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 impl Default for Config {
  35     fn default() -> Self {
  36         Self {
  37             column_threshold: 2,
  38             static_columns: vec![],
  39         }
  40     }
  41 }
  42
  43 const HEADER: &str = r#"<!DOCTYPE html>
  44 <html>
  45 <head>
  46   <meta charset="utf-8">
  47   <meta name="viewport" content="width=device-width, initial-scale=1">
  48   <style>
  49     td { text-align: center; }
  50     /* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
  51     th, td { white-space: nowrap; }
  52     th { text-align: left; font-weight: normal; }
  53     th.spacer_row { height: .3em; }
  54     .spacer_col { border: none; width: .2em; }
  55     table { border-collapse: collapse }
  56     tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 }
  57     tr.key > th > div { width: 1em; }
  58     tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
  59     td { border: thin solid gray; }
  60     td.leftover { text-align: left; border: none; padding-left: .4em; }
  61     td.yes { border: thin solid gray; background-color: #ddd; }
  62     /* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
  63     .highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
  64   </style>
  65   <script>
  66     function highlight(id)       { const e = document.getElementById(id); if (e) { e.classList.add(   "highlight"); } }
  67     function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove("highlight"); } }
  68     function h2(a, b)  {       highlight(a);       highlight(b); }
  69     function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
  70   </script>
  71 </head>
  72 <body>
  73   <table>
  74     <tbody>
  75 "#;
  76 const FOOTER: &str = "    </tbody>
  77   </table>
  78 </body>
  79 </html>";
  80
  81 #[derive(PartialEq, Eq, Debug)]
  82 pub struct HTML(String);
  83 impl HTML {
  84     fn escape(value: &str) -> HTML {
  85         let mut escaped: String = String::new();
  86         for c in value.chars() {
  87             match c {
  88                 '>' => escaped.push_str("&gt;"),
  89                 '<' => escaped.push_str("&lt;"),
  90                 '\'' => escaped.push_str("&#39;"),
  91                 '"' => escaped.push_str("&quot;"),
  92                 '&' => escaped.push_str("&amp;"),
  93                 ok_c => escaped.push(ok_c),
  94             }
  95         }
  96         HTML(escaped)
  97     }
  98 }
  99 impl From<&str> for HTML {
 100     fn from(value: &str) -> HTML {
 101         HTML(String::from(value))
 102     }
 103 }
 104 impl FromIterator<HTML> for HTML {
 105     fn from_iter<T>(iter: T) -> HTML
 106     where
 107         T: IntoIterator<Item = HTML>,
 108     {
 109         HTML(iter.into_iter().map(|html| html.0).collect::<String>())
 110     }
 111 }
 112 impl std::fmt::Display for HTML {
 113     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
 114         write!(f, "{}", self.0)
 115     }
 116 }
 117
 118 #[derive(Debug, PartialEq, Eq)]
 119 enum InputLine<'a> {
 120     Blank,
 121     RowHeader(&'a str),
 122     Entry(&'a str, Option<&'a str>),
 123     Command(&'a str),
 124 }
 125 impl<'a> From<&'a str> for InputLine<'a> {
 126     fn from(value: &'a str) -> InputLine<'a> {
 127         let trimmed = value.trim_end();
 128         if trimmed.is_empty() {
 129             InputLine::Blank
 130         } else if let Some(cmd) = trimmed.strip_prefix('!') {
 131             InputLine::Command(cmd)
 132         } else if !trimmed.starts_with(' ') {
 133             InputLine::RowHeader(value.trim())
 134         } else {
 135             match value.split_once(':') {
 136                 None => InputLine::Entry(value.trim(), None),
 137                 Some((col, instance)) => InputLine::Entry(col.trim(), Some(instance.trim())),
 138             }
 139         }
 140     }
 141 }
 142
 143 #[derive(Debug, PartialEq, Eq)]
 144 struct Row {
 145     label: String,
 146     entries: HashMap<String, Vec<Option<String>>>,
 147 }
 148
 149 #[derive(Debug, PartialEq, Eq)]
 150 enum Rowlike {
 151     Row(Row),
 152     Spacer,
 153 }
 154
 155 struct Reader<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> {
 156     input: std::iter::Enumerate<Input>,
 157     row: Option<Row>,
 158     config: &'cfg mut Config,
 159 }
 160 impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Reader<'cfg, Input> {
 161     fn new(config: &'cfg mut Config, input: Input) -> Self {
 162         Self {
 163             input: input.enumerate(),
 164             row: None,
 165             config,
 166         }
 167     }
 168 }
 169 impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Iterator
 170     for Reader<'cfg, Input>
 171 {
 172     type Item = Result<Rowlike, std::io::Error>;
