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rhai_tests/text/04_template_builder.rhai

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+// 04_template_builder.rhai
+// Tests for template rendering functions in the Text module
+
+// Custom assert function
+fn assert_true(condition, message) {
+    if !condition {
+        print(`ASSERTION FAILED: ${message}`);
+        throw message;
+    }
+}
+
+// Custom assert_eq function
+fn assert_eq(actual, expected, message) {
+    if actual != expected {
+        print(`ASSERTION FAILED: ${message}`);
+        print(`Expected: "${expected}"`);
+        print(`Actual: "${actual}"`);
+        throw message;
+    }
+}
+
+print("=== Testing Template Rendering Functions ===");
+
+// Create a temporary directory for testing
+let test_dir = "rhai_test_template";
+mkdir(test_dir);
+
+// Test TemplateBuilder with string template
+print("Testing TemplateBuilder with string template...");
+
+// Test case 1: Basic template with string variable
+let template1 = "Hello, {{ name }}!";
+let builder1 = template_builder_open(template1);
+builder1.add_var("name", "World");
+let expected_output1 = "Hello, World!";
+let output1 = builder1.render();
+assert_eq(output1, expected_output1, "Basic template with string variable should render correctly");
+print("✓ TemplateBuilder: Basic template with string variable renders correctly");
+
+// Test case 2: Template with multiple variables of different types
+let template2 = "{{ name }} is {{ age }} years old and {{ is_active ? 'active' : 'inactive' }}.";
+let builder2 = template_builder_open(template2);
+builder2.add_var("name", "John");
+builder2.add_var("age", 30);
+builder2.add_var("is_active", true);
+let expected_output2 = "John is 30 years old and active.";
+let output2 = builder2.render();
+assert_eq(output2, expected_output2, "Template with multiple variables should render correctly");
+print("✓ TemplateBuilder: Template with multiple variables renders correctly");
+
+// Test case 3: Template with array variable
+let template3 = "Items: {% for item in items %}{{ item }}{% if !loop.last %}, {% endif %}{% endfor %}";
+let builder3 = template_builder_open(template3);
+let items = ["apple", "banana", "cherry"];
+builder3.add_var("items", items);
+let expected_output3 = "Items: apple, banana, cherry";
+let output3 = builder3.render();
+assert_eq(output3, expected_output3, "Template with array variable should render correctly");
+print("✓ TemplateBuilder: Template with array variable renders correctly");
+
+// Test case 4: Template with map variable
+let template4 = "User: {{ user.name }}, Age: {{ user.age }}";
+let builder4 = template_builder_open(template4);
+let user = #{
+    name: "Alice",
+    age: 25
+};
+builder4.add_vars(user);
+let expected_output4 = "User: Alice, Age: 25";
+let output4 = builder4.render();
+assert_eq(output4, expected_output4, "Template with map variable should render correctly");
+print("✓ TemplateBuilder: Template with map variable renders correctly");
+
+// Test TemplateBuilder with file operations
+print("\nTesting TemplateBuilder with file operations...");
+
+// Create a template file
+let template_file = `${test_dir}/template.txt`;
+let template_content = "Hello, {{ name }}! You are {{ age }} years old.";
+file_write(template_file, template_content);
+
+// Test case 5: Template from file
+let builder5 = template_builder_open(template_file);
+builder5.add_var("name", "Bob");
+builder5.add_var("age", 40);
+let expected_output5 = "Hello, Bob! You are 40 years old.";
+let output5 = builder5.render();
+assert_eq(output5, expected_output5, "Template from file should render correctly");
+print("✓ TemplateBuilder: Template from file renders correctly");
+
+// Test case 6: Render to file
+let output_file = `${test_dir}/output.txt`;
+builder5.render_to_file(output_file);
+let output_content = file_read(output_file);
+assert_eq(output_content, expected_output5, "render_to_file should write the rendered content to a file");
+print("✓ TemplateBuilder: render_to_file works correctly");
+
+// Clean up
+delete(test_dir);
+print("✓ Cleanup: Test directory removed");
+
+print("\nAll template rendering tests completed successfully!");