From: Tilman Sauerbeck <tilman@code-monkey.de>
Date: Sat, 11 Jan 2020 13:18:53 +0000 (+0100)
Subject: test: Verify Logger::list_recordings()'s behavior with empty storage.
X-Git-Url: http://git.code-monkey.de/?a=commitdiff_plain;h=4b82362597c3908db091615b403663b8f39b67fa;p=gps-watch.git

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

We expect no output in that case.
---

diff --git a/test/logger_test.rs b/test/logger_test.rs
index 2bb507f..bbf8dd5 100644
--- a/test/logger_test.rs
+++ b/test/logger_test.rs
@@ -351,6 +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]