src/librustc_parse_format/tests.rs

   1 use super::*;
   2
   3 fn same(fmt: &'static str, p: &[Piece<'static>]) {
   4     let parser = Parser::new(fmt, None, None, false, ParseMode::Format);
   5     assert_eq!(parser.collect::<Vec<Piece<'static>>>(), p);
   6 }
   7
   8 fn fmtdflt() -> FormatSpec<'static> {
   9     return FormatSpec {
  10         fill: None,
  11         align: AlignUnknown,
  12         flags: 0,
  13         precision: CountImplied,
  14         width: CountImplied,
  15         precision_span: None,
  16         width_span: None,
  17         ty: "",
  18         ty_span: None,
  19     };
  20 }
  21
  22 fn musterr(s: &str) {
  23     let mut p = Parser::new(s, None, None, false, ParseMode::Format);
  24     p.next();
  25     assert!(!p.errors.is_empty());
  26 }
  27
  28 #[test]
  29 fn simple() {
  30     same("asdf", &[String("asdf")]);
  31     same("a{{b", &[String("a"), String("{b")]);
  32     same("a}}b", &[String("a"), String("}b")]);
  33     same("a}}", &[String("a"), String("}")]);
  34     same("}}", &[String("}")]);
  35     same("\\}}", &[String("\\"), String("}")]);
  36 }
  37
  38 #[test]
  39 fn invalid01() {
  40     musterr("{")
  41 }
  42 #[test]
  43 fn invalid02() {
  44     musterr("}")
  45 }
  46 #[test]
  47 fn invalid04() {
  48     musterr("{3a}")
  49 }
  50 #[test]
  51 fn invalid05() {
  52     musterr("{:|}")
  53 }
  54 #[test]
  55 fn invalid06() {
  56     musterr("{:>>>}")
  57 }
  58
  59 #[test]
  60 fn format_nothing() {
  61     same("{}", &[NextArgument(Argument { position: ArgumentImplicitlyIs(0), format: fmtdflt() })]);
  62 }
  63 #[test]
  64 fn format_position() {
  65     same("{3}", &[NextArgument(Argument { position: ArgumentIs(3), format: fmtdflt() })]);
  66 }
  67 #[test]
  68 fn format_position_nothing_else() {
  69     same("{3:}", &[NextArgument(Argument { position: ArgumentIs(3), format: fmtdflt() })]);
  70 }
  71 #[test]
  72 fn format_type() {
  73     same(
  74         "{3:x}",
  75         &[NextArgument(Argument {
  76             position: ArgumentIs(3),
  77             format: FormatSpec {
  78                 fill: None,
  79                 align: AlignUnknown,
  80                 flags: 0,
  81                 precision: CountImplied,
  82                 width: CountImplied,
  83                 precision_span: None,
  84                 width_span: None,
  85                 ty: "x",
  86                 ty_span: None,
  87             },
  88         })],
  89     );
  90 }
  91 #[test]
  92 fn format_align_fill() {
  93     same(
  94         "{3:>}",
  95         &[NextArgument(Argument {
  96             position: ArgumentIs(3),
  97             format: FormatSpec {
  98                 fill: None,
  99                 align: AlignRight,
 100                 flags: 0,
 101                 precision: CountImplied,
 102                 width: CountImplied,
 103                 precision_span: None,
 104                 width_span: None,
 105                 ty: "",
 106                 ty_span: None,
 107             },
 108         })],
 109     );
 110     same(
 111         "{3:0<}",
 112         &[NextArgument(Argument {
 113             position: ArgumentIs(3),
 114             format: FormatSpec {
 115                 fill: Some('0'),
 116                 align: AlignLeft,
 117                 flags: 0,
 118                 precision: CountImplied,
 119                 width: CountImplied,
 120                 precision_span: None,
 121                 width_span: None,
 122                 ty: "",
 123                 ty_span: None,
 124             },
 125         })],
 126     );
 127     same(
 128         "{3:*<abcd}",
 129         &[NextArgument(Argument {
 130             position: ArgumentIs(3),
 131             format: FormatSpec {
 132                 fill: Some('*'),
 133                 align: AlignLeft,
 134                 flags: 0,
 135                 precision: CountImplied,
 136                 width: CountImplied,
 137                 precision_span: None,
 138                 width_span: None,
 139                 ty: "abcd",
 140                 ty_span: Some(InnerSpan::new(6, 10)),
 141             },
 142         })],
 143     );
 144 }
 145 #[test]
 146 fn format_counts() {
 147     use rustc_span::{edition, SessionGlobals, SESSION_GLOBALS};
 148     SESSION_GLOBALS.set(&SessionGlobals::new(edition::DEFAULT_EDITION), || {
 149         same(
 150             "{:10x}",
 151             &[NextArgument(Argument {
 152                 position: ArgumentImplicitlyIs(0),
 153                 format: FormatSpec {
 154                     fill: None,
 155                     align: AlignUnknown,
 156                     flags: 0,
 157                     precision: CountImplied,
 158                     width: CountIs(10),
