1 files changed, 62 insertions, 0 deletions
diff --git a/src/arrow/js/test/inference/column.ts b/src/arrow/js/test/inference/column.ts
new file mode 100644
index 000000000..440116b69
--- /dev/null
+++ b/src/arrow/js/test/inference/column.ts
@@ -0,0 +1,62 @@
+// 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.
+
+/* eslint-disable jest/no-standalone-expect */
+
+import { Data } from 'apache-arrow/data';
+import { Field } from 'apache-arrow/schema';
+import { Column } from 'apache-arrow/column';
+import { Vector } from 'apache-arrow/vector';
+import { Bool, Int8, Utf8, List, Dictionary, Struct } from 'apache-arrow/type';
+
+const boolType = new Bool();
+const boolVector = Vector.new(Data.Bool(boolType, 0, 10, 0, null, new Uint8Array(2)));
+
+const boolColumn = new Column(new Field('bool', boolType), [
+    Vector.new(Data.Bool(boolType, 0, 10, 0, null, new Uint8Array(2))),
+    Vector.new(Data.Bool(boolType, 0, 10, 0, null, new Uint8Array(2))),
+    Vector.new(Data.Bool(boolType, 0, 10, 0, null, new Uint8Array(2))),
+]);
+
+expect(typeof boolVector.get(0) === 'boolean').toBe(true);
+expect(typeof boolColumn.get(0) === 'boolean').toBe(true);
+
+type IndexSchema = {
+    0: Int8;
+    1: Utf8;
+    2: Dictionary<List<Bool>>;
+};
+
+const structChildFields = [
+    { name: 0, type: new Int8() },
+    { name: 1, type: new Utf8() },
+    { name: 2, type: new Dictionary<List<Bool>>(null!, null!) }
+].map(({ name, type }) => new Field('' + name, type));
+
+const structType = new Struct<IndexSchema>(structChildFields);
+const structVector = Vector.new(Data.Struct(structType, 0, 0, 0, null, []));
+const structColumn = new Column(new Field('struct', structType), [
+    Vector.new(Data.Struct(structType, 0, 0, 0, null, [])),
+    Vector.new(Data.Struct(structType, 0, 0, 0, null, [])),
+    Vector.new(Data.Struct(structType, 0, 0, 0, null, [])),
+]);
+
+const [x1, y1, z1] = structVector.get(0)!;
+const [x2, y2, z2] = structColumn.get(0)!;
+
+console.log(x1, y1, z1);
+console.log(x2, y2, z2);