Mercurial > hg > ucx / file revision

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "string_tests.h"

UCX_TEST(test_sstr_macros) {
    sstr_t hello = ST("Hello");
    sstr_t world = S("World");
    
    char buf[20];
    snprintf(buf, sizeof(buf), "%" PRIsstr ", %" PRIsstr "!", SFMT(hello), SFMT(world));
    
    UCX_TEST_BEGIN
    const char* cmp = "Hello, World!";
    UCX_TEST_ASSERT(!strcmp(cmp, buf), "Something weird happened.");
    UCX_TEST_END
}

UCX_TEST(test_sstr) {
    sstr_t s1 = sstr((char*)"1234");
    sstr_t s2 = sstrn((char*)"ab", 2);
     
    UCX_TEST_BEGIN
    
    UCX_TEST_ASSERT(s1.length == 4, "s1 length must be 4");
    UCX_TEST_ASSERT(s2.length == 2, "s2 length must be 2");
    
    UCX_TEST_END
}

UCX_TEST(test_sstr_len) {
    sstr_t s1 = ST("1234");
    sstr_t s2 = ST(".:.:.");
    sstr_t s3 = ST("X");
    
    size_t len1 = sstrnlen(1, s1);
    size_t len2 = sstrnlen(2, s1, s2);
    size_t len3 = sstrnlen(3, s1, s2, s3);
    
    UCX_TEST_BEGIN
    
    UCX_TEST_ASSERT(len1 == 4, "sstrnlen returned wrong size");
    UCX_TEST_ASSERT(len2 == 9, "sstrnlen returned wrong size");
    UCX_TEST_ASSERT(len3 == 10, "sstrnlen returned wrong size");

    UCX_TEST_END
}


UCX_TEST(test_sstrchr_sstrrchr) {
    sstr_t str = ST("I will find you - and I will kill you");
    UCX_TEST_BEGIN
    
    sstr_t notfound = sstrchr(str, 'x');
    UCX_TEST_ASSERT(notfound.length == 0,
            "string length not 0 after forward search w/o result");
    
    notfound = sstrrchr(str, 'x');
    UCX_TEST_ASSERT(notfound.length == 0,
            "string length not 0 after reverse search w/o result");
    
    sstr_t result = sstrchr(str, 'w');
    UCX_TEST_ASSERT(result.length == 35, "sstrchr returned wrong length");
    UCX_TEST_ASSERT(strcmp("will find you - and I will kill you", result.ptr)
        == 0, "sstrchr did not return the expected string");
    
    result = sstrrchr(str, 'w');
    UCX_TEST_ASSERT(result.length == 13, "sstrrchr returned wrong length");
    UCX_TEST_ASSERT(strcmp("will kill you", result.ptr)
        == 0, "sstrrchr did not return the expected string");
    
    UCX_TEST_END
}

UCX_TEST(test_sstrstr) {
    sstr_t str = ST("find the match in this string");
    sstr_t longstr = ST(
            "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl"
            "mnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx"
            "yzabcdeababababnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghij"
            "klmnopqrstuvwxyzaababababababababrstuvwxyzabcdefghijklmnopqrstuv"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "wxyz1234567890");
    sstr_t longstrpattern = ST(
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            );
    sstr_t longstrresult = ST(
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "abababababababababababababababababababababababababababababababab"
            "wxyz1234567890"
            );
    UCX_TEST_BEGIN
    
    sstr_t notfound = sstrstr(str, S("no match"));
    UCX_TEST_ASSERT(notfound.length == 0, "no match must return empty string");
    
    sstr_t result = sstrstr(str, S("match"));
    UCX_TEST_ASSERT(result.length == 20, "sstrstr returned wrong length");
    UCX_TEST_ASSERT(!strcmp("match in this string", result.ptr),
        "sstrstr did not return the expected string");
    
    result = sstrstr(str, S(""));
    UCX_TEST_ASSERT(result.length == str.length,
        "sstrstr with empty match string returned wrong length");
    UCX_TEST_ASSERT(!strcmp(str.ptr, result.ptr),
        "sstrstr with empty match string did not return the original string");
    
    result = sstrstr(longstr, longstrpattern);
    UCX_TEST_ASSERT(result.length == longstrresult.length,
            "long string result length incorrect");
    UCX_TEST_ASSERT(!strcmp(result.ptr, longstrresult.ptr),
            "long string result content incorrect");
    
    UCX_TEST_END
}

UCX_TEST(test_sstrcmp) {
    sstr_t str = ST("compare this");
    
