Added test case for basic type casting trait

Author: IsaacShelton

Diff for: tests/run.py

@@ -30,7 +30,7 @@ def prepare(executable, dir, entry):
     folder = join(dir, entry.name)
     is_mod = exists(join(folder, "_.adept"))
 
-    cmd = [executable]
+    cmd = [executable, "--infrastructure", "infrastructure"]
 
     if is_mod:
         cmd.append(folder)

Diff for: tests/success/cast_trait/main.adept

@@ -0,0 +1,31 @@
+
+pragma => {
+    adept("3.0")
+    use("std", import("std"))
+    importNamespace("std")
+}
+
+#[foreign]
+func printf(format ptr<char>, ...) int
+
+func main {
+    castTest(1234)::(myCastIntToDouble, myCastIntToLongLong)
+}
+
+#[using std/Cast<int, double>]
+#[using std/Cast<int, longlong>]
+func castTest(x int) {
+    printf(c"%d %f %lld\n", x, x.cast<double>(), x.cast<longlong>())
+}
+
+impl std/Cast<int, double> myCastIntToDouble {
+    func cast(from int) double {
+        return from.double()
+    }
+}
+
+impl std/Cast<int, longlong> myCastIntToLongLong {
+    func cast(from int) longlong {
+        return from.longlong()
+    }
+}