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test_amp.c
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test_amp.c
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/* Copyright (c) 2011 - Eric P. Mangold
* Copyright (c) 2011 - Peter Le Bek
*
* See LICENSE.txt for details.
*/
/* TODO
*
* - Add a benchmark test-case for encoding, and for decoding AMP packets
* to/from memory buffers.
*
* This will allow us to tweak and optimize the parser and encoder
* routines, while having concrete feedback about the impact those
* tweaks have.
*
* - Optimize AMP-parser state machine. amp_parse_box() in amp.c
* State-machine states (KEY_LEN_READ, etc) should be bit-wise flags
* and testing for the flag should be a bitwise-AND operation, which
* may be faster(?)
*/
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <errno.h>
#include <string.h>
/* Check - C unit testing framework */
#include <check.h>
#include "amp.h"
#include "amp_internal.h"
#include "list.h"
#include "test.h"
#include "dispatch.h"
#include "table.h"
#include "unix_string.h"
struct consume_case
{
unsigned char *buf;
int bufSize;
int retVal;
char *expectedResult;
};
unsigned char validBox[] = {
0x00, 0x07, /* key of length 7 follows */
0x5F, 0x61, 0x6E, 0x73, 0x77, 0x65, 0x72,
0x00, 0x02, /* value of length 2 follows */
0x32, 0x33,
0x00, 0x05, /* key of length 5 follows */
0x74, 0x6F, 0x74, 0x61, 0x6C,
0x00, 0x02, /* value of length 2 follows */
0x39, 0x34,
0x00, 0x00, /* empty key terminates the box */
};
unsigned char badKeySizeBox[] = {
0x04, 0x07, /* key length > 255 */
0x5F, 0x61, 0x6E, 0x73, 0x77, 0x65,
0x72, 0x00, 0x02, 0x32, 0x33, 0x00, 0x05, 0x74,
0x6F, 0x74, 0x61, 0x6C, 0x00, 0x02, 0x39, 0x34,
0x00, 0x00 };
unsigned char emptyBox[] = { 0x00, 0x00 };
struct consume_case consume_cases[] = {
{ validBox, sizeof(validBox), 0, "23"},
{ badKeySizeBox, sizeof(badKeySizeBox), AMP_BAD_KEY_SIZE, "" },
};
int num_consume_tests = (sizeof(consume_cases) /
sizeof(struct consume_case));
List_T *saved_boxes = NULL;
static int save_box(AMP_Proto_T *proto, AMP_Box_T *box)
{
int err;
saved_boxes = List_push(saved_boxes, box, &err);
return 0;
}
/* A dispatch function that just returns a code */
int dispatch_fail_code;
static int dispatch_fail(AMP_Proto_T *proto, AMP_Box_T *box)
{
return dispatch_fail_code;
}
List_T *saved_results = NULL;
struct saved_result
{
AMP_Proto_T *proto;
AMP_Result_T *result;
void *callback_arg;
};
void save_result_cb(AMP_Proto_T *proto, AMP_Result_T *result,
void *callback_arg)
{
int err;
struct saved_result *r;
r = MALLOC(sizeof(*r));
r->proto = proto;
r->result = result;
r->callback_arg = callback_arg;
saved_results = List_push(saved_results, r, &err);
}
void ignore_result_cb(AMP_Proto_T *proto, AMP_Result_T *result,
void *callback_arg)
{
amp_free_result(result);
}
int discarding_write_handler(AMP_Proto_T *proto, unsigned char *buf,
int bufSize, void *write_arg)
{
free(buf);
return 0;
}
List_T *saved_writes = NULL;
struct saved_write
{
AMP_Proto_T *proto;
void *write_arg;
AMP_Chunk_T *chunk;
};
int save_writes(AMP_Proto_T *proto, unsigned char *buf, int bufSize,
void *write_arg)
{
int err;
struct saved_write *w;
w = MALLOC(sizeof(*w));
w->proto = proto;
w->write_arg = write_arg;
w->chunk = amp_chunk_for_buffer(buf, bufSize);
saved_writes = List_push(saved_writes, w, &err);
return 0;
}
AMP_Proto_T *test_proto;
void core_setup ()
{
test_proto = amp_new_proto();