    UCX_TEST_BEGIN
    UCX_TEST_ASSERT(sstrcmp(str, S("")) == 1, "empty cmp failed");
    UCX_TEST_ASSERT(sstrcmp(S(""), S("")) == 0, "empty cmp false negative");
    UCX_TEST_ASSERT(sstrcmp(str, S("compare this")) == 0, "false negative");
    UCX_TEST_ASSERT(sstrcmp(str, S("Compare This")) != 0, "false positive");
    UCX_TEST_ASSERT(sstrcmp(str, S("compare tool")) < 0, "memcmp < 0 failed");
    UCX_TEST_ASSERT(sstrcmp(str, S("compare shit")) > 0, "memcmp > 0 failed");
    UCX_TEST_ASSERT(sstrcmp(str, S("compare this not")) < 0, "len < 0 failed");
    UCX_TEST_ASSERT(sstrcmp(str, S("compare")) > 0, "len > 0 failed");
    UCX_TEST_END
}

UCX_TEST(test_sstrcasecmp) {
    
    sstr_t str = ST("compare this");
    
    UCX_TEST_BEGIN
    UCX_TEST_ASSERT(sstrcasecmp(str, S("")) == 1, "empty cmp failed");
    UCX_TEST_ASSERT(sstrcasecmp(S(""), S("")) == 0, "empty cmp false negative");
    UCX_TEST_ASSERT(sstrcasecmp(str, S("compare this")) == 0, "false negative");
    UCX_TEST_ASSERT(sstrcasecmp(str, S("Compare This")) == 0,
        "not ignoring case");
    UCX_TEST_ASSERT(sstrcasecmp(str, S("compare tool")) < 0, "< 0 failed");
    UCX_TEST_ASSERT(sstrcasecmp(str, S("compare shit")) > 0, "> 0 failed");
    UCX_TEST_ASSERT(sstrcasecmp(str, S("compare this not")) < 0,
        "len < 0 failed");
    UCX_TEST_ASSERT(sstrcasecmp(str, S("compare")) > 0, "len > 0 failed");
    UCX_TEST_END
}


UCX_TEST(test_sstrcat) {
    sstr_t s1 = S("12");
    sstr_t s2 = S("34");
    sstr_t s3 = S("56");
    sstr_t sn = { NULL, 0 };
    
    UCX_TEST_BEGIN
    
    sstr_t t1 = sstrcat(2, s1, s2);
    UCX_TEST_ASSERT(!sstrcmp(t1, S("1234")), "t1: wrong content");
    free(t1.ptr);
    
    sstr_t t2 = sstrcat(3, s1, s2, s3);
    UCX_TEST_ASSERT(!sstrcmp(t2, S("123456")), "t2: wrong content");
    free(t2.ptr);
    
    sstr_t t3 = sstrcat(6, s1, sn, s2, sn, s3, sn);
    UCX_TEST_ASSERT(!sstrcmp(t3, S("123456")), "t3: wrong content");
    free(t3.ptr);
    
    sstr_t t4 = sstrcat(2, sn, sn);
    UCX_TEST_ASSERT(t4.ptr, "t4.ptr is NULL");
    UCX_TEST_ASSERT(t4.length == 0, "t4 has wrong length");
    free(t4.ptr);
    
    // overflow test
    sstr_t o0;
    o0.ptr = "";
    o0.length = ((size_t)-1) - 50;
    sstr_t o1;
    o1.ptr = "";
    o1.length = 100;
    sstr_t o2;
    o2.ptr = "";
    o2.length = 10;
    
    sstr_t n = sstrcat(2, o0, o1);
    UCX_TEST_ASSERT(n.ptr == NULL && n.length == 0, "overflow not detected");
    sstr_t n2 = sstrcat(3, o0, o2, o1);
    UCX_TEST_ASSERT(n2.ptr == NULL && n2.length == 0, "n2: overflow not detected");
            
    UCX_TEST_END
    
}

UCX_TEST(test_sstrsplit) {

    const char *original = "this,is,a,csv,string";
    sstr_t test = ST("this,is,a,csv,string"); /* use copy of original here */
    ssize_t n;
    sstr_t *list;

    UCX_TEST_BEGIN

    /* Nullpointer check */
    n = 0;
    UCX_TEST_ASSERT(sstrsplit(test, S(""), &n) == NULL,
            "empty delimiter must return NULL");

