pvary commented on code in PR #16575:
URL: https://github.com/apache/iceberg/pull/16575#discussion_r3311442887
##########
data/src/test/java/org/apache/iceberg/data/BaseFormatModelTests.java:
##########
@@ -1662,6 +1598,69 @@ void
testReadFileWithoutFieldIdsUsingNameMapping(FileFormat fileFormat) throws I
assertEquals(icebergSchema, convertToEngineRecords(genericRecords,
icebergSchema), readRecords);
}
+ @ParameterizedTest
+ @FieldSource("FILE_FORMATS")
+ void testDataWriterOverwrite(FileFormat fileFormat) throws IOException {
+ DataGenerator dataGenerator = new DataGenerators.DefaultSchema();
+ Schema schema = dataGenerator.schema();
+
+ List<Record> genericRecords = dataGenerator.generateRecords();
+ List<T> engineRecords = convertToEngineRecords(genericRecords, schema);
+
+ writeEngineRecords(fileFormat, schema, engineRecords);
+ readAndAssertGenericRecords(fileFormat, schema, genericRecords);
+
+ assertThatThrownBy(() -> writeEngineRecords(fileFormat, schema,
engineRecords))
+ .isInstanceOf(AlreadyExistsException.class)
+ .hasMessageContaining("Already exists");
+
+ genericRecords = dataGenerator.generateRecords();
Review Comment:
I would guess that this is the same records as previously. We might want to
generate new records
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