amp_set_write_handler(test_proto, discarding_write_handler, NULL);
}
static void free_result(void **x, void*cl)
{
amp_free_result(*x);
}
static void free_box(void **x, void*cl)
{
amp_free_box(*x);
}
void core_teardown ()
{
amp_free_proto(test_proto);
test_proto = NULL;
/* Free any list items and associated objects */
List_map(saved_boxes, free_box, NULL);
List_free(&saved_boxes);
List_map(saved_results, free_result, NULL);
List_free(&saved_results);
}
/* Uses core_setup() and core_teardown()
*/
START_TEST(test__amp_consume_bytes)
{
/* XXX TODO this test case seems really crummy */
/* the variable _i is made available by Check's "loop test" machinery */
unsigned char *buf;
int bufSize;
AMP_Box_T *gotBox;
struct consume_case c;
c = consume_cases[_i];
/* bypass _amp_process_full_packet machinery */
test_proto->dispatch_box = save_box;
int ret = amp_consume_bytes(test_proto, c.buf, c.bufSize);
fail_unless(ret == c.retVal);
if (ret == 0)
{
fail_unless(List_length(saved_boxes) == 1);
saved_boxes = List_pop(saved_boxes, (void**)&gotBox);
/* expected 0 return */
fail_if( amp_get_bytes(gotBox, "_answer", &buf, &bufSize) );
/* expected 0 return (memory equal) */
fail_if( memcmp(buf, c.expectedResult, strlen(c.expectedResult)) );
amp_free_box(gotBox);
}
else
{
/* Verify AMP_Proto is in a fatal error state */
fail_unless(test_proto->error);
/* Verify that amp_consume_bytes refuses to do any work when
* AMP_Proto is in the fatal error state */
fail_unless(amp_consume_bytes(test_proto, '\0', 1) == AMP_PROTO_ERROR);
}
}
END_TEST
START_TEST(test__amp_consume_bytes__multiple_boxes)
{
/* This test is looped three times - the fist time we feed in all the boxes
* in one big buffer. The second time, we feed it in one byte at a time,
* and the 3rd time we feed it in 2 bytes at a time */
/* the variable _i is made available by Check's "loop test" machinery */
unsigned char block[512];
unsigned char *buf;
int bufSize;
int blockSize = 0;
AMP_Box_T *box, *box2, *box3;
/* build buffer with 3 boxes in it */
/* box 1 */
box = amp_new_box();
amp_put_cstring(box, COMMAND, "Cat");
amp_put_cstring(box, "foo", "FOO");
amp_put_cstring(box, "bar", "BAR");
amp_put_int(box, ASK, 1);
amp_serialize_box(box, &buf, &bufSize);
memcpy(&block[blockSize], buf, bufSize);
free(buf);
blockSize += bufSize;
/* box 2 */
box2 = amp_new_box();
amp_put_int(box2, ANSWER, 123);
amp_put_int(box2, "answer", 42);
amp_serialize_box(box2, &buf, &bufSize);
memcpy(&block[blockSize], buf, bufSize);
free(buf);
blockSize += bufSize;
/* box 3 */
box3 = amp_new_box();
amp_put_int(box3, _ERROR, 456);
amp_put_cstring(box3, ERROR_CODE, "BAD");
amp_serialize_box(box3, &buf, &bufSize);
memcpy(&block[blockSize], buf, bufSize);
free(buf);
blockSize += bufSize;
/* feed to amp_consume_bytes() */
AMP_Proto_T *proto = amp_new_proto();
/* captured dispatched boxes in a List_T* */
proto->dispatch_box = save_box;
int idx;
switch(_i)
{
case 0:
/* all at once */
fail_if(amp_consume_bytes(proto, block, blockSize));
break;
case 1:
/* one byte at a time */
for (idx = 0; idx < blockSize; idx++)
{
fail_if(amp_consume_bytes(proto, &block[idx], 1));
}
break;
case 2:
/* two bytes at a time */
idx = 0;
/* if odd number of bytes - feed 1 byte first */
if (blockSize % 2 == 1)
{
fail_if(amp_consume_bytes(proto, &block[0], 1));
idx++;
}
for (; idx < blockSize; idx+=2)
{
fail_if(amp_consume_bytes(proto, &block[idx], 2));
}
break;
}
amp_free_proto(proto);
/* 3 boxes should have been captured */
