Function main

common/test/run-features.c:250–338

}

int main(int argc, char *argv[])
{
	u8 *bits;
	struct feature_set *fset;

	common_setup(argv[0]);

	/* Just some bits to set. */
	fset = feature_set_for_feature(tmpctx,
				       OPTIONAL_FEATURE(OPT_DATA_LOSS_PROTECT));

	bits = tal_arr(tmpctx, u8, 0);
	for (size_t i = 0; i < 100; i += 3)
		set_feature_bit(&bits, i);
	for (size_t i = 0; i < 100; i++)
		assert(test_bit(bits, i / 8, i % 8) == ((i % 3) == 0));

	for (size_t i = 0; i < 100; i++)
		assert(feature_is_set(bits, i) == ((i % 3) == 0));

	/* Simple test: single byte */
	bits = tal_arr(tmpctx, u8, 1);

	/* Compulsory feature */
	bits[0] = (1 << 0);
	assert(feature_offered(bits, 0));
	assert(!feature_offered(bits, 2));
	assert(!feature_offered(bits, 8));
	assert(!feature_offered(bits, 16));

	/* Optional feature */
	bits[0] = (1 << 1);
	assert(feature_offered(bits, 0));
	assert(!feature_offered(bits, 2));
	assert(!feature_offered(bits, 8));
	assert(!feature_offered(bits, 16));

	/* Endian-sensitive test: big-endian means we frob last byte here */
	bits = tal_arrz(tmpctx, u8, 2);

	bits[1] = (1 << 0);
	assert(feature_offered(bits, 0));
	assert(!feature_offered(bits, 2));
	assert(!feature_offered(bits, 8));
	assert(!feature_offered(bits, 16));

	/* Optional feature */
	bits[1] = (1 << 1);
	assert(feature_offered(bits, 0));
	assert(!feature_offered(bits, 2));
	assert(!feature_offered(bits, 8));
	assert(!feature_offered(bits, 16));

	/* We always support no features. */
	memset(bits, 0, tal_count(bits));
	assert(features_unsupported(fset, bits, INIT_FEATURE) == -1);

	/* We must support our own features. */