path: root/api_test/main.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define CMARK_NO_SHORT_NAMES
#include "cmark.h"
#include "node.h"

#include "harness.h"
#include "cplusplus.h"

#define UTF8_REPL "\xEF\xBF\xBD"

static const cmark_node_type node_types[] = {
    CMARK_NODE_DOCUMENT,
    CMARK_NODE_BLOCK_QUOTE,
    CMARK_NODE_LIST,
    CMARK_NODE_ITEM,
    CMARK_NODE_CODE_BLOCK,
    CMARK_NODE_HTML,
    CMARK_NODE_PARAGRAPH,
    CMARK_NODE_HEADER,
    CMARK_NODE_HRULE,
    CMARK_NODE_TEXT,
    CMARK_NODE_SOFTBREAK,
    CMARK_NODE_LINEBREAK,
    CMARK_NODE_CODE,
    CMARK_NODE_INLINE_HTML,
    CMARK_NODE_EMPH,
    CMARK_NODE_STRONG,
    CMARK_NODE_LINK,
    CMARK_NODE_IMAGE
};
static const int num_node_types = sizeof(node_types) / sizeof(*node_types);

static void
test_md_to_html(test_batch_runner *runner, const char *markdown,
        const char *expected_html, const char *msg);

static void
test_content(test_batch_runner *runner, cmark_node_type type,
         int allowed_content);

static void
test_char(test_batch_runner *runner, int valid, const char *utf8,
      const char *msg);

static void
test_incomplete_char(test_batch_runner *runner, const char *utf8,
             const char *msg);

static void
test_continuation_byte(test_batch_runner *runner, const char *utf8);

static void
constructor(test_batch_runner *runner)
{
    for (int i = 0; i < num_node_types; ++i) {
        cmark_node_type type = node_types[i];
        cmark_node *node = cmark_node_new(type);
        OK(runner, node != NULL, "new type %d", type);
        INT_EQ(runner, cmark_node_get_type(node), type,
               "get_type %d", type);

        switch (node->type) {
        case CMARK_NODE_HEADER:
            INT_EQ(runner, cmark_node_get_header_level(node), 1,
                   "default header level is 1");
            node->as.header.level = 1;
            break;

        case CMARK_NODE_LIST:
            INT_EQ(runner, cmark_node_get_list_type(node),
                   CMARK_BULLET_LIST,
                   "default is list type is bullet");
            INT_EQ(runner, cmark_node_get_list_delim(node),
                   CMARK_NO_DELIM,
                   "default is list delim is NO_DELIM");
            INT_EQ(runner, cmark_node_get_list_start(node), 1,
                   "default is list start is 1");
            INT_EQ(runner, cmark_node_get_list_tight(node), 0,
                   "default is list is loose");
            break;

        default:
            break;
        }

        cmark_node_free(node);
    }
}

static void
accessors(test_batch_runner *runner)
{
    static const char markdown[] =
        "## Header\n"
        "\n"
        "* Item 1\n"
        "* Item 2\n"
        "\n"
        "2. Item 1\n"
        "\n"
        "3. Item 2\n"
        "\n"
        "\n"
        "    code\n"
        "\n"
        "``` lang\n"
        "fenced\n"
        "```\n"
        "\n"
        "<div>html</div>\n"
        "\n"
        "[link](url 'title')\n";

    cmark_node *doc = cmark_parse_document(markdown, sizeof(markdown) - 1);

    // Getters

    cmark_node *header = cmark_node_first_child(doc);
    INT_EQ(runner, cmark_node_get_header_level(header), 2,
           "get_header_level");

    cmark_node *bullet_list = cmark_node_next(header);
    INT_EQ(runner, cmark_node_get_list_type(bullet_list),
           CMARK_BULLET_LIST, "get_list_type bullet");
    INT_EQ(runner, cmark_node_get_list_tight(bullet_list), 1,
           "get_list_tight tight");

    cmark_node *ordered_list = cmark_node_next(bullet_list);
    INT_EQ(runner, cmark_node_get_list_type(ordered_list),
           CMARK_ORDERED_LIST, "get_list_type ordered");
    INT_EQ(runner, cmark_node_get_list_delim(ordered_list),
           CMARK_PERIOD_DELIM, "get_list_delim ordered");
    INT_EQ(runner, cmark_node_get_list_start(ordered_list), 2,
           "get_list_start");
    INT_EQ(runner, cmark_node_get_list_tight(ordered_list), 0,
           "get_list_tight loose");