 173     fn next(&mut self) -> Option<Self::Item> {
 174         loop {
 175             match self.input.next() {
 176                 None => return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose(),
 177                 Some((_, Err(e))) => return Some(Err(e)),
 178                 Some((n, Ok(line))) => match InputLine::from(line.as_ref()) {
 179                     InputLine::Command(cmd) => {
 180                         if let Err(e) = self.config.apply_command(n + 1, cmd) {
 181                             return Some(Err(e));
 182                         }
 183                     }
 184                     InputLine::Blank if self.row.is_some() => {
 185                         return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose()
 186                     }
 187                     InputLine::Blank => return Some(Ok(Rowlike::Spacer)),
 188                     InputLine::Entry(col, instance) => match &mut self.row {
 189                         None => {
 190                             return Some(Err(std::io::Error::other(format!(
 191                                 "line {}: Entry with no header",
 192                                 n + 1
 193                             ))))
 194                         }
 195                         Some(ref mut row) => {
 196                             row.entries
 197                                 .entry(col.to_owned())
 198                                 .and_modify(|is| is.push(instance.map(ToOwned::to_owned)))
 199                                 .or_insert_with(|| vec![instance.map(ToOwned::to_owned)]);
 200                         }
 201                     },
 202                     InputLine::RowHeader(row) => {
 203                         let prev = std::mem::take(&mut self.row);
 204                         self.row = Some(Row {
 205                             label: row.to_owned(),
 206                             entries: HashMap::new(),
 207                         });
 208                         if prev.is_some() {
 209                             return Ok(prev.map(Rowlike::Row)).transpose();
 210                         }
 211                     }
 212                 },
 213             }
 214         }
 215     }
 216 }
 217
 218 fn read_input(input: impl std::io::Read) -> Result<(Vec<Rowlike>, Config), std::io::Error> {
 219     let mut config = Config::default();
 220     let reader = Reader::new(&mut config, std::io::BufReader::new(input).lines());
 221     reader
 222         .collect::<Result<Vec<_>, _>>()
 223         .map(|rows| (rows, config))
 224 }
 225
 226 fn column_counts(rows: &[Rowlike]) -> Vec<(usize, String)> {
 227     let empty = HashMap::new();
 228     let mut counts: Vec<_> = rows
 229         .iter()
 230         .flat_map(|rl| match rl {
 231             Rowlike::Row(r) => r.entries.keys(),
 232             Rowlike::Spacer => empty.keys(),
 233         })
 234         .fold(HashMap::new(), |mut cs, col| {
 235             cs.entry(col.to_owned())
 236                 .and_modify(|n| *n += 1)
 237                 .or_insert(1);
 238             cs
 239         })
 240         .into_iter()
 241         .map(|(col, n)| (n, col))
 242         .collect();
 243     counts.sort_unstable_by(|(an, acol), (bn, bcol)| bn.cmp(an).then(acol.cmp(bcol)));
 244     counts
 245 }
 246 fn column_order(config: &Config, rows: &[Rowlike]) -> Vec<String> {
 247     let static_columns: HashSet<&str> = config
 248         .static_columns
 249         .iter()
 250         .flatten()
 251         .map(std::string::String::as_str)
 252         .collect();
 253     column_counts(rows)
 254         .into_iter()
 255         .filter_map(|(n, col)| {
 256             (n >= config.column_threshold && !static_columns.contains(col.as_str())).then_some(col)
 257         })
 258         .collect()
 259 }
 260
 261 fn render_one_instance(instance: &Option<String>) -> HTML {
 262     match instance {
 263         None => HTML::from("✓"),
 264         Some(instance) => HTML::escape(instance.as_ref()),
 265     }
 266 }
 267
 268 fn render_instances(instances: &[Option<String>]) -> HTML {
 269     let all_empty = instances.iter().all(Option::is_none);
 270     if all_empty && instances.len() == 1 {
 271         HTML::from("")
 272     } else if all_empty {
 273         HTML(format!("{}", instances.len()))
 274     } else {
 275         HTML(
 276             instances
 277                 .iter()
 278                 .map(render_one_instance)
 279                 .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
 280                 .collect::<Vec<_>>()
 281                 .join(" "),
 282         )
 283     }
 284 }
 285
 286 fn render_cell(col: &str, row: &mut Row) -> HTML {
 287     let row_label = HTML::escape(row.label.as_ref());
