1068 lines
20 KiB
Rust
1068 lines
20 KiB
Rust
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use codemap::{CodeMap, FilePathMapping};
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use errors::Handler;
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use errors::emitter::EmitterWriter;
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use std::io;
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use std::io::prelude::*;
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use std::rc::Rc;
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use std::str;
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use std::sync::{Arc, Mutex};
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use syntax_pos::{BytePos, NO_EXPANSION, Span, MultiSpan};
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/// Identify a position in the text by the Nth occurrence of a string.
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struct Position {
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string: &'static str,
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count: usize,
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}
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struct SpanLabel {
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start: Position,
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end: Position,
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label: &'static str,
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}
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struct Shared<T: Write> {
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data: Arc<Mutex<T>>,
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}
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impl<T: Write> Write for Shared<T> {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
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self.data.lock().unwrap().write(buf)
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}
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fn flush(&mut self) -> io::Result<()> {
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self.data.lock().unwrap().flush()
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}
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}
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fn test_harness(file_text: &str, span_labels: Vec<SpanLabel>, expected_output: &str) {
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let output = Arc::new(Mutex::new(Vec::new()));
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let code_map = Rc::new(CodeMap::new(FilePathMapping::empty()));
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code_map.new_filemap_and_lines("test.rs", &file_text);
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let primary_span = make_span(&file_text, &span_labels[0].start, &span_labels[0].end);
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let mut msp = MultiSpan::from_span(primary_span);
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for span_label in span_labels {
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let span = make_span(&file_text, &span_label.start, &span_label.end);
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msp.push_span_label(span, span_label.label.to_string());
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println!("span: {:?} label: {:?}", span, span_label.label);
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println!("text: {:?}", code_map.span_to_snippet(span));
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}
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let emitter = EmitterWriter::new(Box::new(Shared { data: output.clone() }),
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Some(code_map.clone()));
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let handler = Handler::with_emitter(true, false, Box::new(emitter));
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handler.span_err(msp, "foo");
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assert!(expected_output.chars().next() == Some('\n'),
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"expected output should begin with newline");
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let expected_output = &expected_output[1..];
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let bytes = output.lock().unwrap();
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let actual_output = str::from_utf8(&bytes).unwrap();
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println!("expected output:\n------\n{}------", expected_output);
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println!("actual output:\n------\n{}------", actual_output);
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assert!(expected_output == actual_output)
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}
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fn make_span(file_text: &str, start: &Position, end: &Position) -> Span {
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let start = make_pos(file_text, start);
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let end = make_pos(file_text, end) + end.string.len(); // just after matching thing ends
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assert!(start <= end);
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Span {
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lo: BytePos(start as u32),
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hi: BytePos(end as u32),
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ctxt: NO_EXPANSION,
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}
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}
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fn make_pos(file_text: &str, pos: &Position) -> usize {
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let mut remainder = file_text;
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let mut offset = 0;
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for _ in 0..pos.count {
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if let Some(n) = remainder.find(&pos.string) {
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offset += n;
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remainder = &remainder[n + 1..];
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} else {
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panic!("failed to find {} instances of {:?} in {:?}",
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pos.count,
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pos.string,
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file_text);
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}
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}
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offset
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}
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#[test]
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fn ends_on_col0() {
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test_harness(r#"
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fn foo() {
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "{",
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count: 1,
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},
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end: Position {
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string: "}",
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count: 1,
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},
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label: "test",
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},
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],
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r#"
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error: foo
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--> test.rs:2:10
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2 | fn foo() {
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| __________^
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3 | | }
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| |_^ test
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"#);
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}
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#[test]
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fn ends_on_col2() {
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test_harness(r#"
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fn foo() {
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "{",
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count: 1,
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},
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end: Position {
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string: "}",
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count: 1,
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},
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label: "test",
