Add tests

examples/temp.pf

@@ -1,27 +0,0 @@
-newtype 
-
-Foo = struct(flerp int, glerp Spoitable)
-
-Bar = struct(blerp int)
-
-Zort = abstract Bar/Foo
-
-Spoitable = interface :
-    spoit(x self)
-
-def
-
-qux(z Zort) :
-    z
-
-troz(a Addable) :
-    a
-
-spoit(b Bar) :
-    b
-
-respoit(s Spoitable) :
-    s 
-
-goo(g intlike) :
-    g 

source/compiler/test-files/interface_test.pf

@@ -8,6 +8,15 @@ Qux = enum ZORT, TROZ, BLERP, SPONG
 
 Fnug = clone int using +, -
 
+Grunt = struct(flerp int, glerp Spoitable)
+
+Derp = struct(blerp int)
+
+Zort = abstract Derp/Grunt
+
+Spoitable = interface :
+    spoit(x self)
+
 def
 
 foo(q Qux) -> int :
@@ -19,4 +28,14 @@ bar(q Qux) -> int :
 (p Qux) + (q Qux) -> Qux :
     Qux[(int(p) + int(q)) mod 4]
 
+xuq(z Zort) :
+    z
+
+troz(a Addable) :
+    a
+
+spoit(b Derp) :
+    b
 
+respoit(s Spoitable) :
+    s 

source/vm/vm_test.go

@@ -390,6 +390,11 @@ func TestInterface(t *testing.T) {
 		{`ZORT in Foobarable`, `true`},
 		{`true in Addable`, `false`},
 		{`Fnug(5) in Foobarable`, `false`},
+		{`Grunt(1, Derp(5))`, `Grunt with (flerp::1, glerp::Derp with (blerp::5))`},
+		{`Derp(5) in Zort`, `true`},
+		{`Derp(5) in Spoitable`, `true`},
+		{`xuq Derp(5)`, `Derp with (blerp::5)`},
+		{`respoit Derp(5)`, `Derp with (blerp::5)`},
 	}
 	test_helper.RunTest(t, "interface_test.pf", tests, test_helper.TestValues)
 }