Annotate TypeErrors

Several locations which through TypeError on invalid argument now further
explain the error.

1 files changed, 7 insertions, 7 deletions

diff --git a/state.rb b/state.rb
index bbae606..cf54f75 100644
--- a/state.rb
+++ b/state.rb
@@ -122,7 +122,7 @@ class State
 		hold = Hold::Dep.new(hold) if hold.is_a? State
 		hold = Hold::User.new(params) if hold == :user
 		hold = Hold::System.new(params) if hold == :system
-		raise TypeError unless hold.is_a? Hold
+		raise TypeError, "Invalid hold specifier" unless hold.is_a? Hold
 		if @status == :down and self.class.hold_provides.size > 0
 			return self.fork(hold)
 		end
@@ -158,7 +158,7 @@ class State
 		hold = Hold::Dep.new(hold) if hold.is_a? State
 		hold = Hold::User.new(params) if hold == :user
 		hold = Hold::System.new(params) if hold == :system
-		raise TypeError unless hold.is_a? Hold
+		raise TypeError, "Invalid hold specifier" unless hold.is_a? Hold
 		@holds.reject!{ |x| hold == x }
 		drop if @holds.size == 0
 		self
@@ -241,7 +241,7 @@ class State
 	# Handle the occurance of an event. This method is not defined in subclasses
 	# of State.
 	def State.process_event(event)
-		raise TypeError unless event.is_a? Event
+		raise TypeError, "Argument must be an Event" unless event.is_a? Event
 		count = 0
 		@@states.select{ |x| x.status == :down }.each do |x|
 			next unless x.react_to? event
@@ -324,7 +324,7 @@ class Hold
 	# +params+ should be a hash of parameters.
 	def initialize(params = {})
 		raise NoMethodError if self.class == Hold
-		raise TypeError unless params.is_a? Hash
+		raise TypeError, "Parameters must be a hash" unless params.is_a? Hash
 		@params = params
 	end
 
@@ -355,7 +355,7 @@ class Hold
 	class Dep < Hold
 		# +dependent+ must be an object of type State
 		def initialize(dependent)
-			raise TypeError unless dependent.is_a? State
+			raise TypeError, "Dependent must be a State" unless dependent.is_a? State
 			@dependent = dependent
 		end
 
@@ -398,8 +398,8 @@ class Dependency
 	# parameters. The parameters in the hash can be string values to match or
 	# Regex objects
 	def initialize(stateclass, params = {}, remap = {})
-		raise TypeError unless State > stateclass
-		raise TypeError unless params.is_a? Hash
+		raise TypeError, "Class must be a State Class" unless State > stateclass
+		raise TypeError, "Params must be a hash" unless params.is_a? Hash
 		@stateclass = stateclass
 		@params = params
 		@remap = remap