1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use codemap::{CodeMap, FilePathMapping};
13 use errors::emitter::EmitterWriter;
15 use std::io::prelude::*;
18 use std::sync::{Arc, Mutex};
19 use syntax_pos::{BytePos, NO_EXPANSION, Span, MultiSpan};
21 /// Identify a position in the text by the Nth occurrence of a string.
33 struct Shared<T: Write> {
37 impl<T: Write> Write for Shared<T> {
38 fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
39 self.data.lock().unwrap().write(buf)
42 fn flush(&mut self) -> io::Result<()> {
43 self.data.lock().unwrap().flush()
47 fn test_harness(file_text: &str, span_labels: Vec<SpanLabel>, expected_output: &str) {
48 let output = Arc::new(Mutex::new(Vec::new()));
50 let code_map = Rc::new(CodeMap::new(FilePathMapping::empty()));
51 code_map.new_filemap_and_lines("test.rs", &file_text);
53 let primary_span = make_span(&file_text, &span_labels[0].start, &span_labels[0].end);
54 let mut msp = MultiSpan::from_span(primary_span);
55 for span_label in span_labels {
56 let span = make_span(&file_text, &span_label.start, &span_label.end);
57 msp.push_span_label(span, span_label.label.to_string());
58 println!("span: {:?} label: {:?}", span, span_label.label);
59 println!("text: {:?}", code_map.span_to_snippet(span));
62 let emitter = EmitterWriter::new(Box::new(Shared { data: output.clone() }),
63 Some(code_map.clone()));
64 let handler = Handler::with_emitter(true, false, Box::new(emitter));
65 handler.span_err(msp, "foo");
67 assert!(expected_output.chars().next() == Some('\n'),
68 "expected output should begin with newline");
69 let expected_output = &expected_output[1..];
71 let bytes = output.lock().unwrap();
72 let actual_output = str::from_utf8(&bytes).unwrap();
73 println!("expected output:\n------\n{}------", expected_output);
74 println!("actual output:\n------\n{}------", actual_output);
76 assert!(expected_output == actual_output)
79 fn make_span(file_text: &str, start: &Position, end: &Position) -> Span {
80 let start = make_pos(file_text, start);
81 let end = make_pos(file_text, end) + end.string.len(); // just after matching thing ends
82 assert!(start <= end);
83 Span::new(BytePos(start as u32), BytePos(end as u32), NO_EXPANSION)
86 fn make_pos(file_text: &str, pos: &Position) -> usize {
87 let mut remainder = file_text;
89 for _ in 0..pos.count {
90 if let Some(n) = remainder.find(&pos.string) {
92 remainder = &remainder[n + 1..];
94 panic!("failed to find {} instances of {:?} in {:?}",
187 label: "`X` is a good letter",
198 label: "`Y` is a good letter too",
211 | ||____^__- `Y` is a good letter too
213 | `X` is a good letter
236 label: "`X` is a good letter",
247 label: "`Y` is a good letter too",
259 | ||____-__^ `X` is a good letter
261 | `Y` is a good letter too
267 fn different_overlap() {
286 label: "`X` is a good letter",
297 label: "`Y` is a good letter too",
309 | ||____^ `X` is a good letter
311 | |_____- `Y` is a good letter too
317 fn triple_overlap() {
335 label: "`X` is a good letter",
346 label: "`Y` is a good letter too",
371 | |||____^__-__- `Z` label
373 | |____| `Y` is a good letter too
374 | `X` is a good letter
399 label: "`X` is a good letter",
410 label: "`Y` is a good letter too",
433 | | `X` is a good letter
435 | |____-______- `Y` is a good letter too
445 fn non_overlaping() {
464 label: "`X` is a good letter",
475 label: "`Y` is a good letter too",
484 | |____^ `X` is a good letter
488 | |__________- `Y` is a good letter too
494 fn overlaping_start_and_end() {
513 label: "`X` is a good letter",
524 label: "`Y` is a good letter too",
536 | | `X` is a good letter
539 | |___________- `Y` is a good letter too
545 fn multiple_labels_primary_without_message() {
572 label: "`a` is a good letter",
591 | ----^^^^-^^-- `a` is a good letter
597 fn multiple_labels_secondary_without_message() {
613 label: "`a` is a good letter",
632 | ^^^^-------^^ `a` is a good letter
638 fn multiple_labels_primary_without_message_2() {
654 label: "`b` is a good letter",
686 | `b` is a good letter
692 fn multiple_labels_secondary_without_message_2() {
719 label: "`b` is a good letter",
729 | `b` is a good letter
735 fn multiple_labels_secondary_without_message_3() {
751 label: "`a` is a good letter",
772 | `a` is a good letter
778 fn multiple_labels_without_message() {
819 fn multiple_labels_without_message_2() {
871 fn multiple_labels_with_message() {
887 label: "`a` is a good letter",
898 label: "`b` is a good letter",
908 | | `b` is a good letter
909 | `a` is a good letter
915 fn single_label_with_message() {
931 label: "`a` is a good letter",
939 | ^^^^^^^^^^^^^ `a` is a good letter
945 fn single_label_without_message() {
1004 label: "`X` is a good letter",
1015 label: "`Y` is a good letter too",
1027 | | `X` is a good letter
1034 | |___________- `Y` is a good letter too
1040 fn long_snippet_multiple_spans() {
1069 label: "`Y` is a good letter",
1080 label: "`Z` is a good letter too",
1098 | ||__________- `Z` is a good letter too
1102 | |_______^ `Y` is a good letter