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testmmd.c
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//
// Unit test program for Mini Markdown library.
//
// https://www.msweet.org/mmd
//
// Usage:
//
// ./testmmd [--ext {all,none}] [--help] [--only-body] [--spec]
// [-o filename.html] filename.md
//
// Copyright © 2017-2024 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#include "mmd.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
//
// Local globals...
//
static bool spec_mode = false;
// Output HTML according to the CommonMark spec
//
// Local functions...
//
static void add_spec_text(char *dst, const char *src, size_t dstsize);
static void indent_puts(FILE *logfile, const char *text, int cursor);
static int is_equal(const char *generated, const char *expected, int *failed_at);
static const char *make_anchor(const char *text);
static int run_spec(const char *filename, FILE *logfile);
static void usage(void);
static void write_block(FILE *fp, mmd_t *parent);
static void write_html(FILE *fp, const char *s);
static void write_leaf(FILE *fp, mmd_t *node);
//
// 'main()' - Main entry for unit test program.
//
int // O - Exit status
main(int argc, // I - Number of command-line arguments
char *argv[]) // I - Command-line arguments
{
int i; // Looping var
int only_body = 0; // Only output body content?
FILE *fp = stdout; // Output file
const char *filename = NULL; // File to load
mmd_t *doc; // Document
const char *title; // Title
for (i = 1; i < argc; i ++)
{
if (!strcmp(argv[i], "--ext"))
{
i ++;
if (i >= argc)
{
usage();
return (1);
}
if (!strcmp(argv[i], "all"))
{
mmdSetOptions(MMD_OPTION_ALL);
}
else if (!strcmp(argv[i], "none"))
{
mmdSetOptions(MMD_OPTION_NONE);
}
else
{
usage();
return (1);
}
}
else if (!strcmp(argv[i], "--help"))
{
usage();
return (0);
}
else if (!strcmp(argv[i], "--only-body"))
{
only_body = 1;
}
else if (!strcmp(argv[i], "-o"))
{
i ++;
if (i >= argc)
{
usage();
return (1);
}
if ((fp = fopen(argv[i], "w")) == NULL)
{
perror(argv[i]);
return (1);
}
}
else if (!strcmp(argv[i], "--spec"))
{
spec_mode = true;
}
else if (argv[i][0] == '-')
{
printf("Unknown option '%s'.\n", argv[i]);
usage();
return (1);
}
else if (filename)
{
usage();
return (1);
}
else
filename = argv[i];
}
if (spec_mode)
return (run_spec(filename, fp));
else if (filename)
doc = mmdLoad(NULL, filename);
else
doc = mmdLoadFile(NULL, stdin);
if (!doc)
{
perror(filename ? filename : "(stdin)");
return (1);
}
title = mmdGetMetadata(doc, "title");
if (!only_body)
{
fputs("<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
"<title>", fp);
write_html(fp, title ? title : "Unknown");
fputs("</title>\n"
"<style><!--\n"
"body {\n"
" font-family: sans-serif;\n"
" font-size: 18px;\n"
" line-height: 150%;\n"
"}\n"
"a {\n"
" font: inherit;\n"
"}\n"
"pre, li code, p code {\n"
" font-family: monospace;\n"
"}\n"
"pre {\n"
" background: #f8f8f8;\n"
" border: solid thin #666;\n"
" line-height: 120%;\n"
" padding: 10px;\n"
"}\n"
"li code, p code {\n"
" padding: 2px 5px;\n"
"}\n"
"table {\n"
" border: solid thin #999;\n"
" border-collapse: collapse;\n"
" border-spacing: 0;\n"
"}\n"
"td {\n"
" border: solid thin #ccc;\n"
" padding-top: 5px;\n"
"}\n"
"td.left {\n"
" text-align: left;\n"
"}\n"
"td.center {\n"
" text-align: center;\n"
"}\n"
"td.right {\n"
" text-align: right;\n"
"}\n"
"th {\n"
" background: #ccc;\n"
" border: none;\n"
" border-bottom: solid thin #999;\n"
" padding: 1px 5px;\n"
" text-align: center;\n"
"}\n"
"--></style>\n"
"</head>\n"
"<body>\n", fp);
}
write_block(fp, doc);
if (!only_body)
{
fputs("</body>\n"
"</html>\n", fp);
}
if (fp != stdout)
fclose(fp);
mmdFree(doc);
return (0);
}
//
// 'add_spec_text()' - Add text from a specification file, substituting
// placeholders as needed.
