Add test files

app/tests/test_template.py

@@ -0,0 +1,63 @@
+"""Tests for template module."""
+
+import pytest
+from pathlib import Path
+
+
+class TestTemplateManager:
+    """Test cases for template management."""
+
+    def test_list_builtin_templates(self):
+        """Test listing built-in templates."""
+        from env_pro.core.template import TemplateManager
+
+        manager = TemplateManager()
+        templates = manager.list_templates()
+
+        template_names = [t["name"] for t in templates]
+        assert "fastapi" in template_names
+        assert "django" in template_names
+        assert "nodejs" in template_names
+
+    def test_get_builtin_template(self):
+        """Test getting a built-in template."""
+        from env_pro.core.template import TemplateManager
+
+        manager = TemplateManager()
+        template = manager.get_template("fastapi")
+
+        assert template is not None
+        assert "variables" in template
+        assert "APP_NAME" in template["variables"]
+
+    def test_apply_template(self):
+        """Test applying a template."""
+        from env_pro.core.template import TemplateManager
+
+        manager = TemplateManager()
+        content = manager.apply_template("minimal", {"ENVIRONMENT": "production", "DEBUG": "false"})
+
+        assert "ENVIRONMENT=production" in content
+        assert "DEBUG=false" in content
+        assert "# Generated by env-pro" in content
+
+    def test_apply_template_with_output(self, temp_dir):
+        """Test applying template to a file."""
+        from env_pro.core.template import TemplateManager
+
+        manager = TemplateManager()
+        output_file = temp_dir / ".env"
+        manager.apply_template("minimal", {"ENVIRONMENT": "test"}, output_file=output_file)
+
+        assert output_file.exists()
+        content = output_file.read_text()
+        assert "ENVIRONMENT=test" in content
+
+    def test_get_nonexistent_template(self):
+        """Test getting a template that doesn't exist."""
+        from env_pro.core.template import TemplateManager
+
+        manager = TemplateManager()
+        template = manager.get_template("nonexistent")
+
+        assert template is None