    cmark_node *code = cmark_node_next(ordered_list);
    STR_EQ(runner, cmark_node_get_literal(code), "code\n",
           "get_literal indented code");

    cmark_node *fenced = cmark_node_next(code);
    STR_EQ(runner, cmark_node_get_literal(fenced), "fenced\n",
           "get_literal fenced code");
    STR_EQ(runner, cmark_node_get_fence_info(fenced), "lang",
           "get_fence_info");

    cmark_node *html = cmark_node_next(fenced);
    STR_EQ(runner, cmark_node_get_literal(html),
           "<div>html</div>\n", "get_literal html");

    cmark_node *paragraph = cmark_node_next(html);
    INT_EQ(runner, cmark_node_get_start_line(paragraph), 19,
           "get_start_line");
    INT_EQ(runner, cmark_node_get_start_column(paragraph), 1,
           "get_start_column");
    INT_EQ(runner, cmark_node_get_end_line(paragraph), 19,
           "get_end_line");

    cmark_node *link = cmark_node_first_child(paragraph);
    STR_EQ(runner, cmark_node_get_url(link), "url",
           "get_url");
    STR_EQ(runner, cmark_node_get_title(link), "title",
           "get_title");

    cmark_node *string = cmark_node_first_child(link);
    STR_EQ(runner, cmark_node_get_literal(string), "link",
           "get_literal string");

    // Setters

    OK(runner, cmark_node_set_header_level(header, 3),
       "set_header_level");

    OK(runner, cmark_node_set_list_type(bullet_list, CMARK_ORDERED_LIST),
       "set_list_type ordered");
    OK(runner, cmark_node_set_list_delim(bullet_list, CMARK_PAREN_DELIM),
       "set_list_delim paren");
    OK(runner, cmark_node_set_list_start(bullet_list, 3),
       "set_list_start");
    OK(runner, cmark_node_set_list_tight(bullet_list, 0),
       "set_list_tight loose");

    OK(runner, cmark_node_set_list_type(ordered_list, CMARK_BULLET_LIST),
       "set_list_type bullet");
    OK(runner, cmark_node_set_list_tight(ordered_list, 1),
       "set_list_tight tight");

    OK(runner, cmark_node_set_literal(code, "CODE\n"),
       "set_literal indented code");

    OK(runner, cmark_node_set_literal(fenced, "FENCED\n"),
       "set_literal fenced code");
    OK(runner, cmark_node_set_fence_info(fenced, "LANG"),
       "set_fence_info");

    OK(runner, cmark_node_set_literal(html, "<div>HTML</div>\n"),
       "set_literal html");

    OK(runner, cmark_node_set_url(link, "URL"),
       "set_url");
    OK(runner, cmark_node_set_title(link, "TITLE"),
       "set_title");

    OK(runner, cmark_node_set_literal(string, "LINK"),
       "set_literal string");

    char *rendered_html = cmark_render_html(doc, CMARK_OPT_DEFAULT);
    static const char expected_html[] =
        "<h3>Header</h3>\n"
        "<ol start=\"3\">\n"
        "<li>\n"
        "<p>Item 1</p>\n"
        "</li>\n"
        "<li>\n"
        "<p>Item 2</p>\n"
        "</li>\n"
        "</ol>\n"
        "<ul>\n"
        "<li>Item 1</li>\n"
        "<li>Item 2</li>\n"
        "</ul>\n"
        "<pre><code>CODE\n"
        "</code></pre>\n"
        "<pre><code class=\"language-LANG\">FENCED\n"
        "</code></pre>\n"
        "<div>HTML</div>\n"
        "<p><a href=\"URL\" title=\"TITLE\">LINK</a></p>\n";
    STR_EQ(runner, rendered_html, expected_html, "setters work");
    free(rendered_html);

    // Getter errors

    INT_EQ(runner, cmark_node_get_header_level(bullet_list), 0,
           "get_header_level error");
    INT_EQ(runner, cmark_node_get_list_type(header), CMARK_NO_LIST,
           "get_list_type error");
    INT_EQ(runner, cmark_node_get_list_start(code), 0,
           "get_list_start error");
    INT_EQ(runner, cmark_node_get_list_tight(fenced), 0,
           "get_list_tight error");
    OK(runner, cmark_node_get_literal(ordered_list) == NULL,
       "get_literal error");
    OK(runner, cmark_node_get_fence_info(paragraph) == NULL,
       "get_fence_info error");
    OK(runner, cmark_node_get_url(html) == NULL,
       "get_url error");
    OK(runner, cmark_node_get_title(header) == NULL,
       "get_title error");

