openthread/tests/unit/test_string.cpp

/*
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 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 */

#include "test_platform.h"

#include <openthread/config.h>

#include "test_util.h"
#include "common/code_utils.hpp"
#include "common/string.hpp"

namespace ot {

enum
{
    kStringSize = 10,
};

template <uint16_t kSize> void PrintString(const char *aName, const String<kSize> aString)
{
    printf("\t%s = [%d] \"%s\"\n", aName, aString.GetLength(), aString.AsCString());
}

void TestString(void)
{
    otError             error;
    String<kStringSize> str1;
    String<kStringSize> str2("abc");
    String<kStringSize> str3("%d", 12);

    printf("\nTest 1: String constructor\n");

    VerifyOrQuit(str1.GetSize() == kStringSize, "GetSize() failed");

    VerifyOrQuit(str1.GetLength() == 0, "GetLength() failed for empty string");
    VerifyOrQuit(str2.GetLength() == 3, "GetLength() failed");
    VerifyOrQuit(str3.GetLength() == 2, "GetLength() failed");

    VerifyOrQuit(strcmp(str1.AsCString(), "") == 0, "String content is incorrect");
    VerifyOrQuit(strcmp(str2.AsCString(), "abc") == 0, "String content is incorrect");
    VerifyOrQuit(strcmp(str3.AsCString(), "12") == 0, "String content is incorrect");

    PrintString("str1", str1);
    PrintString("str2", str2);
    PrintString("str3", str3);

    printf(" -- PASS\n");

    printf("\nTest 2: String::Set() and String::Clear() method\n");

    error = str1.Set("Hello");
    SuccessOrQuit(error, "String::Set() failed unexpectedly");
    VerifyOrQuit(str1.GetLength() == 5, "GetLength() failed for empty string");
    VerifyOrQuit(strcmp(str1.AsCString(), "Hello") == 0, "String content is incorrect");
    PrintString("str1", str1);

    str1.Clear();
    VerifyOrQuit(str1.GetLength() == 0, "GetLength() failed for empty string");
    VerifyOrQuit(strcmp(str1.AsCString(), "") == 0, "String content is incorrect");

    str1.Set("%d", 12);
    VerifyOrQuit(str1.GetLength() == 2, "GetLength() failed");
    VerifyOrQuit(strcmp(str1.AsCString(), "12") == 0, "String content is incorrect");
    PrintString("str1", str1);

    error = str1.Set("abcdefghijklmnopqratuvwxyzabcdefghijklmnopqratuvwxyz");
    VerifyOrQuit(error == OT_ERROR_NO_BUFS, "String::Set() did not handle overflow buffer correctly");
    PrintString("str1", str1);

    printf("\nTest 3: String::Append() method\n");

    str2.Clear();
    VerifyOrQuit(str2.GetLength() == 0, "GetLength() failed for empty string");
    VerifyOrQuit(strcmp(str2.AsCString(), "") == 0, "String content is incorrect");

    error = str2.Append("Hi");
    SuccessOrQuit(error, "String::Append() failed unexpectedly");
    VerifyOrQuit(str2.GetLength() == 2, "GetLength() failed");
    VerifyOrQuit(strcmp(str2.AsCString(), "Hi") == 0, "String content is incorrect");
    PrintString("str2", str2);

    error = str2.Append("%s%d", "!", 12);
    SuccessOrQuit(error, "String::Append() failed unexpectedly");
    VerifyOrQuit(str2.GetLength() == 5, "GetLength() failed");
    VerifyOrQuit(strcmp(str2.AsCString(), "Hi!12") == 0, "String content is incorrect");
    PrintString("str2", str2);

    error = str2.Append("abcdefghijklmnopqratuvwxyzabcdefghijklmnopqratuvwxyz");
    VerifyOrQuit(error == OT_ERROR_NO_BUFS, "String::Append() did not handle overflow buffer correctly");
    PrintString("str2", str2);

    printf(" -- PASS\n");
}

} // namespace ot

int main(void)
{
    ot::TestString();
    printf("\nAll tests passed.\n");
    return 0;
}