1 files changed, 69 insertions, 0 deletions
diff --git a/pocketbook/tests/test_note.py b/pocketbook/tests/test_note.py
new file mode 100644
index 0000000..539451a
--- /dev/null
+++ b/pocketbook/tests/test_note.py
@@ -0,0 +1,69 @@
+from pocketbook.note import Note
+
+
+class TestNoteSerialisation:
+    def test_round_trip(self):
+        note = Note(title="Shopping", body="Milk\nEggs\nBread")
+        content = note.to_file_content()
+        restored = Note.from_file_content(content)
+        assert restored.title == note.title
+        assert restored.body == note.body
+
+    def test_empty_body(self):
+        note = Note(title="Empty", body="")
+        content = note.to_file_content()
+        restored = Note.from_file_content(content)
+        assert restored.title == "Empty"
+        assert restored.body == ""
+
+    def test_empty_title(self):
+        note = Note(title="", body="some body")
+        content = note.to_file_content()
+        restored = Note.from_file_content(content)
+        assert restored.title == ""
+        assert restored.body == "some body"
+
+    def test_unicode(self):
+        note = Note(title="日本語タイトル", body="Ünïcödé bödý 🎉")
+        content = note.to_file_content()
+        restored = Note.from_file_content(content)
+        assert restored.title == "日本語タイトル"
+        assert restored.body == "Ünïcödé bödý 🎉"
+
+    def test_multiline_body(self):
+        body = "Line 1\nLine 2\n\nLine 4\n"
+        note = Note(title="Multi", body=body)
+        content = note.to_file_content()
+        restored = Note.from_file_content(content)
+        assert restored.body == body
+
+    def test_file_content_format(self):
+        """Title on line 1, blank line, then body."""
+        note = Note(title="Title", body="Body text")
+        content = note.to_file_content()
+        assert content == "Title\n\nBody text"
+
+    def test_from_file_content_no_blank_line(self):
+        """Gracefully handle files without a blank separator."""
+        restored = Note.from_file_content("JustTitle")
+        assert restored.title == "JustTitle"
+        assert restored.body == ""
+
+
+class TestNoteFilename:
+    def test_generate_filename(self):
+        note = Note(title="Test", body="")
+        filename = note.generate_filename(order=1)
+        assert filename.startswith("0001-")
+        assert filename.endswith(".txt")
+        # Format: 0001-YYYYMMDD-HHMMSS-shortid.txt
+        parts = filename.split("-")
+        assert len(parts) == 4
+        assert len(parts[0]) == 4  # order
+        assert len(parts[1]) == 8  # date
+        # parts[2] = HHMMSS + shortid.txt combined via split on -
+        # Actually: 0001-20260225-143012-abc12.txt has 4 parts
+
+    def test_parse_order_from_filename(self):
+        assert Note.parse_order("0005-20260101-120000-abc12.txt") == 5
+        assert Note.parse_order("0001-20260101-120000-xyz99.txt") == 1