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},
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],
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r#"
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error: foo
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--> test.rs:2:10
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2 | fn foo() {
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| __________^
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3 | |
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4 | |
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5 | | }
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| |___^ test
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"#);
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}
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#[test]
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fn non_nested() {
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test_harness(r#"
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fn foo() {
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X0 Y0
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X1 Y1
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X2 Y2
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "X0",
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count: 1,
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},
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end: Position {
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string: "X2",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Y0",
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count: 1,
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},
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end: Position {
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string: "Y2",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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],
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r#"
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error: foo
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--> test.rs:3:3
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3 | X0 Y0
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| ____^__-
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| | ___|
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| ||
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4 | || X1 Y1
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5 | || X2 Y2
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| ||____^__- `Y` is a good letter too
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| |____|
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| `X` is a good letter
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"#);
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}
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#[test]
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fn nested() {
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test_harness(r#"
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fn foo() {
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X0 Y0
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Y1 X1
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "X0",
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count: 1,
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},
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end: Position {
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string: "X1",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Y0",
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count: 1,
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},
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end: Position {
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string: "Y1",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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],
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r#"
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error: foo
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--> test.rs:3:3
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3 | X0 Y0
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| ____^__-
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| | ___|
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| ||
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4 | || Y1 X1
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| ||____-__^ `X` is a good letter
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| |_____|
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| `Y` is a good letter too
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"#);
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}
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#[test]
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fn different_overlap() {
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test_harness(r#"
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fn foo() {
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X0 Y0 Z0
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X1 Y1 Z1
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X2 Y2 Z2
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X3 Y3 Z3
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "Y0",
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count: 1,
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},
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end: Position {
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string: "X2",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Z1",
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count: 1,
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},
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end: Position {
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string: "X3",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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],
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r#"
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error: foo
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--> test.rs:3:6
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3 | X0 Y0 Z0
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| ______^
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4 | | X1 Y1 Z1
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| |_________-
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5 | || X2 Y2 Z2
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| ||____^ `X` is a good letter
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6 | | X3 Y3 Z3
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| |_____- `Y` is a good letter too
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"#);
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}
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#[test]
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fn triple_overlap() {
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test_harness(r#"
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fn foo() {
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X0 Y0 Z0
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X1 Y1 Z1
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X2 Y2 Z2
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "X0",
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count: 1,
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},
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end: Position {
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string: "X2",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Y0",
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count: 1,
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},
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end: Position {
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string: "Y2",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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SpanLabel {
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start: Position {
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string: "Z0",
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count: 1,
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},
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end: Position {
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string: "Z2",
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count: 1,
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},
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label: "`Z` label",
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},
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],
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r#"
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error: foo
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--> test.rs:3:3
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3 | X0 Y0 Z0