    /* no delimiter occurence (ndo) */
    n = 0;
    list = sstrsplit(test, S("z"), &n);
    UCX_TEST_ASSERT(n == 1, "ndo, list length must be 1");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, original) == 0, "ndo, "
            "original string shall be returned as single list element");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
                "ndo, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* partially matching delimiter (pmd) */
    n = 0;
    list = sstrsplit(test, S("stringbuilder"), &n);
    UCX_TEST_ASSERT(n == 1, "pmd, list length must be 1");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, original) == 0, "pmd, "
            "original string shall be returned as single list element");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
                "pmd, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* matching single-char delimiter (mscd) */
    n = 0;
    list = sstrsplit(test, S(","), &n);
    UCX_TEST_ASSERT(n == 5, "mscd, list length must be 5");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "this") == 0, "mscd, item 0 mismatch");
    UCX_TEST_ASSERT(strcmp(list[1].ptr, "is") == 0, "mscd, item 1 mismatch");
    UCX_TEST_ASSERT(strcmp(list[2].ptr, "a") == 0, "mscd, item 2 mismatch");
    UCX_TEST_ASSERT(strcmp(list[3].ptr, "csv") == 0, "mscd, item 3 mismatch");
    UCX_TEST_ASSERT(strcmp(list[4].ptr, "string")==0, "mscd, item 4 mismatch");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "mscd, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* matching multi-char delimiter (mmcd) */
    n = 0;
    list = sstrsplit(test, S("is"), &n);
    UCX_TEST_ASSERT(n == 3, "mscd, list length must be 3");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "th") == 0, "mmcd, item 0 mismatch");
    UCX_TEST_ASSERT(strcmp(list[1].ptr, ",") == 0, "mmcd, item 1 mismatch");
    UCX_TEST_ASSERT(strcmp(list[2].ptr, ",a,csv,string") == 0,
            "mmcd, item 2 mismatch");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "mmcd, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* bounded list using single-char delimiter (blsc) */
    n = 3;
    list = sstrsplit(test, S(","), &n);
    UCX_TEST_ASSERT(n == 3, "blsc, list length must be 3");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "this") == 0, "blsc, item 0 mismatch");
    UCX_TEST_ASSERT(strcmp(list[1].ptr, "is") == 0, "blsc, item 1 mismatch");
    UCX_TEST_ASSERT(strcmp(list[2].ptr, "a,csv,string") == 0,
            "blsc, item 2 mismatch");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "blsc, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* bounded list using multi-char delimiter (blmc) */
    n = 2;
    list = sstrsplit(test, S("is"), &n);
    UCX_TEST_ASSERT(n == 2, "blmc, list length must be 2");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "th") == 0, "blmc, item 0 mismatch");
    UCX_TEST_ASSERT(strcmp(list[1].ptr, ",is,a,csv,string") == 0,
            "blmc, item 1 mismatch");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "blmc, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* start with delimiter (swd) */
    n = 0;
    list = sstrsplit(test, S("this"), &n);
    UCX_TEST_ASSERT(n == 2, "swd, list length must be 2");
    UCX_TEST_ASSERT(list[0].length == 0, "swd, first item must be empty");
    UCX_TEST_ASSERT(strcmp(list[1].ptr, ",is,a,csv,string") == 0,
            "swd, second item corrupt");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "swd, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* end with delimiter (ewd) */
    n = 0;
    list = sstrsplit(test, S("string"), &n);
    UCX_TEST_ASSERT(n == 2, "ewd, list length must be 2");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "this,is,a,csv,") == 0,
            "ewd, first item corrupt");
    UCX_TEST_ASSERT(list[1].length == 0, "ewd, second item must be empty");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "ewd, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);
    
    /* end with delimiter exceed bound (ewdeb) */
    n = 3;
    sstr_t ewdebtest = ST("a,b,c,");
    list = sstrsplit(ewdebtest, S(","), &n);
    UCX_TEST_ASSERT(n == 3, "ewdeb, list length must be 3");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "a") == 0, "ewdeb, fst item corrupt");
    UCX_TEST_ASSERT(strcmp(list[1].ptr, "b") == 0, "ewdeb, snd item corrupt");
    UCX_TEST_ASSERT(strcmp(list[2].ptr, "c,") == 0, "ewdeb, trd item corrupt");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* exact match (exm) */
    n = 0;
    list = sstrsplit(test, S("this,is,a,csv,string"), &n);
    UCX_TEST_ASSERT(n == 0, "exm, list length must be 0");
    UCX_TEST_ASSERT(list == NULL, "exm, list must be NULL");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    /* substring (subs) */
    n = 0;
    list = sstrsplit(test, S("this,is,a,csv,string,with,extension"), &n);
    UCX_TEST_ASSERT(n == 1, "subs, list length must be 1");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, original) == 0,
            "subs, single item must be the original string");
    UCX_TEST_ASSERT(strcmp(test.ptr, original) == 0,
            "subs, original has been modified");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);
    