    // Setter errors

    OK(runner, !cmark_node_set_header_level(bullet_list, 3),
       "set_header_level error");
    OK(runner, !cmark_node_set_list_type(header, CMARK_ORDERED_LIST),
       "set_list_type error");
    OK(runner, !cmark_node_set_list_start(code, 3),
       "set_list_start error");
    OK(runner, !cmark_node_set_list_tight(fenced, 0),
       "set_list_tight error");
    OK(runner, !cmark_node_set_literal(ordered_list, "content\n"),
       "set_literal error");
    OK(runner, !cmark_node_set_fence_info(paragraph, "lang"),
       "set_fence_info error");
    OK(runner, !cmark_node_set_url(html, "url"),
       "set_url error");
    OK(runner, !cmark_node_set_title(header, "title"),
       "set_title error");

    OK(runner, !cmark_node_set_header_level(header, 0),
       "set_header_level too small");
    OK(runner, !cmark_node_set_header_level(header, 7),
       "set_header_level too large");
    OK(runner, !cmark_node_set_list_type(bullet_list, CMARK_NO_LIST),
       "set_list_type invalid");
    OK(runner, !cmark_node_set_list_start(bullet_list, -1),
       "set_list_start negative");

    cmark_node_free(doc);
}

static void
node_check(test_batch_runner *runner) {
    // Construct an incomplete tree.
    cmark_node *doc = cmark_node_new(CMARK_NODE_DOCUMENT);
    cmark_node *p1  = cmark_node_new(CMARK_NODE_PARAGRAPH);
    cmark_node *p2  = cmark_node_new(CMARK_NODE_PARAGRAPH);
    doc->first_child = p1;
    p1->next = p2;

    INT_EQ(runner, cmark_node_check(doc, NULL), 4, "node_check works");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0,
           "node_check fixes tree");

    cmark_node_free(doc);
}

static void
iterator(test_batch_runner *runner) {
    cmark_node *doc = cmark_parse_document("> a *b*\n\nc", 10);
    int parnodes = 0;
    cmark_event_type ev_type;
    cmark_iter *iter = cmark_iter_new(doc);
    cmark_node *cur;

    while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
        cur = cmark_iter_get_node(iter);
        if (cur->type == CMARK_NODE_PARAGRAPH &&
            ev_type == CMARK_EVENT_ENTER) {
            parnodes += 1;
        }
    }
    INT_EQ(runner, parnodes, 2, "iterate correctly counts paragraphs");

    cmark_iter_free(iter);
    cmark_node_free(doc);
}

static void
iterator_delete(test_batch_runner *runner) {
    static const char md[] =
        "a *b* c\n"
        "\n"
        "* item1\n"
        "* item2\n"
        "\n"
        "a `b` c\n"
        "\n"
        "* item1\n"
        "* item2\n";
    cmark_node *doc  = cmark_parse_document(md, sizeof(md) - 1);
    cmark_iter *iter = cmark_iter_new(doc);
    cmark_event_type ev_type;

    while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
        cmark_node *node = cmark_iter_get_node(iter);
        // Delete list, emph, and code nodes.
        if ((ev_type == CMARK_EVENT_EXIT &&
             node->type == CMARK_NODE_LIST) ||
            (ev_type == CMARK_EVENT_EXIT &&
             node->type == CMARK_NODE_EMPH) ||
            (ev_type == CMARK_EVENT_ENTER &&
             node->type == CMARK_NODE_CODE)) {
            cmark_node_free(node);
        }
    }

    char *html = cmark_render_html(doc, CMARK_OPT_DEFAULT);
    static const char expected[] =
        "<p>a  c</p>\n"
        "<p>a  c</p>\n";
    STR_EQ(runner, html, expected, "iterate and delete nodes");

    free(html);
    cmark_iter_free(iter);
    cmark_node_free(doc);
}

static void
create_tree(test_batch_runner *runner)
{
    char *html;
    cmark_node *doc = cmark_node_new(CMARK_NODE_DOCUMENT);

