Add end-to-end test

tests/end_to_end.rs

@@ -0,0 +1,56 @@
+extern crate zip;
+
+use std::io::prelude::*;
+use zip::write::FileOptions;
+use std::io::Cursor;
+
+// This test asserts that after creating a zip file, then reading its contents back out,
+// the extracted data will *always* be exactly the same as the original data.
+#[test]
+fn main() -> zip::result::ZipResult<()> {
+    let buf: &mut Vec<u8> = &mut Vec::new();
+    let mut file = Cursor::new(buf);
+
+    write_to_zip_file(&mut file)?;
+
+    let file_contents: String = read_zip_file(file).unwrap();
+
+    assert!(file_contents.as_bytes() == LOREM_IPSUM);
+
+    Ok(())
+}
+
+fn write_to_zip_file(file: &mut Cursor<&mut Vec<u8>>) -> zip::result::ZipResult<()> {
+    let mut zip = zip::ZipWriter::new(file);
+
+    zip.add_directory("test/", FileOptions::default())?;
+
+    let options = FileOptions::default()
+        .compression_method(zip::CompressionMethod::Stored)
+        .unix_permissions(0o755);
+    zip.start_file("test/☃.txt", options)?;
+    zip.write_all(b"Hello, World!\n")?;
+
+    zip.start_file("test/lorem_ipsum.txt", FileOptions::default())?;
+    zip.write_all(LOREM_IPSUM)?;
+
+    zip.finish()?;
+    Ok(())
+}
+
+fn read_zip_file(zip_file: Cursor<&mut Vec<u8>>) -> zip::result::ZipResult<String> {
+    let mut archive = zip::ZipArchive::new(zip_file).unwrap();
+
+    let mut file = archive.by_name("test/lorem_ipsum.txt")?;
+
+    let mut contents = String::new();
+    file.read_to_string(&mut contents).unwrap();
+    Ok(contents)
+}
+
+const LOREM_IPSUM : &'static [u8] = b"Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tellus elit, tristique vitae mattis egestas, ultricies vitae risus. Quisque sit amet quam ut urna aliquet
+molestie. Proin blandit ornare dui, a tempor nisl accumsan in. Praesent a consequat felis. Morbi metus diam, auctor in auctor vel, feugiat id odio. Curabitur ex ex,
+dictum quis auctor quis, suscipit id lorem. Aliquam vestibulum dolor nec enim vehicula, porta tristique augue tincidunt. Vivamus ut gravida est. Sed pellentesque, dolor
+vitae tristique consectetur, neque lectus pulvinar dui, sed feugiat purus diam id lectus. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per
+inceptos himenaeos. Maecenas feugiat velit in ex ultrices scelerisque id id neque.
+";