//
static void
add_spec_text(char *dst, // I - Destination buffer
const char *src, // I - Source string
size_t dstsize) // I - Size of destination buffer
{
int col = 0, // Current column
in_html = 0; // Inside a HTML element?
char *dstend = dst + dstsize - 1; // End of destination buffer
while (*src && dst < dstend)
{
if (!memcmp(src, "\342\206\222", 3))
{
src += 3;
do
{
*dst++ = ' ';
col ++;
}
while ((col & 3) && dst < dstend);
}
else
{
if (*src == '<')
{
in_html = 1;
}
else if (*src == '>')
{
if (in_html)
in_html = 0;
else
col ++;
}
else if (!in_html && (!(*src & 0x80) || (*src & 0xc0) != 0x80))
{
col ++;
}
*dst++ = *src++;
}
}
*dst = '\0';
}
//
// 'indent_puts()' - Write a string to the standard output, indenting each line
// by 8 spaces.
//
static void
indent_puts(FILE *logfile, // I - Log file
const char *text, // I - Text to write
int cursor) // I - Location for cursor or -1 if none
{
const char *start, // Start of line
*end; // End of line
for (start = text; *start; start = end)
{
if ((end = strchr(start, '\n')) != NULL)
end ++;
else
end = start + strlen(start);
fputs(" ", logfile);
fwrite(start, end - start, 1, logfile);
if (cursor >= 0 && cursor >= (start - text) && cursor < (end - text))
{
int offset = cursor - (start - text);
fputs(" ", logfile);
while (offset > 0)
{
putc((offset & 1) ? ' ' : '-', logfile);
offset --;
}
fputs("^\n", logfile);
}
}
}
//
// 'is_equal()' - Compare two strings, allowing for specific differences.
//
static int // O - 1 if equal, 0 if not equal
is_equal(const char *generated, // I - Generated string
const char *expected, // I - Expected string
int *failed_at) // O - Where the comparison failed
{
const char *gptr = generated; // Pointer into generated string
while (*gptr && *expected)
{
// Skip whitespace differences
while (*gptr && isspace(*gptr & 255))
gptr ++;
while (*expected && isspace(*expected & 255))
expected ++;
if (!*gptr || !*expected)
break;
// Check non-whitespace characters...
if (*gptr != *expected)
{
// The expected list HTML is widely inconsistent in the CommonMark
// specification WRT the use of paragraph (<p>) elements. Allow for some
// variation as long as the visual structure is the same.
if (!strncmp(gptr, "<p>", 3) && *expected == gptr[3])
{
gptr += 3;
}
else if (!strncmp(gptr, "</p>", 4))
{
if (gptr[4] == '\n' && *expected == gptr[5])
gptr += 5;
else if (*expected == gptr[4])
gptr += 4;
}
else if (!strncmp(gptr, "p>\n</", 5) && *expected == gptr[5])
{
gptr += 5;
}
else if (!strncmp(gptr, "/p>\n<", 5) && *expected == gptr[5])
{
gptr += 5;
}
}
if (*gptr != *expected && (!isspace(*gptr & 255) || !isspace(*expected & 255)))
{
// If the strings don't match at this point and the difference is not in
// the type of whitespace used, that is an error...
// fprintf(stderr, "gptr=\"%s\", expected=\"%s\"\n", gptr, expected);
break;
}
gptr ++;
expected ++;
}
*failed_at = *gptr ? (int)(gptr - generated) : -1;
return (*gptr == *expected);
}
//
// 'make_anchor()' - Make an anchor for internal links.
