
 497                     entries: HashMap::new(),
 498                 })
 499             ]
 500         );
 501         assert_eq!(
 502             read_rows(&b"foo\n \nbar\n"[..]).unwrap(),
 503             vec![
 504                 Rowlike::Row(Row {
 505                     label: "foo".to_owned(),
 506                     entries: HashMap::new(),
 507                 }),
 508                 Rowlike::Row(Row {
 509                     label: "bar".to_owned(),
 510                     entries: HashMap::new(),
 511                 })
 512             ]
 513         );
 514         assert_eq!(
 515             read_rows(&b"foo  \n bar  \n"[..]).unwrap(),
 516             vec![Rowlike::Row(Row {
 517                 label: "foo".to_owned(),
 518                 entries: HashMap::from([("bar".to_owned(), vec![None])]),
 519             })]
 520         );
 521
 522         let bad = read_rows(&b" foo"[..]);
 523         assert!(bad.is_err());
 524         assert!(format!("{bad:?}").contains("line 1: Entry with no header"));
 525
 526         let bad2 = read_rows(&b"foo\n\n bar"[..]);
 527         assert!(bad2.is_err());
 528         assert!(format!("{bad2:?}").contains("line 3: Entry with no header"));
 529     }
 530
 531     #[test]
 532     fn test_read_config() {
 533         assert_eq!(
 534             read_config(&b"!col_threshold 10"[..])
 535                 .unwrap()
 536                 .column_threshold,
 537             10
 538         );
 539         assert_eq!(
 540             read_config(&b"!col foo"[..]).unwrap().static_columns,
 541             vec![Some("foo".to_owned())]
 542         );
 543
 544         let bad_command = read_config(&b"!no such command"[..]);
 545         assert!(bad_command.is_err());
 546         assert!(format!("{bad_command:?}").contains("line 1: Unknown command"));
 547
 548         let bad_num = read_config(&b"!col_threshold foo"[..]);
 549         assert!(bad_num.is_err());
 550         assert!(format!("{bad_num:?}").contains("line 1: col_threshold must be numeric"));
 551     }
 552
 553     #[test]
 554     fn test_column_counts() {
 555         assert_eq!(
 556             column_counts(&read_rows(&b"foo\n bar\n baz\n"[..]).unwrap()),
 557             vec![(1, String::from("bar")), (1, String::from("baz"))]
 558         );
 559         assert_eq!(
 560             column_counts(&read_rows(&b"foo\n bar\n baz\nquux\n baz"[..]).unwrap()),
 561             vec![(2, String::from("baz")), (1, String::from("bar"))]
 562         );
 563         assert_eq!(
 564             column_counts(&read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..]).unwrap()),
 565             vec![(2, String::from("baz")), (1, String::from("bar"))]
 566         );
 567         assert_eq!(
 568             column_counts(
 569                 &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..]).unwrap()
 570             ),
 571             vec![(2, String::from("baz")), (1, String::from("bar"))]
 572         );
 573     }
 574
 575     #[test]
 576     fn test_render_cell() {
 577         assert_eq!(
 578             render_cell(
 579                 "foo",
 580                 &mut Row {
 581                     label: "nope".to_owned(),
 582                     entries: HashMap::new(),
 583                 }
 584             ),
 585             HTML::from(
 586                 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 587             )
 588         );
 589         assert_eq!(
 590             render_cell(
 591                 "foo",
 592                 &mut Row {
 593                     label: "nope".to_owned(),
 594                     entries: HashMap::from([("bar".to_owned(), vec![None])]),
 595                 }
 596             ),
 597             HTML::from(
 598                 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 599             )
 600         );
 601         assert_eq!(
 602             render_cell(
 603                 "foo",
 604                 &mut Row {
 605                     label: "nope".to_owned(),
 606                     entries: HashMap::from([("foo".to_owned(), vec![None])]),
 607                 }
 608             ),
 609             HTML::from(
 610                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 611             )
 612         );
 613         assert_eq!(
 614             render_cell(
 615                 "foo",
 616                 &mut Row {
 617                     label: "nope".to_owned(),
 618                     entries: HashMap::from([("foo".to_owned(), vec![None, None])]),
 619                 }
 620             ),
 621             HTML::from(
 622                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">2</td>"#
 623             )
 624         );
 625         assert_eq!(
 626             render_cell(
 627                 "foo",
 628                 &mut Row {
 629                     label: "nope".to_owned(),
 630                     entries: HashMap::from([(
 631                         "foo".to_owned(),
 632                         vec![Some("5".to_owned()), Some("10".to_owned())]
 633                     )]),
 634                 }
 635             ),
 636             HTML::from(
 637                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 10</td>"#
 638             )
 639         );
 640         assert_eq!(
 641             render_cell(
 642                 "foo",
 643                 &mut Row {
 644                     label: "nope".to_owned(),
 645                     entries: HashMap::from([("foo".to_owned(), vec![Some("5".to_owned()), None])]),
 646                 }
