[PATCH v3 09/10] random-dump.c: new test-binary to generate dump files

Jani Nikula jani at nikula.org
Sun Jan 15 00:05:15 PST 2012


On Jan 15, 2012 3:41 AM, "David Bremner" <david at tethera.net> wrote:
>
> From: David Bremner <bremner at debian.org>
>
> This binary creates a "torture test" dump file for the new dump
> format.
> ---
>  test/Makefile.local |    4 ++
>  test/basic          |    2 +-
>  test/random-dump.c  |  144
+++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 149 insertions(+), 1 deletions(-)
>  create mode 100644 test/random-dump.c
>
> diff --git a/test/Makefile.local b/test/Makefile.local
> index ba697f4..b59f837 100644
> --- a/test/Makefile.local
> +++ b/test/Makefile.local
> @@ -16,6 +16,9 @@ $(dir)/arg-test: $(dir)/arg-test.o
command-line-arguments.o util/libutil.a
>  $(dir)/hex-xcode: $(dir)/hex-xcode.o command-line-arguments.o
util/libutil.a
>        $(call quiet,CC) -I. $^ -o $@ -ltalloc
>
> +$(dir)/random-dump:  $(dir)/random-dump.o command-line-arguments.o
util/libutil.a
> +       $(call quiet,CC) -I. $^ -o $@ -ltalloc -lm
> +
>  $(dir)/smtp-dummy: $(smtp_dummy_modules)
>        $(call quiet,CC) $^ -o $@
>
> @@ -25,6 +28,7 @@ $(dir)/symbol-test: $(dir)/symbol-test.o
>  .PHONY: test check
>
>  test-binaries: $(dir)/arg-test $(dir)/hex-xcode \
> +       $(dir)/random-dump \
>         $(dir)/smtp-dummy $(dir)/symbol-test
>
>  test:  all test-binaries
> diff --git a/test/basic b/test/basic
> index af57026..e3a6cef 100755
> --- a/test/basic
> +++ b/test/basic
> @@ -54,7 +54,7 @@ test_begin_subtest 'Ensure that all available tests
will be run by notmuch-test'
>  eval $(sed -n -e '/^TESTS="$/,/^"$/p' $TEST_DIRECTORY/notmuch-test)
>  tests_in_suite=$(for i in $TESTS; do echo $i; done | sort)
>  available=$(find "$TEST_DIRECTORY" -maxdepth 1 -type f -executable
-printf '%f\n' | \
> -    sed -r -e
"/^(aggregate-results.sh|notmuch-test|smtp-dummy|test-verbose|symbol-test|arg-test|hex-xcode)$/d"
| \
> +    sed -r -e
"/^(aggregate-results.sh|notmuch-test|smtp-dummy|test-verbose|symbol-test|arg-test|hex-xcode|random-dump)$/d"
| \
>     sort)
>  test_expect_equal "$tests_in_suite" "$available"
>
> diff --git a/test/random-dump.c b/test/random-dump.c
> new file mode 100644
> index 0000000..1949425
> --- /dev/null
> +++ b/test/random-dump.c
> @@ -0,0 +1,144 @@
> +/*
> +   Generate a random dump file in 'notmuch' format.
> +   Generated message-id's and tags are intentionally nasty.
> +
> +   We restrict ourselves to 7 bit message-ids, because generating
> +   random valid UTF-8 seems like work. And invalid UTF-8 can't be
> +   round-tripped via Xapian.
> +
> + */
> +
> +#include <stdlib.h>
> +#include <assert.h>
> +#include <talloc.h>
> +#include <string.h>
> +#include "math.h"
> +#include "hex-escape.h"
> +#include "command-line-arguments.h"
> +
> +static void
> +hex_out (void *ctx, char *buf)
> +{
> +    static char *encoded_buf = NULL;
> +    static size_t encoded_buf_size = 0;
> +
> +    if (hex_encode (ctx, buf, &encoded_buf, &encoded_buf_size) !=
