# Extra test cases running in kafka stage #PV1 **URL:** \ **Category:** Challenges\ **Tags:** challenge:kafka\ **Created:** [December 9, 2024, 5:15am UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369 "2024-12-09T05:15:00Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mahendrabishnoi2](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.codecrafters.io/mahendrabishnoi2/32/3374_2.png) [@mahendrabishnoi2](https://forum.codecrafters.io/u/mahendrabishnoi2)\ **Post date:** [December 9, 2024, 5:15am UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369/1 "2024-12-09T05:15:00Z")
I’m stuck on Stage #PV1 My code is passing tests for this stage but tester is running tests from previous stage (#NC5) again and that’s not handled in my code. Are we supposed to evolve code in a way it handles all the previous stages? Am I missing something here? Here are my logs: ```auto remote: [tester::#PV1] Running tests for Stage #PV1 (Handle APIVersions requests) remote: [tester::#PV1] $ ./your_program.sh /tmp/server.properties remote: [tester::#PV1] Connecting to broker at: localhost:9092 remote: [your_program] Logs from your program will appear here! remote: [tester::#PV1] Connection to broker at localhost:9092 successful remote: [tester::#PV1] Sending "ApiVersions" (version: 4) request (Correlation id: 1630436662) remote: [tester::#PV1] Hexdump of sent "ApiVersions" request: remote: [tester::#PV1] Idx | Hex | ASCII remote: [tester::#PV1] -----+-------------------------------------------------+----------------- remote: [tester::#PV1] 0000 | 00 00 00 23 00 12 00 04 61 2e 7d 36 00 09 6b 61 | ...#....a.}6..ka remote: [tester::#PV1] 0010 | 66 6b 61 2d 63 6c 69 00 0a 6b 61 66 6b 61 2d 63 | fka-cli..kafka-c remote: [tester::#PV1] 0020 | 6c 69 04 30 2e 31 00 | li.0.1. remote: [tester::#PV1] remote: [tester::#PV1] Hexdump of received "ApiVersions" response: remote: [tester::#PV1] Idx | Hex | ASCII remote: [tester::#PV1] -----+-------------------------------------------------+----------------- remote: [tester::#PV1] 0000 | 00 00 00 13 61 2e 7d 36 00 00 02 00 12 00 00 00 | ....a.}6........ remote: [tester::#PV1] 0010 | 0a 00 00 00 00 00 00 | ....... remote: [tester::#PV1] remote: [tester::#PV1] [Decoder] - .ResponseHeader remote: [tester::#PV1] [Decoder] - .correlation_id (1630436662) remote: [tester::#PV1] [Decoder] - .ResponseBody remote: [tester::#PV1] [Decoder] - .error_code (0) remote: [tester::#PV1] [Decoder] - .num_api_keys (1) remote: [tester::#PV1] [Decoder] - .ApiKeys[0] remote: [tester::#PV1] [Decoder] - .api_key (18) remote: [tester::#PV1] [Decoder] - .min_version (0) remote: [tester::#PV1] [Decoder] - .max_version (10) remote: [tester::#PV1] [Decoder] - .TAG_BUFFER remote: [tester::#PV1] [Decoder] - .throttle_time_ms (0) remote: [tester::#PV1] [Decoder] - .TAG_BUFFER remote: [tester::#PV1] ✓ Correlation ID: 1630436662 remote: [tester::#PV1] ✓ Error code: 0 (NO_ERROR) remote: [tester::#PV1] ✓ API keys array is non-empty remote: [tester::#PV1] ✓ API version 4 is supported for API_VERSIONS remote: [tester::#PV1] Test passed. remote: [tester::#PV1] Terminating program remote: [your_program] Received data: [0 18 0 4] (1630436662) remote: [tester::#PV1] Program terminated successfully remote: remote: [tester::#NC5] Running tests for Stage #NC5 (Parse API Version) remote: [tester::#NC5] $ ./your_program.sh /tmp/server.properties remote: [tester::#NC5] Connecting to broker at: localhost:9092 remote: [your_program] Logs from your program will appear here! remote: [tester::#NC5] Connection to broker at localhost:9092 successful remote: [tester::#NC5] Sending "ApiVersions" (version: -24371) request (Correlation id: 841604514) remote: [tester::#NC5] Hexdump of sent "ApiVersions" request: remote: [tester::#NC5] Idx | Hex | ASCII remote: [tester::#NC5] -----+-------------------------------------------------+----------------- remote: [tester::#NC5] 0000 | 00 00 00 23 00 12 a0 cd 32 29 dd a2 00 09 6b 61 | ...