fail_unless(List_length(saved_boxes) == 3);
saved_boxes = List_reverse(saved_boxes);
AMP_Box_T *gotBox;
/* check box 1 - a _command box */
saved_boxes = List_pop(saved_boxes, (void**)&gotBox);
fail_unless( amp_boxes_equal(gotBox, box) );
amp_free_box(gotBox);
/* check box 2 - an _answer box */
saved_boxes = List_pop(saved_boxes, (void**)&gotBox);
fail_unless( amp_boxes_equal(gotBox, box2) );
amp_free_box(gotBox);
/* check box 3 - an _error box */
saved_boxes = List_pop(saved_boxes, (void**)&gotBox);
fail_unless( amp_boxes_equal(gotBox, box3) );
amp_free_box(gotBox);
amp_free_box(box);
amp_free_box(box2);
amp_free_box(box3);
}
END_TEST
START_TEST(test__amp_consume_bytes__dispatch_failure)
{
int result;
AMP_Proto_T *proto = amp_new_proto();
dispatch_fail_code = 77;
proto->dispatch_box = dispatch_fail;
result = amp_consume_bytes(proto, validBox, sizeof(validBox));
fail_unless(result == 77);
fail_unless(proto->error == 77);
amp_free_proto(proto);
}
END_TEST
START_TEST(test__amp_parse_box__invalid_state)
{
/* If AMP_Proto_T *->state is not a known value, parsing should fail with AMP_INTERNAL_ERROR.
* This should never happen, but it doesn't hurt to have test coverage for it */
int result;
test_proto->state = 666;
result = amp_consume_bytes(test_proto, "parseme", 7);
fail_unless(result == AMP_INTERNAL_ERROR);
fail_unless(test_proto->error == AMP_INTERNAL_ERROR);
}
END_TEST
START_TEST(dispatch_handled_responses)
{
/* XXX TODO test with multiple callbacks set, responses arriving
* out of original order */
AMP_Box_T *args, *answer, *test_box;
unsigned int askKey, askKey2, askKey3;
args = amp_new_box();
/* Register some callbacks */
amp_call(test_proto, "doSomething", args,
save_result_cb, NULL, &askKey);
amp_call(test_proto, "doSomethingBad", args,
save_result_cb, NULL, &askKey2);
amp_call(test_proto, "doSomethingBoring", args,
save_result_cb, NULL, &askKey3);
amp_free_box(args);
/* Cancel a request */
amp_cancel(test_proto, askKey3);
/* Contrive a successful response - this should be ignored since
* the request was cancelled */
amp_put_int(test_proto->box, ANSWER, askKey3);
fail_if( test_proto->dispatch_box(test_proto, test_proto->box));
/* Verify our registered callback got 1 (and only 1) result... */
fail_unless(List_length(saved_results) == 1);
/* ...and that it contained the cancellation we expected... */
struct saved_result *r;
saved_results = List_pop(saved_results, (void**)&r);
fail_unless(r->result->reason == AMP_CANCEL);
fail_unless(r->result->error == NULL);
fail_unless(r->result->response == NULL);
amp_free_result(r->result);
free(r);
/* Contrive a successful response */
test_box = amp_new_box();
test_proto->box = test_box;
amp_put_int(test_box, ANSWER, askKey);
fail_if( test_proto->dispatch_box(test_proto, test_box));
/* Verify our registered callback got a result... */
fail_unless(List_length(saved_results) == 1);
/* ...and that it contained the response we expected... */
saved_results = List_pop(saved_results, (void**)&r);
fail_unless(r->result->reason == AMP_SUCCESS);
fail_unless( (r->result->response)->args == test_box);
fail_unless(r->result->error == NULL);
amp_free_result(r->result);
free(r);
/* Contrive an error response */
test_box = amp_new_box();
test_proto->box = test_box;
char *testErr = "TEST_ERR";
amp_put_int(test_box, _ERROR, askKey2);
amp_put_cstring(test_box, ERROR_CODE, testErr);
fail_if( test_proto->dispatch_box(test_proto, test_box));
