fix call expression tests

test/typed/expressions/test_all.rb

@@ -1,4 +1,4 @@
 require_relative "test_basic"
 require_relative "test_field_access"
 require_relative "test_ops"
-#require_relative "test_call"
+require_relative "test_call"

test/typed/expressions/test_call.rb

@@ -3,6 +3,7 @@ require_relative "helper"
 module Register
   class TestCall < MiniTest::Test
     include ExpressionHelper
+    include AST::Sexp
 
     def setup
       Register.machine.boot
@@ -10,28 +11,28 @@ module Register
     end
 
     def test_call_main_plain
-      @input    = 'main()'
+      @input    = s(:call,  s(:name, :main),  s(:arguments))
       check
     end
 
     def test_call_main_int
-      @input    =  'main(1)'
+      @input    =  s(:call,  s(:name, :main),  s(:arguments , s(:int, 1)))
       check
     end
 
     def test_call_main_string
-      @input    = 'main("1")'
+      @input    =  s(:call,  s(:name, :main),  s(:arguments , s(:string, "1") ))
       check
     end
 
     def test_call_main_op
       Register.machine.space.get_main.ensure_local(:bar , :Integer)
-      @input    = 'main( bar )'
+      @input    =  s(:call,  s(:name, :main),  s(:arguments , s(:name, :bar) ))
       check
     end
 
     def test_call_string_put
-      @input    = '"Hello Raisa, I am salama".putstring()'
+      @input    = s(:call,  s(:name, :putstring),  s(:arguments),  s(:receiver,    s(:string, "Hello Raisa, I am salama")))
       check
     end