mbedtls/tests/suites/test_suite_mps.function
Hanno Becker 09d880aa38 MPS Reader Tests: Test basic feed-get-commit-reclaim cycle
This commit adds an MPS unit test suite `test_suite_mps` which will
subsequently be populated with unit tests for all components of MPS.

As a start, a test case

```
   mbedtls_mps_reader_no_pausing_single_step_single_round()
```

is added which exercises the most basic usage of the MPS reader
component; see the test case description for more details.

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
2021-03-29 14:19:32 +01:00

63 lines
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/* BEGIN_HEADER */
#include <stdlib.h>
/* TODO: How are test suites supposed to include internal headers? */
#include "../library/mps/reader.h"
/*
* Compile-time configuration for test suite.
*/
/* Comment/Uncomment this to disable/enable the
* testing of the various MPS layers.
* This can be useful for time-consuming instrumentation
* tasks such as the conversion of E-ACSL annotations
* into runtime assertions. */
#define TEST_SUITE_MPS_READER
/* End of compile-time configuration. */
/* END_HEADER */
/* BEGIN_CASE depends_on:TEST_SUITE_MPS_READER */
void mbedtls_mps_reader_no_pausing_single_step_single_round( int with_acc )
{
/* This test exercises the most basic use of the MPS reader:
* - The 'producing' layer provides a buffer
* - The 'consuming' layer fetches it in a single go.
* - After processing, the consuming layer commit the data
* and returns back to the producing layer.
*
* Parameters:
* - with_acc: 0 if the reader should be initialized without accumulator.
* 1 if the reader should be initialized with accumulator.
*
* Whether the accumulator is present or not should not matter,
* since the consumer's request can be fulfilled from the data
* that the producer has provided.
*/
unsigned char bufA[100];
unsigned char acc[10];
unsigned char *tmp;
mbedtls_reader rd;
for( int i=0; (unsigned) i < sizeof( bufA ); i++ )
bufA[i] = (unsigned char) i;
/* Preparation (lower layer) */
if( with_acc == 0 )
mbedtls_reader_init( &rd, NULL, 0 );
else
mbedtls_reader_init( &rd, acc, sizeof( acc ) );
TEST_ASSERT( mbedtls_reader_feed( &rd, bufA, sizeof( bufA ) ) == 0 );
/* Consumption (upper layer) */
/* Consume exactly what's available */
TEST_ASSERT( mbedtls_reader_get( &rd, 100, &tmp, NULL ) == 0 );
ASSERT_COMPARE( tmp, 100, bufA, 100 );
TEST_ASSERT( mbedtls_reader_commit( &rd ) == 0 );
/* Wrapup (lower layer) */
TEST_ASSERT( mbedtls_reader_reclaim( &rd, NULL ) == 0 );
mbedtls_reader_free( &rd );
}
/* END_CASE */