markdown.qh

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#include "test.qh"

ERASEABLE
string markdown(string s)
{
    string buf = "";
    int lines = 0;
    int spaces = 0;
    FOREACH_CHAR(s, true, {
        switch (it) {
            default:
                for (; spaces > 0; --spaces) {
                    buf = strcat(buf, " ");
                }
                buf = strcat(buf, chr2str(it));
                break;
            case ' ':
                spaces += 1;
                break;
            case '\n':
                lines += 1;
                if (lines > 1) {
                    lines = 0;
                    spaces = 0;
                    buf = strcat(buf, "\n\n");
                    break;
                }
                if (spaces < 2) {
                    spaces = 1;
                } else {
                    spaces = 0;
                    buf = strcat(buf, "\n");
                }
                break;
        }
    });
    return buf;
}
 
TEST(Markdown, LineWrap)
{
    #define X(expect, in) MACRO_BEGIN \
        string out = markdown(in); \
        EXPECT_TRUE(expect == out); \
        LOG_INFO(expect); \
        LOG_INFO(out); \
    MACRO_END
 
    // identity
    X("lorem ipsum", "lorem ipsum");
    // trim trailing space
    X("lorem ipsum", "lorem ipsum ");
    // allow manual input wrapping
    X("lorem ipsum", "lorem\nipsum");
    // line break
    X("lorem\nipsum", "lorem  \nipsum");
    // paragraph
    X("lorem\n\nipsum", "lorem\n\nipsum");
    SUCCEED();
    #undef X
}