/* Verify our registered callback got a result... */
fail_unless(List_length(saved_results) == 1);
/* ...and that it contained the error we expected... */
saved_results = List_pop(saved_results, (void**)&r);
fail_unless(r->result->reason == AMP_ERROR);
fail_if( memcmp(testErr, r->result->error->error_code->value,
r->result->error->error_code->size) );
fail_unless(r->result->response == NULL);
amp_free_result(r->result);
free(r);
}
END_TEST
List_T *saved_requests = NULL;
static void sum_responder(AMP_Proto_T *proto, AMP_Request_T *request,
void *responder_arg)
{
int err;
saved_requests = List_push(saved_requests, request, &err);
}
static void multiply_responder(AMP_Proto_T *proto, AMP_Request_T *request,
void *responder_arg)
{
int err;
saved_requests = List_push(saved_requests, request, &err);
}
START_TEST(dispatch_handled_requests)
{
/* Verify that registered responders recieve their corresponding requests */
AMP_Box_T *test_box;
amp_add_responder(test_proto, "Sum", sum_responder, NULL);
amp_add_responder(test_proto, "Multiply", multiply_responder, NULL);
/* Generate Sum command */
/* An AMP_Proto starts off with an empty box - so don't need to
* manaully allocate one */
test_box = test_proto->box;
amp_put_int(test_box, ASK, 1);
amp_put_cstring(test_box, COMMAND, "Sum");
amp_put_int(test_box, "a", 3);
amp_put_int(test_box, "b", 8);
/* Dispatch Sum command */
fail_if( test_proto->dispatch_box(test_proto, test_box));
fail_unless(List_length(saved_requests) == 1);
AMP_Request_T *sumRequest;
saved_requests = List_pop(saved_requests, (void**)&sumRequest);
fail_unless(sumRequest->args == test_box);
amp_free_request(sumRequest);
/* Verify a dropped responder doesn't get called */
test_box = amp_new_box();
test_proto->box = test_box;
amp_put_int(test_box, ASK, 2);
amp_put_cstring(test_box, COMMAND, "Multiply");
amp_put_int(test_box, "a", 9);
amp_put_int(test_box, "b", 3);
/* Remove the Multipy responder */
amp_remove_responder(test_proto, "Multiply");
fail_if( test_proto->dispatch_box(test_proto, test_box));
fail_unless(List_length(saved_requests) == 0);
}
END_TEST
START_TEST(unhandled_request_sends_error)
{
/* Verify that an incoming request (_command) box, with no
* registered command handler, causes an error box to be sent. */
AMP_Box_T *test_box;
AMP_Box_T *box;
AMP_Proto_T *proto;
struct saved_write *write;
int bytesConsumed;
int writtenErrorKey;
unsigned char *buf;
int bufSize;
/* An AMP_Proto starts off with an empty box - so don't need to
* manaully allocate one */
test_box = test_proto->box;
amp_put_int(test_box, ASK, 2);
amp_put_cstring(test_box, COMMAND, "BadCommand");
/* capture outgoing data */
amp_set_write_handler(test_proto, save_writes, NULL);
/* try to dispatch an unknown command - which should result
* in an error box being written */
test_proto->dispatch_box(test_proto, test_box);
fail_unless(List_length(saved_writes) == 1);
saved_writes = List_pop(saved_writes, (void**)&write);
fail_unless(write->proto == test_proto); /* write handler called with correct AMP_Proto pointer */
/* parse the written bytes as an AMP_Box and make sure it looks right */
proto = amp_new_proto();
fail_unless( amp_parse_box(proto, proto->box, &bytesConsumed,
write->chunk->value,
write->chunk->size) );
/* parsing the box used all bytes that were written? */
fail_unless(bytesConsumed == write->chunk->size);
free(write->chunk->value);
amp_free_chunk(write->chunk);
free(write);
/* right number of keys written?
