* add tests for record's packed struct

tests/CMakeLists.txt

@@ -1,5 +1,8 @@
 add_executable("test-bitmap" "bitmap.c" "../src/bitmap.c")
 add_test("test/bitmap"   "test-bitmap")
 
+add_executable("test-record" "record.c")
+add_test("test/record"   "test-record")
+
 add_executable("test-database" "database.c" "../src/database.c" "../src/bitmap.c")
 add_test("test/database" "test-database")

tests/record.c

@@ -0,0 +1,38 @@
+#include "../src/common.h"
+#include "../src/simdb.h"
+#include "../src/record.h"
+
+#include <arpa/inet.h> /* htons */
+
+int
+main() {
+  simdb_urec_t r;
+
+  memset(&r, 0x0, sizeof(r));
+
+  assert(sizeof(r) == SIMDB_REC_LEN);
+
+  r.used = 0xFF;
+  r.clevel_r = 0x52; /* 'R' */
+  r.clevel_g = 0x47; /* 'G' */
+  r.clevel_b = 0x42; /* 'B' */
+  r.image_w  = htons(1024);
+  r.image_h  = htons(768);
+  memset(r.bitmap, 0xA5, sizeof(r.bitmap));
+
+  /* note: htons() used here only for portability, *
+   * in real database it's not used                */
+
+  unsigned char bytes[SIMDB_REC_LEN] = {
+    0xFF, 0x52, 0x47, 0x42, 0x04, 0x00, 0x03, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5,
+    0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5,
+    0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5,
+    0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5, 0xA5,
+  };
+
+  assert(memcmp(&r, bytes, sizeof(r)) == 0);
+
+  return 0;
+}