 288     let col_label = HTML::escape(col);
 289     let instances: Option<&Vec<Option<String>>> = row.entries.get(col);
 290     let class = HTML::from(if instances.is_none() { "" } else { "yes" });
 291     let contents = match instances {
 292         None => HTML::from(""),
 293         Some(is) => render_instances(is),
 294     };
 295     row.entries.remove(col);
 296     HTML(format!(
 297         r#"<td class="{class}" onmouseover="h2('{row_label}','{col_label}')" onmouseout="ch2('{row_label}','{col_label}')">{contents}</td>"#
 298     ))
 299 }
 300
 301 fn render_leftover(notcol: &str, instances: &[Option<String>]) -> HTML {
 302     let label = HTML::escape(notcol);
 303     let rest = render_instances(instances);
 304     if rest == HTML::from("") {
 305         HTML(format!("{label}"))
 306     } else {
 307         HTML(format!("{label}: {rest}"))
 308     }
 309 }
 310
 311 fn render_all_leftovers(row: &Row) -> HTML {
 312     let mut order: Vec<_> = row.entries.keys().collect();
 313     order.sort_unstable();
 314     HTML(
 315         order
 316             .into_iter()
 317             .map(|notcol| render_leftover(notcol, row.entries.get(notcol).expect("Key vanished?!")))
 318             .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
 319             .collect::<Vec<_>>()
 320             .join(", "),
 321     )
 322 }
 323
 324 fn render_row(config: &Config, columns: &[String], rowlike: &mut Rowlike) -> HTML {
 325     match rowlike {
 326         Rowlike::Spacer => HTML::from("<tr><th class=\"spacer_row\"></th></tr>\n"),
 327         Rowlike::Row(row) => {
 328             let row_label = HTML::escape(row.label.as_ref());
 329             let static_cells = config
 330                 .static_columns
 331                 .iter()
 332                 .map(|ocol| match ocol {
 333                     Some(col) => render_cell(col, row),
 334                     None => HTML::from(r#"<td class="spacer_col"></td>"#),
 335                 })
 336                 .collect::<HTML>();
 337             let dynamic_cells = columns
 338                 .iter()
 339                 .map(|col| render_cell(col, row))
 340                 .collect::<HTML>();
 341             let leftovers = render_all_leftovers(row);
 342             HTML(format!(
 343                 "<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"
 344             ))
 345         }
 346     }
 347 }
 348
 349 fn render_column_headers(config: &Config, columns: &[String]) -> HTML {
 350     let static_columns = config.static_columns.iter().map(|oc| oc.as_ref());
 351     let dynamic_columns = columns.iter().map(Some);
 352     HTML(
 353         String::from(r#"<tr class="key"><th></th>"#)
 354             + &static_columns
 355                 .chain(dynamic_columns)
 356                 .fold(String::new(), |mut acc, ocol| {
 357                     match ocol {
 358                         Some(col) => {
 359                             let col_header = HTML::escape(col);
 360                             write!(
 361                                 &mut acc,
 362                                 r#"<th id="{col_header}"><div><div>{col_header}</div></div></th>"#
 363                             )
 364                         }
 365                         None => write!(&mut acc, r#"<th class="col_spacer"></th>"#),
 366                     }
 367                     .unwrap();
 368                     acc
 369                 })
 370             + "</tr>\n",
 371     )
 372 }
 373
 374 /// # Errors
 375 ///
 376 /// Will return `Err` if
 377 ///   * there's an i/o error while reading `input`
 378 ///   * the log has invalid syntax:
 379 ///     * an indented line with no preceding non-indented line
 380 pub fn tablify(input: impl std::io::Read) -> Result<HTML, std::io::Error> {
 381     let (rows, config) = read_input(input)?;
 382     let columns = column_order(&config, &rows);
 383     Ok(HTML(format!(
 384         "{HEADER}{}{}{FOOTER}",
 385         render_column_headers(&config, &columns),
 386         rows.into_iter()
 387             .map(|mut r| render_row(&config, &columns, &mut r))
 388             .collect::<HTML>()
 389     )))
 390 }
 391
 392 #[cfg(test)]
 393 mod tests {
 394     use super::*;
 395
 396     #[test]
 397     fn test_parse_line() {
 398         assert_eq!(InputLine::from(""), InputLine::Blank);
 399         assert_eq!(InputLine::from(" "), InputLine::Blank);
 400         assert_eq!(InputLine::from("foo"), InputLine::RowHeader("foo"));
 401         assert_eq!(InputLine::from("foo "), InputLine::RowHeader("foo"));
 402         assert_eq!(InputLine::from(" foo"), InputLine::Entry("foo", None));
 403         assert_eq!(
 404             InputLine::from(" foo:bar"),
 405             InputLine::Entry("foo", Some("bar"))
 406         );
