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# Atlas Data Lake Tests | ||
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## Introduction | ||
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The YAML and JSON files in this directory are platform-independent tests that drivers can use to assert compatibility | ||
with [Atlas Data Lake](https://www.mongodb.com/docs/datalake/). These tests utilize the | ||
[Unified Test Format](../../unified-test-format/unified-test-format.md). | ||
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Several prose tests, which are not easily expressed in YAML, are also presented in this file. Those tests will need to | ||
be manually implemented by each driver. | ||
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## Test Considerations | ||
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Running these integration tests will require a running `mongohoused` with data available in its `test.driverdata` | ||
collection. See the | ||
[ADL directory in drivers-evergreen-tools](https://github.com/mongodb-labs/drivers-evergreen-tools/tree/master/.evergreen/atlas_data_lake) | ||
and [10gen/mongohouse README](https://github.com/10gen/mongohouse/blob/master/README.md) for more information. | ||
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The test runner for Atlas Data Lake testing MUST NOT drop the collection and/or database under test. In contrast to most | ||
other tests, which insert their own data fixtures into an empty collection, the data for these tests is specified in the | ||
`mongohoused` configuration file. | ||
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Additionally, the test runner MUST NOT execute `killAllSessions` (see: | ||
[Terminating Open Transactions](../../unified-test-format/unified-test-format.md#terminating-open-transactions)) when | ||
connected to Atlas Data Lake. | ||
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## Prose Tests | ||
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The following tests MUST be implemented to fully test compatibility with Atlas Data Lake. | ||
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### 1. Support for `killCursors` command | ||
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Test that the driver properly constructs and issues a | ||
[killCursors](https://www.mongodb.com/docs/manual/reference/command/killCursors/) command to Atlas Data Lake. For this | ||
test, configure an APM listener on a client and execute a query on the `test.driverdata` collection that will leave a | ||
cursor open on the server (e.g. specify `batchSize=2` for a query that would match 3+ documents). Drivers MAY iterate | ||
the cursor if necessary to execute the initial `find` command but MUST NOT iterate further to avoid executing a | ||
`getMore`. | ||
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Observe the CommandSucceededEvent event for the `find` command and extract the cursor's ID and namespace from the | ||
response document's `cursor.id` and `cursor.ns` fields, respectively. Destroy the cursor object and observe a | ||
CommandStartedEvent and CommandSucceededEvent for the `killCursors` command. Assert that the cursor ID and target | ||
namespace in the outgoing command match the values from the `find` command's CommandSucceededEvent. When matching the | ||
namespace, note that the `killCursors` field will contain the collection name and the database may be inferred from | ||
either the `$db` field or accessed via the CommandStartedEvent directly. Finally, assert that the `killCursors` | ||
CommandSucceededEvent indicates that the expected cursor was killed in the `cursorsKilled` field. | ||
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Note: this test assumes that drivers only issue a `killCursors` command internally when destroying a cursor that may | ||
still exist on the server. If a driver constructs and issues `killCursors` commands in other ways (e.g. public API), | ||
this test MUST be adapted to test all such code paths. | ||
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### 2. Connect without authentication | ||
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Test that the driver can establish a connection with Atlas Data Lake without authentication. For these tests, create a | ||
MongoClient using a valid connection string without auth credentials and execute a ping command. | ||
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### 3. Connect with authentication | ||
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Test that the driver can establish a connection with Atlas Data Lake with authentication. For these tests, create a | ||
MongoClient using a valid connection string with SCRAM-SHA-1 and credentials from the drivers-evergreen-tools ADL | ||
configuration and execute a ping command. Repeat this test using SCRAM-SHA-256. | ||
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## Changelog | ||
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- 2024-03-08: Convert legacy ADL tests to unified format. Convert test README from reStructuredText to Markdown. | ||
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- 2022-10-05: Add spec front matter | ||
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- 2020-07-15: Link to CRUD test runner implementation and note that the collection under test must not be dropped before | ||
each test. |
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