tests: add tests from pr 50

tests/simple.rs

@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::{fs, path::PathBuf};
 
 #[test]
 fn version_list() {
@@ -30,14 +30,60 @@ fn version_cat() {
 fn extract_to_tempdir() {
     // see https://github.com/muja/unrar.rs/issues/34
     let file = "data/version.rar".to_owned();
-    let mut archive = unrar::Archive::new(&file).open_for_processing().expect("open archive");
+    let mut archive = unrar::Archive::new(&file)
+        .open_for_processing()
+        .expect("open archive");
     let temp_path = tempfile::tempdir().expect("creating tempdir");
     let temp_path = temp_path.path();
     while let Some(header) = archive.read_header().expect("read header") {
         let temp_file_path = temp_path.join(header.entry().filename.as_path());
-        archive = header.extract_to(temp_file_path.as_path()).expect("extract_to");
+        archive = header
+            .extract_to(temp_file_path.as_path())
+            .expect("extract_to");
     }
-    let entries = std::fs::read_dir(&temp_path).expect("read tempdir").collect::<Result<Vec<_>, _>>().unwrap();
+    let entries = std::fs::read_dir(&temp_path)
+        .expect("read tempdir")
+        .collect::<Result<Vec<_>, _>>()
+        .unwrap();
     assert!(entries.len() == 1);
     assert!(entries[0].file_name() == "VERSION");
 }
+
+#[test]
+fn version_extract_to_absolute_path() {
+    let archive = unrar::Archive::new("data/version.rar")
+        .open_for_processing()
+        .unwrap();
+
+    let tmp_dir = tempfile::tempdir().unwrap();
+
+    let header = archive.read_header().unwrap().unwrap();
+    let filename = header.entry().filename.clone();
+    header.extract_to(tmp_dir.path().join(filename)).unwrap();
+
+    assert_eq!(
+        fs::read_to_string(tmp_dir.path().join("VERSION")).unwrap(),
+        "unrar-0.4.0"
+    );
+}
+
+#[test]
+fn version_extract_to_relative_path() {
+    let archive = unrar::Archive::new("data/version.rar")
+        .open_for_processing()
+        .unwrap();
+
+    let tmp_dir = tempfile::tempdir().unwrap();
+
+    let header = archive.read_header().unwrap().unwrap();
+    let cwd = std::env::current_dir().unwrap();
+    std::env::set_current_dir(&tmp_dir).unwrap();
+    let e = header.extract_to("some-folder/VERSION");
+    std::env::set_current_dir(&cwd).unwrap();
+    assert!(e.is_ok());
+
+    assert_eq!(
+        fs::read_to_string(tmp_dir.path().join("some-folder/VERSION")).unwrap(),
+        "unrar-0.4.0"
+    );
+}