 407         assert_eq!(
 408             InputLine::from(" foo: bar"),
 409             InputLine::Entry("foo", Some("bar"))
 410         );
 411         assert_eq!(
 412             InputLine::from(" foo: bar "),
 413             InputLine::Entry("foo", Some("bar"))
 414         );
 415         assert_eq!(
 416             InputLine::from(" foo:  bar "),
 417             InputLine::Entry("foo", Some("bar"))
 418         );
 419         assert_eq!(
 420             InputLine::from(" foo :  bar "),
 421             InputLine::Entry("foo", Some("bar"))
 422         );
 423     }
 424
 425     fn read_rows(input: impl std::io::Read) -> Result<Vec<Rowlike>, std::io::Error> {
 426         read_input(input).map(|(rows, _)| rows)
 427     }
 428     fn read_config(input: impl std::io::Read) -> Result<Config, std::io::Error> {
 429         read_input(input).map(|(_, config)| config)
 430     }
 431     #[test]
 432     fn test_read_rows() {
 433         assert_eq!(
 434             read_rows(&b"foo"[..]).unwrap(),
 435             vec![Rowlike::Row(Row {
 436                 label: "foo".to_owned(),
 437                 entries: HashMap::new(),
 438             })]
 439         );
 440         assert_eq!(
 441             read_rows(&b"bar"[..]).unwrap(),
 442             vec![Rowlike::Row(Row {
 443                 label: "bar".to_owned(),
 444                 entries: HashMap::new(),
 445             })]
 446         );
 447         assert_eq!(
 448             read_rows(&b"foo\nbar\n"[..]).unwrap(),
 449             vec![
 450                 Rowlike::Row(Row {
 451                     label: "foo".to_owned(),
 452                     entries: HashMap::new(),
 453                 }),
 454                 Rowlike::Row(Row {
 455                     label: "bar".to_owned(),
 456                     entries: HashMap::new(),
 457                 })
 458             ]
 459         );
 460         assert_eq!(
 461             read_rows(&b"foo\n bar\n"[..]).unwrap(),
 462             vec![Rowlike::Row(Row {
 463                 label: "foo".to_owned(),
 464                 entries: HashMap::from([("bar".to_owned(), vec![None])]),
 465             })]
 466         );
 467         assert_eq!(
 468             read_rows(&b"foo\n bar\n baz\n"[..]).unwrap(),
 469             vec![Rowlike::Row(Row {
 470                 label: "foo".to_owned(),
 471                 entries: HashMap::from([
 472                     ("bar".to_owned(), vec![None]),
 473                     ("baz".to_owned(), vec![None])
 474                 ]),
 475             })]
 476         );
 477         assert_eq!(
 478             read_rows(&b"foo\n\nbar\n"[..]).unwrap(),
 479             vec![
 480                 Rowlike::Row(Row {
 481                     label: "foo".to_owned(),
 482                     entries: HashMap::new(),
 483                 }),
 484                 Rowlike::Row(Row {
 485                     label: "bar".to_owned(),
 486                     entries: HashMap::new(),
 487                 })
 488             ]
 489         );
 490         assert_eq!(
 491             read_rows(&b"foo\n\n\nbar\n"[..]).unwrap(),
 492             vec![
 493                 Rowlike::Row(Row {
 494                     label: "foo".to_owned(),
 495                     entries: HashMap::new(),
 496                 }),
 497                 Rowlike::Spacer,
 498                 Rowlike::Row(Row {
 499                     label: "bar".to_owned(),
 500                     entries: HashMap::new(),
 501                 })
 502             ]
 503         );
 504         assert_eq!(
 505             read_rows(&b"foo\n \nbar\n"[..]).unwrap(),
 506             vec![
 507                 Rowlike::Row(Row {
 508                     label: "foo".to_owned(),
 509                     entries: HashMap::new(),
 510                 }),
 511                 Rowlike::Row(Row {
 512                     label: "bar".to_owned(),
 513                     entries: HashMap::new(),
 514                 })
 515             ]
 516         );
 517         assert_eq!(
 518             read_rows(&b"foo  \n bar  \n"[..]).unwrap(),
 519             vec![Rowlike::Row(Row {
 520                 label: "foo".to_owned(),
 521                 entries: HashMap::from([("bar".to_owned(), vec![None])]),
 522             })]
 523         );
 524
 525         let bad = read_rows(&b" foo"[..]);
 526         assert!(bad.is_err());
 527         assert!(format!("{bad:?}").contains("line 1: Entry with no header"));
 528
 529         let bad2 = read_rows(&b"foo\n\n bar"[..]);
 530         assert!(bad2.is_err());
 531         assert!(format!("{bad2:?}").contains("line 3: Entry with no header"));
 532     }
 533
 534     #[test]
 535     fn test_read_config() {
 536         assert_eq!(
 537             read_config(&b"!col_threshold 10"[..])
