| /* Copyright 2018 The encode_unicode Developers |
| * |
| * Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or |
| * http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or |
| * http://opensource.org/licenses/MIT>, at your option. This file may not be |
| * copied, modified, or distributed except according to those terms. |
| */ |
| |
| //! Iterator tests |
| |
| #![cfg(feature="std")] |
| |
| extern crate encode_unicode; |
| |
| use encode_unicode::{IterExt, SliceExt, CharExt}; |
| use encode_unicode::iterator::Utf8CharSplitter; |
| use encode_unicode::error::InvalidUtf8Slice::*; |
| use encode_unicode::error::InvalidUtf8::*; |
| use encode_unicode::error::InvalidUtf8FirstByte::*; |
| use encode_unicode::error::InvalidCodepoint::*; |
| use encode_unicode::error::Utf16PairError::*; |
| use std::io::Read; |
| use std::cmp::min; |
| |
| #[test] fn utf8charmerger() { |
| let slice = b"\xf0\xa1\x92X\xcc\xbb"; |
| let mut iter = slice.iter().to_utf8chars(); |
| assert_eq!(iter.size_hint(), (1, Some(6))); |
| assert_eq!(format!("{:?}", &iter), |
| format!("Utf8CharMerger {{ buffered: [], inner: {:?} }}", slice.iter())); |
| |
| assert_eq!(iter.next(), Some(Err(Utf8(NotAContinuationByte(3))))); |
| assert_eq!(iter.size_hint(), (0, Some(5))); |
| assert_eq!( |
| format!("{:?}", &iter), |
| format!("Utf8CharMerger {{ buffered: [161, 146, 88], inner: {:?} }}", slice[4..].iter()) |
| ); |
| |
| assert_eq!(iter.next(), Some(Err(Utf8(FirstByte(ContinuationByte))))); |
| assert_eq!(iter.into_inner().next(), Some(&b'\xcc')); |
| } |
| |
| #[test] fn utf8chardecoder() { |
| let slice = b"\xf4\xbf\x80\x80XY\xcc\xbbZ_"; |
| let mut iter = slice.utf8char_indices(); |
| assert_eq!(iter.size_hint(), (2, Some(10))); |
| assert_eq!( |
| format!("{:?}", &iter), |
| format!("Utf8CharDecoder {{ bytes[0..]: {:?} }}", &slice) |
| ); |
| |
| assert_eq!(iter.next(), Some((0, Err(Codepoint(TooHigh)), 1))); |
| assert_eq!( |
| format!("{:?}", &iter), |
| format!("Utf8CharDecoder {{ bytes[1..]: {:?} }}", &slice[1..]) |
| ); |
| assert_eq!(iter.size_hint(), (2, Some(9))); |
| assert_eq!(iter.count(), 8); |
| } |
| |
| #[test] fn utf16charmerger() { |
| let slice = [0xd800, 'x' as u16, 0xd900, 0xdfff, 'λ' as u16]; |
| let mut iter = slice.iter().to_utf16chars(); |
| assert_eq!(iter.size_hint(), (2, Some(5))); |
| assert_eq!(format!("{:?}", &iter), |
| format!("Utf16CharMerger {{ buffered: None, inner: {:?} }}", slice.iter())); |
| |
| assert_eq!(iter.next(), Some(Err(UnmatchedLeadingSurrogate))); |
| assert_eq!(iter.size_hint(), (1, Some(4))); |
| assert_eq!( |
| format!("{:?}", &iter), |
| format!("Utf16CharMerger {{ buffered: Some(120), inner: {:?} }}", slice[2..].iter()) |
| ); |
| |
| assert_eq!(iter.into_inner().next(), Some(&0xd900)); |
| } |
| |
| #[test] fn utf16chardecoder() { |
| let slice = [0xd800, 'x' as u16, 0xd900, 0xdfff, 'λ' as u16]; |
| let mut iter = slice.utf16char_indices(); |
| assert_eq!(iter.size_hint(), (2, Some(5))); |
| assert_eq!( |
| format!("{:?}", &iter), |
| format!("Utf16CharDecoder {{ units[0..]: {:?} }}", &slice) |
| ); |
| |
| assert_eq!(iter.next(), Some((0, Err(UnmatchedLeadingSurrogate), 1))); |
| assert_eq!( |
| format!("{:?}", &iter), |
| format!("Utf16CharDecoder {{ units[1..]: {:?} }}", &slice[1..]) |
| ); |
| assert_eq!(iter.size_hint(), (2, Some(4))); |
