Add MCP server code

tests/test_get_table_of_contents.py

@@ -0,0 +1,39 @@
+from pdf_mcp.server import get_table_of_contents
+
+
+class TestGetTableOfContents:
+    def test_basic_toc(self, basic_pdf):
+        toc = get_table_of_contents(basic_pdf)
+        assert len(toc) == 3
+        assert toc[0] == {"level": 1, "title": "Chapter 1", "page": 1}
+        assert toc[1] == {"level": 1, "title": "Chapter 2", "page": 2}
+        assert toc[2] == {"level": 1, "title": "Chapter 3", "page": 3}
+
+    def test_nested_toc_entries(self, nested_toc_pdf):
+        toc = get_table_of_contents(nested_toc_pdf)
+        assert len(toc) == 9
+
+    def test_nested_toc_levels(self, nested_toc_pdf):
+        toc = get_table_of_contents(nested_toc_pdf)
+        levels = [e["level"] for e in toc]
+        assert levels == [1, 1, 2, 2, 3, 3, 1, 2, 2]
+
+    def test_nested_toc_titles(self, nested_toc_pdf):
+        toc = get_table_of_contents(nested_toc_pdf)
+        titles = [e["title"] for e in toc]
+        assert "Introduction" in titles
+        assert "Database Layer" in titles
+        assert "Kubernetes" in titles
+
+    def test_nested_toc_page_numbers(self, nested_toc_pdf):
+        toc = get_table_of_contents(nested_toc_pdf)
+        pages = [e["page"] for e in toc]
+        assert pages == list(range(1, 10))
+
+    def test_no_toc(self, search_pdf):
+        toc = get_table_of_contents(search_pdf)
+        assert toc == []
+
+    def test_no_toc_diagrams(self, diagrams_pdf):
+        toc = get_table_of_contents(diagrams_pdf)
+        assert toc == []