add GetFamilyName() functionality in skewer (#11)

data_test.go

@@ -108,6 +108,9 @@ func Test_Data(t *testing.T) {
 					if name := sku.GetName(); !strings.EqualFold(name, "standard_d4s_v3") {
 						t.Errorf("expected standard_d4s_v3 to have name standard_d4s_v3, got: '%s'", name)
 					}
+					if skuFamily := sku.GetFamilyName(); !strings.EqualFold(skuFamily, "standardDSv3Family") {
+						t.Errorf("expected standard_d4s_v3 to have name standardDSv3Family, got: '%s'", skuFamily)
+					}
 					if resourceType := sku.GetResourceType(); resourceType != VirtualMachines {
 						t.Errorf("expected standard_d4s_v3 to have resourceType virtual machine, got: '%s'", resourceType)
 					}
@@ -180,6 +183,9 @@ func Test_Data(t *testing.T) {
 					if name := sku.GetName(); !strings.EqualFold(name, "standard_d2_v2") {
 						t.Errorf("expected standard_d2_v2 to have name standard_d2_v2, got: '%s'", name)
 					}
+					if skuFamily := sku.GetFamilyName(); !strings.EqualFold(skuFamily, "standardDv2Family") {
+						t.Errorf("expected standard_d2_v2 to have name standardDv2Family, got: '%s'", skuFamily)
+					}
 					if resourceType := sku.GetResourceType(); resourceType != VirtualMachines {
 						t.Errorf("expected standard_d2_v2 to have resourceType virtual machine, got: '%s'", resourceType)
 					}

sku.go

@@ -368,6 +368,17 @@ func (s *SKU) GetName() string {
 	return *s.Name
 }
 
+// GetFamilyName returns the family name of this resource sku. It normalizes pointers
+// to the empty string for comparison purposes. For example,
+// "standardDSv2Family" for a virtual machine.
+func (s *SKU) GetFamilyName() string {
+	if s.Family == nil {
+		return ""
+	}
+
+	return *s.Family
+}
+
 // GetLocation returns the location for a given SKU.
 func (s *SKU) GetLocation() (string, error) {
 	if s.Locations == nil {