zeroshade commented on code in PR #43679: URL: https://github.com/apache/arrow/pull/43679#discussion_r1727532042
########## go/arrow/extensions/json_test.go: ########## @@ -0,0 +1,259 @@ +// 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 extensions_test + +import ( + "bytes" + "strings" + "testing" + + "github.com/apache/arrow/go/v18/arrow" + "github.com/apache/arrow/go/v18/arrow/array" + "github.com/apache/arrow/go/v18/arrow/extensions" + "github.com/apache/arrow/go/v18/arrow/ipc" + "github.com/apache/arrow/go/v18/arrow/memory" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" +) + +func TestJSONTypeBasics(t *testing.T) { + typ, err := extensions.NewJSONType(arrow.BinaryTypes.String) + require.NoError(t, err) + + typLarge, err := extensions.NewJSONType(arrow.BinaryTypes.LargeString) + require.NoError(t, err) + + typView, err := extensions.NewJSONType(arrow.BinaryTypes.StringView) + require.NoError(t, err) + + assert.Equal(t, "arrow.json", typ.ExtensionName()) + assert.Equal(t, "arrow.json", typLarge.ExtensionName()) + assert.Equal(t, "arrow.json", typView.ExtensionName()) + + assert.True(t, typ.ExtensionEquals(typ)) + assert.True(t, typLarge.ExtensionEquals(typLarge)) + assert.True(t, typView.ExtensionEquals(typView)) + + assert.False(t, arrow.TypeEqual(arrow.BinaryTypes.String, typ)) + assert.False(t, arrow.TypeEqual(typ, typLarge)) + assert.False(t, arrow.TypeEqual(typ, typView)) + assert.False(t, arrow.TypeEqual(typLarge, typView)) + + assert.True(t, arrow.TypeEqual(arrow.BinaryTypes.String, typ.StorageType())) + assert.True(t, arrow.TypeEqual(arrow.BinaryTypes.LargeString, typLarge.StorageType())) + assert.True(t, arrow.TypeEqual(arrow.BinaryTypes.StringView, typView.StorageType())) + + assert.Equal(t, "extension<arrow.json[storage_type=utf8]>", typ.String()) + assert.Equal(t, "extension<arrow.json[storage_type=large_utf8]>", typLarge.String()) + assert.Equal(t, "extension<arrow.json[storage_type=string_view]>", typView.String()) +} + +var jsonTestCases = []struct { + Name string + StorageType arrow.DataType + StorageBuilder func(mem memory.Allocator) array.Builder +}{ + { + Name: "string", + StorageType: arrow.BinaryTypes.String, + StorageBuilder: func(mem memory.Allocator) array.Builder { return array.NewStringBuilder(mem) }, + }, + { + Name: "large_string", + StorageType: arrow.BinaryTypes.LargeString, + StorageBuilder: func(mem memory.Allocator) array.Builder { return array.NewLargeStringBuilder(mem) }, + }, + { + Name: "string_view", + StorageType: arrow.BinaryTypes.StringView, + StorageBuilder: func(mem memory.Allocator) array.Builder { return array.NewStringViewBuilder(mem) }, + }, +} + +func TestJSONTypeCreateFromArray(t *testing.T) { + for _, tc := range jsonTestCases { + t.Run(tc.Name, func(t *testing.T) { + typ, err := extensions.NewJSONType(tc.StorageType) + require.NoError(t, err) + + bldr := tc.StorageBuilder(memory.DefaultAllocator) + defer bldr.Release() + + bldr.AppendValueFromString(`"foobar"`) + bldr.AppendNull() + bldr.AppendValueFromString(`{"foo": "bar"}`) + bldr.AppendValueFromString(`42`) + bldr.AppendValueFromString(`true`) + bldr.AppendValueFromString(`[1, true, "3", null, {"five": 5}]`) + + storage := bldr.NewArray() + defer storage.Release() + + arr := array.NewExtensionArrayWithStorage(typ, storage) + defer arr.Release() + + assert.Equal(t, 6, arr.Len()) + assert.Equal(t, 1, arr.NullN()) + + jsonArr, ok := arr.