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|
# frozen_string_literal: true
module GraphqlHelpers
MutationDefinition = Struct.new(:query, :variables)
NoData = Class.new(StandardError)
# makes an underscored string look like a fieldname
# "merge_request" => "mergeRequest"
def self.fieldnamerize(underscored_field_name)
underscored_field_name.to_s.camelize(:lower)
end
# Run a loader's named resolver in a way that closely mimics the framework.
#
# First the `ready?` method is called. If it turns out that the resolver is not
# ready, then the early return is returned instead.
#
# Then the resolve method is called.
def resolve(resolver_class, args: {}, **resolver_args)
resolver = resolver_instance(resolver_class, **resolver_args)
ready, early_return = sync_all { resolver.ready?(**args) }
return early_return unless ready
resolver.resolve(**args)
end
def resolver_instance(resolver_class, obj: nil, ctx: {}, field: nil, schema: GitlabSchema)
if ctx.is_a?(Hash)
q = double('Query', schema: schema)
ctx = GraphQL::Query::Context.new(query: q, object: obj, values: ctx)
end
resolver_class.new(object: obj, context: ctx, field: field)
end
# Eagerly run a loader's named resolver
# (syncs any lazy values returned by resolve)
def eager_resolve(resolver_class, **opts)
sync(resolve(resolver_class, **opts))
end
def sync(value)
if GitlabSchema.lazy?(value)
GitlabSchema.sync_lazy(value)
else
value
end
end
# Runs a block inside a BatchLoader::Executor wrapper
def batch(max_queries: nil, &blk)
wrapper = proc do
BatchLoader::Executor.ensure_current
yield
ensure
BatchLoader::Executor.clear_current
end
if max_queries
result = nil
expect { result = wrapper.call }.not_to exceed_query_limit(max_queries)
result
else
wrapper.call
end
end
# BatchLoader::GraphQL returns a wrapper, so we need to :sync in order
# to get the actual values
def batch_sync(max_queries: nil, &blk)
batch(max_queries: max_queries) { sync_all(&blk) }
end
def sync_all(&blk)
lazy_vals = yield
lazy_vals.is_a?(Array) ? lazy_vals.map { |val| sync(val) } : sync(lazy_vals)
end
def graphql_query_for(name, attributes = {}, fields = nil)
<<~QUERY
{
#{query_graphql_field(name, attributes, fields)}
}
QUERY
end
def graphql_mutation(name, input, fields = nil, &block)
raise ArgumentError, 'Please pass either `fields` parameter or a block to `#graphql_mutation`, but not both.' if fields.present? && block_given?
mutation_name = GraphqlHelpers.fieldnamerize(name)
input_variable_name = "$#{input_variable_name_for_mutation(name)}"
mutation_field = GitlabSchema.mutation.fields[mutation_name]
fields = yield if block_given?
fields ||= all_graphql_fields_for(mutation_field.type.to_graphql)
query = <<~MUTATION
mutation(#{input_variable_name}: #{mutation_field.arguments['input'].type.to_graphql}) {
#{mutation_name}(input: #{input_variable_name}) {
#{fields}
}
}
MUTATION
variables = variables_for_mutation(name, input)
MutationDefinition.new(query, variables)
end
def variables_for_mutation(name, input)
graphql_input = prepare_input_for_mutation(input)
result = { input_variable_name_for_mutation(name) => graphql_input }
# Avoid trying to serialize multipart data into JSON
if graphql_input.values.none? { |value| io_value?(value) }
result.to_json
else
result
end
end
def resolve_field(name, object, args = {})
context = double("Context",
schema: GitlabSchema,
query: GraphQL::Query.new(GitlabSchema),
parent: nil)
field = described_class.fields[::GraphqlHelpers.fieldnamerize(name)]
instance = described_class.authorized_new(object, context)
field.resolve_field(instance, {}, context)
end
# Recursively convert a Hash with Ruby-style keys to GraphQL fieldname-style keys
#
# prepare_input_for_mutation({ 'my_key' => 1 })
# => { 'myKey' => 1}
def prepare_input_for_mutation(input)
input.map do |name, value|
value = prepare_input_for_mutation(value) if value.is_a?(Hash)
[GraphqlHelpers.fieldnamerize(name), value]
end.to_h
end
def input_variable_name_for_mutation(mutation_name)
mutation_name = GraphqlHelpers.fieldnamerize(mutation_name)
mutation_field = GitlabSchema.mutation.fields[mutation_name]
input_type = field_type(mutation_field.arguments['input'])
GraphqlHelpers.fieldnamerize(input_type)
end
def field_with_params(name, attributes = {})
namerized = GraphqlHelpers.fieldnamerize(name.to_s)
return "#{namerized}" if attributes.blank?
field_params = if attributes.is_a?(Hash)
"(#{attributes_to_graphql(attributes)})"
else
"(#{attributes})"
end
"#{namerized}#{field_params}"
end
def query_graphql_field(name, attributes = {}, fields = nil)
<<~QUERY
#{field_with_params(name, attributes)}
#{wrap_fields(fields || all_graphql_fields_for(name.to_s.classify))}
QUERY
end
def wrap_fields(fields)
fields = Array.wrap(fields).map do |field|
case field
when Symbol
GraphqlHelpers.fieldnamerize(field)
else
field
end
end.join("\n")
return unless fields.present?
