[RTL13] Fix existing impl. for server sent DETACH #1054
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🧹 Nitpick comments (2)
lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java (2)
1739-1745: Refactor state sequence assertions to improve test robustnessAsserting the exact size and order of
channelStatescan make the test brittle to future changes in state transitions. Consider verifying the sequence of key states without hardcoding their positions.Apply this diff to refactor the assertions:
- Assert.assertEquals(4, channelStates.size()); - Assert.assertEquals(ChannelState.attaching, channelStates.get(0)); - Assert.assertEquals(ChannelState.attached, channelStates.get(1)); - Assert.assertEquals(ChannelState.attaching, channelStates.get(2)); - Assert.assertEquals(ChannelState.attached, channelStates.get(3)); + List<ChannelState> expectedStates = Arrays.asList( + ChannelState.attaching, + ChannelState.attached, + ChannelState.attaching, + ChannelState.attached + ); + Assert.assertTrue(channelStates.containsAll(expectedStates));
1795-1802: Refactor assertions to enhance test maintainabilityDirectly asserting the size and exact order of
channelStatesmay lead to brittle tests. It's advisable to verify the presence and order of important states to make the test more resilient to future changes.Consider the following refactor:
- Assert.assertEquals(5, channelStates.size()); - Assert.assertEquals(ChannelState.attaching, channelStates.get(0)); - Assert.assertEquals(ChannelState.attached, channelStates.get(1)); - Assert.assertEquals(ChannelState.suspended, channelStates.get(2)); - Assert.assertEquals(ChannelState.attaching, channelStates.get(3)); - Assert.assertEquals(ChannelState.attached, channelStates.get(4)); + List<ChannelState> expectedStates = Arrays.asList( + ChannelState.attaching, + ChannelState.attached, + ChannelState.suspended, + ChannelState.attaching, + ChannelState.attached + ); + Assert.assertTrue(channelStates.containsAll(expectedStates));
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lib/src/main/java/io/ably/lib/realtime/ChannelBase.java(2 hunks)lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java(3 hunks)
🔇 Additional comments (5)
lib/src/main/java/io/ably/lib/realtime/ChannelBase.java (2)
247-248: Appropriate handling of connection states during attach
The added check for ConnectionState.connecting and ConnectionState.disconnected ensures that the channel correctly handles attaching when the connection is in these states, enhancing robustness during state transitions.
1299-1304: Correct reattach logic on unexpected DETACH in attached or suspended states
The implementation properly reattaches the channel when an unexpected DETACH is received while the channel is in the attached or suspended state, adhering to the specification RTL13a.
lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java (3)
29-29: Added necessary import statements
The addition of org.junit.Assert import statements supports the use of assertion methods in the test cases, ensuring code clarity and reducing the need for fully qualified class names.
Line range hint 1707-1751: Comprehensive test for server-initiated DETACH in attached state
The new test server_initiated_detach_for_attached_channel effectively verifies the channel state transitions when a server-initiated DETACH is received while the channel is attached, ensuring correct reattachment behavior as per RTL13a.
1753-1802: Added test for server-initiated DETACH in suspended state
The new test server_initiated_detach_for_suspended_channel correctly checks the channel's behavior upon receiving a server-initiated DETACH while in the suspended state, ensuring compliance with specification RTL13a.
1. Removed use of explicitly setting detached state 2. Fixed attachWithTimeout method call, set forcedAttach flag to true 3. Updated tests to track channel state changes on server sent DETACH
…RTL5g) 1. Added missing callCompletionListenerError when detachImpl throws exception on invalid connection state 2. Added separate test case for the spec RTL5g 3. Annotated channel detach tests with appropriate spec
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🧹 Nitpick comments (3)
lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java (3)
Line range hint
1791-1840: Consider a more descriptive test name.The test thoroughly validates the channel state transitions and error propagation. However, consider renaming it to better describe the test scenario, e.g.,
test_server_initiated_detach_transitions_attached_channel_through_attaching_to_attached.
Line range hint
1849-1902: Consider extracting common setup code.The test thoroughly validates the channel state transitions and error propagation. However, there's significant setup code duplication with
server_initiated_detach_for_attached_channel. Consider extracting the common setup into a helper method.+ private void setupChannelAndWaitForState(String channelName, ChannelState targetState, ErrorInfo error) throws AblyException { + Channel channel = ably.channels.get(channelName); + ChannelWaiter channelWaiter = new ChannelWaiter(channel); + channel.attach(); + channelWaiter.waitFor(ChannelState.attached); + if (error != null) { + channel.setSuspended(error, true); + channelWaiter.waitFor(targetState); + } + return new ChannelTestContext(channel, channelWaiter); + }
1164-1231: Enhance assertion messages for better test failure diagnostics.The test thoroughly validates error handling in detach operations. However, the assertions could benefit from more descriptive messages to help diagnose test failures.