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| _____^__-__-
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| | ____|__|
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| || ___|
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| |||
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4 | ||| X1 Y1 Z1
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5 | ||| X2 Y2 Z2
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| |||____^__-__- `Z` label
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| ||____|__|
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| |____| `Y` is a good letter too
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| `X` is a good letter
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"#);
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}
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#[test]
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fn minimum_depth() {
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test_harness(r#"
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fn foo() {
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X0 Y0 Z0
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X1 Y1 Z1
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X2 Y2 Z2
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X3 Y3 Z3
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "Y0",
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count: 1,
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},
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end: Position {
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string: "X1",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Y1",
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count: 1,
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},
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end: Position {
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string: "Z2",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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SpanLabel {
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start: Position {
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string: "X2",
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count: 1,
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},
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end: Position {
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string: "Y3",
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count: 1,
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},
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label: "`Z`",
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},
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],
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r#"
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error: foo
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--> test.rs:3:6
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3 | X0 Y0 Z0
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| ______^
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4 | | X1 Y1 Z1
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| |____^_-
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| ||____|
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| | `X` is a good letter
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5 | | X2 Y2 Z2
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| |____-______- `Y` is a good letter too
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| ____|
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| |
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6 | | X3 Y3 Z3
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| |________- `Z`
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"#);
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}
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#[test]
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fn non_overlaping() {
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test_harness(r#"
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fn foo() {
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X0 Y0 Z0
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X1 Y1 Z1
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X2 Y2 Z2
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X3 Y3 Z3
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "X0",
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count: 1,
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},
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end: Position {
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string: "X1",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Y2",
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count: 1,
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},
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end: Position {
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string: "Z3",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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],
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r#"
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error: foo
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--> test.rs:3:3
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3 | / X0 Y0 Z0
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4 | | X1 Y1 Z1
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| |____^ `X` is a good letter
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5 | X2 Y2 Z2
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| ______-
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6 | | X3 Y3 Z3
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| |__________- `Y` is a good letter too
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"#);
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}
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#[test]
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fn overlaping_start_and_end() {
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test_harness(r#"
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fn foo() {
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X0 Y0 Z0
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X1 Y1 Z1
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X2 Y2 Z2
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X3 Y3 Z3
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "Y0",
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count: 1,
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},
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end: Position {
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string: "X1",
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count: 1,
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},
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label: "`X` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "Z1",
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count: 1,
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},
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end: Position {
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string: "Z3",
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count: 1,
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},
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label: "`Y` is a good letter too",
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},
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],
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r#"
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error: foo
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--> test.rs:3:6
|
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|
|
|
3 | X0 Y0 Z0
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| ______^
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4 | | X1 Y1 Z1
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|
| |____^____-
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| ||____|
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|
| | `X` is a good letter
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5 | | X2 Y2 Z2
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6 | | X3 Y3 Z3
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| |___________- `Y` is a good letter too
|
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|
"#);
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}
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|
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#[test]
|
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fn multiple_labels_primary_without_message() {
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test_harness(r#"
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fn foo() {
|
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a { b { c } d }
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}
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"#,
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vec![
