Increase code coverage to 70%

[vaikas]

Expected Behavior

Stated goal for the V0.2 release is >70% test coverage.

Actual Behavior

Some packages do not meet this goal.
I used this to create the list:
https://testgrid.knative.dev/knative-eventing#coverage&sort-by-failures=

This is a list of those packages. We are using the checklist here to keep track of which ones are being worked on. So, if you take one, check the box and comment on who's taking it so we don't duplicate the work.

• github.com/knative/eventing/pkg/apis/eventing/v1alpha1/register.go
• github.com/knative/eventing/pkg/buses/message_receiver.go
• github.com/knative/eventing/pkg/controller/eventing/inmemory/channel/controller.go
• github.com/knative/eventing/pkg/controller/eventing/inmemory/controller/main.go
• github.com/knative/eventing/pkg/controller/eventing/subscription/provider.go
• github.com/knative/eventing/pkg/controller/eventing/subscription/reconcile.go
• github.com/knative/eventing/pkg/controller/names.go
• github.com/knative/eventing/pkg/controller/owner_references.go
• github.com/knative/eventing/pkg/controller/testing/mock_client.go
• github.com/knative/eventing/pkg/controller/testing/table.go
• github.com/knative/eventing/pkg/sidecar/configmap/filesystem/filesystem_watcher.go
• github.com/knative/eventing/pkg/apis/eventing/v1alpha1/subscribable_channelable_validation.go
• github.com/knative/eventing/pkg/controller/eventing/inmemory/clusterchannelprovisioner/controller.go
• github.com/knative/eventing/cmd/controller/controller-runtime-main.go
• github.com/knative/eventing/cmd/controller/main.go
• github.com/knative/eventing/cmd/fanoutsidecar/main.go
• github.com/knative/eventing/cmd/sendevent/main.go
• github.com/knative/eventing/cmd/webhook/main.go
• github.com/knative/eventing/pkg/apis/duck/v1alpha1/subscribable_types.go

[grantr]

#592 fixes a few.

[vaikas]

should /pkg/controller/testing/* be included in the coverage?

[vaikas]

I'll takle pkg/controller/eventing/subscription/reconcile.go

[srvaroa]

Just posted #597 for github.com/knative/eventing/pkg/apis/eventing/v1alpha1/subscribable_channelable_validation.go

[srvaroa]

@vaikas-google I suspect I misused the Fixes label in #597 and prow closed this as a side effect, it should be reopened I guess?