//
static const char * // O - Anchor string
make_anchor(const char *text) // I - Text
{
char *bufptr; // Pointer into buffer
static char buffer[1024]; // Buffer for anchor string
if (!text)
return ("");
for (bufptr = buffer; *text && bufptr < (buffer + sizeof(buffer) - 1); text ++)
{
if ((*text >= '0' && *text <= '9') || (*text >= 'a' && *text <= 'z') || (*text >= 'A' && *text <= 'Z') || *text == '.' || *text == '-')
*bufptr++ = tolower(*text);
else if (*text == ' ')
*bufptr++ = '-';
}
*bufptr = '\0';
return (buffer);
}
//
// 'run_spec()' - Run through all of the examples in the specified markdown
// file.
//
static int // O - Exit status
run_spec(const char *filename, // I - Markdown spec file
FILE *logfile) // I - Log file
{
FILE *fp; // File to read from
int number = 0, // Current example number
passed = 0, // Number of passed tests
skipped = 0, // Number of skipped tests
failed = 0; // Number of failed tests
char line[1024], // Line from file
markdown[4096], // Example markdown
html[4096], // Expected HTML
*mptr, // Pointer into markdown
*hptr; // Pointer into HTML
if (!filename)
{
fp = stdin;
}
else if ((fp = fopen(filename, "r")) == NULL)
{
perror(filename);
return (1);
}
while (fgets(line, sizeof(line), fp))
{
if (!strncmp(line, "````", 4) && strstr(line, "``` example"))
{
// Start of example...
int is_html = 0; // 0 = markdown, 1 = HTML
number ++;
fprintf(logfile, " E%04d: ", number);
markdown[0] = markdown[sizeof(markdown) - 1] = '\0';
html[0] = html[sizeof(html) - 1] = '\0';
mptr = markdown;
hptr = html;
while (fgets(line, sizeof(line), fp))
{
if (line[0] == '.')
{
is_html = 1;
}
else if (!strncmp(line, "````", 4))
{
break;
}
else if (is_html)
{
add_spec_text(hptr, line, sizeof(html) - (size_t)(hptr - html));
hptr += strlen(hptr);
}
else
{
add_spec_text(mptr, line, sizeof(markdown) - (size_t)(mptr - markdown));
mptr += strlen(mptr);
}
}
if (!markdown[0])
{
fputs("SKIP (no markdown)\n", logfile);
skipped ++;
}
else if (!html[0])
{
fputs("SKIP (no HTML)\n", logfile);
skipped ++;
}
else if ((mptr = strchr(markdown, '<')) != NULL && (mptr == markdown || (mptr[-1] != '`' && mptr[-1] != '\\')))
{
fputs("SKIP (markdown example with embedded HTML)\n", logfile);
skipped ++;
}
else if ((mptr = strchr(markdown, '&')) != NULL && (mptr == markdown || (mptr[-1] != '`' && mptr[-1] != '\\')))
{
fputs("SKIP (markdown example with embedded HTML)\n", logfile);
skipped ++;
}
else
{
// Run a test...
FILE *infile, // Input file
*outfile; // Output file
char outbuffer[4097]; // Output buffer
mmd_t *doc; // Markdown document
int test_passed = 0, // Did the test pass?
failed_at = -1; // Offset of failure
infile = fmemopen(markdown, strlen(markdown), "r");
outfile = fmemopen(outbuffer, sizeof(outbuffer) - 1, "w");
outbuffer[0] = outbuffer[sizeof(outbuffer) - 1] = '\0';
if ((doc = mmdLoadFile(NULL, infile)) == NULL)
{
fputs("FAIL (unable to load)\n", logfile);
failed ++;
}
else
{
write_block(outfile, doc);
mmdFree(doc);
}
fclose(infile);
fclose(outfile);
if (is_equal(outbuffer, html, &failed_at))
{
fputs("PASS\n", logfile);
passed ++;
test_passed = 1;
}
else
{
fputs("FAIL (HTML differs)\n", logfile);
failed ++;
}
if (!test_passed)
{
fputs(" Markdown:\n", logfile);
indent_puts(logfile, markdown, -1);
fputs(" Expected:\n", logfile);
indent_puts(logfile, html, -1);
fputs(" Got:\n", logfile);
indent_puts(logfile, outbuffer, failed_at);
fputs("\n", logfile);
}
}
}
else if (line[0] == '#')
{
// Show heading...
char *lptr; // Pointer into line
for (lptr = line; *lptr; lptr ++)
if (*lptr != '#' && !isspace(*lptr & 255))
break; // Find start of heading...
fputs(lptr, logfile);
}
}
if (fp != stdin)
fclose(fp);
if (number == 0)
puts("\nNo tests found.");
else
printf("\nSummary: %d%% (%d passed, %d skipped, %d failed)\n", 100 * (passed + skipped) / number, passed, skipped, failed);
return (failed != 0);
}
//
// 'usage()' - Show usage...
