Update test to avoid duplicates

Author: owen-mc

go/ql/test/library-tests/semmle/go/aliases/InterfaceImpls/test.expected

@@ -13,16 +13,16 @@ callTargets
 | test.go:57:2:57:29 | call to ImplementMe | test.go:46:1:46:87 | function declaration | ImplementMe |
 | test.go:57:2:57:29 | call to ImplementMe | test.go:53:1:53:85 | function declaration | ImplementMe |
 #select
-| file://:0:0:0:0 | basic interface type | * Impl1 |
-| file://:0:0:0:0 | basic interface type | * Impl2 |
-| file://:0:0:0:0 | basic interface type | * Impl3 |
-| file://:0:0:0:0 | basic interface type | * Impl4 |
-| file://:0:0:0:0 | basic interface type | * Impl5 |
-| file://:0:0:0:0 | basic interface type | * Impl6 |
-| file://:0:0:0:0 | basic interface type | Impl1 |
-| file://:0:0:0:0 | basic interface type | Impl2 |
-| file://:0:0:0:0 | basic interface type | Impl3 |
-| file://:0:0:0:0 | basic interface type | Impl4 |
-| file://:0:0:0:0 | basic interface type | Impl5 |
-| file://:0:0:0:0 | basic interface type | Impl6 |
-| file://:0:0:0:0 | basic interface type | interface { ImplementMe func(func(struct { x int }) )  } |
+| interface { ImplementMe func(func(struct { x int }) )  } | * Impl1 |
+| interface { ImplementMe func(func(struct { x int }) )  } | * Impl2 |
+| interface { ImplementMe func(func(struct { x int }) )  } | * Impl3 |
+| interface { ImplementMe func(func(struct { x int }) )  } | * Impl4 |
+| interface { ImplementMe func(func(struct { x int }) )  } | * Impl5 |
+| interface { ImplementMe func(func(struct { x int }) )  } | * Impl6 |
+| interface { ImplementMe func(func(struct { x int }) )  } | Impl1 |
+| interface { ImplementMe func(func(struct { x int }) )  } | Impl2 |
+| interface { ImplementMe func(func(struct { x int }) )  } | Impl3 |
+| interface { ImplementMe func(func(struct { x int }) )  } | Impl4 |
+| interface { ImplementMe func(func(struct { x int }) )  } | Impl5 |
+| interface { ImplementMe func(func(struct { x int }) )  } | Impl6 |
+| interface { ImplementMe func(func(struct { x int }) )  } | interface { ImplementMe func(func(struct { x int }) )  } |

go/ql/test/library-tests/semmle/go/aliases/InterfaceImpls/test.ql

@@ -7,5 +7,9 @@ query predicate callTargets(DataFlow::CallNode cn, FuncDef target, string target
 from InterfaceType i, Type impl
 where
   i.hasMethod("ImplementMe", _) and
-  impl.implements(i)
-select i, impl.pp()
+  impl.implements(i) and
+  // Avoid duplicates caused by different types which are the same
+  // when you ignore aliases.
+  impl = impl.getDeepUnaliasedType() and
+  i = i.getDeepUnaliasedType()
+select i.pp(), impl.pp()