* add tests for new i/o functions

tests/CMakeLists.txt

@@ -4,5 +4,8 @@ add_test("test/bitmap"   "test-bitmap")
 add_executable("test-record" "record.c")
 add_test("test/record"   "test-record")
 
+add_executable("test-io" "io.c" "../src/database.c" "../src/bitmap.c")
+add_test("test/io" "test-io")
+
 add_executable("test-database" "database.c" "../src/database.c" "../src/bitmap.c")
 add_test("test/database" "test-database")

tests/io.c

@@ -0,0 +1,78 @@
+#include "../src/common.h"
+#include "../src/record.h"
+#include "../src/io.h"
+#include "../src/simdb.h"
+
+int main() {
+  simdb_t *db;
+  simdb_urec_t *data;
+  simdb_urec_t rec[2];
+  char *path = "test.db";
+  int mode = 0, ret = 0;
+
+  unlink(path);
+
+  db = simdb_open(path, mode, &ret);
+  assert(db == NULL);
+  assert(ret == -1); /* no such file */
+
+  ret = simdb_create(path);
+  assert(ret == true);
+
+  db = simdb_open(path, mode, &ret);
+  assert(db != NULL);
+
+  ret = simdb_read(db, 1, 1, &data);
+  assert(ret == 0);
+
+  memset(&rec[0], 0xAA, SIMDB_REC_LEN);
+  memset(&rec[1], 0xAA, SIMDB_REC_LEN);
+  rec[0].used = 1;
+  rec[1].used = 1;
+
+  ret = simdb_write(db, 1, 2, rec);
+  assert(ret == SIMDB_ERR_READONLY); /* database open in read-only mode */
+
+  simdb_close(db);
+
+  mode |= SIMDB_FLAG_WRITE;
+  db = simdb_open(path, mode, &ret);
+  assert(db != NULL);
+
+  ret = simdb_write(db, 1, 2, rec);
+  assert(ret == 2); /* success */
+
+  ret = simdb_read(db, 1, 0, &data);
+  assert(ret == SIMDB_ERR_USAGE);
+
+  ret = simdb_read(db, 0, 0, &data);
+  assert(ret == SIMDB_ERR_USAGE);
+
+  ret = simdb_read(db, 0, 1, &data);
+  assert(ret == SIMDB_ERR_USAGE);
+
+  /* valid request : single record */
+  ret = simdb_read(db, 1, 1, &data);
+  assert(ret == 1);
+  free(data);
+
+  /* valid request : multiple records */
+  ret = simdb_read(db, 1, 2, &data);
+  assert(ret == 2);
+  free(data);
+
+  /* range beyond end of file */
+  ret = simdb_read(db, 1, 4, &data);
+  assert(ret == 2);
+  free(data);
+
+  /* start beyond end of file */
+  ret = simdb_read(db, 3, 4, &data);
+  assert(ret == 0);
+
+  simdb_close(db);
+
+  unlink(path);
+
+  return 0;
+}