1 files changed, 33 insertions, 0 deletions
diff --git a/tests/test_server.py b/tests/test_server.py
new file mode 100644
index 0000000..533c88b
--- /dev/null
+++ b/tests/test_server.py
@@ -0,0 +1,33 @@
+"""Tests for MCP server compose_mml tool."""
+
+from mml_composemusic_mcp.server import compose_mml
+
+PPMCK_MML = """#TITLE "Test"
+A t120 l4 o4 v15 q2
+  c e g c
+"""
+
+
+def test_compose_ppmck():
+    result = compose_mml(action="compose", mml=PPMCK_MML, mode="ppmck")
+    assert result["success"] is True
+    assert result["wav_path"] is not None
+    assert result["duration_sec"] > 0
+
+
+def test_validate_ppmck():
+    result = compose_mml(action="validate", mml=PPMCK_MML, mode="ppmck")
+    assert result["valid"] is True
+    assert result["channel_summary"]
+
+
+def test_template():
+    result = compose_mml(action="template", mode="pyxel", template="basic")
+    assert "mml" in result
+    assert "0:" in result["mml"]
+
+
+def test_compose_error():
+    result = compose_mml(action="compose", mml="A t0\n  c", mode="ppmck")
+    assert result["success"] is False
+    assert any(e["severity"] == "error" for e in result["validation"]["errors"])