bkietz commented on a change in pull request #10782:
URL: https://github.com/apache/arrow/pull/10782#discussion_r675146941



##########
File path: cpp/src/arrow/csv/column_builder_test.cc
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@@ -400,6 +400,24 @@ TEST_F(InferringColumnBuilderTest, MultipleChunkDate) {
                  ArrayFromJSON(date32(), "[null]")});
 }
 
+TEST_F(InferringColumnBuilderTest, SingleChunkTime) {
+  auto options = ConvertOptions::Defaults();
+  auto tg = TaskGroup::MakeSerial();
+
+  CheckInferred(tg, {{"", "01:23:45", "NA"}}, options,

Review comment:
       Could you include an integer or date (which should still allow the 
column to be inferred as time)?
   ```suggestion
     CheckInferred(tg, {{"", "99", "01:23:45", "NA"}}, options,
   ```




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