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// Copyright 2018 The xi-editor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
extern crate xi_unicode;
use std::fs::File;
use std::io::BufReader;
use std::io::Read;
use xi_unicode::LineBreakIterator;
const TEST_FILE: &'static str = "tests/LineBreakTest.txt";
#[test]
fn line_break_test() {
let file = File::open(TEST_FILE).expect("unable to open test file.");
let mut reader = BufReader::new(file);
let mut buffer = String::new();
reader.read_to_string(&mut buffer).expect("failed to read test file.");
let mut failed_tests = Vec::new();
for full_test in buffer.lines().filter(|s| !s.starts_with('#')) {
let test = full_test.split('#').next().unwrap().trim();
let (string, breaks) = parse_test(test);
let xi_lb = LineBreakIterator::new(&string).map(|(idx, _)| idx).collect::<Vec<_>>();
if xi_lb != breaks {
failed_tests.push((full_test.to_string(), breaks, xi_lb));
}
}
if !failed_tests.is_empty() {
println!("\nFailed {} line break tests.", failed_tests.len());
for fail in failed_tests {
println!("Failed Test: {}", fail.0);
println!("Unicode Breaks: {:?}", fail.1);
println!("Xi Breaks: {:?}\n", fail.2);
}
panic!("failed line break test.");
}
}
// A typical test looks like: "× 0023 × 0308 × 0020 ÷ 0023 ÷"
fn parse_test(test: &str) -> (String, Vec<usize>) {
use std::char;
let mut parts = test.split(' ');
let mut idx = 0usize;
let mut string = String::new();
let mut breaks = Vec::new();
loop {
let next = parts.next();
if next.is_none() {
break;
}
if next != Some("×") && next != Some("÷") {
panic!("syntax error");
}
if next == Some("÷") {
breaks.push(idx);
}
if let Some(hex) = parts.next() {
let num = u32::from_str_radix(hex, 16).expect("syntax error");
let ch = char::from_u32(num).expect("invalid codepoint");
string.push(ch);
idx += ch.len_utf8();
} else {
break;
}
}
(string, breaks)
}
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