[gql_build] regression for interfaces

[gql-dart]

[gql_build] regression for interfaces

[smkhalsa]

Here's the error that's thrown:

NoSuchMethodError: The method '+' was called on null.
Receiver: null
Tried calling: +("#data")
[SEVERE] gql_build:data_builder on lib/services/graphql/audio_history_query.graphql (cached):

[smkhalsa]

We should probably add some unit tests to avoid these types of regressions in the future. When I first started researching dart builders, I looked a bit at build_test, but I haven't dug deep into it yet.

If you have any sample tests for the builders, it'd be helpful to review them.

[klavs]

Please add --verbose flag to see the line failing.

[smkhalsa]

Here's the verbose output:

[SEVERE] gql_build:data_builder on lib/services/graphql/audio_history_query.graphql (cached):

NoSuchMethodError: The method '+' was called on null.
Receiver: null
Tried calling: +("#data")
dart:core                                                               Object.noSuchMethod
package:gql_code_builder/src/operation/data.dart 143:51                 _buildSelectionSetDataClasses.<fn>.<fn>
dart:core                                                               new List.from
package:built_collection/src/list/list_builder.dart 52:19               ListBuilder.replace
package:built_collection/src/list/list_builder.dart 28:45               new ListBuilder
package:gql_code_builder/src/operation/data.dart 139:24                 _buildSelectionSetDataClasses.<fn>
package:code_builder/src/specs/class.g.dart 304:33                      _$ClassBuilder.update
package:code_builder/src/specs/class.g.dart 44:28                       new _$Class
package:gql_code_builder/src/operation/data.dart 136:5                  _buildSelectionSetDataClasses
package:gql_code_builder/src/operation/data.dart 186:31                 _buildSelectionSetDataClasses.<fn>
dart:_internal                                                          ExpandIterator.moveNext
package:gql_code_builder/src/operation/data.dart 185:51                 _buildSelectionSetDataClasses
package:gql_code_builder/src/operation/data.dart 165:22                 _buildSelectionSetDataClasses.<fn>
dart:_internal                                                          ExpandIterator.moveNext
package:gql_code_builder/src/operation/data.dart 164:10                 _buildSelectionSetDataClasses
package:gql_code_builder/src/operation/data.dart 165:22                 _buildSelectionSetDataClasses.<fn>
dart:_internal                                                          ExpandIterator.moveNext
package:gql_code_builder/src/operation/data.dart 164:10                 _buildSelectionSetDataClasses
package:gql_code_builder/src/operation/data.dart 51:10                  _buildOperationDataClasses
package:gql_code_builder/src/operation/data.dart 26:21                  buildDataClasses.<fn>
dart:core                                                               Iterable.toList
package:gql_code_builder/src/operation/data.dart 32:12                  buildDataClasses
package:gql_code_builder/data.dart 12:11                                buildDataLibrary.<fn>
package:code_builder/src/specs/library.g.dart 108:33                    _$LibraryBuilder.update
package:code_builder/src/specs/library.g.dart 26:30                     new _$Library
package:gql_code_builder/data.dart 9:5                                  buildDataLibrary
package:gql_build/src/data_builder.dart 27:21                           DataBuilder.build
package:build                                                           runBuilder
package:build_runner_core/src/generate/build_impl.dart 486:19           _SingleBuild._runForInput.<fn>.<fn>.<fn>
package:build_runner_core/src/generate/performance_tracker.dart 302:15  _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 484:23           _SingleBuild._runForInput.<fn>.<fn>
package:timing/src/timing.dart 222:44                                   NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 441:22           _SingleBuild._runForInput.<fn>
package:pool/pool.dart 127:28                                           Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 437:17           _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 375:38           _SingleBuild._runBuilder.<fn>
dart:async                                                              Future.wait
package:build_runner_core/src/generate/build_impl.dart 374:36           _SingleBuild._runBuilder
dart:async                                                              _AsyncAwaitCompleter.start
package:build_runner_core/src/generate/build_impl.dart 372:40           _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 320:20           _SingleBuild._runPhases.<fn>.<fn>
dart:async                                                              _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart                  _SingleBuild._matchingPrimaryInputs

[klavs]

Fixing...