HEX_SUCCESS) {
> +       fprintf (stderr, "Hex encoding failed");
> +       exit (1);
> +    }
> +
> +    fputs (encoded_buf, stdout);
> +}
> +
> +static void
> +random_chars (char *buf, int from, int stop, int max_char,
> +             const char *blacklist)
> +{
> +    int i;
> +
> +    for (i = from; i < stop; i++) {
> +       do {
> +           buf[i] = ' ' + (random () % (max_char - ' '));
> +       } while (blacklist && strchr (blacklist, buf[i]));
> +    }
> +}
> +
> +static void
> +random_tag (void *ctx, size_t len)
> +{
> +    static char *buf = NULL;
> +    static size_t buf_len = 0;
> +
> +    int use = (random () % (len - 1)) + 1;
> +
> +    if (len > buf_len) {
> +       buf = talloc_realloc (ctx, buf, char, len);
> +       buf_len = len;
> +    }
> +
> +    random_chars (buf, 0, use, 255, NULL);
> +
> +    buf[use] = '\0';
> +
> +    hex_out (ctx, buf);
> +}
> +
> +static void
> +random_message_id (void *ctx, size_t len)
> +{
> +    static char *buf = NULL;
> +    static size_t buf_len = 0;
> +
> +    int lhs_len = (random () % (len / 2 - 1)) + 1;
> +
> +    int rhs_len = (random () % len / 2) + 1;
> +
> +    const char *blacklist = "\n\r@<>[]()";
> +
> +    if (len > buf_len) {
> +       buf = talloc_realloc (ctx, buf, char, len);
> +       buf_len = len;
> +    }
> +
> +    random_chars (buf, 0, lhs_len, 127, blacklist);
> +
> +    buf[lhs_len] = '@';
> +
> +    random_chars (buf, lhs_len + 1, lhs_len + rhs_len + 1, 127,
blacklist);
> +
> +    hex_out (ctx, buf);
> +}
> +
> +int
> +main (int argc, char **argv)
> +{
> +
> +    void *ctx = talloc_new (NULL);
> +    int num_lines = 500;
> +    int max_tags = 10;
> +    int message_id_len = 100;
> +    int tag_len = 50;
> +    int seed = 734569;
> +
> +    int pad_tag = 0, pad_mid = 0;
> +
> +    notmuch_opt_desc_t options[] = {
> +       { NOTMUCH_OPT_INT, &num_lines, "num-lines", 'n', 0 },
> +       { NOTMUCH_OPT_INT, &max_tags, "max-tags", 'm', 0 },
> +       { NOTMUCH_OPT_INT, &message_id_len, "message-id-len", 'M', 0 },
> +       { NOTMUCH_OPT_INT, &tag_len, "tag-len", 't', 0 },
> +       { NOTMUCH_OPT_INT, &seed, "tag-len", 't', 0 },

s/tag-len/seed/

> +       { 0, 0, 0, 0, 0 }
> +    };
> +
> +    int opt_index = parse_arguments (argc, argv, options, 1);
> +
> +    if (opt_index < 0)
> +       exit (1);
> +
> +    pad_mid = ((int) log10 (num_lines) + 1);
> +    pad_tag = ((int) log10 (max_tags)) + 1;
> +
> +    srandom (seed);
> +
> +    int line;
> +    for (line = 0; line < num_lines; line++) {
> +
> +       printf ("%0*d-", pad_mid, line);
> +
> +       random_message_id (ctx, message_id_len);
> +
> +       int num_tags = random () % (max_tags + 1);
> +
> +       int j;
> +       for (j = 0; j < num_tags; j++) {
> +           printf (" %0*d-", pad_tag, j);
> +           random_tag (ctx, tag_len);
> +       }
> +       putchar ('\n');
> +    }
> +
> +    talloc_free (ctx);
> +
> +    return 0;
> +}
> --
> 1.7.7.3
>
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