tests: acpi: test short OEM_ID/OEM_TABLE_ID values in test_oem_fields()

Previous patch [1] added explicit whitespace padding to OEM_ID/OEM_TABLE_ID
values used in test_oem_fields() testcase to avoid false positive and
bisection issues when QEMU is switched to \0' padding. As result
testcase ceased to test values that were shorter than max possible
length values.

Update testcase to make sure that it's testing shorter IDs like it
used to before [2].

1) "tests: acpi: manually pad OEM_ID/OEM_TABLE_ID for  test_oem_fields() test"
2) 602b458 ("acpi: Permit OEM ID and OEM table ID fields to be changed")

Signed-off-by: Igor Mammedov <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>

Author: Igor Mammedov

tests/qtest/bios-tables-test.c

@@ -71,10 +71,10 @@
 
 #define ACPI_REBUILD_EXPECTED_AML "TEST_ACPI_REBUILD_AML"
 
-#define OEM_ID             "TEST  "
-#define OEM_TABLE_ID       "OEM     "
-#define OEM_TEST_ARGS      "-machine x-oem-id='" OEM_ID "',x-oem-table-id='" \
-                           OEM_TABLE_ID "'"
+#define OEM_ID             "TEST"
+#define OEM_TABLE_ID       "OEM"
+#define OEM_TEST_ARGS      "-machine x-oem-id=" OEM_ID ",x-oem-table-id=" \
+                           OEM_TABLE_ID
 
 typedef struct {
     bool tcg_only;
@@ -1530,8 +1530,8 @@ static void test_oem_fields(test_data *data)
             continue;
         }
 
-        g_assert(memcmp(sdt->aml + 10, OEM_ID, 6) == 0);
-        g_assert(memcmp(sdt->aml + 16, OEM_TABLE_ID, 8) == 0);
+        g_assert(strncmp((char *)sdt->aml + 10, OEM_ID, 6) == 0);
+        g_assert(strncmp((char *)sdt->aml + 16, OEM_TABLE_ID, 8) == 0);
     }
 }