 159                     precision_span: None,
 160                     width_span: None,
 161                     ty: "x",
 162                     ty_span: None,
 163                 },
 164             })],
 165         );
 166         same(
 167             "{:10$.10x}",
 168             &[NextArgument(Argument {
 169                 position: ArgumentImplicitlyIs(0),
 170                 format: FormatSpec {
 171                     fill: None,
 172                     align: AlignUnknown,
 173                     flags: 0,
 174                     precision: CountIs(10),
 175                     width: CountIsParam(10),
 176                     precision_span: None,
 177                     width_span: Some(InnerSpan::new(3, 6)),
 178                     ty: "x",
 179                     ty_span: None,
 180                 },
 181             })],
 182         );
 183         same(
 184             "{:.*x}",
 185             &[NextArgument(Argument {
 186                 position: ArgumentImplicitlyIs(1),
 187                 format: FormatSpec {
 188                     fill: None,
 189                     align: AlignUnknown,
 190                     flags: 0,
 191                     precision: CountIsParam(0),
 192                     width: CountImplied,
 193                     precision_span: Some(InnerSpan::new(3, 5)),
 194                     width_span: None,
 195                     ty: "x",
 196                     ty_span: None,
 197                 },
 198             })],
 199         );
 200         same(
 201             "{:.10$x}",
 202             &[NextArgument(Argument {
 203                 position: ArgumentImplicitlyIs(0),
 204                 format: FormatSpec {
 205                     fill: None,
 206                     align: AlignUnknown,
 207                     flags: 0,
 208                     precision: CountIsParam(10),
 209                     width: CountImplied,
 210                     precision_span: Some(InnerSpan::new(3, 7)),
 211                     width_span: None,
 212                     ty: "x",
 213                     ty_span: None,
 214                 },
 215             })],
 216         );
 217         same(
 218             "{:a$.b$?}",
 219             &[NextArgument(Argument {
 220                 position: ArgumentImplicitlyIs(0),
 221                 format: FormatSpec {
 222                     fill: None,
 223                     align: AlignUnknown,
 224                     flags: 0,
 225                     precision: CountIsName(Symbol::intern("b")),
 226                     width: CountIsName(Symbol::intern("a")),
 227                     precision_span: None,
 228                     width_span: None,
 229                     ty: "?",
 230                     ty_span: None,
 231                 },
 232             })],
 233         );
 234     });
 235 }
 236 #[test]
 237 fn format_flags() {
 238     same(
 239         "{:-}",
 240         &[NextArgument(Argument {
 241             position: ArgumentImplicitlyIs(0),
 242             format: FormatSpec {
 243                 fill: None,
 244                 align: AlignUnknown,
 245                 flags: (1 << FlagSignMinus as u32),
 246                 precision: CountImplied,
 247                 width: CountImplied,
 248                 precision_span: None,
 249                 width_span: None,
 250                 ty: "",
 251                 ty_span: None,
 252             },
 253         })],
 254     );
 255     same(
 256         "{:+#}",
 257         &[NextArgument(Argument {
 258             position: ArgumentImplicitlyIs(0),
 259             format: FormatSpec {
 260                 fill: None,
 261                 align: AlignUnknown,
 262                 flags: (1 << FlagSignPlus as u32) | (1 << FlagAlternate as u32),
 263                 precision: CountImplied,
 264                 width: CountImplied,
 265                 precision_span: None,
 266                 width_span: None,
 267                 ty: "",
 268                 ty_span: None,
 269             },
 270         })],
 271     );
 272 }
 273 #[test]
 274 fn format_mixture() {
 275     same(
 276         "abcd {3:x} efg",
 277         &[
 278             String("abcd "),
 279             NextArgument(Argument {
 280                 position: ArgumentIs(3),
 281                 format: FormatSpec {
 282                     fill: None,
 283                     align: AlignUnknown,
 284                     flags: 0,
 285                     precision: CountImplied,
 286                     width: CountImplied,
 287                     precision_span: None,
 288                     width_span: None,
 289                     ty: "x",
 290                     ty_span: None,
 291                 },
 292             }),
 293             String(" efg"),
 294         ],
 295     );
 296 }