 538                 .unwrap()
 539                 .column_threshold,
 540             10
 541         );
 542         assert_eq!(
 543             read_config(&b"!col foo"[..]).unwrap().static_columns,
 544             vec![Some("foo".to_owned())]
 545         );
 546
 547         let bad_command = read_config(&b"!no such command"[..]);
 548         assert!(bad_command.is_err());
 549         assert!(format!("{bad_command:?}").contains("line 1: Unknown command"));
 550
 551         let bad_num = read_config(&b"!col_threshold foo"[..]);
 552         assert!(bad_num.is_err());
 553         assert!(format!("{bad_num:?}").contains("line 1: col_threshold must be numeric"));
 554     }
 555
 556     #[test]
 557     fn test_column_counts() {
 558         assert_eq!(
 559             column_counts(&read_rows(&b"foo\n bar\n baz\n"[..]).unwrap()),
 560             vec![(1, String::from("bar")), (1, String::from("baz"))]
 561         );
 562         assert_eq!(
 563             column_counts(&read_rows(&b"foo\n bar\n baz\nquux\n baz"[..]).unwrap()),
 564             vec![(2, String::from("baz")), (1, String::from("bar"))]
 565         );
 566         assert_eq!(
 567             column_counts(&read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..]).unwrap()),
 568             vec![(2, String::from("baz")), (1, String::from("bar"))]
 569         );
 570         assert_eq!(
 571             column_counts(
 572                 &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..]).unwrap()
 573             ),
 574             vec![(2, String::from("baz")), (1, String::from("bar"))]
 575         );
 576     }
 577
 578     #[test]
 579     fn test_render_cell() {
 580         assert_eq!(
 581             render_cell(
 582                 "foo",
 583                 &mut Row {
 584                     label: "nope".to_owned(),
 585                     entries: HashMap::new(),
 586                 }
 587             ),
 588             HTML::from(
 589                 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 590             )
 591         );
 592         assert_eq!(
 593             render_cell(
 594                 "foo",
 595                 &mut Row {
 596                     label: "nope".to_owned(),
 597                     entries: HashMap::from([("bar".to_owned(), vec![None])]),
 598                 }
 599             ),
 600             HTML::from(
 601                 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 602             )
 603         );
 604         assert_eq!(
 605             render_cell(
 606                 "foo",
 607                 &mut Row {
 608                     label: "nope".to_owned(),
 609                     entries: HashMap::from([("foo".to_owned(), vec![None])]),
 610                 }
 611             ),
 612             HTML::from(
 613                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 614             )
 615         );
 616         assert_eq!(
 617             render_cell(
 618                 "foo",
 619                 &mut Row {
 620                     label: "nope".to_owned(),
 621                     entries: HashMap::from([("foo".to_owned(), vec![None, None])]),
 622                 }
 623             ),
 624             HTML::from(
 625                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">2</td>"#
 626             )
 627         );
 628         assert_eq!(
 629             render_cell(
 630                 "foo",
 631                 &mut Row {
 632                     label: "nope".to_owned(),
 633                     entries: HashMap::from([(
 634                         "foo".to_owned(),
 635                         vec![Some("5".to_owned()), Some("10".to_owned())]
 636                     )]),
 637                 }
 638             ),
 639             HTML::from(
 640                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 10</td>"#
 641             )
 642         );
 643         assert_eq!(
 644             render_cell(
 645                 "foo",
 646                 &mut Row {
 647                     label: "nope".to_owned(),
 648                     entries: HashMap::from([("foo".to_owned(), vec![Some("5".to_owned()), None])]),
 649                 }
 650             ),
 651             HTML::from(
 652                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 ✓</td>"#
 653             )
 654         );
 655         assert_eq!(
 656             render_cell(
 657                 "heart",
 658                 &mut Row {
 659                     label: "nope".to_owned(),
 660                     entries: HashMap::from([("heart".to_owned(), vec![Some("<3".to_owned())])]),
