Move tests to repository root and update pytest configuration

- Move tests from src/gitea_mcp_remote/tests/ to tests/ (top-level)
- Update pytest.ini to point to new test location
- All imports already use absolute paths (gitea_mcp_remote.*)
- Tests run successfully from new location (28/30 pass, 2 pre-existing failures)

This improves project structure by following standard Python conventions
where tests live at the repository root level rather than inside the
source package.

Closes #21

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/test_config.py

@@ -0,0 +1,211 @@
+"""Tests for configuration loader module."""
+
+import os
+from pathlib import Path
+
+import pytest
+from pydantic import ValidationError
+
+from gitea_mcp_remote.config import GiteaSettings, load_settings
+
+
+class TestGiteaSettings:
+    """Test GiteaSettings configuration class."""
+
+    def test_required_fields(self):
+        """Test that required fields are enforced."""
+        with pytest.raises(ValidationError) as exc_info:
+            GiteaSettings()
+
+        errors = exc_info.value.errors()
+        # Note: gitea_repo is optional (for PMO mode)
+        required_fields = {"gitea_url", "gitea_token", "gitea_owner"}
+        error_fields = {error["loc"][0] for error in errors}
+        assert required_fields.issubset(error_fields)
+
+    def test_valid_configuration(self):
+        """Test valid configuration creation."""
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="test_token",
+            gitea_owner="test_owner",
+            gitea_repo="test_repo",
+        )
+
+        assert settings.gitea_url == "https://gitea.example.com"
+        assert settings.gitea_token == "test_token"
+        assert settings.gitea_owner == "test_owner"
+        assert settings.gitea_repo == "test_repo"
+        assert settings.http_host == "127.0.0.1"
+        assert settings.http_port == 8000
+        assert settings.auth_token is None
+
+    def test_gitea_url_validation(self):
+        """Test Gitea URL validation."""
+        # Valid URLs
+        valid_urls = [
+            "http://gitea.local",
+            "https://gitea.example.com",
+            "http://192.168.1.1:3000",
+        ]
+
+        for url in valid_urls:
+            settings = GiteaSettings(
+                gitea_url=url,
+                gitea_token="token",
+                gitea_owner="owner",
+                gitea_repo="repo",
+            )
+            assert settings.gitea_url == url.rstrip("/")
+
+        # Invalid URL (no protocol)
+        with pytest.raises(ValidationError) as exc_info:
+            GiteaSettings(
+                gitea_url="gitea.example.com",
+                gitea_token="token",
+                gitea_owner="owner",
+                gitea_repo="repo",
+            )
+        assert "must start with http://" in str(exc_info.value)
+
+    def test_gitea_url_trailing_slash_removed(self):
+        """Test that trailing slashes are removed from Gitea URL."""
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com/",
+            gitea_token="token",
+            gitea_owner="owner",
+            gitea_repo="repo",
+        )
+        assert settings.gitea_url == "https://gitea.example.com"
+
+    def test_http_port_validation(self):
+        """Test HTTP port validation."""
+        # Valid port
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="token",
+            gitea_owner="owner",
+            gitea_repo="repo",
+            http_port=9000,
+        )
+        assert settings.http_port == 9000
+
+        # Invalid port (too high)
+        with pytest.raises(ValidationError):
+            GiteaSettings(
+                gitea_url="https://gitea.example.com",
+                gitea_token="token",
+                gitea_owner="owner",
+                gitea_repo="repo",
+                http_port=70000,
+            )
+
+        # Invalid port (too low)
+        with pytest.raises(ValidationError):
+            GiteaSettings(
+                gitea_url="https://gitea.example.com",
+                gitea_token="token",
+                gitea_owner="owner",
+                gitea_repo="repo",
+                http_port=0,
+            )
+
+    def test_enabled_tools_list_parsing(self):
+        """Test enabled_tools string parsing to list."""
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="token",
+            gitea_owner="owner",
+            gitea_repo="repo",
+            enabled_tools="tool1,tool2,tool3",
+        )
+        assert settings.enabled_tools_list == ["tool1", "tool2", "tool3"]
+
+        # Test with spaces
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="token",
+            gitea_owner="owner",
+            gitea_repo="repo",
+            enabled_tools="tool1, tool2 , tool3",
+        )
+        assert settings.enabled_tools_list == ["tool1", "tool2", "tool3"]
+
+        # Test empty string
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="token",
+            gitea_owner="owner",
+            gitea_repo="repo",
+            enabled_tools="",
+        )
+        assert settings.enabled_tools_list is None
+
+    def test_disabled_tools_list_parsing(self):
+        """Test disabled_tools string parsing to list."""
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="token",
+            gitea_owner="owner",
+            gitea_repo="repo",
+            disabled_tools="tool1,tool2",
+        )
+        assert settings.disabled_tools_list == ["tool1", "tool2"]
+
+    def test_get_gitea_mcp_env(self):
+        """Test environment variable generation for wrapped MCP server."""
+        settings = GiteaSettings(
+            gitea_url="https://gitea.example.com",
+            gitea_token="test_token",
+            gitea_owner="test_owner",
+            gitea_repo="test_repo",
+        )
+
+        env = settings.get_gitea_mcp_env()
+
+        assert env["GITEA_BASE_URL"] == "https://gitea.example.com"
+        assert env["GITEA_API_TOKEN"] == "test_token"
+        assert env["GITEA_DEFAULT_OWNER"] == "test_owner"
+        assert env["GITEA_DEFAULT_REPO"] == "test_repo"
+
+
+class TestLoadSettings:
+    """Test load_settings factory function."""
+
+    def test_load_from_env_file(self, tmp_path):
+        """Test loading settings from a .env file."""
+        env_file = tmp_path / ".env"
+        env_file.write_text(
+            """
+GITEA_URL=https://gitea.test.com
+GITEA_TOKEN=test_token_123
+GITEA_OWNER=test_owner
+GITEA_REPO=test_repo
+HTTP_PORT=9000
+            """
+        )
+
+        settings = load_settings(env_file)
+
+        assert settings.gitea_url == "https://gitea.test.com"
+        assert settings.gitea_token == "test_token_123"
+        assert settings.gitea_owner == "test_owner"
+        assert settings.gitea_repo == "test_repo"
+        assert settings.http_port == 9000
+
+    def test_load_from_environment(self, monkeypatch):
+        """Test loading settings from environment variables."""
+        monkeypatch.setenv("GITEA_URL", "https://env.gitea.com")
+        monkeypatch.setenv("GITEA_TOKEN", "env_token")
+        monkeypatch.setenv("GITEA_OWNER", "env_owner")
+        monkeypatch.setenv("GITEA_REPO", "env_repo")
+        monkeypatch.setenv("HTTP_PORT", "8080")
+
+        # Mock _env_file to prevent loading actual .env
+        settings = GiteaSettings()
+
+        assert settings.gitea_url == "https://env.gitea.com"
+        assert settings.gitea_token == "env_token"
+        assert settings.gitea_owner == "env_owner"
+        assert settings.gitea_repo == "env_repo"
+        assert settings.http_port == 8080