change test framework to use files for in and out (s-exp)

test/cases/call_site/call_puts_two.tst

@@ -0,0 +1,7 @@
+puts(3  , a )
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "puts"), 
+  s(:arguments, 
+    s(:int,  3), 
+    s(:name,  "a")))])

test/cases/call_site/call_site_multi.tst

@@ -0,0 +1,7 @@
+baz(42, foo)
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "baz"), 
+  s(:arguments, 
+    s(:int,  42), 
+    s(:name,  "foo")))])

test/cases/call_site/call_site_string.tst

@@ -0,0 +1,6 @@
+puts( "hello")
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "puts"), 
+  s(:arguments, 
+    s(:string,  "hello")))])

test/cases/call_site/int_receiver.tst

@@ -0,0 +1,7 @@
+42.put()
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "put"), 
+  s(:arguments), 
+  s(:receiver, 
+    s(:int,  42)))])

test/cases/call_site/puts_call.tst

@@ -0,0 +1,6 @@
+puts( 5)
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "puts"), 
+  s(:arguments, 
+    s(:int,  5)))])

test/cases/call_site/single_argument.tst

@@ -0,0 +1,6 @@
+foo(42)
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "foo"), 
+  s(:arguments, 
+    s(:int,  42)))])

test/cases/call_site/single_class.tst

@@ -0,0 +1,8 @@
+Object.foo(42)
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "foo"), 
+  s(:arguments, 
+    s(:int,  42)), 
+  s(:receiver, 
+    s(:module,  "Object")))])

test/cases/call_site/single_name.tst

@@ -0,0 +1,8 @@
+my_my.foo(42)
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "foo"), 
+  s(:arguments, 
+    s(:int,  42)), 
+  s(:receiver, 
+    s(:name,  "my_my")))])

test/cases/call_site/single_self.tst

@@ -0,0 +1,8 @@
+self.foo(42)
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "foo"), 
+  s(:arguments, 
+    s(:int,  42)), 
+  s(:receiver, 
+    s(:name,  "self")))])

test/cases/call_site/string_receiver.tst

@@ -0,0 +1,7 @@
+"hello".puts()
+-- -- --
+s(:list,  [s(:call, 
+  s(:name,  "puts"), 
+  s(:arguments), 
+  s(:receiver, 
+    s(:string,  "hello")))])