| // 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 ( |
| "testing" |
| |
| "github.com/apache/beam/sdks/go/pkg/beam" |
| "github.com/apache/beam/sdks/go/pkg/beam/testing/passert" |
| "github.com/apache/beam/sdks/go/pkg/beam/testing/ptest" |
| ) |
| |
| func init() { |
| beam.RegisterFunction(identity) |
| beam.RegisterFunction(identityMinus2) |
| beam.RegisterFunction(mod2) |
| beam.RegisterFunction(less3) |
| beam.RegisterFunction(extractKV) |
| beam.RegisterFunction(combineKV) |
| beam.RegisterFunction(mod2Keys) |
| } |
| |
| func identity(n int) int { return n } |
| |
| func identityMinus2(n int) int { return n - 2 } |
| |
| func mod2(n int) int { return n % 2 } |
| |
| func less3(n int) int { |
| if n < 3 { |
| return 0 |
| } |
| return 1 |
| } |
| |
| func TestPartition(t *testing.T) { |
| tests := []struct { |
| in []int |
| n int |
| fn interface{} |
| out0 []int |
| }{ |
| { |
| []int{1, 2, 3, 4, 5, 6}, |
| 2, |
| mod2, |
| []int{2, 4, 6}, |
| }, |
| { |
| []int{1, 2, 3, 4, 5, 6, 7}, |
| 11, |
| mod2, |
| []int{2, 4, 6}, |
| }, |
| { |
| []int{1, 2, 3, 4, 5, 6, 7, 8}, |
| 2, |
| less3, |
| []int{1, 2}, |
| }, |
| { |
| []int{2, 3, 4, 5}, |
| 4, |
| identityMinus2, |
| []int{2}, |
| }, |
| } |
| |
| for _, test := range tests { |
| p, s, in, exp := ptest.CreateList2(test.in, test.out0) |
| out := beam.Partition(s, test.n, test.fn, in) |
| passert.Equals(s, out[0], exp) |
| |
| if err := ptest.Run(p); err != nil { |
| t.Errorf("Partition(%v)[0] != %v: %v", test.in, test.out0, err) |
| } |
| } |
| } |
| |
| type kvIntInt struct { |
| K, V int |
| } |
| |
| func extractKV(v kvIntInt) (int, int) { |
| return v.K, v.V |
| } |
| |
| func combineKV(k, v int) kvIntInt { |
| return kvIntInt{k, v} |
| } |
| |
| func mod2Keys(k, v int) int { |
| return mod2(k) |
| } |
| |
| func TestPartitionKV(t *testing.T) { |
| tests := []struct { |
| in []kvIntInt |
| n int |
| fn interface{} |
| out0 []kvIntInt |
| }{ |
| { |
| []kvIntInt{{1, 1}, {1, 2}, {2, 3}, {3, 4}}, |
| 2, |
| mod2Keys, |
| []kvIntInt{{2, 3}}, |
| }, |
| { |
| []kvIntInt{{1, 1}, {1, 2}, {2, 3}, {3, 4}}, |
| 11, |
| mod2Keys, |
| []kvIntInt{{2, 3}}, |
| }, |
| } |
| |
| for _, test := range tests { |
| p, s, in, exp := ptest.CreateList2(test.in, test.out0) |
| kvs := beam.ParDo(s, extractKV, in) |
| parts := beam.Partition(s, test.n, test.fn, kvs) |
| out := beam.ParDo(s, combineKV, parts[0]) |
| passert.Equals(s, out, exp) |
| |
| if err := ptest.Run(p); err != nil { |
| t.Errorf("Partition(%v)[0] != %v: %v", test.in, test.out0, err) |
| } |
| } |
| } |
| |
| func TestPartitionFailures(t *testing.T) { |
| tests := []struct { |
| in []int |
| n int |
| fn interface{} |
| }{ |
| { |
| []int{1, 2}, |
| 1, // too small: 1 -> index 1 |
| mod2, |
| }, |
| { |
| []int{1, 2, 3, 4, 5, 6}, |
| 6, // too small: 6 -> index 6 |
| identity, |
| }, |
| { |
| []int{1, 2, 3, 4}, |
| 5, |
| identityMinus2, // bad fn: 1 => index -1 |
| }, |
| } |
| |
| for _, test := range tests { |
| p, s, in := ptest.CreateList(test.in) |
| beam.Partition(s, test.n, test.fn, in) |
| |
| if err := ptest.Run(p); err == nil { |
| t.Errorf("Partition(%v) succeeded, want error", in) |
| } |
| } |
| } |
| |
| func TestPartitionFlattenIdentity(t *testing.T) { |
| tests := []struct { |
| in []int |
| n int |
| fn interface{} |
| }{ |
| { |
| []int{1, 2, 3, 4}, |
| 2, |
| mod2, |
| }, |
| { |
| []int{1, 2, 3, 4, 5}, |
| 2, |
| less3, |
| }, |
| { |
| []int{1, 2, 3, 4, 5, 6}, |
| 7, |
| identity, |
| }, |
| } |
| |
| for _, test := range tests { |
| p, s, in := ptest.CreateList(test.in) |
| out := beam.Partition(s, test.n, test.fn, in) |
| passert.Equals(s, beam.Flatten(s, out...), in) |
| |
| if err := ptest.Run(p); err != nil { |
| t.Errorf("Flatten(Partition(%v)) != %v: %v", test.in, test.in, err) |
| } |
| } |
| } |