| assert_eq!(iter.count(), 3); |
| } |
| |
| |
| |
| /// Tests for ensuring that iterators which also implement Read support |
| /// interleaving calls of `read()` and `next()`, and that they implement Read |
| /// correctly (support any buffer size at any time). |
| |
| #[test] fn read_single_ascii() { |
| let uc = 'a'.to_utf8(); |
| assert_eq!(uc.len(), 1); |
| for chunk in 1..5 { |
| let mut buf = [b'E'; 6]; |
| let mut iter = uc.into_iter(); |
| let mut written = 0; |
| for _ in 0..4 { |
| assert_eq!(iter.read(&mut buf[..0]).unwrap(), 0); |
| let wrote = iter.read(&mut buf[written..written+chunk]).unwrap(); |
| assert_eq!(wrote, min(1-written, chunk)); |
| written += wrote; |
| for &b in &buf[written..] {assert_eq!(b, b'E');} |
| assert_eq!(buf[..written], AsRef::<[u8]>::as_ref(&uc)[..written]); |
| } |
| assert_eq!(written, 1); |
| } |
| } |
| |
| #[test] fn read_single_nonascii() { |
| let uc = 'ä'.to_utf8(); |
| assert_eq!(uc.len(), 2); |
| for chunk in 1..5 { |
| let mut buf = [b'E'; 6]; |
| let mut iter = uc.into_iter(); |
| let mut written = 0; |
| for _ in 0..4 { |
| assert_eq!(iter.read(&mut buf[..0]).unwrap(), 0); |
| let wrote = iter.read(&mut buf[written..written+chunk]).unwrap(); |
| assert_eq!(wrote, min(2-written, chunk)); |
| written += wrote; |
| for &b in &buf[written..] {assert_eq!(b, b'E');} |
| assert_eq!(buf[..written], AsRef::<[u8]>::as_ref(&uc)[..written]); |
| } |
| assert_eq!(written, 2); |
| } |
| } |
| |
| |
| #[test] fn utf8charsplitter_read_all_sizes() { |
| let s = "1111\u{104444}\u{222}1\u{833}1111\u{100004}"; |
| assert!(s.len()%3 == 1); |
| let mut buf = vec![b'E'; s.len()+6]; |
| for size in 2..6 {//s.len()+4 { |
| let mut reader = Utf8CharSplitter::from(s.chars().map(|c| c.to_utf8() )); |
| for (offset, part) in s.as_bytes().chunks(size).enumerate() { |
| let read_to = if part.len() == size {(offset+1)*size} else {buf.len()}; |
| assert_eq!(reader.read(&mut buf[offset*size..read_to]).unwrap(), part.len()); |
| assert_eq!(&buf[..offset*size+part.len()], &s.as_bytes()[..offset*size+part.len()]); |
| } |
| assert_eq!(reader.read(&mut buf[..]).unwrap(), 0); |
| assert!(buf[s.len()..].iter().all(|&b| b==b'E' )); |
| } |
| } |
| |
| #[test] fn utf8charsplitter_alternate_iter_read() { |
| let s = "1111\u{104444}\u{222}1\u{833}1111\u{100004}"; |
| let mut buf = [b'0'; 10]; |
| for n in 0..2 { |
| // need to collect to test size_hint() |
| // because chars().size_hint() returns ((bytes+3)/4, Some(bytes)) |
| let u8chars = s.chars().map(|c| c.to_utf8() ).collect::<Vec<_>>(); |
| let mut iter: Utf8CharSplitter<_,_> = u8chars.into_iter().into(); |
| for (i, byte) in s.bytes().enumerate() { |
| let until_next = s.as_bytes()[i..].iter().take_while(|&b| (b>>6)==0b10u8 ).count(); |
| let remaining_chars = s[i+until_next..].chars().count(); |
| println!("{}. run: byte {:02} of {}, remaining: {:02}+{}: 0b{:08b} = {:?}", |
| n, i, s.len(), remaining_chars, until_next, byte, byte as char); |
| assert_eq!(iter.read(&mut[][..]).unwrap(), 0); |
| if i % 2 == n { |
| assert_eq!(iter.next(), Some(byte)); |
| } else { |
| assert_eq!(iter.read(&mut buf[..1]).unwrap(), 1); |
| assert_eq!(buf[0], byte); |
| } |
| } |
| assert_eq!(iter.size_hint(), (0, Some(0))); |
| assert_eq!(iter.next(), None); |
| assert_eq!(iter.read(&mut buf[..]).unwrap(), 0); |
| } |
| } |