- assertFalse(detachWaiter1.success); - assertNotNull(detachWaiter1.error); - assertEquals("Connection is closing", detachWaiter1.error.message); - assertEquals(80001, detachWaiter1.error.code); + assertFalse("Detach should fail when connection is closing", detachWaiter1.success); + assertNotNull("Error should be present for failed detach", detachWaiter1.error); + assertEquals("Error message should indicate connection closing", "Connection is closing", detachWaiter1.error.message); + assertEquals("Error code should be CONNECTION_CLOSING(80001)", 80001, detachWaiter1.error.code);
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lib/src/main/java/io/ably/lib/realtime/ChannelBase.java(7 hunks)lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java(9 hunks)
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🔇 Additional comments (3)
lib/src/main/java/io/ably/lib/realtime/ChannelBase.java (3)
93-101: LGTM! Well-structured error handling implementation.The implementation follows good practices with proper encapsulation and thread-safe error handling. The getter method appropriately clears the error after retrieval, which is good for one-time error handling.
1312-1318: LGTM! Proper implementation of RTL13a spec requirement.The code correctly handles server-initiated detach for both attached and suspended states by:
- Storing the error from the detach message
- Attempting immediate reattachment
624-624: LGTM! Proper error handling as per RTL5g.The implementation correctly propagates error information to the completion listener.
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🧹 Nitpick comments (2)
lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java (2)
Line range hint
1786-1840: Consider enhancing test readability and error validation.The test implementation for RTL13a looks good, but consider these improvements:
- Add a descriptive comment explaining the expected behavior when a server sends a DETACH message with an error.
- Use a more descriptive error message that indicates the test scenario.
- Add assertions to verify that the error is properly propagated during each state transition.
/* * Establish connection, attach channel, simulate sending detached messages * from the server for channel in attached state. + * + * Expected behavior: + * 1. When server sends DETACH with error, channel should transition to ATTACHING + * 2. Error from DETACH should be propagated during state change + * 3. Channel should automatically attempt to reattach + * 4. Final state should be ATTACHED after successful reattachment * * Tests RTL13a */ @Test public void server_initiated_detach_for_attached_channel() throws AblyException { // ... ProtocolMessage detachedMessage = new ProtocolMessage() {{ action = Action.detached; channel = channelName; - error = new ErrorInfo("Simulated detach", 40000); + error = new ErrorInfo("Server initiated DETACH with error during test", 40000); }}; // ... + // Verify error propagation in state transitions + ChannelStateListener.ChannelStateChange stateChange = channelWaiter.getLastStateChange(); + Assert.assertEquals("Error should be propagated", detachErr, stateChange.reason);
Line range hint
1842-1902: Consider enhancing test readability and error validation.The test implementation for RTL13a looks good, but consider these improvements:
- Add a descriptive comment explaining the expected behavior when a server sends a DETACH message to a suspended channel.
- Use more descriptive error messages that indicate the test scenario.
- Add assertions to verify that the error is properly propagated during each state transition.
/* * Establish connection, attach channel, simulate sending detached messages * from the server for channel in suspended state. + * + * Expected behavior: + * 1. When server sends DETACH with error to a suspended channel, it should transition to ATTACHING + * 2. Error from DETACH should be propagated during state change + * 3. Channel should automatically attempt to reattach + * 4. Final state should be ATTACHED after successful reattachment * * Tests RTL13a */ @Test public void server_initiated_detach_for_suspended_channel() throws AblyException { // ... - channel.setSuspended(new ErrorInfo("Set state to suspended", 400), true); + channel.setSuspended(new ErrorInfo("Channel suspended during test setup", 400), true); // ... ProtocolMessage detachedMessage = new ProtocolMessage() {{ action = Action.detached; channel = channelName; - error = new ErrorInfo("Simulated detach", 40000); + error = new ErrorInfo("Server initiated DETACH with error during test", 40000); }}; // ... + // Verify error propagation in state transitions + ChannelStateListener.ChannelStateChange stateChange = channelWaiter.getLastStateChange(); + Assert.assertEquals("Error should be propagated", detachError, stateChange.reason);
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lib/src/main/java/io/ably/lib/realtime/ChannelBase.java(9 hunks)lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java(9 hunks)
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🔇 Additional comments (5)
lib/src/main/java/io/ably/lib/realtime/ChannelBase.java (5)
197-197: LGTM!The change maintains backward compatibility while supporting the new error propagation functionality.
247-252: LGTM! Correctly implements RTL4i specification.The code now properly propagates the error during state transition when the connection is in connecting or disconnected state.
280-280: LGTM!The change consistently propagates the error during the state transition to attaching.
353-355: LGTM! Correctly implements RTL5g specification.The code now properly propagates connection errors during detach operations when the connection manager is not active.
1301-1306: LGTM! Correctly implements RTL13a specification.The code now properly handles server-initiated detach for attached and suspended states, attempting immediate reattachment with the error from the detach message.
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1. Updated `attachWithTimeout` and `attachImpl` method to accept attachReason param 2. Updated test assertions for spec RTL13a accordingly
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DETACHEDevent #1051Summary by CodeRabbit
Summary by CodeRabbit
New Features
Bug Fixes
Refactor