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Add unit tests for sSerialFlowToStr#15

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test-serial-flow-15767447349940031235
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Add unit tests for sSerialFlowToStr#15
zknpr wants to merge 1 commit intosecurity-fixes-and-community-prsfrom
test-serial-flow-15767447349940031235

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@zknpr
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@zknpr zknpr commented Feb 7, 2026

🎯 What:
Added a new unit test for sSerialFlowToStr in src/serial.c.

📊 Coverage:
The test covers all enum values of eSerialFlow:

  • SERIAL_FLOW_NONE -> "none"
  • SERIAL_FLOW_RTSCTS -> "hardware"
  • SERIAL_FLOW_XONXOFF -> "software"
  • SERIAL_FLOW_RS485_RTS_AFTER_SEND -> "rs485 rts after send"
  • SERIAL_FLOW_RS485_RTS_ON_SEND -> "rs485 rts on send"
  • SERIAL_FLOW_UNKNOWN and invalid values -> "Unknown"

Result:
Improved test coverage for serial configuration string conversion. The project now has a testing infrastructure using CTest.


PR created automatically by Jules for task 15767447349940031235 started by @zknpr

Added a new test suite 'tests/test_serial.c' to verify the behavior of
'sSerialFlowToStr' function in 'src/serial.c'.
Updated CMake configuration to enable testing and include the new test.

Co-authored-by: zknpr <96851588+zknpr@users.noreply.github.com>
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Summary of Changes

Hello @zknpr, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the project's testing capabilities by introducing a new unit test for the sSerialFlowToStr function and establishing a CTest-based testing framework. This ensures the correct behavior of serial flow string conversions and lays the groundwork for improved code quality through automated testing.

Highlights

  • Unit Test Addition: A new unit test has been added for the sSerialFlowToStr function located in src/serial.c.
  • Test Coverage: The new test comprehensively covers all defined eSerialFlow enum values, including SERIAL_FLOW_NONE, SERIAL_FLOW_RTSCTS, SERIAL_FLOW_XONXOFF, SERIAL_FLOW_RS485_RTS_AFTER_SEND, SERIAL_FLOW_RS485_RTS_ON_SEND, SERIAL_FLOW_UNKNOWN, and an invalid value.
  • Testing Infrastructure: This pull request introduces and configures a CTest-based testing infrastructure for the project, enabling future unit test integration.

🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console.

Changelog
  • CMakeLists.txt
    • Enabled CTest testing for the project.
    • Added a new subdirectory tests to the build system.
  • tests/CMakeLists.txt
    • Created a new CMake file to define the test_serial executable.
    • Linked test_serial.c and ../src/serial.c to the executable.
    • Registered test_serial as a CTest test.
  • tests/test_serial.c
    • Added a new C source file containing unit tests for the sSerialFlowToStr function.
    • Implemented a series of test cases to verify the correct string conversion for all eSerialFlow enum values.
Activity
  • The pull request was automatically created by Jules for a task initiated by @zknpr.
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Code Review

This pull request introduces a testing infrastructure using CTest and adds the first unit test for sSerialFlowToStr. The changes are well-structured, and the test cases provide good coverage for the target function. I have one suggestion to improve the structure of the test file for better long-term maintainability as more tests are added to the project. Overall, this is a great addition to improve code quality and robustness.

Comment on lines +5 to +37
int main(void) {
struct {
eSerialFlow flow;
const char *expected;
} test_cases[] = {
{SERIAL_FLOW_NONE, "none"},
{SERIAL_FLOW_RTSCTS, "hardware"},
{SERIAL_FLOW_XONXOFF, "software"},
{SERIAL_FLOW_RS485_RTS_AFTER_SEND, "rs485 rts after send"},
{SERIAL_FLOW_RS485_RTS_ON_SEND, "rs485 rts on send"},
{SERIAL_FLOW_UNKNOWN, "Unknown"},
{(eSerialFlow)99, "Unknown"}
};

int num_cases = sizeof(test_cases) / sizeof(test_cases[0]);
int failed = 0;

for (int i = 0; i < num_cases; i++) {
const char *result = sSerialFlowToStr(test_cases[i].flow);
if (strcmp(result, test_cases[i].expected) != 0) {
fprintf(stderr, "Test failed for flow %d: expected '%s', got '%s'\n",
(int)test_cases[i].flow, test_cases[i].expected, result);
failed = 1;
}
}

if (failed) {
return 1;
}

printf("All tests passed\n");
return 0;
}
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medium

This is a great first test! To improve the structure and make it easier to add more tests in the future, consider organizing tests into separate functions. This approach enhances modularity and provides clearer test reports, such as a count of failed tests. Here's a suggested refactoring that encapsulates the test logic in its own function and uses a failure counter.

static int run_sSerialFlowToStr_tests() {
    struct {
        eSerialFlow flow;
        const char *expected;
    } test_cases[] = {
        {SERIAL_FLOW_NONE, "none"},
        {SERIAL_FLOW_RTSCTS, "hardware"},
        {SERIAL_FLOW_XONXOFF, "software"},
        {SERIAL_FLOW_RS485_RTS_AFTER_SEND, "rs485 rts after send"},
        {SERIAL_FLOW_RS485_RTS_ON_SEND, "rs485 rts on send"},
        {SERIAL_FLOW_UNKNOWN, "Unknown"},
        {(eSerialFlow)99, "Unknown"}
    };

    int num_cases = sizeof(test_cases) / sizeof(test_cases[0]);
    int failures = 0;

    for (int i = 0; i < num_cases; i++) {
        const char *result = sSerialFlowToStr(test_cases[i].flow);
        if (strcmp(result, test_cases[i].expected) != 0) {
            fprintf(stderr, "Test failed for sSerialFlowToStr(%d): expected '%s', got '%s'\n",
                    (int)test_cases[i].flow, test_cases[i].expected, result);
            failures++;
        }
    }
    return failures;
}

int main(void) {
    int total_failures = 0;

    total_failures += run_sSerialFlowToStr_tests();

    if (total_failures > 0) {
        fprintf(stderr, "\n%d test(s) failed.\n", total_failures);
        return 1;
    }

    printf("All tests passed\n");
    return 0;
}

@zknpr
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zknpr commented Feb 7, 2026

Tests merged into v1.5.3 as combined test suite. Thank you Jules!

@zknpr zknpr closed this Feb 7, 2026
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Tests merged into v1.5.3 as combined test suite. Thank you Jules!

You're welcome! Glad to hear the tests are merged.

@zknpr zknpr deleted the test-serial-flow-15767447349940031235 branch February 7, 2026 18:19
zknpr added a commit that referenced this pull request Feb 7, 2026
Add comprehensive test suite for serial port configuration functions:
- sSerialFlowToStr: flow control type conversion
- sSerialDataBitsToStr: data bits conversion
- sSerialStopBitsToStr: stop bits conversion
- sSerialParityToStr: parity conversion

Test infrastructure:
- tests/test_serial.c: All serial function tests
- tests/CMakeLists.txt: CTest integration
- BUILD_TESTING option in main CMakeLists.txt

Based on Jules AI contributions from PRs #10, #11, #14, #15
Reviewed by: Gemini Code Assist

Co-Authored-By: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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