 647             ),
 648             HTML::from(
 649                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 ✓</td>"#
 650             )
 651         );
 652         assert_eq!(
 653             render_cell(
 654                 "heart",
 655                 &mut Row {
 656                     label: "nope".to_owned(),
 657                     entries: HashMap::from([("heart".to_owned(), vec![Some("<3".to_owned())])]),
 658                 }
 659             ),
 660             HTML::from(
 661                 r#"<td class="yes" onmouseover="h2('nope','heart')" onmouseout="ch2('nope','heart')">&lt;3</td>"#
 662             )
 663         );
 664         assert_eq!(
 665             render_cell(
 666                 "foo",
 667                 &mut Row {
 668                     label: "bob's".to_owned(),
 669                     entries: HashMap::from([("foo".to_owned(), vec![None])]),
 670                 }
 671             ),
 672             HTML::from(
 673                 r#"<td class="yes" onmouseover="h2('bob&#39;s','foo')" onmouseout="ch2('bob&#39;s','foo')"></td>"#
 674             )
 675         );
 676         let mut r = Row {
 677             label: "nope".to_owned(),
 678             entries: HashMap::from([
 679                 ("foo".to_owned(), vec![None]),
 680                 ("baz".to_owned(), vec![None]),
 681             ]),
 682         };
 683         assert_eq!(r.entries.len(), 2);
 684         render_cell("foo", &mut r);
 685         assert_eq!(r.entries.len(), 1);
 686         render_cell("bar", &mut r);
 687         assert_eq!(r.entries.len(), 1);
 688         render_cell("baz", &mut r);
 689         assert_eq!(r.entries.len(), 0);
 690     }
 691
 692     #[test]
 693     fn test_render_leftovers() {
 694         assert_eq!(
 695             render_all_leftovers(&Row {
 696                 label: "nope".to_owned(),
 697                 entries: HashMap::from([("foo".to_owned(), vec![None])]),
 698             }),
 699             HTML::from("foo")
 700         );
 701         assert_eq!(
 702             render_all_leftovers(&Row {
 703                 label: "nope".to_owned(),
 704                 entries: HashMap::from([
 705                     ("foo".to_owned(), vec![None]),
 706                     ("bar".to_owned(), vec![None])
 707                 ]),
 708             }),
 709             HTML::from("bar, foo")
 710         );
 711         assert_eq!(
 712             render_all_leftovers(&Row {
 713                 label: "nope".to_owned(),
 714                 entries: HashMap::from([
 715                     ("foo".to_owned(), vec![None]),
 716                     ("bar".to_owned(), vec![None, None])
 717                 ]),
 718             }),
 719             HTML::from("bar: 2, foo")
 720         );
 721     }
 722
 723     #[test]
 724     fn test_render_row() {
 725         assert_eq!(
 726             render_row(
 727                 &DEFAULT_CONFIG,
 728                 &["foo".to_owned()],
 729                 &mut Rowlike::Row(Row {
 730                     label: "nope".to_owned(),
 731                     entries: HashMap::from([("bar".to_owned(), vec![None])]),
 732                 })
 733             ),
 734             HTML::from(
 735                 r#"<tr><th id="nope">nope</th><td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')">bar</td></tr>
 736 "#
 737             )
 738         );
 739         assert_eq!(
 740             render_row(
 741                 &Config {
 742                     column_threshold: 0,
 743                     static_columns: vec![Some("foo".to_owned()), Some("bar".to_owned())],
 744                 },
 745                 &["baz".to_owned()],
 746                 &mut Rowlike::Row(Row {
 747                     label: "nope".to_owned(),
 748                     entries: HashMap::from([
 749                         ("bar".to_owned(), vec![Some("r".to_owned())]),
 750                         ("baz".to_owned(), vec![Some("z".to_owned())]),
 751                         ("foo".to_owned(), vec![Some("f".to_owned())]),
 752                     ]),
 753                 })
 754             ),
 755             HTML::from(
 756                 r#"<tr><th id="nope">nope</th><td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">f</td><td class="yes" onmouseover="h2('nope','bar')" onmouseout="ch2('nope','bar')">r</td><td class="yes" onmouseover="h2('nope','baz')" onmouseout="ch2('nope','baz')">z</td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')"></td></tr>
 757 "#
 758             )
 759         );
 760         assert_eq!(
 761             render_row(
 762                 &Config {
 763                     column_threshold: 0,
 764                     static_columns: vec![Some("foo".to_owned()), None, Some("bar".to_owned())],
 765                 },
 766                 &[],
 767                 &mut Rowlike::Row(Row {
 768                     label: "nope".to_owned(),
 769                     entries: HashMap::from([
 770                         ("bar".to_owned(), vec![Some("r".to_owned())]),
 771                         ("foo".to_owned(), vec![Some("f".to_owned())]),
 772                     ]),
 773                 })
 774             ),
 775             HTML::from(
 776                 r#"<tr><th id="nope">nope</th><td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">f</td><td class="spacer_col"></td><td class="yes" onmouseover="h2('nope','bar')" onmouseout="ch2('nope','bar')">r</td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')"></td></tr>
 777 "#
 778             )
 779         );
 780     }
 781 }