- let mut rw = OO::new(); rw.write(true).read(true);
-
- match r.open(&tmpdir.join("a")) {
- Ok(..) => panic!(), Err(..) => {}
- }
-
- // Perform each one twice to make sure that it succeeds the second time
- // (where the file exists)
- check!(c(&w).create(true).open(&tmpdir.join("b")));
- assert!(tmpdir.join("b").exists());
- check!(c(&w).create(true).open(&tmpdir.join("b")));
- check!(w.open(&tmpdir.join("b")));
-
+ let mut rw = OO::new(); rw.read(true).write(true);
+ let mut a = OO::new(); a.append(true);
+ let mut ra = OO::new(); ra.read(true).append(true);
+
+ let invalid_options = if cfg!(windows) { "The parameter is incorrect" }
+ else { "Invalid argument" };
+
+ // Test various combinations of creation modes and access modes.
+ //
+ // Allowed:
+ // creation mode | read | write | read-write | append | read-append |
+ // :-----------------------|:-----:|:-----:|:----------:|:------:|:-----------:|
+ // not set (open existing) | X | X | X | X | X |
+ // create | | X | X | X | X |
+ // truncate | | X | X | | |
+ // create and truncate | | X | X | | |
+ // create_new | | X | X | X | X |
+ //
+ // tested in reverse order, so 'create_new' creates the file, and 'open existing' opens it.
+
+ // write-only
+ check!(c(&w).create_new(true).open(&tmpdir.join("a")));
+ check!(c(&w).create(true).truncate(true).open(&tmpdir.join("a")));
+ check!(c(&w).truncate(true).open(&tmpdir.join("a")));
+ check!(c(&w).create(true).open(&tmpdir.join("a")));
+ check!(c(&w).open(&tmpdir.join("a")));
+
+ // read-only
+ error!(c(&r).create_new(true).open(&tmpdir.join("b")), invalid_options);
+ error!(c(&r).create(true).truncate(true).open(&tmpdir.join("b")), invalid_options);
+ error!(c(&r).truncate(true).open(&tmpdir.join("b")), invalid_options);
+ error!(c(&r).create(true).open(&tmpdir.join("b")), invalid_options);
+ check!(c(&r).open(&tmpdir.join("a"))); // try opening the file created with write_only
+
+ // read-write
+ check!(c(&rw).create_new(true).open(&tmpdir.join("c")));
+ check!(c(&rw).create(true).truncate(true).open(&tmpdir.join("c")));
+ check!(c(&rw).truncate(true).open(&tmpdir.join("c")));