    cmark_node *p = cmark_node_new(CMARK_NODE_PARAGRAPH);
    OK(runner, !cmark_node_insert_before(doc, p),
       "insert before root fails");
    OK(runner, !cmark_node_insert_after(doc, p),
       "insert after root fails");
    OK(runner, cmark_node_append_child(doc, p), "append1");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0, "append1 consistent");
    OK(runner, cmark_node_parent(p) == doc, "node_parent");

    cmark_node *emph = cmark_node_new(CMARK_NODE_EMPH);
    OK(runner, cmark_node_prepend_child(p, emph), "prepend1");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0, "prepend1 consistent");

    cmark_node *str1 = cmark_node_new(CMARK_NODE_TEXT);
    cmark_node_set_literal(str1, "Hello, ");
    OK(runner, cmark_node_prepend_child(p, str1), "prepend2");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0, "prepend2 consistent");

    cmark_node *str3 = cmark_node_new(CMARK_NODE_TEXT);
    cmark_node_set_literal(str3, "!");
    OK(runner, cmark_node_append_child(p, str3), "append2");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0, "append2 consistent");

    cmark_node *str2 = cmark_node_new(CMARK_NODE_TEXT);
    cmark_node_set_literal(str2, "world");
    OK(runner, cmark_node_append_child(emph, str2), "append3");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0, "append3 consistent");

    html = cmark_render_html(doc, CMARK_OPT_DEFAULT);
    STR_EQ(runner, html, "<p>Hello, <em>world</em>!</p>\n",
           "render_html");
    free(html);

    OK(runner, cmark_node_insert_before(str1, str3), "ins before1");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0,
           "ins before1 consistent");
    // 31e
    OK(runner, cmark_node_first_child(p) == str3, "ins before1 works");

    OK(runner, cmark_node_insert_before(str1, emph), "ins before2");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0,
           "ins before2 consistent");
    // 3e1
    OK(runner, cmark_node_last_child(p) == str1, "ins before2 works");

    OK(runner, cmark_node_insert_after(str1, str3), "ins after1");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0,
           "ins after1 consistent");
    // e13
    OK(runner, cmark_node_next(str1) == str3, "ins after1 works");

    OK(runner, cmark_node_insert_after(str1, emph), "ins after2");
    INT_EQ(runner, cmark_node_check(doc, NULL), 0,
           "ins after2 consistent");
    // 1e3
    OK(runner, cmark_node_previous(emph) == str1, "ins after2 works");

    cmark_node_unlink(emph);

    html = cmark_render_html(doc, CMARK_OPT_DEFAULT);
    STR_EQ(runner, html, "<p>Hello, !</p>\n",
           "render_html after shuffling");
    free(html);

    cmark_node_free(doc);

    // TODO: Test that the contents of an unlinked inline are valid
    // after the parent block was destroyed. This doesn't work so far.
    cmark_node_free(emph);
}

void
hierarchy(test_batch_runner *runner)
{
    cmark_node *bquote1 = cmark_node_new(CMARK_NODE_BLOCK_QUOTE);
    cmark_node *bquote2 = cmark_node_new(CMARK_NODE_BLOCK_QUOTE);
    cmark_node *bquote3 = cmark_node_new(CMARK_NODE_BLOCK_QUOTE);

    OK(runner, cmark_node_append_child(bquote1, bquote2),
       "append bquote2");
    OK(runner, cmark_node_append_child(bquote2, bquote3),
       "append bquote3");
    OK(runner, !cmark_node_append_child(bquote3, bquote3),
       "adding a node as child of itself fails");
    OK(runner, !cmark_node_append_child(bquote3, bquote1),
       "adding a parent as child fails");

    cmark_node_free(bquote1);

    int max_node_type = CMARK_NODE_LAST_BLOCK > CMARK_NODE_LAST_INLINE
                ? CMARK_NODE_LAST_BLOCK : CMARK_NODE_LAST_INLINE;
    OK(runner, max_node_type < 32, "all node types < 32");