//
static void
usage(void)
{
puts("Usage: ./testmmd [options] [filename.md] > filename.html");
puts("Options:");
puts("--ext all Support all markdown extensions");
puts("--ext none Support no markdown extensions");
puts("--help Show help");
puts("--only-body Only output body content");
puts("--spec Markdown file is a specification with example input and");
puts(" expected HTML output");
puts("-o filename.html Send output to file instead of stdout");
}
//
// 'write_block()' - Write a block node as HTML.
//
static void
write_block(FILE *fp, // I - Output file
mmd_t *parent) // I - Parent node
{
const char *element, // Enclosing element, if any
*hclass = NULL; // HTML class, if any
mmd_t *node; // Current child node
mmd_type_t type; // Node type
switch (type = mmdGetType(parent))
{
case MMD_TYPE_BLOCK_QUOTE :
element = "blockquote";
break;
case MMD_TYPE_ORDERED_LIST :
element = "ol";
break;
case MMD_TYPE_UNORDERED_LIST :
element = "ul";
break;
case MMD_TYPE_LIST_ITEM :
element = "li";
break;
case MMD_TYPE_HEADING_1 :
element = "h1";
break;
case MMD_TYPE_HEADING_2 :
element = "h2";
break;
case MMD_TYPE_HEADING_3 :
element = "h3";
break;
case MMD_TYPE_HEADING_4 :
element = "h4";
break;
case MMD_TYPE_HEADING_5 :
element = "h5";
break;
case MMD_TYPE_HEADING_6 :
element = "h6";
break;
case MMD_TYPE_PARAGRAPH :
element = "p";
break;
case MMD_TYPE_CODE_BLOCK :
if ((hclass = mmdGetExtra(parent)) != NULL)
fprintf(fp, "<pre><code class=\"language-%s\">", hclass);
else
fputs("<pre><code>", fp);
for (node = mmdGetFirstChild(parent); node; node = mmdGetNextSibling(node))
write_html(fp, mmdGetText(node));
fputs("</code></pre>\n", fp);
return;
case MMD_TYPE_THEMATIC_BREAK :
fputs("<hr />\n", fp);
return;
case MMD_TYPE_TABLE :
element = "table";
break;
case MMD_TYPE_TABLE_HEADER :
element = "thead";
break;
case MMD_TYPE_TABLE_BODY :
element = "tbody";
break;
case MMD_TYPE_TABLE_ROW :
element = "tr";
break;
case MMD_TYPE_TABLE_HEADER_CELL :
element = "th";
break;
case MMD_TYPE_TABLE_BODY_CELL_LEFT :
element = "td";
break;
case MMD_TYPE_TABLE_BODY_CELL_CENTER :
element = "td";
hclass = "center";
break;
case MMD_TYPE_TABLE_BODY_CELL_RIGHT :
element = "td";
hclass = "right";
break;
default :
element = NULL;
break;
}
if (type >= MMD_TYPE_HEADING_1 && type <= MMD_TYPE_HEADING_6 && !spec_mode)
{
// Add an anchor for each heading...
fprintf(fp, "<%s id=\"", element);
for (node = mmdGetFirstChild(parent); node; node = mmdGetNextSibling(node))
{
if (mmdGetWhitespace(node))
fputc('-', fp);
fputs(make_anchor(mmdGetText(node)), fp);
}
fputs("\">", fp);
}
else if (element)
fprintf(fp, "<%s%s%s>%s", element, hclass ? " class=" : "", hclass ? hclass : "", type <= MMD_TYPE_LIST_ITEM ? "\n" : "");
for (node = mmdGetFirstChild(parent); node; node = mmdGetNextSibling(node))
{
if (mmdIsBlock(node))
write_block(fp, node);
else
write_leaf(fp, node);
}
if (element)
fprintf(fp, "</%s>\n", element);
}
//
// 'write_html()' - Write text as HTML.
