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#include "unit-test.h"
#include "strbuf.h"
/* wrapper that supplies tests with an empty, initialized strbuf */
static void setup(void (*f)(struct strbuf*, const void*),
const void *data)
{
struct strbuf buf = STRBUF_INIT;
f(&buf, data);
strbuf_release(&buf);
cl_assert_equal_i(buf.len, 0);
cl_assert_equal_i(buf.alloc, 0);
}
/* wrapper that supplies tests with a populated, initialized strbuf */
static void setup_populated(void (*f)(struct strbuf*, const void*),
const char *init_str, const void *data)
{
struct strbuf buf = STRBUF_INIT;
strbuf_addstr(&buf, init_str);
cl_assert_equal_i(buf.len, strlen(init_str));
f(&buf, data);
strbuf_release(&buf);
cl_assert_equal_i(buf.len, 0);
cl_assert_equal_i(buf.alloc, 0);
}
static void assert_sane_strbuf(struct strbuf *buf)
{
/* Initialized strbufs should always have a non-NULL buffer */
cl_assert(buf->buf != NULL);
/* Buffers should always be NUL-terminated */
cl_assert(buf->buf[buf->len] == '\0');
/*
* In case the buffer contains anything, `alloc` must alloc must
* be at least one byte larger than `len`.
*/
if (buf->len)
cl_assert(buf->len < buf->alloc);
}
void test_strbuf__static_init(void)
{
struct strbuf buf = STRBUF_INIT;
cl_assert_equal_i(buf.len, 0);
cl_assert_equal_i(buf.alloc, 0);
cl_assert(buf.buf[0] == '\0');
}
void test_strbuf__dynamic_init(void)
{
struct strbuf buf;
strbuf_init(&buf, 1024);
assert_sane_strbuf(&buf);
cl_assert_equal_i(buf.len, 0);
cl_assert(buf.alloc >= 1024);
cl_assert(buf.buf[0] == '\0');
strbuf_release(&buf);
}
static void t_addch(struct strbuf *buf, const void *data)
{
const char *p_ch = data;
const char ch = *p_ch;
size_t orig_alloc = buf->alloc;
size_t orig_len = buf->len;
assert_sane_strbuf(buf);
strbuf_addch(buf, ch);
assert_sane_strbuf(buf);
cl_assert_equal_i(buf->len, orig_len + 1);
cl_assert(buf->alloc >= orig_alloc);
cl_assert(buf->buf[buf->len] == '\0');
}
static void t_addstr(struct strbuf *buf, const void *data)
{
const char *text = data;
size_t len = strlen(text);
size_t orig_alloc = buf->alloc;
size_t orig_len = buf->len;
assert_sane_strbuf(buf);
strbuf_addstr(buf, text);
assert_sane_strbuf(buf);
cl_assert_equal_i(buf->len, orig_len + len);
cl_assert(buf->alloc >= orig_alloc);
cl_assert(buf->buf[buf->len] == '\0');
cl_assert_equal_s(buf->buf + orig_len, text);
}
void test_strbuf__add_single_char(void)
{
setup(t_addch, "a");
}
void test_strbuf__add_empty_char(void)
{
setup(t_addch, "");
}
void test_strbuf__add_append_char(void)
{
setup_populated(t_addch, "initial value", "a");
}
void test_strbuf__add_single_str(void)
{
setup(t_addstr, "hello there");
}
void test_strbuf__add_append_str(void)
{
setup_populated(t_addstr, "initial value", "hello there");
}
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