test: Add test for unlimited tool listing (issue #100)

tests/issues/test_100_tool_listing.py

@@ -0,0 +1,27 @@
+import pytest
+from mcp.server.fastmcp import FastMCP
+
+pytestmark = pytest.mark.anyio
+
+async def test_list_tools_returns_all_tools():
+    mcp = FastMCP("TestTools")
+    
+    # Create 100 tools with unique names
+    num_tools = 100
+    for i in range(num_tools):
+        @mcp.tool(name=f"tool_{i}")
+        def dummy_tool_func():
+            f"""Tool number {i}"""
+            return i
+        globals()[f'dummy_tool_{i}'] = dummy_tool_func  # Keep reference to avoid garbage collection
+    
+    # Get all tools
+    tools = await mcp.list_tools()
+    
+    # Verify we get all tools
+    assert len(tools) == num_tools, f"Expected {num_tools} tools, but got {len(tools)}"
+    
+    # Verify each tool is unique and has the correct name
+    tool_names = [tool.name for tool in tools]
+    expected_names = [f"tool_{i}" for i in range(num_tools)]
+    assert sorted(tool_names) == sorted(expected_names), "Tool names don't match expected names"