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DRIVERS-3162 Add test for SRV hostname validation when resolver and r… #1787

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…esolved hostnames are identical with three domain levels

Please complete the following before merging:

  • Update changelog.
  • Test changes in at least one language driver.
  • Test these changes against all server versions and topologies (including standalone, replica set, sharded
    clusters, and serverless).

…esolved hostnames are identical with three domain levels
@aclark4life aclark4life requested a review from a team as a code owner April 22, 2025 01:31
@aclark4life aclark4life requested review from dariakp and removed request for a team April 22, 2025 01:31
@dariakp dariakp requested a review from ShaneHarvey April 22, 2025 13:13
@@ -48,6 +48,10 @@ For this test, run each of the following cases:
- the SRV `mongodb+srv://mongo.local` resolving to `test_1.my_hostmongo.local`
- the SRV `mongodb+srv://blogs.mongodb.com` resolving to `cluster.testmongodb.com`

### 5. Do not throw when return address is identical to SRV hostname and SRV hostname has three or more `.` separated parts

- the SRV `mongodb+srv://blogs.mongodb.com` resolving to `blogs.mongodb.com`
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Should we add the case where mongodb+srv://blogs.mongodb.com resolves to test.blogs.mongodb.com? Or is that already tested elsewhere?

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Not sure. We're adding the 5th test because the previous 3 tests confirm that an error is raised. Similar to the first test in which we confirm there is no error, this test confirms there is no error. IIUC, a response of test.blogs.mongodb.com is valid because the domains match, but the hostnames are not identical so we're not looking for this particular success in this test case.

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