ceph/src/arrow/go/parquet/schema/helpers_test.go

   1 // Licensed to the Apache Software Foundation (ASF) under one
   2 // or more contributor license agreements.  See the NOTICE file
   3 // distributed with this work for additional information
   4 // regarding copyright ownership.  The ASF licenses this file
   5 // to you under the Apache License, Version 2.0 (the
   6 // "License"); you may not use this file except in compliance
   7 // with the License.  You may obtain a copy of the License at
   8 //
   9 // http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16
  17 package schema_test
  18
  19 import (
  20         "bytes"
  21         "strings"
  22         "testing"
  23
  24         "github.com/apache/arrow/go/v6/parquet"
  25         "github.com/apache/arrow/go/v6/parquet/schema"
  26         "github.com/stretchr/testify/assert"
  27 )
  28
  29 func TestListOf(t *testing.T) {
  30         n := schema.NewByteArrayNode("str", parquet.Repetitions.Required, 1)
  31         list, err := schema.ListOf(n, parquet.Repetitions.Optional, 2)
  32
  33         assert.NoError(t, err)
  34         assert.Equal(t, "str", list.Name())
  35         assert.Equal(t, parquet.Repetitions.Optional, list.RepetitionType())
  36         assert.Equal(t, 1, list.NumFields())
  37         assert.EqualValues(t, 2, list.FieldID())
  38         assert.IsType(t, &schema.GroupNode{}, list.Field(0))
  39         assert.Equal(t, "list", list.Field(0).Name())
  40         assert.Equal(t, 1, list.Field(0).(*schema.GroupNode).NumFields())
  41         assert.Same(t, n, list.Field(0).(*schema.GroupNode).Field(0))
  42         assert.Equal(t, "element", list.Field(0).(*schema.GroupNode).Field(0).Name())
  43 }
  44
  45 func TestListOfNested(t *testing.T) {
  46         n, err := schema.ListOf(schema.NewInt32Node("arrays", parquet.Repetitions.Required, -1), parquet.Repetitions.Required, -1)
  47         assert.NoError(t, err)
  48         final, err := schema.ListOf(n, parquet.Repetitions.Required, -1)
  49         assert.NoError(t, err)
  50
  51         var buf bytes.Buffer
  52         schema.PrintSchema(final, &buf, 4)
  53         assert.Equal(t,
  54                 `required group field_id=-1 arrays (List) {
  55     repeated group field_id=-1 list {
  56         required group field_id=-1 element (List) {
  57             repeated group field_id=-1 list {
  58                 required int32 field_id=-1 element;
  59             }
  60         }
  61     }
  62 }`, strings.TrimSpace(buf.String()))
  63 }
  64
  65 func TestMapOfNestedTypes(t *testing.T) {
  66         n, err := schema.NewGroupNode("student", parquet.Repetitions.Required, schema.FieldList{
  67                 schema.NewByteArrayNode("name", parquet.Repetitions.Required, -1),
  68                 schema.NewInt32Node("age", parquet.Repetitions.Optional, -1),
  69         }, -1)
  70         assert.NoError(t, err)
  71
  72         grp, err := schema.NewGroupNode("classes", parquet.Repetitions.Optional, schema.FieldList{
  73                 schema.NewInt32Node("a", parquet.Repetitions.Repeated, -1),
  74                 schema.NewFloat32Node("b", parquet.Repetitions.Repeated, -1),
  75         }, -1)
  76         assert.NoError(t, err)
  77
  78         classes, err := schema.ListOf(grp, parquet.Repetitions.Optional, -1)
  79         assert.NoError(t, err)
  80
  81         m, err := schema.MapOf("studentmap", n, classes, parquet.Repetitions.Required, 1)
  82         assert.NoError(t, err)
  83
  84         var buf bytes.Buffer
  85         schema.PrintSchema(m, &buf, 4)
  86         assert.Equal(t,
  87                 `required group field_id=1 studentmap (Map) {
  88     repeated group field_id=-1 key_value {
  89         required group field_id=-1 key {
  90             required byte_array field_id=-1 name;
  91             optional int32 field_id=-1 age;
  92         }
  93         optional group field_id=-1 value (List) {
  94             repeated group field_id=-1 list {
  95                 optional group field_id=-1 element {
  96                     repeated int32 field_id=-1 a;
  97                     repeated float field_id=-1 b;
  98                 }
  99             }
 100         }
 101     }
 102 }`, strings.TrimSpace(buf.String()))
 103 }