Fix regular expression for uptime in hypervisor show

Hypervisor show command has a few bugs as follows.
- It doesn't trim an extra whitespace in the head of uptime
  information.
- It doesn't display uptime information when the number of user is 1.

This patch fixes the regular expression to match uptime information.

Change-Id: Ic2f7fd9a9274466717084a0886f95f78e98a9007
Closes-Bug: 1611809

openstackclient/compute/v2/hypervisor.py

@@ -98,8 +98,9 @@ class ShowHypervisor(command.ShowOne):
         # Extract data from uptime value
         # format: 0 up 0,  0 users,  load average: 0, 0, 0
         # example: 17:37:14 up  2:33,  3 users,  load average: 0.33, 0.36, 0.34
-        m = re.match("(.+)\sup\s+(.+),\s+(.+)\susers,\s+load average:\s(.+)",
-                     uptime['uptime'])
+        m = re.match(
+            "\s*(.+)\sup\s+(.+),\s+(.+)\susers?,\s+load average:\s(.+)",
+            uptime['uptime'])
         if m:
             hypervisor["host_time"] = m.group(1)
             hypervisor["uptime"] = m.group(2)

openstackclient/tests/unit/compute/v2/test_hypervisor.py

@@ -159,10 +159,12 @@ class TestHypervisorShow(TestHypervisor):
             'free_disk_gb',
             'free_ram_mb',
             'host_ip',
+            'host_time',
             'hypervisor_hostname',
             'hypervisor_type',
             'hypervisor_version',
             'id',
+            'load_average',
             'local_gb',
             'local_gb_used',
             'memory_mb',
@@ -172,6 +174,8 @@ class TestHypervisorShow(TestHypervisor):
             'service_id',
             'state',
             'status',
+            'uptime',
+            'users',
             'vcpus',
             'vcpus_used',
         )
@@ -183,10 +187,12 @@ class TestHypervisorShow(TestHypervisor):
             50,
             1024,
             '192.168.0.10',
+            '01:28:24',
             self.hypervisor.hypervisor_hostname,
             'QEMU',
             2004001,
             self.hypervisor.id,
+            '0.94, 0.62, 0.50',
             50,
             0,
             1024,
@@ -196,6 +202,8 @@ class TestHypervisorShow(TestHypervisor):
             1,
             'up',
             'enabled',
+            '3 days, 11:15',
+            '1',
             4,
             0,
         )