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Testing RouterWrapper Component Implementation in Apache Airflow

This test suite validates the RouterWrapper component functionality in Apache Airflow’s UI, ensuring proper rendering of child components and empty states. The tests verify the component’s core routing wrapper capabilities using React Testing Library and Vitest.

Test Coverage Overview

The test coverage focuses on two primary scenarios for the RouterWrapper component:

Verification of correct child component rendering
Handling of empty wrapper states without children

The tests ensure the component maintains its structural integrity in both standard and edge cases.

Implementation Analysis

The testing approach utilizes React Testing Library’s render method combined with Vitest’s testing framework. The implementation follows component isolation principles, testing both the presence of rendered children and the wrapper’s behavior without content.

The tests leverage modern React testing patterns with DOM querying and assertion methods.

Technical Details

Testing Framework: Vitest
UI Testing Library: @testing-library/react
Component Type: Router Wrapper Component
Test Environment: React Component Testing
Assertion Methods: toBeInTheDocument()

Best Practices Demonstrated

The test suite demonstrates several testing best practices including component isolation, minimal test cases that cover critical functionality, and proper use of testing library queries.

Clean and focused test cases
Proper component rendering verification
Effective use of testing library utilities
Clear test descriptions

apache/airflow

airflow/ui/src/utils/RouterWrapper.test.tsx

            
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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
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 * KIND, either express or implied.  See the License for the
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import { render } from "@testing-library/react";
import { describe, it, expect } from "vitest";

import { RouterWrapper } from "src/utils/RouterWrapper.tsx";

describe("RouterWrapper", () => {
  it("renders children correctly", () => {
    const { getByText } = render(
      <RouterWrapper>
        <div>Test Child</div>
      </RouterWrapper>,
    );

    expect(getByText("Test Child")).toBeInTheDocument();
  });

  it("renders without children", () => {
    const { container } = render(<RouterWrapper />);

    expect(container).toBeInTheDocument();
  });
});