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SpanLabel {
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start: Position {
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string: "b",
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count: 1,
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},
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end: Position {
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string: "}",
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count: 1,
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},
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label: "",
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},
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SpanLabel {
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start: Position {
|
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string: "a",
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count: 1,
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},
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end: Position {
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string: "d",
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count: 1,
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},
|
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label: "`a` is a good letter",
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},
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SpanLabel {
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start: Position {
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string: "c",
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count: 1,
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},
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end: Position {
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string: "c",
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count: 1,
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},
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label: "",
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},
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],
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r#"
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|
error: foo
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--> test.rs:3:7
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|
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3 | a { b { c } d }
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| ----^^^^-^^-- `a` is a good letter
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|
"#);
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}
|
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|
|
#[test]
|
|
fn multiple_labels_secondary_without_message() {
|
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test_harness(r#"
|
|
fn foo() {
|
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a { b { c } d }
|
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}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
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string: "a",
|
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count: 1,
|
|
},
|
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end: Position {
|
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string: "d",
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count: 1,
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},
|
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label: "`a` is a good letter",
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},
|
|
SpanLabel {
|
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start: Position {
|
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string: "b",
|
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count: 1,
|
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},
|
|
end: Position {
|
|
string: "}",
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count: 1,
|
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},
|
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label: "",
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},
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],
|
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r#"
|
|
error: foo
|
|
--> test.rs:3:3
|
|
|
|
|
3 | a { b { c } d }
|
|
| ^^^^-------^^ `a` is a good letter
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn multiple_labels_primary_without_message_2() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "b",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "}",
|
|
count: 1,
|
|
},
|
|
label: "`b` is a good letter",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "c",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "c",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:7
|
|
|
|
|
3 | a { b { c } d }
|
|
| ----^^^^-^^--
|
|
| |
|
|
| `b` is a good letter
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn multiple_labels_secondary_without_message_2() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "b",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "}",
|
|
count: 1,
|
|
},
|
|
label: "`b` is a good letter",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:3
|
|
|
|
|
3 | a { b { c } d }
|
|
| ^^^^-------^^
|
|
| |
|
|
| `b` is a good letter
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn multiple_labels_without_message() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "b",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "}",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:3
|
|
|
|
|
3 | a { b { c } d }
|
|
| ^^^^-------^^
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn multiple_labels_without_message_2() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "b",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "}",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "c",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "c",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:7
|
|
|
|
|
3 | a { b { c } d }
|
|
| ----^^^^-^^--
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn multiple_labels_with_message() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "`a` is a good letter",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "b",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "}",
|
|
count: 1,
|
|
},
|
|
label: "`b` is a good letter",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:3
|
|
|
|
|
3 | a { b { c } d }
|
|
| ^^^^-------^^
|
|
| | |
|
|
| | `b` is a good letter
|
|
| `a` is a good letter
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn single_label_with_message() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "`a` is a good letter",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:3
|
|
|
|
|
3 | a { b { c } d }
|
|
| ^^^^^^^^^^^^^ `a` is a good letter
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn single_label_without_message() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
a { b { c } d }
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "a",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "d",
|
|
count: 1,
|
|
},
|
|
label: "",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:3
|
|
|
|
|
3 | a { b { c } d }
|
|
| ^^^^^^^^^^^^^
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn long_snippet() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
X0 Y0 Z0
|
|
X1 Y1 Z1
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
6
|
|
7
|
|
8
|
|
9
|
|
10
|
|
X2 Y2 Z2
|
|
X3 Y3 Z3
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "Y0",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "X1",
|
|
count: 1,
|
|
},
|
|
label: "`X` is a good letter",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "Z1",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "Z3",
|
|
count: 1,
|
|
},
|
|
label: "`Y` is a good letter too",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:6
|
|
|
|
|
3 | X0 Y0 Z0
|
|
| ______^
|
|
4 | | X1 Y1 Z1
|
|
| |____^____-
|
|
| ||____|
|
|
| | `X` is a good letter
|
|
5 | | 1
|
|
6 | | 2
|
|
7 | | 3
|
|
... |
|
|
15 | | X2 Y2 Z2
|
|
16 | | X3 Y3 Z3
|
|
| |___________- `Y` is a good letter too
|
|
|
|
"#);
|
|
}
|
|
|
|
#[test]
|
|
fn long_snippet_multiple_spans() {
|
|
test_harness(r#"
|
|
fn foo() {
|
|
X0 Y0 Z0
|
|
1
|
|
2
|
|
3
|
|
X1 Y1 Z1
|
|
4
|
|
5
|
|
6
|
|
X2 Y2 Z2
|
|
7
|
|
8
|
|
9
|
|
10
|
|
X3 Y3 Z3
|
|
}
|
|
"#,
|
|
vec![
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "Y0",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "Y3",
|
|
count: 1,
|
|
},
|
|
label: "`Y` is a good letter",
|
|
},
|
|
SpanLabel {
|
|
start: Position {
|
|
string: "Z1",
|
|
count: 1,
|
|
},
|
|
end: Position {
|
|
string: "Z2",
|
|
count: 1,
|
|
},
|
|
label: "`Z` is a good letter too",
|
|
},
|
|
],
|
|
r#"
|
|
error: foo
|
|
--> test.rs:3:6
|
|
|
|
|
3 | X0 Y0 Z0
|
|
| ______^
|
|
4 | | 1
|
|
5 | | 2
|
|
6 | | 3
|
|
7 | | X1 Y1 Z1
|
|
| |_________-
|
|
8 | || 4
|
|
9 | || 5
|
|
10 | || 6
|
|
11 | || X2 Y2 Z2
|
|
| ||__________- `Z` is a good letter too
|
|
... |
|
|
15 | | 10
|
|
16 | | X3 Y3 Z3
|
|
| |_______^ `Y` is a good letter
|
|
|
|
"#);
|
|
}
|
|
|