[PATCH spice-server 1/2] Fixup display info test

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Rather than showing the expected data in raw format (ascii codes, etc),
which is hard to verify, show the characters themselves, and group them
by structure.

Also add a few more comments.
---
 server/tests/test-stream-device.c | 35 +++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 9 deletions(-)

diff --git a/server/tests/test-stream-device.c b/server/tests/test-stream-device.c
index cb3a1a4ff..dcdd91896 100644
--- a/server/tests/test-stream-device.c
+++ b/server/tests/test-stream-device.c
@@ -493,7 +493,8 @@ static void test_stream_device_data_message(TestFixture *fixture, gconstpointer
 
 static void test_display_info(TestFixture *fixture, gconstpointer user_data)
 {
-    // build a message for the streaming device
+    // craft a message from the mock stream device that provides display info to the server for the
+    // given stream
     static const char address[] = "pci/a/b.cde";
     StreamMsgDeviceDisplayInfo info = {
         .stream_id = GUINT32_TO_LE(0x01020304),
@@ -510,11 +511,13 @@ static void test_display_info(TestFixture *fixture, gconstpointer user_data)
     *message_sizes_end = p - message;
     ++message_sizes_end;
 
-    // parse the message we crafted
+    // parse the simulated display info message from the stream device so the server now has display
+    // info for the mock stream device
     test_kick();
 
     // initialize a QXL interface
     test_add_display_interface(test);
+    /* qxl device supports 2 monitors */
     spice_qxl_set_device_info(&test->qxl_instance, "pci/0/1.2", 0, 2);
 
     // build the buffer to send to the agent for display information
@@ -524,14 +527,28 @@ static void test_display_info(TestFixture *fixture, gconstpointer user_data)
     size_t buf_len;
     uint8_t *buf = spice_marshaller_linearize(m, 0, &buf_len, &to_free);
 
-    // check output buffer
+    // check output buffer. The message that we send to the vdagent should combine display info for
+    // the stream device that we crafted above and the qxl device.
     static const uint8_t expected_buffer[] = {
-          3,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
-         10,  0,  0,  0,112, 99,105, 47, 48, 47, 49, 46, 50,  0,  0,  0,
-          0,  0,  1,  0,  0,  0,  1,  0,  0,  0, 10,  0,  0,  0,112, 99,
-        105, 47, 48, 47, 49, 46, 50,  0,  0,  0,  0,  0,  4,  3,  2,  1,
-         13, 12, 11, 10, 12,  0,  0,  0,112, 99,105, 47, 97, 47, 98, 46,
-         99,100,101,  0
+          /* device count */        3,  0,  0,  0,
+
+          /* channel_id */          0,  0,  0,  0,
+          /* monitor_id */          0,  0,  0,  0,
+          /* device_display_id */   0,  0,  0,  0,
+          /* device_address_len */ 10,  0,  0,  0,
+          /* device_address */    'p','c','i','/','0','/','1','.','2',  0,
+
+          /* channel_id */          0,  0,  0,  0,
+          /* monitor_id */          1,  0,  0,  0,
+          /* device_display_id */   1,  0,  0,  0,
+          /* device_address_len */ 10,  0,  0,  0,
+          /* device_address */    'p','c', 'i','/','0','/','1','.','2',  0,
+
+          /* channel_id */          0,  0,  0,  0,
+          /* monitor_id */          4,  3,  2,  1,
+          /* device_display_id */  13, 12, 11, 10,
+          /* device_address_len */ 12,  0,  0,  0,
+          /* device_address */    'p','c','i','/','a','/','b','.','c','d','e',  0
     };
     g_assert_cmpint(buf_len, ==, sizeof(expected_buffer));
     g_assert_true(memcmp(buf, expected_buffer, buf_len) == 0);
-- 
2.17.2

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