* 1 for "_error" key
* 1 for "_error_code" key
* 1 for "_error_description" key */
fail_unless(amp_num_keys(proto->box) == 3);
/* CHECK "_error" key */
/* expected 0 return */
fail_if(amp_get_int(proto->box, _ERROR, &writtenErrorKey));
/* same _error key written as received _ask key */
fail_unless(writtenErrorKey == 2);
/* CHECK "_error_code" key */
/* expected 0 return */
fail_if(amp_get_bytes(proto->box, ERROR_CODE, &buf, &bufSize));
/* correct code? */
fail_unless(bufSize == strlen(AMP_ERROR_UNHANDLED));
/* expected 0 return (memory is equal) */
fail_if(memcmp(buf, AMP_ERROR_UNHANDLED, bufSize));
/* correct description? */
/* expected 0 return */
fail_if(amp_get_bytes(proto->box, ERROR_DESCR, &buf, &bufSize));
char expected[] = "Unhandled Command: 'BadCommand'";
fail_unless(bufSize == strlen(expected));
/* expected 0 return (memory is equal) */
fail_if(memcmp(buf, expected, bufSize));
/* NOW test that an error is NOT written if no
* _ask key was given */
amp_free_box(test_proto->box);
test_box = amp_new_box();
test_proto->box = test_box;
amp_put_cstring(test_box, COMMAND, "BadCommand");
test_proto->dispatch_box(test_proto, test_box);
fail_unless(List_length(saved_writes) == 0);
amp_free_proto(proto);
}
END_TEST
START_TEST(dispatch_unhandled_boxes)
{
/* Test that receiving boxes if no corresponding handler has been
* set does not crash your program */
fail_unless(test_proto->dispatch_box(test_proto, test_proto->box) == AMP_BOX_EMPTY);
/* A command box */
amp_put_cstring(test_proto->box, COMMAND, "Foo");
fail_if(test_proto->dispatch_box(test_proto, test_proto->box));
/* An answer box */
test_proto->box = amp_new_box();
amp_put_int(test_proto->box, ANSWER, 1);
fail_if(test_proto->dispatch_box(test_proto, test_proto->box));
/* An error box */
test_proto->box = amp_new_box();
amp_put_int(test_proto->box, _ERROR, 1);
fail_if(test_proto->dispatch_box(test_proto, test_proto->box));
}
END_TEST
START_TEST(test_process_bad_box)
{
AMP_Box_T *box = amp_new_box();
fail_unless(_amp_process_full_packet(NULL, box) == AMP_BOX_EMPTY);
amp_free_box(box);
box = amp_new_box();
amp_put_cstring(box, "foo", "bar");
fail_unless(_amp_process_full_packet(NULL, box) == AMP_REQ_KEY_MISSING);
amp_free_box(box);
}
END_TEST
START_TEST(test_process_with_no_command_handler)
{
amp_put_cstring(test_proto->box, COMMAND, "SomeUnknownCommand");
fail_unless(test_proto->dispatch_box(test_proto, test_proto->box) == 0);
/* dispatch a second unhandled command box to ensure the first
* one was free'd properly. `make valgrind' will detect the error
* if it wasn't. */
test_proto->box = amp_new_box();
amp_put_cstring(test_proto->box, COMMAND, "AnotherUnknownCommand");
