test case update follow the regualtor framework

Signed-off-by: dulibo1 <[email protected]>

Author: dulibo1

testing/drivertest/drivertest_regulator.c

@@ -446,18 +446,17 @@ static void test_regulator_supply_4(FAR void **state)
                                              &g_fake_regulator);
   assert_false(NULL == g_fake_regulator.rdev);
   test = regulator_get(REGULATOR_ID);
-  assert_false(NULL == test);
+  assert_true(NULL == test);
   g_fake_regulator_supply.state = 0;
-  ret = regulator_enable(test);
-  assert_true(ret < 0);
   g_fake_regulator_supply.rdev = regulator_register(
                                              &g_fake_regulator_supply_desc,
                                              &g_fake_regulator_ops,
                                              &g_fake_regulator_supply);
   assert_false(NULL == g_fake_regulator_supply.rdev);
   assert_int_equal(g_fake_regulator_supply.state, 0);
   assert_int_equal(g_fake_regulator.state, 0);
-
+  test = regulator_get(REGULATOR_ID);
+  assert_false(NULL == test);
   while (cnt--)
     {
       ret = regulator_enable(test);
@@ -499,6 +498,7 @@ static void test_regulator_mode(FAR void **state)
   int ret = 0;
 
   g_fake_regulator.lpmode = 0;
+  g_fake_regulator_desc.supply_name = NULL;
   g_fake_regulator.rdev = regulator_register(&g_fake_regulator_desc,
                                              &g_fake_regulator_ops,
                                              &g_fake_regulator);