clearer organization for compiler tests

was slightly messy with small/large
now needed different test for expression and statements

test/compiler/fragments/test_while_fibo.rb

@@ -0,0 +1,48 @@
+require_relative 'helper'
+
+class TestWhileFragment < MiniTest::Test
+  include Fragments
+
+  def test_while_fibo
+    @string_input = <<HERE
+class Object
+  int fibonaccit(int n)
+        int a = 0
+        int b = 1
+        while( n > 1 )
+          int tmp = a
+          a = b
+          b = tmp + b
+          n = n - 1
+        end
+        b.putint()
+        return b
+  end
+
+  int main()
+    fibonaccit( 10 )
+  end
+end
+HERE
+  @expect =  [ [Virtual::MethodEnter,Register::GetSlot,Virtual::Set,Virtual::Set,
+                Virtual::Set,Virtual::Set,Virtual::MethodCall] ,[Virtual::MethodReturn] ]
+    check
+  end
+
+  # a hand coded version of the fibonachi numbers (moved to kernel to be able to call it)
+  #  not my hand off course, found in the net from a basic introduction
+  def ttest_kernel_fibo
+    int = Register::Integer.new(Virtual::RegisterMachine.instance.receiver_register)
+    fibo  = @object_space.get_class_by_name(:Object).resolve_method(:fibo)
+    main = @object_space.main
+    main.mov int , 10
+    main.call( fibo )
+    main.mov( Virtual::RegisterMachine.instance.receiver_register , Virtual::RegisterMachine.instance.return_register )
+    putint = @object_space.get_class_by_name(:Object).resolve_method(:putint)
+    main.call( putint )
+    @should = [0x0,0x40,0x2d,0xe9,0x1,0x0,0x52,0xe3,0x2,0x0,0xa0,0xd1,0x7,0x0,0x0,0xda,0x1,0x30,0xa0,0xe3,0x0,0x40,0xa0,0xe3,0x4,0x30,0x83,0xe0,0x4,0x40,0x43,0xe0,0x1,0x20,0x42,0xe2,0x1,0x0,0x52,0xe3,0xfa,0xff,0xff,0x1a,0x3,0x0,0xa0,0xe1,0x0,0x80,0xbd,0xe8]
+    @target = [:Object , :fibo]
+    write "fibo"
+  end
+
+end