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# frozen_string_literal: true
require "spec_helper"
describe GraphQL::Schema::Directive::OneOf do
let(:schema) do
this = self
output_type = Class.new(GraphQL::Schema::Object) do
graphql_name "OneOfOutput"
field :string, GraphQL::Types::String
field :int, GraphQL::Types::Int
end
query_type = Class.new(GraphQL::Schema::Object) do
graphql_name "Query"
field :one_of_field, output_type, null: false do
argument :one_of_arg, this.one_of_input_object
end.ensure_loaded
def one_of_field(one_of_arg:)
one_of_arg
end
end
Class.new(GraphQL::Schema) do
query(query_type)
end
end
let(:one_of_input_object) do
Class.new(GraphQL::Schema::InputObject) do
graphql_name "OneOfInputObject"
directive GraphQL::Schema::Directive::OneOf
argument :int, GraphQL::Types::Int, required: false
argument :string, GraphQL::Types::String, required: false
end
end
describe "defining oneOf input objects" do
describe "with a non-null argument" do
let(:one_of_input_object) do
Class.new(GraphQL::Schema::InputObject) do
graphql_name "OneOfInputObject"
directive GraphQL::Schema::Directive::OneOf
argument :int, GraphQL::Types::Int, required: true # rubocop:disable GraphQL/DefaultRequiredTrue
argument :string, GraphQL::Types::String
end
end
it "raises an error" do
error = assert_raises(ArgumentError) { schema }
expected_message = "Argument 'OneOfInputObject.int' must be nullable because it is part of a OneOf type, add `required: false`."
assert_equal(expected_message, error.message)
end
end
describe "when an argument has a default" do
let(:one_of_input_object) do
Class.new(GraphQL::Schema::InputObject) do
graphql_name "OneOfInputObject"
directive GraphQL::Schema::Directive::OneOf
argument :int, GraphQL::Types::Int, default_value: 1, required: false
argument :string, GraphQL::Types::String, required: false
end
end
it "raises an error" do
error = assert_raises(ArgumentError) { schema }
expected_message = "Argument 'OneOfInputObject.int' cannot have a default value because it is part of a OneOf type, remove `default_value: ...`."
assert_equal(expected_message, error.message)
end
end
end
describe "execution" do
let(:query) do
<<~GRAPHQL
query TestQuery($oneOfInputObject: OneOfInputObject!) {
oneOfField(oneOfArg: $oneOfInputObject) {
string
int
}
}
GRAPHQL
end
it "accepts a default value with exactly one non-null key" do
query = <<~GRAPHQL
query TestQuery($oneOfInputObject: OneOfInputObject = { string: "default" }) {
oneOfField(oneOfArg: $oneOfInputObject) {
string
int
}
}
GRAPHQL
result = schema.execute(query)
assert_equal({ "string" => "default", "int" => nil }, result["data"]["oneOfField"])
end
it "rejects a default value with multiple non-null keys" do
query = <<~GRAPHQL
query TestQuery($oneOfInputObject: OneOfInputObject = { string: "default", int: 2 }) {
oneOfField(oneOfArg: $oneOfInputObject) {
string
int
}
}
GRAPHQL
result = schema.execute(query)
expected_errors = ["`OneOfInputObject` is a OneOf type, so only one argument may be given (instead of 2)"]
assert_equal(expected_errors, result["errors"].map { |e| e["message"] })
end
it "rejects a default value with multiple nullable keys" do
query = <<~GRAPHQL
query TestQuery($oneOfInputObject: OneOfInputObject = { string: "default", int: null }) {
oneOfField(oneOfArg: $oneOfInputObject) {
string
int
}
}
GRAPHQL
result = schema.execute(query)
expected_errors = ["`OneOfInputObject` is a OneOf type, so only one argument may be given (instead of 2)"]
assert_equal(expected_errors, result["errors"].map { |e| e["message"] })
end
it "accepts a variable with exactly one non-null key" do
string_result = schema.execute(query, variables: { oneOfInputObject: { string: "abc" } })
int_result = schema.execute(query, variables: { oneOfInputObject: { int: 2 } })
assert_equal({ "string" => "abc", "int" => nil }, string_result["data"]["oneOfField"])
assert_equal({ "string" => nil, "int" => 2 }, int_result["data"]["oneOfField"])
end
it "rejects a variable with exactly one null key" do
result = schema.execute(query, variables: { oneOfInputObject: { string: nil } })
expected_errors = ["'OneOfInputObject' requires exactly one argument, but 'string' was `null`."]
assert_equal(expected_errors, result["errors"].map { |e| e["extensions"]["problems"].map { |pr| pr["explanation"] } }.flatten)
end
it "rejects a variable with multiple non-null keys" do
result = schema.execute(query, variables: { oneOfInputObject: { string: "abc", int: 2 } })
expected_errors = ["'OneOfInputObject' requires exactly one argument, but 2 were provided."]
assert_equal(expected_errors, result["errors"].map { |e| e["extensions"]["problems"].map { |pr| pr["explanation"] } }.flatten)
end
end
end
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