<<~FIELDS
{
#{fields}
}
FIELDS
end
def all_graphql_fields_for(class_name, parent_types = Set.new, max_depth: 3, excluded: [])
# pulling _all_ fields can generate a _huge_ query (like complexity 180,000),
# and significantly increase spec runtime. so limit the depth by default
return if max_depth <= 0
allow_unlimited_graphql_complexity
allow_unlimited_graphql_depth
allow_high_graphql_recursion
allow_high_graphql_transaction_threshold
type = GitlabSchema.types[class_name.to_s]
return "" unless type
type.fields.map do |name, field|
# We can't guess arguments, so skip fields that require them
next if required_arguments?(field)
next if excluded.include?(name)
singular_field_type = field_type(field)
# If field type is the same as parent type, then we're hitting into
# mutual dependency. Break it from infinite recursion
next if parent_types.include?(singular_field_type)
if nested_fields?(field)
fields =
all_graphql_fields_for(singular_field_type, parent_types | [type], max_depth: max_depth - 1)
"#{name} { #{fields} }" unless fields.blank?
else
name
end
end.compact.join("\n")
end
def attributes_to_graphql(attributes)
attributes.map do |name, value|
value_str = as_graphql_literal(value)
"#{GraphqlHelpers.fieldnamerize(name.to_s)}: #{value_str}"
end.join(", ")
end
# Fairly dumb Ruby => GraphQL rendering function. Only suitable for testing.
# Use symbol for Enum values
def as_graphql_literal(value)
case value
when Array then "[#{value.map { |v| as_graphql_literal(v) }.join(',')}]"
when Hash then "{#{attributes_to_graphql(value)}}"
when Integer, Float then value.to_s
when String then "\"#{value.gsub(/"/, '\\"')}\""
when Symbol then value
when nil then 'null'
when true then 'true'
when false then 'false'
else raise ArgumentError, "Cannot represent #{value} as GraphQL literal"
end
end
def post_multiplex(queries, current_user: nil, headers: {})
post api('/', current_user, version: 'graphql'), params: { _json: queries }, headers: headers
end
def post_graphql(query, current_user: nil, variables: nil, headers: {})
params = { query: query, variables: variables&.to_json }
post api('/', current_user, version: 'graphql'), params: params, headers: headers
end
def post_graphql_mutation(mutation, current_user: nil)
post_graphql(mutation.query, current_user: current_user, variables: mutation.variables)
end
def post_graphql_mutation_with_uploads(mutation, current_user: nil)
file_paths = file_paths_in_mutation(mutation)
params = mutation_to_apollo_uploads_param(mutation, files: file_paths)
workhorse_post_with_file(api('/', current_user, version: 'graphql'),
params: params,
file_key: '1'
)
end
def file_paths_in_mutation(mutation)
paths = []
find_uploads(paths, [], mutation.variables)
paths
end
# Depth first search for UploadedFile values
def find_uploads(paths, path, value)
case value
when Rack::Test::UploadedFile
paths << path
when Hash
value.each do |k, v|
find_uploads(paths, path + [k], v)
end
when Array
value.each_with_index do |v, i|
find_uploads(paths, path + [i], v)
end
end
end
# this implements GraphQL multipart request v2
# https://github.com/jaydenseric/graphql-multipart-request-spec/tree/v2.0.0-alpha.2
# this is simplified and do not support file deduplication
def mutation_to_apollo_uploads_param(mutation, files: [])
operations = { 'query' => mutation.query, 'variables' => mutation.variables }
map = {}
extracted_files = {}
files.each_with_index do |file_path, idx|
apollo_idx = (idx + 1).to_s
parent_dig_path = file_path[0..-2]
file_key = file_path[-1]
parent = operations['variables']
parent = parent.dig(*parent_dig_path) unless parent_dig_path.empty?
