1 files changed, 79 insertions, 0 deletions
diff --git a/rust/tests/binary_writer.rs b/rust/tests/binary_writer.rs
new file mode 100644
index 00000000..bc9c2165
--- /dev/null
+++ b/rust/tests/binary_writer.rs
@@ -0,0 +1,79 @@
+use binaryninja::binary_reader::BinaryReader;
+use binaryninja::binary_view::BinaryViewBase;
+use binaryninja::binary_writer::BinaryWriter;
+use binaryninja::headless::Session;
+use rstest::*;
+use std::io::{Read, Seek, SeekFrom, Write};
+use std::path::PathBuf;
+
+#[fixture]
+#[once]
+fn session() -> Session {
+    Session::new().expect("Failed to initialize session")
+}
+
+#[rstest]
+fn test_binary_writer_seek(_session: &Session) {
+    let out_dir = env!("OUT_DIR").parse::<PathBuf>().unwrap();
+    let view = binaryninja::load(out_dir.join("atox.obj")).expect("Failed to create view");
+    let mut writer = BinaryWriter::new(&view);
+    let end_offset = view.len();
+
+    // Test seeking to a specific position
+    writer
+        .seek(SeekFrom::Start(0))
+        .expect("Failed to seek to start");
+    assert_eq!(writer.offset(), 0, "Writer failed to seek to the start");
+
+    writer
+        .seek(SeekFrom::End(0))
+        .expect("Failed to seek to end");
+    assert_eq!(
+        writer.offset(),
+        end_offset,
+        "Writer failed to seek to the end"
+    );
+
+    // Test relative seeking
+    writer
+        .seek(SeekFrom::Start(10))
+        .expect("Failed to seek to position 10");
+    assert_eq!(writer.offset(), 10, "Writer failed to seek to position 10");
+
+    writer
+        .seek(SeekFrom::Current(-5))
+        .expect("Failed to perform relative seek");
+    assert_eq!(
+        writer.offset(),
+        5,
+        "Writer failed to perform relative seek correctly"
+    );
+}
+
+#[rstest]
+fn test_binary_writer_write(_session: &Session) {
+    let out_dir = env!("OUT_DIR").parse::<PathBuf>().unwrap();
+    let view = binaryninja::load(out_dir.join("atox.obj")).expect("Failed to create view");
+    let mut reader = BinaryReader::new(&view);
+    let mut writer = BinaryWriter::new(&view);
+
+    // Validate bytes are written.
+    let mut buffer = [5u8; 4];
+    let mut verify_buffer = [0u8; 4];
+    writer.write(&mut buffer).expect("Failed to write 4 bytes");
+    reader
+        .read_exact(&mut verify_buffer)
+        .expect("Failed to read 4 bytes");
+    assert_eq!(buffer, verify_buffer, "Failed to write the correct bytes");
+
+    // Test attempting to write beyond the end of the file.
+    writer
+        .seek(SeekFrom::End(0))
+        .expect("Failed to seek to end");
+    let mut eof_buffer = [0u8; 1];
+    let result = writer.write(&mut eof_buffer);
+    assert!(
+        result.is_err(),
+        "Expected an error when writing past EOF, got success instead"
+    );
+}