 661                 }
 662             ),
 663             HTML::from(
 664                 r#"<td class="yes" onmouseover="h2('nope','heart')" onmouseout="ch2('nope','heart')">&lt;3</td>"#
 665             )
 666         );
 667         assert_eq!(
 668             render_cell(
 669                 "foo",
 670                 &mut Row {
 671                     label: "bob's".to_owned(),
 672                     entries: HashMap::from([("foo".to_owned(), vec![None])]),
 673                 }
 674             ),
 675             HTML::from(
 676                 r#"<td class="yes" onmouseover="h2('bob&#39;s','foo')" onmouseout="ch2('bob&#39;s','foo')"></td>"#
 677             )
 678         );
 679         let mut r = Row {
 680             label: "nope".to_owned(),
 681             entries: HashMap::from([
 682                 ("foo".to_owned(), vec![None]),
 683                 ("baz".to_owned(), vec![None]),
 684             ]),
 685         };
 686         assert_eq!(r.entries.len(), 2);
 687         render_cell("foo", &mut r);
 688         assert_eq!(r.entries.len(), 1);
 689         render_cell("bar", &mut r);
 690         assert_eq!(r.entries.len(), 1);
 691         render_cell("baz", &mut r);
 692         assert_eq!(r.entries.len(), 0);
 693     }
 694
 695     #[test]
 696     fn test_render_leftovers() {
 697         assert_eq!(
 698             render_all_leftovers(&Row {
 699                 label: "nope".to_owned(),
 700                 entries: HashMap::from([("foo".to_owned(), vec![None])]),
 701             }),
 702             HTML::from("foo")
 703         );
 704         assert_eq!(
 705             render_all_leftovers(&Row {
 706                 label: "nope".to_owned(),
 707                 entries: HashMap::from([
 708                     ("foo".to_owned(), vec![None]),
 709                     ("bar".to_owned(), vec![None])
 710                 ]),
 711             }),
 712             HTML::from("bar, foo")
 713         );
 714         assert_eq!(
 715             render_all_leftovers(&Row {
 716                 label: "nope".to_owned(),
 717                 entries: HashMap::from([
 718                     ("foo".to_owned(), vec![None]),
 719                     ("bar".to_owned(), vec![None, None])
 720                 ]),
 721             }),
 722             HTML::from("bar: 2, foo")
 723         );
 724     }
 725
 726     #[test]
 727     fn test_render_row() {
 728         assert_eq!(
 729             render_row(
 730                 &Config::default(),
 731                 &["foo".to_owned()],
 732                 &mut Rowlike::Row(Row {
 733                     label: "nope".to_owned(),
 734                     entries: HashMap::from([("bar".to_owned(), vec![None])]),
 735                 })
 736             ),
 737             HTML::from(
 738                 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>
 739 "#
 740             )
 741         );
 742         assert_eq!(
 743             render_row(
 744                 &Config {
 745                     column_threshold: 0,
 746                     static_columns: vec![Some("foo".to_owned()), Some("bar".to_owned())],
 747                 },
 748                 &["baz".to_owned()],
 749                 &mut Rowlike::Row(Row {
 750                     label: "nope".to_owned(),
 751                     entries: HashMap::from([
 752                         ("bar".to_owned(), vec![Some("r".to_owned())]),
 753                         ("baz".to_owned(), vec![Some("z".to_owned())]),
 754                         ("foo".to_owned(), vec![Some("f".to_owned())]),
 755                     ]),
 756                 })
 757             ),
 758             HTML::from(
 759                 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>
 760 "#
 761             )
 762         );
 763         assert_eq!(
 764             render_row(
 765                 &Config {
 766                     column_threshold: 0,
 767                     static_columns: vec![Some("foo".to_owned()), None, Some("bar".to_owned())],
 768                 },
 769                 &[],
 770                 &mut Rowlike::Row(Row {
 771                     label: "nope".to_owned(),
 772                     entries: HashMap::from([
 773                         ("bar".to_owned(), vec![Some("r".to_owned())]),
 774                         ("foo".to_owned(), vec![Some("f".to_owned())]),
 775                     ]),
 776                 })
 777             ),
 778             HTML::from(
 779                 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>
 780 "#
 781             )
 782         );
 783     }
 784 }