tags were documented, just not implemented
TF_ACC=1 go test ./builtin/providers/azurerm -v -run TestAccAzureRMDnsZone_ -timeout 120m
=== RUN TestAccAzureRMDnsZone_importBasic
--- PASS: TestAccAzureRMDnsZone_importBasic (89.04s)
=== RUN TestAccAzureRMDnsZone_basic
--- PASS: TestAccAzureRMDnsZone_basic (92.91s)
=== RUN TestAccAzureRMDnsZone_withTags
--- PASS: TestAccAzureRMDnsZone_withTags (105.88s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/azurerm 287.912s
Some azurerm resources store resource_group_name in lowercase only.
Other store resource_group_name using lower and upper case.
Ensure that all test cases use capitalisation in resource_group_name
to find errors in diffs due to capitalisation.
Some resource_group_name were refactored to match naming scheme
across the azurerm tests.
This resource is the first which makes use of the new Riviera library
(at https://github.com/jen20/riviera), so there is some additional set
up work to add the provider to the client which gets passed among
resources.