test: Verify Logger::list_recordings()'s behavior with empty storage.

[gps-watch.git] / test / logger_test.rs

diff --git a/test/logger_test.rs b/test/logger_test.rs
index 93568bb3f85ea00f7fe7bbfd4b032d448bbd27b0..bbf8dd56b2254448275e030b613b5d49b932a86d 100644 (file)
--- a/test/logger_test.rs
+++ b/test/logger_test.rs
@@ -80,10 +80,12 @@ impl Pipe {
 
         unsafe {
             extern {
-                fn pipe(pipefd: *mut i32) -> i32;
+                fn pipe2(pipefd: *mut i32, flags: i32) -> i32;
             }
 
-            pipe(pipe_fd.as_mut_ptr());
+            const O_NONBLOCK : i32 = 0x800;
+
+            pipe2(pipe_fd.as_mut_ptr(), O_NONBLOCK);
         }
 
         Pipe {
@@ -349,6 +351,39 @@ fn get_recording_valid() {
     assert!(logger.get_recording(1, &mut yenc_buffer).is_ok());
 }
 
+// Verifies that Logger::list_recordings() shows an empty listing
+// if there are no recordings.
+#[test]
+fn list_recordings0() {
+    let pipe = Pipe::new();
+
+    let mut file = unsafe { std::fs::File::from_raw_fd(pipe.write_fd()) };
+
+    let mut ls_buffer_space = [0u8; 4096];
+    let mut ls_buffer = Buffer::alloc();
+
+    let user_data = (&mut file as *mut std::fs::File) as *mut BufferUserData;
+
+    ls_buffer.init(ls_buffer_space.as_mut_ptr(),
+                   ls_buffer_space.len(),
+                   flush_write_buffer,
+                   user_data);
+
+    let mut fake_storage = FakeStorage::new();
+
+    let mut logger = Logger::new(&mut fake_storage);
+    logger.init();
+
+    logger.list_recordings(&mut ls_buffer);
+
+    let mut file = unsafe { std::fs::File::from_raw_fd(pipe.read_fd()) };
+
+    let mut listing_raw = [0u8; 256];
+
+    // There are no recordings, so there's no data in the pipe either.
+    assert!(file.read(&mut listing_raw).is_err());
+}
+
 // Verifies that Logger::list_recordings() shows a listing
 // of a single recording in the very first sector.
 #[test]