lib/simctl/command/list.rb in simctl-1.4.1 vs lib/simctl/command/list.rb in simctl-1.5.0

@@ -1,6 +1,8 @@
 module SimCtl
+  class DeviceTypeNotFound < StandardError; end
+  class RuntimeNotFound < StandardError; end
   class Command
     module List
       COMMAND = %w[xcrun simctl list -j]
 
       # Find a device
@@ -12,13 +14,14 @@
       end
 
       # Find a device type
       #
       # @param filter [Hash] the filter
-      # @return [SimCtl::DeviceType, nil] the device type matching the given filter
+      # @return [SimCtl::DeviceType] the device type matching the given filter
+      # @raise [DeviceTypeNotFound] if the device type could not be found
       def devicetype(filter)
-        list_devicetypes.where(filter).first
+        list_devicetypes.where(filter).first or raise DeviceTypeNotFound.new("Could not find a device type matching #{filter.inspect}")
       end
 
       # List all devices
       #
       # @return [SimCtl::List] a list of SimCtl::Device objects
@@ -47,12 +50,13 @@
       end
 
       # Find a runtime
       #
       # @param filter [Hash] the filter
-      # @return [SimCtl::Runtime, nil] the runtime matching the given filter
+      # @return [SimCtl::Runtime] the runtime matching the given filter
+      # @raise [RuntimeNotFound] if the runtime could not be found
       def runtime(filter)
-        list_runtimes.where(filter).first
+        list_runtimes.where(filter).first or raise RuntimeNotFound.new("Could not find a runtime matching #{filter.inspect}")
       end
 
     end
   end
 end