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.
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());
51 code_map.new_filemap_and_lines("test.rs", None, &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);
84 lo: BytePos(start as u32),
85 hi: BytePos(end as u32),
90 fn make_pos(file_text: &str, pos: &Position) -> usize {
91 let mut remainder = file_text;
93 for _ in 0..pos.count {
94 if let Some(n) = remainder.find(&pos.string) {
96 remainder = &remainder[n + 1..];
98 panic!("failed to find {} instances of {:?} in {:?}",
191 label: "`X` is a good letter",
202 label: "`Y` is a good letter too",
215 | ||____^__- `Y` is a good letter too
217 | `X` is a good letter
240 label: "`X` is a good letter",
251 label: "`Y` is a good letter too",
263 | ||____-__^ `X` is a good letter
265 | `Y` is a good letter too
271 fn different_overlap() {
290 label: "`X` is a good letter",
301 label: "`Y` is a good letter too",
313 | ||____^ `X` is a good letter
315 | |_____- `Y` is a good letter too
321 fn triple_overlap() {
339 label: "`X` is a good letter",
350 label: "`Y` is a good letter too",
375 | |||____^__-__- `Z` label
377 | |____| `Y` is a good letter too
378 | `X` is a good letter
403 label: "`X` is a good letter",
414 label: "`Y` is a good letter too",
437 | | `X` is a good letter
439 | |____-______- `Y` is a good letter too
449 fn non_overlaping() {
468 label: "`X` is a good letter",
479 label: "`Y` is a good letter too",
488 | |____^ `X` is a good letter
492 | |__________- `Y` is a good letter too
498 fn overlaping_start_and_end() {
517 label: "`X` is a good letter",
528 label: "`Y` is a good letter too",
540 | | `X` is a good letter
543 | |___________- `Y` is a good letter too
549 fn multiple_labels_primary_without_message() {
576 label: "`a` is a good letter",
595 | ----^^^^-^^-- `a` is a good letter
601 fn multiple_labels_secondary_without_message() {
617 label: "`a` is a good letter",
636 | ^^^^-------^^ `a` is a good letter
642 fn multiple_labels_primary_without_message_2() {
658 label: "`b` is a good letter",
690 | `b` is a good letter
696 fn multiple_labels_secondary_without_message_2() {
723 label: "`b` is a good letter",
733 | `b` is a good letter
739 fn multiple_labels_without_message() {
780 fn multiple_labels_without_message_2() {
832 fn multiple_labels_with_message() {
848 label: "`a` is a good letter",
859 label: "`b` is a good letter",
869 | | `b` is a good letter
870 | `a` is a good letter
876 fn single_label_with_message() {
892 label: "`a` is a good letter",
900 | ^^^^^^^^^^^^^ `a` is a good letter
906 fn single_label_without_message() {
965 label: "`X` is a good letter",
976 label: "`Y` is a good letter too",
988 | | `X` is a good letter
995 | |___________- `Y` is a good letter too
1001 fn long_snippet_multiple_spans() {
1030 label: "`Y` is a good letter",
1041 label: "`Z` is a good letter too",
1059 | ||__________- `Z` is a good letter too
1063 | |_______^ `Y` is a good letter