A practical guide to testing Model Context Protocol (MCP) tools in Spring AI. Covers creating a sample MCP tool (an exchange rate service), writing unit tests with mocked dependencies, building a reusable test MCP client factory that supports both SSE and Streamable HTTP protocols, verifying tool registration on the MCP server,

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Table of contents
1. Overview2. Maven Dependencies3. Creating a Sample MCP Tool4. Unit Test5. Creating an MCP Test Client6. Verifying Tool Registration7. Testing Tool Invocation8. Conclusions

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