[rfq] add test for unknown chainid

To add a test for an unknown chain ID, follow these steps:

Locate the Test File: Navigate to the test file where chain ID tests are implemented. This is likely in the tests directory, possibly under a file related to chain ID validation.
Add Test Case: Add a new test case for an unknown chain ID. For example, in a file like ChainIDTest.js, add the following code:

it('should handle unknown chain ID', async () => {
  const unknownChainID = 9999; // Example unknown chain ID
  try {
    await someFunctionThatUsesChainID(unknownChainID);
  } catch (error) {
    assert.equal(error.message, 'Unknown chain ID');
  }
});

Update Functionality: Ensure the function that uses the chain ID throws an error for unknown IDs. For example, in ChainIDHandler.js:

function someFunctionThatUsesChainID(chainID) {
  const knownChainIDs = [1, 3, 4, 5]; // Example known chain IDs
  if (!knownChainIDs.includes(chainID)) {
    throw new Error('Unknown chain ID');
  }
  // existing functionality
}

Commit Changes: Commit the changes with a message like Add test for unknown chain ID.

References

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synapsecns / sanguine

[rfq] add test for unknown chainid #3006

References