expect:
        def replaced = collection.replace(Stub(FileCollectionInternal), {})
        replaced.is(collection)
    }

    def "can replace one of the elements of a mutable collection"() {
        def collection1 = Mock(FileCollectionInternal)
        def collection2 = Mock(FileCollectionInternal)
        def replaced1 = Stub(FileCollectionInternal)
        def supplier = Stub(Supplier)

        return fileCollectionInternal("fileCollection(Dependency...)", deps::contains);
    }

    @Override
    @Deprecated
    public FileCollection fileCollection(Spec<? super Dependency> dependencySpec) {
        return fileCollectionInternal("fileCollection(Spec)", dependencySpec);
    }

    private FileCollection fileCollectionInternal(String methodName, Spec<? super Dependency> dependencySpec) {