extracted_files[apollo_idx] = parent[file_key]
parent[file_key] = nil
map[apollo_idx] = ["variables.#{file_path.join('.')}"]
end
{ operations: operations.to_json, map: map.to_json }.merge(extracted_files)
end
# Raises an error if no data is found
def graphql_data
# Note that `json_response` is defined as `let(:json_response)` and
# therefore, in a spec with multiple queries, will only contain data
# from the _first_ query, not subsequent ones
json_response['data'] || (raise NoData, graphql_errors)
end
def graphql_data_at(*path)
graphql_dig_at(graphql_data, *path)
end
def graphql_dig_at(data, *path)
keys = path.map { |segment| segment.is_a?(Integer) ? segment : GraphqlHelpers.fieldnamerize(segment) }
# Allows for array indexing, like this
# ['project', 'boards', 'edges', 0, 'node', 'lists']
keys.reduce(data) do |memo, key|
memo.is_a?(Array) ? memo[key] : memo&.dig(key)
end
end
def graphql_errors
case json_response
when Hash # regular query
json_response['errors']
when Array # multiplexed queries
json_response.map { |response| response['errors'] }
else
raise "Unknown GraphQL response type #{json_response.class}"
end
end
def expect_graphql_errors_to_include(regexes_to_match)
raise "No errors. Was expecting to match #{regexes_to_match}" if graphql_errors.nil? || graphql_errors.empty?
error_messages = flattened_errors.collect { |error_hash| error_hash["message"] }
Array.wrap(regexes_to_match).flatten.each do |regex|
expect(error_messages).to include a_string_matching regex
end
end
def expect_graphql_errors_to_be_empty
expect(flattened_errors).to be_empty
end
def flattened_errors
Array.wrap(graphql_errors).flatten.compact
end
# Raises an error if no response is found
def graphql_mutation_response(mutation_name)
graphql_data.fetch(GraphqlHelpers.fieldnamerize(mutation_name))
end
def scalar_fields_of(type_name)
GitlabSchema.types[type_name].fields.map do |name, field|
next if nested_fields?(field) || required_arguments?(field)
name
end.compact
end
def nested_fields_of(type_name)
GitlabSchema.types[type_name].fields.map do |name, field|
next if !nested_fields?(field) || required_arguments?(field)
[name, field]
end.compact
end
def nested_fields?(field)
!scalar?(field) && !enum?(field)
end
def scalar?(field)
field_type(field).kind.scalar?
end
def enum?(field)
field_type(field).kind.enum?
end
def required_arguments?(field)
field.arguments.values.any? { |argument| argument.type.non_null? }
end
def io_value?(value)
Array.wrap(value).any? { |v| v.respond_to?(:to_io) }
end
def field_type(field)
field_type = field.type.respond_to?(:to_graphql) ? field.type.to_graphql : field.type
# The type could be nested. For example `[GraphQL::STRING_TYPE]`:
# - List
# - String!
# - String
field_type = field_type.of_type while field_type.respond_to?(:of_type)
field_type
end
# for most tests, we want to allow unlimited complexity
def allow_unlimited_graphql_complexity
allow_any_instance_of(GitlabSchema).to receive(:max_complexity).and_return nil
allow(GitlabSchema).to receive(:max_query_complexity).with(any_args).and_return nil
end
def allow_unlimited_graphql_depth
allow_any_instance_of(GitlabSchema).to receive(:max_depth).and_return nil
allow(GitlabSchema).to receive(:max_query_depth).with(any_args).and_return nil
end
def allow_high_graphql_recursion
allow_any_instance_of(Gitlab::Graphql::QueryAnalyzers::RecursionAnalyzer).to receive(:recursion_threshold).and_return 1000
end
def allow_high_graphql_transaction_threshold
stub_const("Gitlab::QueryLimiting::Transaction::THRESHOLD", 1000)
end
def node_array(data, extract_attribute = nil)
data.map do |item|
extract_attribute ? item['node'][extract_attribute] : item['node']
end
end
def global_id_of(model)
model.to_global_id.to_s
end
def missing_required_argument(path, argument)
a_hash_including(
'path' => ['query'].concat(path),
'extensions' => a_hash_including('code' => 'missingRequiredArguments', 'arguments' => argument.to_s)
)
end
def custom_graphql_error(path, msg)
a_hash_including('path' => path, 'message' => msg)
end
def type_factory
Class.new(Types::BaseObject) do
graphql_name 'TestType'
field :name, GraphQL::STRING_TYPE, null: true
yield(self) if block_given?
end
end
def query_factory
Class.new(Types::BaseObject) do
graphql_name 'TestQuery'
yield(self) if block_given?
end
end
def execute_query(query_type)
schema = Class.new(GraphQL::Schema) do
use GraphQL::Pagination::Connections
use Gitlab::Graphql::Authorize
use Gitlab::Graphql::Pagination::Connections
lazy_resolve ::Gitlab::Graphql::Lazy, :force
query(query_type)
end
schema.execute(
query_string,
context: { current_user: user },
variables: {}
)
end
end
# This warms our schema, doing this as part of loading the helpers to avoid
# duplicate loading error when Rails tries autoload the types.
GitlabSchema.graphql_definition
|