expect_that(boatIsOfTypeArvadosFile, is_true())
expect_that(boatsParentIsRoot, is_true())
expect_that(allElementsBelongToSameCollection, is_true())
expect_that(boatIsOfTypeArvadosFile, is_true())
expect_that(boatsParentIsRoot, is_true())
expect_that(allElementsBelongToSameCollection, is_true())