//
static void
write_html(FILE *fp, // I - Output file
const char *text) // I - Text string
{
if (!text)
return;
while (*text)
{
if (*text == '&')
fputs("&", fp);
else if (*text == '<')
fputs("<", fp);
else if (*text == '>')
fputs(">", fp);
else if (*text == '\"')
fputs(""", fp);
else
fputc(*text, fp);
text ++;
}
}
//
// 'write_leaf()' - Write a leaf node as HTML.
//
static void
write_leaf(FILE *fp, // I - Output file
mmd_t *node) // I - Leaf node
{
mmd_type_t type, // Current leaf node type
prev_type, // Previous leaf node type
next_type; // Next leaf node type
const char *element, // Encoding element, if any
*text, // Text to write
*url; // URL to write
if (mmdGetWhitespace(node))
fputc(' ', fp);
text = mmdGetText(node);
url = mmdGetURL(node);
switch (type = mmdGetType(node))
{
case MMD_TYPE_EMPHASIZED_TEXT :
element = "em";
break;
case MMD_TYPE_STRONG_TEXT :
element = "strong";
break;
case MMD_TYPE_STRUCK_TEXT :
element = "del";
break;
case MMD_TYPE_LINKED_TEXT :
element = NULL;
break;
case MMD_TYPE_CODE_TEXT :
element = "code";
break;
case MMD_TYPE_IMAGE :
fputs("<img src=\"", fp);
write_html(fp, url);
fputs("\" alt=\"", fp);
write_html(fp, text);
fputs("\" />", fp);
return;
case MMD_TYPE_HARD_BREAK :
if (mmdGetType(mmdGetParent(node)) < MMD_TYPE_HEADING_1 || mmdGetType(mmdGetParent(node)) > MMD_TYPE_HEADING_6)
fputs("<br />\n", fp);
return;
case MMD_TYPE_SOFT_BREAK :
fputs("<wbr />\n", fp);
return;
case MMD_TYPE_METADATA_TEXT :
return;
case MMD_TYPE_CHECKBOX :
// Put a checkbox graphic, checked if the text is non-NULL and empty otherwise...
if (text)
fputs("<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-check-square\" viewBox=\"0 0 16 16\"><path d=\"M14 1a1 1 0 0 1 1 1v12a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1V2a1 1 0 0 1 1-1h12zM2 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V2a2 2 0 0 0-2-2H2z\"/><path d=\"M10.97 4.97a.75.75 0 0 1 1.071 1.05l-3.992 4.99a.75.75 0 0 1-1.08.02L4.324 8.384a.75.75 0 1 1 1.06-1.06l2.094 2.093 3.473-4.425a.235.235 0 0 1 .02-.022z\"/></svg>", fp);
else
fputs("<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-square\" viewBox=\"0 0 16 16\"><path d=\"M14 1a1 1 0 0 1 1 1v12a1 1 0 0 1-1 1H2a1 1 0 0 1-1-1V2a1 1 0 0 1 1-1h12zM2 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V2a2 2 0 0 0-2-2H2z\"/></svg>", fp);
return;
default :
element = NULL;
break;
}
prev_type = mmdGetType(mmdGetPrevSibling(node));
next_type = mmdGetType(mmdGetNextSibling(node));
if (url)
{
const char *prev_url = mmdGetURL(mmdGetPrevSibling(node));
const char *title = mmdGetExtra(node);
if (!prev_url || strcmp(prev_url, url))
{
if (!strcmp(url, "@"))
fprintf(fp, "<a href=\"#%s\"", make_anchor(text));
else
fprintf(fp, "<a href=\"%s\"", url);
if (title)
{
fputs(" title=\"", fp);
write_html(fp, title);
fputs("\">", fp);
}
else
putc('>', fp);
}
}
if (element && prev_type != type)
fprintf(fp, "<%s>", element);
write_html(fp, text);
if (element && next_type != type)
fprintf(fp, "</%s>", element);
if (url)
{
const char *next_url = mmdGetURL(mmdGetNextSibling(node));
if (!next_url || strcmp(next_url, url))
fputs("</a>", fp);
}
}