fail_unless(test_proto->dispatch_box(test_proto, test_proto->box) == 0);
}
END_TEST
START_TEST(_amp_new_error_from_box__error_cases)
{
int result;
AMP_Box_T *box;
AMP_Error_T *error = NULL;
box = amp_new_box();
amp_put_cstring(box, _ERROR, "1");
amp_put_cstring(box, ERROR_CODE, "SOME_ERROR_CODE");
amp_put_cstring(box, ERROR_DESCR, "Some error description.");
/* all amp_get_* functions on this box, for the given key,
* will fail with this code */
box->get_fail_code = 77;
box->get_fail_key = _ERROR;
result = _amp_new_error_from_box(box, &error);
fail_unless( result == 77 );
fail_unless( error == NULL );
/* exercise a different failure-path */
box->get_fail_key = ERROR_CODE;
result = _amp_new_error_from_box(box, &error);
fail_unless( result == 77 );
fail_unless( error == NULL );
box->get_fail_key = ERROR_DESCR;
result = _amp_new_error_from_box(box, &error);
fail_unless( result == 77 );
fail_unless( error == NULL );
amp_free_box(box);
}
END_TEST
START_TEST(_amp_new_request_from_box__error_cases)
{
int result;
AMP_Box_T *box;
AMP_Request_T *req = NULL;
box = amp_new_box();
amp_put_cstring(box, COMMAND, "SomeCommand");
amp_put_cstring(box, ASK, "1");
/* TEST SUPPORT: rig all amp_get_* functions on this box,
* for the given key, to fail with this code. */
box->get_fail_code = 77;
box->get_fail_key = COMMAND;
result = _amp_new_request_from_box(box, &req);
fail_unless( result == 77 );
fail_unless( req == NULL );
/* exercise a different failure-path */
box->get_fail_key = ASK;
result = _amp_new_request_from_box(box, &req);
fail_unless( result == 77 );
fail_unless( req == NULL );
amp_free_box(box);
}
END_TEST
START_TEST(_amp_remove_responder__not_found)
{
_AMP_Responder_Map_p map = _amp_new_responder_map();
/* just checking that it doesn't crash - and when run under valgrind
* this test will guard against a lot of memory-related errors */
_amp_remove_responder(map, "FooCommand");
_amp_free_responder_map(map);
}
END_TEST
START_TEST(test_free_proto)
{
/* test that amp_free_proto() also free's proto->box.
* test_proto is created and free'd by core_setup/teardown */
/* TODO - populate the callback map and any other dynamic data
* structures contained by an AMP_Proto so we can be sure that
* everything is really free'd up by amp_free_proto() */
amp_put_cstring(test_proto->box, "someKey", "some junk");
}
END_TEST
void junk_callback(AMP_Proto_T *proto, AMP_Result_T *result,
void *callback_arg)
{
amp_free_result(result);
}
START_TEST(test_process_with_malloc_failure)
{
/* exercise _amp_process_full_packet() multiple times.
* we set a counter which indicates the number of times malloc()
* should succeed before returning NULL.