    /* double encounter delimiter (ded) */
    n = 0;
    list = sstrsplit(test, S("is,"), &n);
    UCX_TEST_ASSERT(n == 3, "ded, list length must be 3");
    UCX_TEST_ASSERT(strcmp(list[0].ptr, "th") == 0, "ded, item 0 mismatch");
    UCX_TEST_ASSERT(list[1].length == 0, "ded, item 1 not empty!");
    UCX_TEST_ASSERT(strcmp(list[2].ptr, "a,csv,string") == 0,
        "ded, item 2 mismatch");
    for(int i=0;i<n;i++) {
        free(list[i].ptr);
    }
    free(list);

    UCX_TEST_END
}

UCX_TEST(test_sstrtrim) {
    sstr_t t1 = sstrtrim(sstr((char*)"  ein test   "));
    sstr_t t2 = sstrtrim(sstr((char*)"abc"));
    sstr_t t3 = sstrtrim(sstr((char*)" 123"));
    sstr_t t4 = sstrtrim(sstr((char*)"xyz "));
    sstr_t t5 = sstrtrim(sstr((char*)"   "));
    sstr_t empty = sstrtrim(sstr((char*)""));
    UCX_TEST_BEGIN
    UCX_TEST_ASSERT(strncmp(t1.ptr, "ein test", t1.length) == 0, "failed");
    UCX_TEST_ASSERT(strncmp(t2.ptr, "abc", t2.length) == 0, "failed");
    UCX_TEST_ASSERT(strncmp(t3.ptr, "123", t3.length) == 0, "failed");
    UCX_TEST_ASSERT(strncmp(t4.ptr, "xyz", t4.length) == 0, "failed");
    UCX_TEST_ASSERT(t5.length == 0, "string t5 not empty");
    UCX_TEST_ASSERT(empty.length == 0, "empty string failed");
    UCX_TEST_END
}

UCX_TEST(test_sstrprefixsuffix) {
    sstr_t str = ST("test my prefix and my suffix");
    sstr_t empty = ST("");
    
    UCX_TEST_BEGIN
    
    UCX_TEST_ASSERT(!sstrprefix(empty, S("pref")), "prefix empty string fails");
    UCX_TEST_ASSERT(!sstrsuffix(empty, S("suf")), "suffix empty string fails");
    
    UCX_TEST_ASSERT(sstrprefix(str, empty), "empty prefix fails");
    UCX_TEST_ASSERT(sstrsuffix(str, empty), "empty suffix fails");
    
    UCX_TEST_ASSERT(sstrprefix(empty, empty), "string and prefix empty fails");
    UCX_TEST_ASSERT(sstrsuffix(empty, empty), "string and suffix empty fails");
    
    UCX_TEST_ASSERT(sstrprefix(str, S("test ")), "prefix false negative");
    UCX_TEST_ASSERT(!sstrprefix(str, S("8-) fsck ")), "prefix false positive");
    
    UCX_TEST_ASSERT(sstrsuffix(str, S("fix")), "suffix false negative");
    UCX_TEST_ASSERT(!sstrsuffix(str, S("fox")), "suffix false positive");

    
    UCX_TEST_END
}

UCX_TEST(test_sstrcaseprefixsuffix) {
    sstr_t str = ST("test my prefix and my suffix");
    sstr_t empty = ST("");
    
    UCX_TEST_BEGIN
    
    UCX_TEST_ASSERT(!sstrcaseprefix(empty, S("pREf")), "prefix empty string fails");
    UCX_TEST_ASSERT(!sstrcasesuffix(empty, S("sUf")), "suffix empty string fails");
    
    UCX_TEST_ASSERT(sstrcaseprefix(str, empty), "empty prefix fails");
    UCX_TEST_ASSERT(sstrcasesuffix(str, empty), "empty suffix fails");
    
    UCX_TEST_ASSERT(sstrcaseprefix(empty, empty), "string and prefix empty fails");
    UCX_TEST_ASSERT(sstrcasesuffix(empty, empty), "string and suffix empty fails");
    
    UCX_TEST_ASSERT(sstrcaseprefix(str, S("TEST ")), "prefix false negative");
    UCX_TEST_ASSERT(!sstrcaseprefix(str, S("8-) fsck ")), "prefix false positive");
    
