feat: add PageIndex SDK with local/cloud dual-mode support (#207)

tests/test_markdown_parser.py

@@ -0,0 +1,55 @@
+import pytest
+from pathlib import Path
+from pageindex.parser.markdown import MarkdownParser
+from pageindex.parser.protocol import ContentNode, ParsedDocument
+
+@pytest.fixture
+def sample_md(tmp_path):
+    md = tmp_path / "test.md"
+    md.write_text("""# Chapter 1
+Some intro text.
+
+## Section 1.1
+Details here.
+
+## Section 1.2
+More details.
+
+# Chapter 2
+Another chapter.
+""")
+    return str(md)
+
+def test_supported_extensions():
+    parser = MarkdownParser()
+    exts = parser.supported_extensions()
+    assert ".md" in exts
+    assert ".markdown" in exts
+
+def test_parse_returns_parsed_document(sample_md):
+    parser = MarkdownParser()
+    result = parser.parse(sample_md)
+    assert isinstance(result, ParsedDocument)
+    assert result.doc_name == "test"
+
+def test_parse_nodes_have_level(sample_md):
+    parser = MarkdownParser()
+    result = parser.parse(sample_md)
+    assert len(result.nodes) == 4
+    assert result.nodes[0].level == 1
+    assert result.nodes[0].title == "Chapter 1"
+    assert result.nodes[1].level == 2
+    assert result.nodes[1].title == "Section 1.1"
+    assert result.nodes[3].level == 1
+
+def test_parse_nodes_have_content(sample_md):
+    parser = MarkdownParser()
+    result = parser.parse(sample_md)
+    assert "Some intro text" in result.nodes[0].content
+    assert "Details here" in result.nodes[1].content
+
+def test_parse_nodes_have_index(sample_md):
+    parser = MarkdownParser()
+    result = parser.parse(sample_md)
+    for node in result.nodes:
+        assert node.index is not None