Add QTest testcase for the Intel Hexadecimal

'test.hex' file is a memory test pattern stored in Hexadecimal Object
Format.  It loads at 0x10000 in RAM and contains values from 0 through
255.

The test case verifies that the expected memory test pattern was loaded.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Suggested-by: Steffen Gortz <qemu.ml@steffen-goertz.de>
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Su Hang <suhang16@mails.ucas.ac.cn>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
[PMM: changed qtest_startf() to qtest_initf() to work with
 current master after the refactoring in commit 88b988c895]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

tests/hexloader-test.c

@@ -0,0 +1,45 @@
+/*
+ * QTest testcase for the Intel Hexadecimal Object File Loader
+ *
+ * Authors:
+ *  Su Hang <suhang16@mails.ucas.ac.cn> 2018
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+
+/* Load 'test.hex' and verify that the in-memory contents are as expected.
+ * 'test.hex' is a memory test pattern stored in Hexadecimal Object
+ * format.  It loads at 0x10000 in RAM and contains values from 0 through
+ * 255.
+ */
+static void hex_loader_test(void)
+{
+    unsigned int i;
+    const unsigned int base_addr = 0x00010000;
+
+    QTestState *s = qtest_initf(
+        "-M vexpress-a9 -nographic -device loader,file=tests/hex-loader-check-data/test.hex");
+
+    for (i = 0; i < 256; ++i) {
+        uint8_t val = qtest_readb(s, base_addr + i);
+        g_assert_cmpuint(i, ==, val);
+    }
+    qtest_quit(s);
+}
+
+int main(int argc, char **argv)
+{
+    int ret;
+
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_func("/tmp/hex_loader", hex_loader_test);
+    ret = g_test_run();
+
+    return ret;
+}