instruction_class_spec.rb in nudge-0.2.0

- old
+ new

@@ -13,10 +13,11 @@
     # will be a list of every type subclassed from Instruction
     Instruction.all_instructions.should include(IntAddInstruction)
   end
 end
 
+
 describe "capturing errors" do
   describe "NotEnoughStackItems" do
     describe "#preconditions?" do
       it "should push an :error ValuePoint onto the :error stacks when NotEnoughStackItems is raised" do
         context = Interpreter.new
@@ -34,7 +35,18 @@
       i1 = TestingInterdependencyInstruction.new(context)
       lambda{i1.go}.should_not raise_error
       context.stacks[:error].peek.blueprint.should include "needs IntAddInstruction"
     end
   end
-  
+end
+
+
+describe ":code stack has a special rule" do
+  it "should be impossible to use #pushes to push a :code item that is too large for the context" do
+    small_box = Interpreter.new("block {}", code_char_limit:20)
+    small_code = ValuePoint.new("code","block { do a }")
+    long_code = ValuePoint.new("code","block { do a do b do c do d do e do f do g }")
+    throwaway = IntAddInstruction.new(small_box)
+    lambda{throwaway.pushes(:code, long_code)}.should raise_error(Instruction::CodeOversizeError)
+    lambda{throwaway.pushes(:code, small_code)}.should_not raise_error(Instruction::CodeOversizeError)
+  end
 end
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