| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package beam_test |
| |
| import ( |
| "reflect" |
| "testing" |
| |
| "github.com/apache/beam/sdks/go/pkg/beam" |
| ) |
| |
| // foolFn is a no-op CombineFn. |
| type foolFn struct { |
| OutputType beam.EncodedType |
| } |
| |
| type foolAccum struct{} |
| |
| func (f *foolFn) CreateAccumulator() *foolAccum { |
| return &foolAccum{} |
| } |
| |
| func (f *foolFn) AddInput(a *foolAccum, v beam.U) *foolAccum { |
| return a |
| } |
| |
| func (f *foolFn) MergeAccumulators(a *foolAccum, b *foolAccum) *foolAccum { |
| return a |
| } |
| |
| func (f *foolFn) ExtractOutput(a *foolAccum) beam.V { |
| return reflect.New(f.OutputType.T).Elem().Interface() |
| } |
| |
| func TestCombineWithTypeDefinition(t *testing.T) { |
| _, s := beam.NewPipelineWithRoot() |
| in := beam.Create(s, 1, 2, 3) |
| strType := reflect.TypeOf("") |
| combineFn := &foolFn{OutputType: beam.EncodedType{T: strType}} |
| output := beam.Combine(s, combineFn, in, beam.TypeDefinition{Var: beam.VType, T: strType}) |
| if output.Type().Type() != strType { |
| t.Errorf("expect combine output type to be %v, got %v", strType, output.Type().Type()) |
| } |
| } |