1 files changed, 9 insertions, 6 deletions
diff --git a/test/test_write.py b/test/test_write.py
index f339799..4929b06 100644
--- a/test/test_write.py
+++ b/test/test_write.py
@@ -1,6 +1,8 @@
 import io
 import csv
-from obfuscator.write import create_byte_stream
+from obfuscator.write import DataWriter
+
+writer = DataWriter()
 
 
 def csv_bytes_to_list(csv_bytes: bytes):
@@ -15,13 +17,14 @@ def test_create_byte_stream_valid_data():
         {"student_id": "1234", "name": "Student 1", "course": "Course 1"},
         {"student_id": "5678", "name": "Student 2", "course": "Course 2"},
     ]
-    csv_bytes = create_byte_stream(data)
+    csv_bytes = writer.create_byte_stream(data)
     result = csv_bytes_to_list(csv_bytes)
     assert result == data
 
 
 def test_create_byte_stream_empty_data():
-    csv_bytes = create_byte_stream([])
+    data = []
+    csv_bytes = writer.create_byte_stream(data)
     assert csv_bytes == b""
 
 
@@ -30,7 +33,7 @@ def test_create_byte_stream_handles_quoted_fields():
         {"student_id": "1234", "name": 'Student "One"', "course": "Course, A"},
         {"student_id": "5678", "name": 'Student "Two"', "course": "Course, B"},
     ]
-    csv_bytes = create_byte_stream(data)
+    csv_bytes = writer.create_byte_stream(data)
     result = csv_bytes_to_list(csv_bytes)
     assert result == data
 
@@ -40,7 +43,7 @@ def test_create_byte_stream_consistent_header_order():
         {"student_id": "1234", "name": "Alice", "course": "Math"},
         {"student_id": "5678", "name": "Bob", "course": "Science"},
     ]
-    csv_bytes = create_byte_stream(data)
+    csv_bytes = writer.create_byte_stream(data)
     csv_string = csv_bytes.decode("utf-8")
     header_line = csv_string.splitlines()[0]
     expected_header = ",".join(data[0].keys())
@@ -52,6 +55,6 @@ def test_create_byte_stream_special_characters():
         {"student_id": "1234", "name": "Student 1", "course": "Line1\nLine2"},
         {"student_id": "5678", "name": "Student 2", "course": "Value with, comma"},
     ]
-    csv_bytes = create_byte_stream(data)
+    csv_bytes = writer.create_byte_stream(data)
     result = csv_bytes_to_list(csv_bytes)
     assert result == data