(*extensions.JSONArray) + require.True(t, ok) + + require.Equal(t, "foobar", jsonArr.Value(0)) + require.Equal(t, nil, jsonArr.Value(1)) + require.Equal(t, map[string]any{"foo": "bar"}, jsonArr.Value(2)) + require.Equal(t, float64(42), jsonArr.Value(3)) + require.Equal(t, true, jsonArr.Value(4)) + require.Equal(t, []any{float64(1), true, "3", nil, map[string]any{"five": float64(5)}}, jsonArr.Value(5)) + }) + } +} + +func TestJSONTypeBatchIPCRoundTrip(t *testing.T) { + for _, tc := range jsonTestCases { + t.Run(tc.Name, func(t *testing.T) { + typ, err := extensions.NewJSONType(tc.StorageType) + require.NoError(t, err) + + bldr := tc.StorageBuilder(memory.DefaultAllocator) + defer bldr.Release() + + bldr.AppendValueFromString(`"foobar"`) + bldr.AppendNull() + bldr.AppendValueFromString(`{"foo": "bar"}`) + bldr.AppendValueFromString(`42`) + bldr.AppendValueFromString(`true`) + bldr.AppendValueFromString(`[1, true, "3", null, {"five": 5}]`) + + storage := bldr.NewArray() + defer storage.Release() + + arr := array.NewExtensionArrayWithStorage(typ, storage) + defer arr.Release() + + batch := array.NewRecord(arrow.NewSchema([]arrow.Field{{Name: "field", Type: typ, Nullable: true}}, nil), + []arrow.Array{arr}, -1) + defer batch.Release() + + var written arrow.Record + { + var buf bytes.Buffer + wr := ipc.NewWriter(&buf, ipc.WithSchema(batch.Schema())) + require.NoError(t, wr.Write(batch)) + require.NoError(t, wr.Close()) + + rdr, err := ipc.NewReader(&buf) + require.NoError(t, err) + written, err = rdr.Read() + require.NoError(t, err) + written.Retain() + defer written.Release() + rdr.Release() + } + + assert.Truef(t, batch.Schema().Equal(written.Schema()), "expected: %s, got: %s", + batch.Schema(), written.Schema()) + + assert.Truef(t, array.RecordEqual(batch, written), "expected: %s, got: %s", + batch, written) + }) + } +} + +func TestMarshallJSONArray(t *testing.T) { + for _, tc := range jsonTestCases { + t.Run(tc.Name, func(t *testing.T) { + typ, err := extensions.NewJSONType(tc.StorageType) + require.NoError(t, err) + + bldr := tc.StorageBuilder(memory.DefaultAllocator) + defer bldr.Release() + + bldr.AppendValueFromString(`"foobar"`) + bldr.AppendNull() + bldr.AppendValueFromString(`{"foo": "bar"}`) + bldr.AppendValueFromString(`42`) + bldr.AppendValueFromString(`true`) + bldr.AppendValueFromString(`[1, true, "3", null, {"five": 5}]`) + + storage := bldr.NewArray() + defer storage.Release() + + arr := array.NewExtensionArrayWithStorage(typ, storage) + defer arr.Release() + + assert.Equal(t, 6, arr.Len()) + assert.Equal(t, 1, arr.NullN()) + + jsonArr, ok := arr.(*extensions.JSONArray) + require.True(t, ok) + + b, err := jsonArr.MarshalJSON() + require.NoError(t, err) + + expectedJSON := `["foobar",null,{"foo":"bar"},42,true,[1,true,"3",null,{"five":5}]]` + require.Equal(t, expectedJSON, string(b)) + require.Equal(t, expectedJSON, jsonArr.String()) + }) + } +} + +func TestJSONRecordToJSON(t *testing.T) { + for _, tc := range jsonTestCases { + t.Run(tc.Name, func(t *testing.T) { + typ, err := extensions.NewJSONType(tc.StorageType) + require.NoError(t, err) + + bldr := tc.StorageBuilder(memory.DefaultAllocator) + defer bldr.Release() + + bldr.AppendValueFromString(`"foobar"`) + bldr.AppendNull() + bldr.AppendValueFromString(`{"foo": "bar"}`) + bldr.AppendValueFromString(`42`) + bldr.AppendValueFromString(`true`) + bldr.AppendValueFromString(`[1, true, "3", null, {"five": 5}]`) + + storage := bldr.NewArray() + defer storage.Release() + + arr := array.NewExtensionArrayWithStorage(typ, storage) + defer arr.Release() + + assert.Equal(t, 6, arr.Len()) + assert.Equal(t, 1, arr.NullN()) + + jsonArr, ok := arr.(*extensions.JSONArray) + require.True(t, ok) + + rec := array.NewRecord(arrow.NewSchema([]arrow.Field{{Name: "json", Type: typ, Nullable: true}}, nil), []arrow.Array{jsonArr}, 6) + defer rec.Release() + + buf := bytes.NewBuffer([]byte("\n")) // expected output has leading newline for clearer formatting + require.NoError(t, array.RecordToJSON(rec, buf)) + + expectedJSON := strings.ReplaceAll(` + {"json":"foobar"} + {"json":null} + {"json":{"foo":"bar"}} + {"json":42} + {"json":true} + {"json":[1,true,"3",null,{"five":5}]}`, + "\t", "") + "\n" // strip indentation, add trailing newline + require.Equal(t, expectedJSON, buf.String()) Review Comment: you could probably use `JSONEq` instead of needing to do the ReplaceAll -- This is an automated message from the Apache Git Service. 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