[libvirt] [PATCH 3/3] tests: deterministichash: Make hash tables arch-independent

[Peter Krempa]

It turns out that our implementation of the hashing function is
endian-dependent and thus if used on various architectures the testsuite
may have different results. Work this around by mocking virHashCodeGen
to something which does not use bit operations instead of just setting a
deterministic seed.
---
 .../qemumonitorjson-nodename-relative.result       | 24 +++++++++++-----------
 .../qemumonitorjson-nodename-same-backing.result   | 24 +++++++++++-----------
 tests/virdeterministichashmock.c                   | 17 +++++++++++----
 tests/virmacmaptestdata/simple2.json               | 12 +++++------
 4 files changed, 43 insertions(+), 34 deletions(-)

diff --git a/tests/qemumonitorjsondata/qemumonitorjson-nodename-relative.result b/tests/qemumonitorjsondata/qemumonitorjson-nodename-relative.result
index 6c0c77618..5288319d3 100644
--- a/tests/qemumonitorjsondata/qemumonitorjson-nodename-relative.result
+++ b/tests/qemumonitorjsondata/qemumonitorjson-nodename-relative.result
@@ -1,15 +1,3 @@
-drive-ide0-0-1
-filename    : '/var/lib/libvirt/images/relsnap.qcow2'
-format node : '#block1290'
-format drv  : 'qcow2'
-storage node: '#block1107'
-storage drv : 'file'
-  filename    : '/var/lib/libvirt/images/base.qcow2'
-  format node : '#block927'
-  format drv  : 'qcow2'
-  storage node: '#block800'
-  storage drv : 'file'
-
 drive-ide0-0-0
 filename    : '/var/lib/libvirt/images/img3'
 format node : '#block118'
@@ -31,3 +19,15 @@ storage drv : 'file'
       format drv  : 'qcow2'
       storage node: '#block614'
       storage drv : 'file'
+
+drive-ide0-0-1
+filename    : '/var/lib/libvirt/images/relsnap.qcow2'
+format node : '#block1290'
+format drv  : 'qcow2'
+storage node: '#block1107'
+storage drv : 'file'
+  filename    : '/var/lib/libvirt/images/base.qcow2'
+  format node : '#block927'
+  format drv  : 'qcow2'
+  storage node: '#block800'
+  storage drv : 'file'
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-nodename-same-backing.result b/tests/qemumonitorjsondata/qemumonitorjson-nodename-same-backing.result
index 87431f7ca..7b12a1746 100644
--- a/tests/qemumonitorjsondata/qemumonitorjson-nodename-same-backing.result
+++ b/tests/qemumonitorjsondata/qemumonitorjson-nodename-same-backing.result
@@ -1,15 +1,3 @@
-drive-sata0-0-1
-filename    : '/var/lib/libvirt/images/b.qcow2'
-format node : '#block548'
-format drv  : 'qcow2'
-storage node: '#block487'
-storage drv : 'file'
-  filename    : '/var/lib/libvirt/images/base.qcow2'
-  format node : '#block771'
-  format drv  : 'qcow2'
-  storage node: '#block692'
-  storage drv : 'file'
-
 drive-sata0-0-0
 filename    : '/var/lib/libvirt/images/a.qcow2'
 format node : '#block132'
@@ -21,3 +9,15 @@ storage drv : 'file'
   format drv  : 'qcow2'
   storage node: '#block224'
   storage drv : 'file'
+
+drive-sata0-0-1
+filename    : '/var/lib/libvirt/images/b.qcow2'
+format node : '#block548'
+format drv  : 'qcow2'
+storage node: '#block487'
+storage drv : 'file'
+  filename    : '/var/lib/libvirt/images/base.qcow2'
+  format node : '#block771'
+  format drv  : 'qcow2'
+  storage node: '#block692'
+  storage drv : 'file'
diff --git a/tests/virdeterministichashmock.c b/tests/virdeterministichashmock.c
index d01f1c9e4..cd80cfcb5 100644
--- a/tests/virdeterministichashmock.c
+++ b/tests/virdeterministichashmock.c
@@ -20,10 +20,19 @@

 #include <config.h>

-#include "virrandom.h"
+#include "util/virhashcode.h"

-uint64_t virRandomBits(int nbits ATTRIBUTE_UNUSED)
+uint32_t
+virHashCodeGen(const void *key,
+               size_t len,
+               uint32_t seed ATTRIBUTE_UNUSED)
 {
-    return 4; /* chosen by fair dice roll.
-                 guaranteed to be random. */
+    const uint8_t *k = key;
+    uint32_t h = 0;
+    size_t i;
+
+    for (i = 0; i < len; i++)
+        h += k[i];
+
+    return h;
 }
diff --git a/tests/virmacmaptestdata/simple2.json b/tests/virmacmaptestdata/simple2.json
index 91b2cde0c..52132c241 100644
--- a/tests/virmacmaptestdata/simple2.json
+++ b/tests/virmacmaptestdata/simple2.json
@@ -1,16 +1,16 @@
 [
   {
-    "domain": "f25",
+    "domain": "f24",
     "macs": [
-      "00:11:22:33:44:55",
-      "aa:bb:cc:00:11:22"
+      "aa:bb:cc:dd:ee:ff",
+      "a1:b2:c3:d4:e5:f6"
     ]
   },
   {
-    "domain": "f24",
+    "domain": "f25",
     "macs": [
-      "aa:bb:cc:dd:ee:ff",
-      "a1:b2:c3:d4:e5:f6"
+      "00:11:22:33:44:55",
+      "aa:bb:cc:00:11:22"
     ]
   }
 ]
-- 
2.13.2