RussellSpitzer commented on code in PR #9803:
URL: https://github.com/apache/iceberg/pull/9803#discussion_r1504794573


##########
spark/v3.5/spark/src/test/java/org/apache/iceberg/spark/actions/TestRewriteDataFilesAction.java:
##########
@@ -1463,6 +1449,176 @@ public void testSnapshotProperty() {
     
assertThat(table.currentSnapshot().summary()).containsKeys(commitMetricsKeys);
   }
 
+  @Test
+  public void testBinPackRewriterWithSpecificOutputSpec() {
+    Table table = createTable(10);
+    shouldHaveFiles(table, 10);
+    Integer previousSpecId = table.spec().specId();
+    // create multiple partition specs with different commit
+    table.updateSpec().addField(Expressions.truncate("c2", 2)).commit();
+    table.updateSpec().addField(Expressions.bucket("c3", 2)).commit();
+
+    /*
+    This is how the table.specs() look like
+     specId :: PartitionSpec
+      0::[]
+      1::[
+        1000: c2_trunc_2: truncate[2](2)
+      ]
+      2::[
+        1000: c2_trunc_2: truncate[2](2)
+        1001: c3_bucket_2: bucket[2](3)
+      ]
+     */
+    // rewrite to the truncate("c2", 2)
+    int outputSpecId = table.specs().size() - 2;
+
+    long dataSizeBefore = testDataSize(table);
+    long count = currentData().size();
+
+    RewriteDataFiles.Result result =
+        basicRewrite(table)
+            .option(RewriteDataFiles.OUTPUT_SPEC_ID, 
String.valueOf(outputSpecId))
+            .option(SizeBasedFileRewriter.REWRITE_ALL, "true")
+            .binPack()
+            .execute();
+
+    assertThat(result.rewrittenBytesCount()).isEqualTo(dataSizeBefore);
+    assertThat(currentData().size()).isEqualTo(count);
+    shouldHaveProvidedPartitionSpec(table, outputSpecId);
+  }
+
+  @Test
+  public void testBinpackRewriteWithInvalidOutputSpecId() {
+    Table table = createTable(10);
+    shouldHaveFiles(table, 10);
+    int previousSpecId = table.spec().specId();
+    // simulate multiple partition specs with different commit
+    table.updateSpec().addField(Expressions.truncate("c2", 2)).commit();

Review Comment:
   not needed for this test



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