func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsAllInstancesErrors(c *gc.C) {
resultErr := fmt.Errorf("oh noes")
s.PatchValue(&s.env.allInstances, func() ([]instance.Instance, error) {
return nil, resultErr
})
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, nil)
c.Assert(err, gc.Equals, resultErr)
c.Assert(zoneInstances, gc.HasLen, 0)
}
func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsInstanceAvailabilityZonesNoInstances(c *gc.C) {
var called int
s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) {
called++
return nil, environs.ErrNoInstances
})
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, nil)
c.Assert(called, gc.Equals, 1)
c.Assert(err, jc.ErrorIsNil)
c.Assert(zoneInstances, gc.HasLen, 2)
}
func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsInstanceAvailabilityZonesErrors(c *gc.C) {
returnErr := fmt.Errorf("whatever")
var called int
s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) {
called++
return nil, returnErr
})
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, nil)
c.Assert(called, gc.Equals, 1)
c.Assert(err, gc.Equals, returnErr)
c.Assert(zoneInstances, gc.HasLen, 0)
}
func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsNoZones(c *gc.C) {
var calls []string
s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) {
c.Assert(ids, gc.DeepEquals, []instance.Id{"inst0", "inst1", "inst2"})
calls = append(calls, "InstanceAvailabilityZoneNames")
return []string{"", "", ""}, nil
})
s.PatchValue(&s.env.availabilityZones, func() ([]common.AvailabilityZone, error) {
calls = append(calls, "AvailabilityZones")
return []common.AvailabilityZone{}, nil
})
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, nil)
c.Assert(calls, gc.DeepEquals, []string{"InstanceAvailabilityZoneNames", "AvailabilityZones"})
c.Assert(err, jc.ErrorIsNil)
c.Assert(zoneInstances, gc.HasLen, 0)
}
func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsInstanceAvailabilityZonesErrors(c *gc.C) {
var returnErr error
var called int
s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) {
called++
return nil, returnErr
})
errors := []error{environs.ErrNoInstances, fmt.Errorf("whatever")}
for i, err := range errors {
returnErr = err
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, nil)
c.Assert(called, gc.Equals, i+1)
c.Assert(err, gc.Equals, returnErr)
c.Assert(zoneInstances, gc.HasLen, 0)
}
}
func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsPartialInstances(c *gc.C) {
var called int
s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) {
c.Assert(ids, gc.DeepEquals, []instance.Id{"nichts", "inst1", "null", "inst2"})
called++
return []string{"", "az1", "", "az1"}, environs.ErrPartialInstances
})
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, []instance.Id{"nichts", "inst1", "null", "inst2"})
c.Assert(called, gc.Equals, 1)
c.Assert(err, jc.ErrorIsNil)
// az2 has fewer instances, so comes first.
c.Assert(zoneInstances, gc.DeepEquals, []common.AvailabilityZoneInstances{{
ZoneName: "az2",
}, {
ZoneName: "az1",
Instances: []instance.Id{"inst1", "inst2"},
}})
}
func (s *AvailabilityZoneSuite) TestAvailabilityZoneAllocationsAllInstances(c *gc.C) {
var called int
s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) {
c.Assert(ids, gc.DeepEquals, []instance.Id{"inst0", "inst1", "inst2"})
called++
return []string{"az0", "az1", "az2"}, nil
})
zoneInstances, err := common.AvailabilityZoneAllocations(&s.env, nil)
c.Assert(called, gc.Equals, 1)
c.Assert(err, jc.ErrorIsNil)
// az0 is unavailable, so az1 and az2 come out as equal best;
// az1 comes first due to lexicographical ordering on the name.
c.Assert(zoneInstances, gc.DeepEquals, []common.AvailabilityZoneInstances{{
ZoneName: "az1",
Instances: []instance.Id{"inst1"},
}, {
ZoneName: "az2",
Instances: []instance.Id{"inst2"},
}})
}