    UCX_TEST_ASSERT(sstrcasesuffix(str, S("FIX")), "suffix false negative");
    UCX_TEST_ASSERT(!sstrcasesuffix(str, S("fox")), "suffix false positive");
    
    UCX_TEST_END
}

UCX_TEST(test_sstrreplace) {

    sstr_t str = ST("test ababab string aba");
    sstr_t longstr = ST("xyaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaacd");
    sstr_t notrail = ST("test abab");
    sstr_t empty = ST("");
    sstr_t astr = ST("aaaaaaaaaa");
    sstr_t csstr = ST("test AB ab TEST xyz");

    sstr_t repl = sstrreplace(str, SC("abab"), SC("muchlonger"));
    sstr_t expected = ST("test muchlongerab string aba");

    sstr_t repln = sstrreplacen(str, SC("ab"), SC("c"), 2);
    sstr_t expectedn = ST("test ccab string aba");

    sstr_t longrepl = sstrreplace(longstr, SC("a"), SC("z"));
    sstr_t longexpect = ST("xyzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzcd");

    sstr_t replnotrail = sstrreplace(notrail, SC("ab"), SC("z"));
    sstr_t notrailexpect = ST("test zz");
    
    sstr_t repleq = sstrreplace(str, str, SC("hello"));
    sstr_t eqexpect = ST("hello");
    
    sstr_t replempty1 = sstrreplace(empty, SC("ab"), SC("c")); // expect: empty
    sstr_t replempty2 = sstrreplace(str, SC("abab"), empty);
    sstr_t emptyexpect2 = ST("test ab string aba");
    
    sstr_t replpre = sstrreplace(str, SC("test "), SC("TEST "));
    sstr_t preexpected = ST("TEST ababab string aba");
    
    sstr_t replan1 = sstrreplacen(astr, SC("a"), SC("x"), 1);
    sstr_t an1expected = ST("xaaaaaaaaa");
    
    sstr_t replan4 = sstrreplacen(astr, SC("a"), SC("x"), 4);
    sstr_t an4expected = ST("xxxxaaaaaa");
    
    sstr_t replan9 = sstrreplacen(astr, SC("a"), SC("x"), 9);
    sstr_t an9expected = ST("xxxxxxxxxa");
    
    sstr_t replan10 = sstrreplacen(astr, SC("a"), SC("x"), 10);
    sstr_t an10expected = ST("xxxxxxxxxx");
    
    sstr_t replcs1 = sstrreplace(csstr, SC("AB"), SC("*"));
    sstr_t cs1expected = ST("test * ab TEST xyz");
    
    sstr_t replcs2 = sstrreplace(csstr, SC("test"), SC("TEST"));
    sstr_t cs2expected = ST("TEST AB ab TEST xyz");
    
    UCX_TEST_BEGIN

    UCX_TEST_ASSERT(repl.ptr != str.ptr, "result string is not fresh");
    UCX_TEST_ASSERT(!sstrcmp(repl, expected), "incorrect replacement");

    UCX_TEST_ASSERT(repln.ptr != str.ptr, "result string is not fresh");
    UCX_TEST_ASSERT(!sstrcmp(repln, expectedn), "incorrect replacement");

    UCX_TEST_ASSERT(!sstrcmp(longrepl, longexpect),
            "incorrect handling of long strings");

    UCX_TEST_ASSERT(!sstrcmp(replnotrail, notrailexpect),
            "no trail replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(repleq, eqexpect),
            "equal replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replempty1, empty),
            "replacement in empty string fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replempty2, emptyexpect2),
            "empty replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replpre, preexpected),
            "prefix replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replan1, an1expected),
            "a1 replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replan4, an4expected),
            "a4 replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replan9, an9expected),
            "a9 replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replan10, an10expected),
            "a10 replacement fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replcs1, cs1expected),
            "case sensitivity test1 fails");
    
    UCX_TEST_ASSERT(!sstrcmp(replcs2, cs2expected),
            "case sensitivity test2 fails");

    UCX_TEST_END

    free(repl.ptr);
    free(repln.ptr);
    free(longrepl.ptr);
    free(replnotrail.ptr);
    free(repleq.ptr);
    if(replempty1.ptr) free(replempty1.ptr);
    free(replempty2.ptr);
    free(replpre.ptr);
    free(replan1.ptr);
    free(replan4.ptr);
    free(replan9.ptr);
    free(replan10.ptr);
    free(replcs1.ptr);
    free(replcs2.ptr);
}