    int list_item_flag = 1 << CMARK_NODE_ITEM;
    int top_level_blocks =
        (1 << CMARK_NODE_BLOCK_QUOTE) |
        (1 << CMARK_NODE_LIST) |
        (1 << CMARK_NODE_CODE_BLOCK) |
        (1 << CMARK_NODE_HTML) |
        (1 << CMARK_NODE_PARAGRAPH) |
        (1 << CMARK_NODE_HEADER) |
        (1 << CMARK_NODE_HRULE);
    int all_inlines =
        (1 << CMARK_NODE_TEXT) |
        (1 << CMARK_NODE_SOFTBREAK) |
        (1 << CMARK_NODE_LINEBREAK) |
        (1 << CMARK_NODE_CODE) |
        (1 << CMARK_NODE_INLINE_HTML) |
        (1 << CMARK_NODE_EMPH) |
        (1 << CMARK_NODE_STRONG) |
        (1 << CMARK_NODE_LINK) |
        (1 << CMARK_NODE_IMAGE);

    test_content(runner, CMARK_NODE_DOCUMENT,      top_level_blocks);
    test_content(runner, CMARK_NODE_BLOCK_QUOTE,   top_level_blocks);
    test_content(runner, CMARK_NODE_LIST,          list_item_flag);
    test_content(runner, CMARK_NODE_ITEM,          top_level_blocks);
    test_content(runner, CMARK_NODE_CODE_BLOCK ,   0);
    test_content(runner, CMARK_NODE_HTML,          0);
    test_content(runner, CMARK_NODE_PARAGRAPH,     all_inlines);
    test_content(runner, CMARK_NODE_HEADER,        all_inlines);
    test_content(runner, CMARK_NODE_HRULE,         0);
    test_content(runner, CMARK_NODE_TEXT,          0);
    test_content(runner, CMARK_NODE_SOFTBREAK,     0);
    test_content(runner, CMARK_NODE_LINEBREAK,     0);
    test_content(runner, CMARK_NODE_CODE,   0);
    test_content(runner, CMARK_NODE_INLINE_HTML,   0);
    test_content(runner, CMARK_NODE_EMPH,          all_inlines);
    test_content(runner, CMARK_NODE_STRONG,        all_inlines);
    test_content(runner, CMARK_NODE_LINK,          all_inlines);
    test_content(runner, CMARK_NODE_IMAGE,         all_inlines);
}

static void
test_content(test_batch_runner *runner, cmark_node_type type,
         int allowed_content)
{
    cmark_node *node = cmark_node_new(type);

    for (int i = 0; i < num_node_types; ++i) {
        cmark_node_type child_type = node_types[i];
        cmark_node *child = cmark_node_new(child_type);

        int got = cmark_node_append_child(node, child);
        int expected = (allowed_content >> child_type) & 1;

        INT_EQ(runner, got, expected,
               "add %d as child of %d", child_type, type);

        cmark_node_free(child);
    }

    cmark_node_free(node);
}

static void
parser(test_batch_runner *runner)
{
    test_md_to_html(runner, "No newline", "<p>No newline</p>\n",
            "document without trailing newline");
}

static void
render_html(test_batch_runner *runner)
{
    char *html;

    static const char markdown[] =
        "foo *bar*\n"
        "\n"
        "paragraph 2\n";
    cmark_node *doc = cmark_parse_document(markdown, sizeof(markdown) - 1);

    cmark_node *paragraph = cmark_node_first_child(doc);
    html = cmark_render_html(paragraph, CMARK_OPT_DEFAULT);
    STR_EQ(runner, html, "<p>foo <em>bar</em></p>\n",
           "render single paragraph");
    free(html);

    cmark_node *string = cmark_node_first_child(paragraph);
    html = cmark_render_html(string, CMARK_OPT_DEFAULT);
    STR_EQ(runner, html, "foo ", "render single inline");
    free(html);

    cmark_node *emph = cmark_node_next(string);
    html = cmark_render_html(emph, CMARK_OPT_DEFAULT);
    STR_EQ(runner, html, "<em>bar</em>", "render inline with children");
    free(html);