#....2)....ka remote: [tester::#NC5] 0010 | 66 6b 61 2d 63 6c 69 00 0a 6b 61 66 6b 61 2d 63 | fka-cli..kafka-c remote: [tester::#NC5] 0020 | 6c 69 04 30 2e 31 00 | li.0.1. remote: [tester::#NC5] remote: [tester::#NC5] Hexdump of received "ApiVersions" response: remote: [tester::#NC5] Idx | Hex | ASCII remote: [tester::#NC5] -----+-------------------------------------------------+----------------- remote: [tester::#NC5] 0000 | 00 00 00 13 32 29 dd a2 00 00 02 00 12 00 00 00 | ....2).......... remote: [tester::#NC5] 0010 | 0a 00 00 00 00 00 00 | ....... remote: [tester::#NC5] remote: [tester::#NC5] [Decoder] - .Response remote: [tester::#NC5] [Decoder] - .message_length (19) remote: [tester::#NC5] [Decoder] - .ResponseHeader remote: [tester::#NC5] [Decoder] - .correlation_id (841604514) remote: [tester::#NC5] [Decoder] - .error_code (0) remote: [tester::#NC5] ✓ Correlation ID: 841604514 remote: [tester::#NC5] Expected Error code to be 35, got 0 remote: [tester::#NC5] Test failed remote: [tester::#NC5] Terminating program remote: [your_program] Received data: [0 18 160 205] (841604514) remote: [tester::#NC5] Program terminated successfully ``` And here’s a snippet of my code: ```go resp := make([]byte, 23) // message size binary.BigEndian.PutUint32(resp[0:4], 19) copy(resp[4:8], buffer[8:12]) // correlation id // API Versions Response Body // error code binary.BigEndian.PutUint16(resp[8:10], 0) // API Versions array // length of array = 1 byte resp[10] = 0x02 // element 1 // api key (2 bytes), min version (2 bytes), max version (2 bytes), tag buffer (0x00) (1 byte) binary.BigEndian.PutUint16(resp[11:13], 18) // api key binary.BigEndian.PutUint16(resp[13:15], 0) // min version binary.BigEndian.PutUint16(resp[15:17], 10) // max version resp[17] = 0 // tag buffer binary.BigEndian.PutUint32(resp[18:], 0) // throttle time resp[22] = 0 // tag buffer _, err = conn.Write(resp) if err != nil { fmt.Println("Error writing data: ", err.Error()) os.Exit(1) } ``` ---
**Author:** ![andy1li](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.codecrafters.io/andy1li/32/10_2.png) [@andy1li](https://forum.codecrafters.io/u/andy1li)\ **Post date:** [December 9, 2024, 6:02am UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369/2 "2024-12-09T06:02:35Z")
> Are we supposed to evolve code in a way it handles all the previous stages? Yes, your code should be able to handle all the stages you’ve completed so far. Feel free to ask for help if you run into any issues! ---
**Author:** ![mahendrabishnoi2](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.codecrafters.io/mahendrabishnoi2/32/3374_2.png) [@mahendrabishnoi2](https://forum.codecrafters.io/u/mahendrabishnoi2)\ **Post date:** [December 9, 2024, 6:33am UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369/3 "2024-12-09T06:33:42Z")
> [@andy1li](#): > > Yes, your code should be able to handle all the stages you’ve completed so far. When we have to hardcode error code as 35 in stage 4 and error code as 0 in stage 5, how can we handle all previous stages? ---
**Author:** ![andy1li](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.codecrafters.io/andy1li/32/10_2.png) [@andy1li](https://forum.codecrafters.io/u/andy1li)\ **Post date:** [December 9, 2024, 7:28am UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369/4 "2024-12-09T07:28:52Z")
Ideally, the `error_code` shouldn’t be hardcoded. The value 35 is specifically for cases where the `request_api_version` is not between 0 and 4. ![image](https://canada1.discourse-cdn.com/flex003/uploads/codecrafters/original/2X/7/79213034df4a96bcafc2a5000ce87cccfbb132f5.png) ---
**Author:** ![mahendrabishnoi2](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.codecrafters.io/mahendrabishnoi2/32/3374_2.png) [@mahendrabishnoi2](https://forum.codecrafters.io/u/mahendrabishnoi2)\ **Post date:** [December 9, 2024, 2:16pm UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369/5 "2024-12-09T14:16:45Z")
Thanks @andy1li. That explains it. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex003/uploads/codecrafters/original/3X/7/0/700657133935c15703e22c7c8870394f6e6dc27d.svg) [@system](https://forum.codecrafters.io/u/system)\ **Post date:** [December 14, 2024, 2:17pm UTC](https://forum.codecrafters.io/t/extra-test-cases-running-in-kafka-stage-pv1/3369/6 "2024-12-14T14:17:40Z")
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