[PATCH] tests: Only format the CPU frequency if it's known

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Instead of formatting 'MHz: 0', which can be confusing, skip the
field altogether. This behavior is consistent with that of 'virsh
nodeinfo'.

Suggested-by: John Ferlan <jferlan@xxxxxxxxxx>
Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
---
 .../linux-aarch64-f21-mustang.expected             |  2 +-
 .../linux-aarch64-rhel74-moonshot.expected         |  2 +-
 .../linux-aarch64-rhelsa-3.19.0-mustang.expected   |  2 +-
 .../linux-armv6l-raspberrypi.expected              |  2 +-
 tests/virhostcputest.c                             | 28 +++++++++++++++++-----
 5 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/tests/virhostcpudata/linux-aarch64-f21-mustang.expected b/tests/virhostcpudata/linux-aarch64-f21-mustang.expected
index ac950dc15..1ee3cf737 100644
--- a/tests/virhostcpudata/linux-aarch64-f21-mustang.expected
+++ b/tests/virhostcpudata/linux-aarch64-f21-mustang.expected
@@ -1 +1 @@
-CPUs: 8/8, MHz: 0, Nodes: 1, Sockets: 4, Cores: 2, Threads: 1
+CPUs: 8/8, Nodes: 1, Sockets: 4, Cores: 2, Threads: 1
diff --git a/tests/virhostcpudata/linux-aarch64-rhel74-moonshot.expected b/tests/virhostcpudata/linux-aarch64-rhel74-moonshot.expected
index 6776aa6c2..1926af836 100644
--- a/tests/virhostcpudata/linux-aarch64-rhel74-moonshot.expected
+++ b/tests/virhostcpudata/linux-aarch64-rhel74-moonshot.expected
@@ -1 +1 @@
-CPUs: 8/8, MHz: 0, Nodes: 1, Sockets: 1, Cores: 8, Threads: 1
+CPUs: 8/8, Nodes: 1, Sockets: 1, Cores: 8, Threads: 1
diff --git a/tests/virhostcpudata/linux-aarch64-rhelsa-3.19.0-mustang.expected b/tests/virhostcpudata/linux-aarch64-rhelsa-3.19.0-mustang.expected
index 6776aa6c2..1926af836 100644
--- a/tests/virhostcpudata/linux-aarch64-rhelsa-3.19.0-mustang.expected
+++ b/tests/virhostcpudata/linux-aarch64-rhelsa-3.19.0-mustang.expected
@@ -1 +1 @@
-CPUs: 8/8, MHz: 0, Nodes: 1, Sockets: 1, Cores: 8, Threads: 1
+CPUs: 8/8, Nodes: 1, Sockets: 1, Cores: 8, Threads: 1
diff --git a/tests/virhostcpudata/linux-armv6l-raspberrypi.expected b/tests/virhostcpudata/linux-armv6l-raspberrypi.expected
index 1c4c713d5..4961316fb 100644
--- a/tests/virhostcpudata/linux-armv6l-raspberrypi.expected
+++ b/tests/virhostcpudata/linux-armv6l-raspberrypi.expected
@@ -1 +1 @@
-CPUs: 1/1, MHz: 0, Nodes: 1, Sockets: 1, Cores: 1, Threads: 1
+CPUs: 1/1, Nodes: 1, Sockets: 1, Cores: 1, Threads: 1
diff --git a/tests/virhostcputest.c b/tests/virhostcputest.c
index d3ee18461..9a1a48098 100644
--- a/tests/virhostcputest.c
+++ b/tests/virhostcputest.c
@@ -32,6 +32,7 @@ linuxTestCompareFiles(const char *cpuinfofile,
                       const char *outputfile)
 {
     int ret = -1;
+    virBuffer buf = VIR_BUFFER_INITIALIZER;
     char *actualData = NULL;
     virNodeInfo nodeinfo;
     FILE *cpuinfo;
@@ -57,20 +58,35 @@ linuxTestCompareFiles(const char *cpuinfofile,
     }
     VIR_FORCE_FCLOSE(cpuinfo);
 
-    if (virAsprintf(&actualData,
-                    "CPUs: %u/%u, MHz: %u, Nodes: %u, Sockets: %u, "
-                    "Cores: %u, Threads: %u\n",
-                    nodeinfo.cpus, VIR_NODEINFO_MAXCPUS(nodeinfo),
-                    nodeinfo.mhz, nodeinfo.nodes, nodeinfo.sockets,
-                    nodeinfo.cores, nodeinfo.threads) < 0)
+    virBufferAsprintf(&buf,
+                      "CPUs: %u/%u, ",
+                      nodeinfo.cpus, VIR_NODEINFO_MAXCPUS(nodeinfo));
+
+    /* Only format the CPU frequency if it's known. This behavior is
+     * consistent with that of 'virsh nodeinfo' */
+    if (nodeinfo.mhz) {
+        virBufferAsprintf(&buf,
+                          "MHz: %u, ",
+                          nodeinfo.mhz);
+    }
+
+    virBufferAsprintf(&buf,
+                      "Nodes: %u, Sockets: %u, Cores: %u, Threads: %u\n",
+                      nodeinfo.nodes, nodeinfo.sockets,
+                      nodeinfo.cores, nodeinfo.threads);
+
+    if (virBufferError(&buf))
         goto fail;
 
+    actualData = virBufferContentAndReset(&buf);
+
     if (virTestCompareToFile(actualData, outputfile) < 0)
         goto fail;
 
     ret = 0;
 
  fail:
+    virBufferFreeAndReset(&buf);
     VIR_FREE(actualData);
     return ret;
 }
-- 
2.14.3

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