    cmark_node_free(doc);
}

static void
utf8(test_batch_runner *runner)
{
    // Ranges
    test_char(runner, 1, "\x01", "valid utf8 01");
    test_char(runner, 1, "\x7F", "valid utf8 7F");
    test_char(runner, 0, "\x80", "invalid utf8 80");
    test_char(runner, 0, "\xBF", "invalid utf8 BF");
    test_char(runner, 0, "\xC0\x80", "invalid utf8 C080");
    test_char(runner, 0, "\xC1\xBF", "invalid utf8 C1BF");
    test_char(runner, 1, "\xC2\x80", "valid utf8 C280");
    test_char(runner, 1, "\xDF\xBF", "valid utf8 DFBF");
    test_char(runner, 0, "\xE0\x80\x80", "invalid utf8 E08080");
    test_char(runner, 0, "\xE0\x9F\xBF", "invalid utf8 E09FBF");
    test_char(runner, 1, "\xE0\xA0\x80", "valid utf8 E0A080");
    test_char(runner, 1, "\xED\x9F\xBF", "valid utf8 ED9FBF");
    test_char(runner, 0, "\xED\xA0\x80", "invalid utf8 EDA080");
    test_char(runner, 0, "\xED\xBF\xBF", "invalid utf8 EDBFBF");
    test_char(runner, 0, "\xF0\x80\x80\x80", "invalid utf8 F0808080");
    test_char(runner, 0, "\xF0\x8F\xBF\xBF", "invalid utf8 F08FBFBF");
    test_char(runner, 1, "\xF0\x90\x80\x80", "valid utf8 F0908080");
    test_char(runner, 1, "\xF4\x8F\xBF\xBF", "valid utf8 F48FBFBF");
    test_char(runner, 0, "\xF4\x90\x80\x80", "invalid utf8 F4908080");
    test_char(runner, 0, "\xF7\xBF\xBF\xBF", "invalid utf8 F7BFBFBF");
    test_char(runner, 0, "\xF8", "invalid utf8 F8");
    test_char(runner, 0, "\xFF", "invalid utf8 FF");

    // Incomplete byte sequences at end of input
    test_incomplete_char(runner, "\xE0\xA0", "invalid utf8 E0A0");
    test_incomplete_char(runner, "\xF0\x90\x80", "invalid utf8 F09080");

    // Invalid continuation bytes
    test_continuation_byte(runner, "\xC2\x80");
    test_continuation_byte(runner, "\xE0\xA0\x80");
    test_continuation_byte(runner, "\xF0\x90\x80\x80");

    // Test string containing null character
    static const char string_with_null[] = "((((\0))))";
    char *html = cmark_markdown_to_html(string_with_null,
                        sizeof(string_with_null) - 1);
    STR_EQ(runner, html, "<p>((((" UTF8_REPL "))))</p>\n",
           "utf8 with U+0000");
    free(html);
}

static void
test_char(test_batch_runner *runner, int valid, const char *utf8,
      const char *msg)
{
    char buf[20];
    sprintf(buf, "((((%s))))", utf8);

    if (valid) {
        char expected[30];
        sprintf(expected, "<p>((((%s))))</p>\n", utf8);
        test_md_to_html(runner, buf, expected, msg);
    }
    else {
        test_md_to_html(runner, buf, "<p>((((" UTF8_REPL "))))</p>\n",
                msg);
    }
}

static void
test_incomplete_char(test_batch_runner *runner, const char *utf8,
             const char *msg)
{
    char buf[20];
    sprintf(buf, "----%s", utf8);
    test_md_to_html(runner, buf, "<p>----" UTF8_REPL "</p>\n", msg);
}

static void
test_continuation_byte(test_batch_runner *runner, const char *utf8)
{
    int len = strlen(utf8);

    for (int pos = 1; pos < len; ++pos) {
        char buf[20];
        sprintf(buf, "((((%s))))", utf8);
        buf[4+pos] = '\x20';

        char expected[50];
        strcpy(expected, "<p>((((" UTF8_REPL "\x20");
        for (int i = pos + 1; i < len; ++i) {
            strcat(expected, UTF8_REPL);
        }
        strcat(expected, "))))</p>\n");

        char *html = cmark_markdown_to_html(buf, strlen(buf));
        STR_EQ(runner, html, expected,
               "invalid utf8 continuation byte %d/%d", pos, len);
        free(html);
    }
}

static void
test_md_to_html(test_batch_runner *runner, const char *markdown,
        const char *expected_html, const char *msg)
{
    char *html = cmark_markdown_to_html(markdown, strlen(markdown));
    STR_EQ(runner, html, expected_html, msg);
    free(html);
}

int main() {
    int retval;
    test_batch_runner *runner = test_batch_runner_new();

    constructor(runner);
    accessors(runner);
    node_check(runner);
    iterator(runner);
    iterator_delete(runner);
    create_tree(runner);
    hierarchy(runner);
    parser(runner);
    render_html(runner);
    utf8(runner);
    test_cplusplus(runner);

    test_print_summary(runner);
    retval =  test_ok(runner) ? 0 : 1;
    free(runner);

    return retval;
}