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Contents
# frozen_string_literal: true
require "spec_helper"
describe GraphQL::NonNullType do
describe "when a non-null field returns null" do
it "nulls out the parent selection" do
query_string = %|{ cow { name cantBeNullButIs } }|
result = Dummy::Schema.execute(query_string)
assert_equal({"cow" => nil }, result["data"])
assert_equal([{"message"=>"Cannot return null for non-nullable field Cow.cantBeNullButIs"}], result["errors"])
end
it "propagates the null up to the next nullable field" do
query_string = %|
{
nn1: deepNonNull {
nni1: nonNullInt(returning: 1)
nn2: deepNonNull {
nni2: nonNullInt(returning: 2)
nn3: deepNonNull {
nni3: nonNullInt
}
}
}
}
|
result = Dummy::Schema.execute(query_string)
assert_equal(nil, result["data"])
assert_equal([{"message"=>"Cannot return null for non-nullable field DeepNonNull.nonNullInt"}], result["errors"])
end
describe "when type_error is configured to raise an error" do
it "crashes query execution" do
raise_schema = Dummy::Schema.redefine {
type_error ->(type_err, ctx) {
raise type_err
}
}
query_string = %|{ cow { name cantBeNullButIs } }|
err = assert_raises(GraphQL::InvalidNullError) { raise_schema.execute(query_string) }
assert_equal("Cannot return null for non-nullable field Cow.cantBeNullButIs", err.message)
assert_equal("Cow", err.parent_type.graphql_name)
assert_equal("cantBeNullButIs", err.field.name)
assert_equal(nil, err.value)
end
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems