Add test for max size

Tests #22

src/fellow_cache.c

@@ -5538,6 +5538,7 @@ t_cache(unsigned chksum)
 	const size_t memsz = 10 * 1024 * 1024;
 	const size_t dsksz = 100 * 1024 * 1024;
 	const size_t objsize_hint = 1 * 1024 * 1024;
+	struct fellow_cache_res fcr;
 
 	DBGSZ(fellow_disk_seg);
 	DBGSZ(fellow_disk_seglist);
@@ -5601,6 +5602,26 @@ t_cache(unsigned chksum)
 	test_bocdone(fbo, TRUST_ME(hash), 1);
 	fellow_cache_obj_deref(fc, fco);
 
+	// === hit objsize_max
+	fbo = fellow_busy_obj_alloc(fc, &fco, &priv2, 1234).r.ptr;
+	CHECK_OBJ_NOTNULL(fbo, FELLOW_BUSY_MAGIC);
+	do {
+		char *ptr;
+
+		sz = 1234;
+		fcr = fellow_busy_obj_getspace(fbo, &sz, (uint8_t **)&ptr);
+		if (fcr.status == fcr_ok) {
+			fellow_busy_obj_extend(fbo, sz);
+			continue;
+		}
+		assert(fcr.status == fcr_allocerr);
+		AZ(strcmp(fcr.r.err, "objsize_max reached"));
+	} while (fcr.status == fcr_ok);
+
+	fellow_busy_obj_trimstore(fbo);
+	test_bocdone(fbo, TRUST_ME(hash), 1);
+	fellow_cache_obj_deref(fc, fco);
+
 	test_fellow_cache_unbusy_inject(fc);
 
 	// === alloc, then evict