* */
int fail_after = 0;
int result;
/* COMMAND box */
while (1)
{
amp_put_cstring(test_proto->box, COMMAND, "FooCommand");
amp_put_int(test_proto->box, ASK, 1);
enable_malloc_failures(fail_after++);
/* run code under test */
result = test_proto->dispatch_box(test_proto, test_proto->box);
/* clean up and check result */
disable_malloc_failures();
amp_free_box(test_proto->box);
test_proto->box = amp_new_box();
/* Were one or more malloc failures simulated? */
if (allocation_failure_occurred)
{
/* Yes */
fail_unless(result == ENOMEM);
}
else
/* The successful code path is already tested elsewhere. */
break;
}
/* ANSWER box */
int ask_key = 1;
AMP_Proto_T *proto;
_AMP_Callback_p cb;
fail_after = 0;
while (1)
{
proto = amp_new_proto();
cb = _amp_new_callback(junk_callback, NULL);
_amp_put_callback(proto->outstanding_requests, ask_key, cb);
amp_put_int(proto->box, ANSWER, ask_key);
enable_malloc_failures(fail_after++);
/* run code under test */
result = proto->dispatch_box(proto, proto->box);
/* clean up and check result */
disable_malloc_failures();
amp_free_proto(proto);
/* Were one or more malloc failures simulated? */
if (allocation_failure_occurred)
{
/* Yes */
fail_unless(result == ENOMEM);
}
else
/* The successful code path is already tested elsewhere. */
break;
}
/* ANSWER box - test another error-handling code path where the
* _answer key does not decode to an integer - non-integer
* _answer keys are not illegal per-se, but /we/ never send
* an _ask key that is not an integer, so we can safely assume
* that valid respones will always have intger _answer keys */
proto = amp_new_proto();
amp_put_cstring(proto->box, ANSWER, "garbage");
/* run code under test */
result = proto->dispatch_box(proto, proto->box);
/* clean up and check result */
amp_free_proto(proto);
fail_unless(result == AMP_DECODE_ERROR);
/* ERROR box */
fail_after = 0;
while (1)
{
proto = amp_new_proto();
cb = _amp_new_callback(junk_callback, NULL);
_amp_put_callback(proto->outstanding_requests, ask_key, cb);
amp_put_int(proto->box, _ERROR, 1);
enable_malloc_failures(fail_after++);
/* run code under test */
result = proto->dispatch_box(proto, proto->box);
/* clean up and check result */
disable_malloc_failures();
amp_free_proto(proto);
/* Were one or more malloc failures simulated? */
if (allocation_failure_occurred)
{
/* Yes */
fail_unless(result == ENOMEM);
}
else
/* The successful code path is already tested elsewhere. */
break;
}
}
END_TEST
START_TEST(test_new_box_with_malloc_failures)
{
/* test that amp_new_box() handles malloc() failures
* gracefully */
int fail_after = 0;
AMP_Box_T *result;
while (1)
{
enable_malloc_failures(fail_after++);
/* run code under test */
result = amp_new_box();
/* clean up and check result */
disable_malloc_failures();
/* Were one or more malloc failures simulated? */
if (allocation_failure_occurred)
{
/* Yes */
fail_unless(result == NULL);
}
else
{
fail_unless(result != NULL);
amp_free_box(result);
break;
}
}
}
END_TEST
START_TEST(test_new_proto_with_malloc_failures)
{
/* test that amp_new_proto() handles malloc() failures
* gracefully */
int fail_after = 0;
AMP_Proto_T *result;
while (1)
{
enable_malloc_failures(fail_after++);
/* run code under test */
result = amp_new_proto();
/* clean up and check result */
disable_malloc_failures();
/* Were one or more malloc failures simulated? */
if (allocation_failure_occurred)
{
/* Yes */
fail_unless(result == NULL);
}
else
{
fail_unless(result != NULL);
amp_free_proto(result);
break;
}
}
}
END_TEST
START_TEST(test_parse_box_with_malloc_failures)
{
AMP_Proto_T *proto;
int fail_after = 0;
int bytesConsumed;
int result;
while (1)
{
proto = amp_new_proto();
enable_malloc_failures(fail_after++);
/* run code under test */
result = amp_parse_box(proto, proto->box, &bytesConsumed,
validBox, sizeof(validBox));
/* clean up and check result */
disable_malloc_failures();
/* Were one or more malloc failures simulated? */
if (allocation_failure_occurred)
{
/* Yes */
fail_unless(result == 0);
fail_unless(proto->error == ENOMEM);
fail_unless(bytesConsumed >= 0);