How to Run and Debug Unit Tests With Flags in VS Code While Avoiding Protoregistry Conflicts?

Run and Debug Unit Tests with Flags in VS Code

When running unit tests with flags in VS Code, developers may encounter issues related to protoregistry conflicts. This article aims to address this problem by providing solutions for running and debugging tests with specific flags.

Running Tests

To specify flags for unit tests in VS Code, navigate to the Settings page (Ctrl ,) and search for "go.testFlags". Add the following JSON code to the array:

<code class="json">"go.testFlags": [        
    "-ldflags",
    "\"-X google.golang.org/protobuf/reflect/protoregistry.conflictPolicy=warn\""
]</code>

Debugging Tests

To debug tests with flags, a slightly different configuration is required. Modify the "go.testFlags" value in the settings.json file as follows:

<code class="json">"go.testFlags": [        
    "-ldflags",
    "'-X google.golang.org/protobuf/reflect/protoregistry.conflictPolicy=warn'"
]</code>

Note the addition of single quotes around the flag value.

Alternative Debugging Method

If the flag issue persists, consider using an alternative debugging method. Compile the test binary with the following command:

go test -c -ldflags "-X google.golang.org/protobuf/reflect/protoregistry.conflictPolicy=warn" -gcflags="all=-N -l"

Start a dlv session in headless mode and connect your editor to it. Set breakpoints and navigate the debug panel for a detailed debugging experience.

Conclusion

By adjusting the "go.testFlags" setting in VS Code and considering alternative debugging methods, developers can effectively run and debug unit tests with flags, eliminating protoregistry conflicts and enhancing their testing workflows.

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