rdblue commented on code in PR #6268:
URL: https://github.com/apache/iceberg/pull/6268#discussion_r1032834941


##########
core/src/test/java/org/apache/iceberg/TestPartitionSpecInfo.java:
##########
@@ -85,6 +85,31 @@ public void testSpecInfoPartitionedTable() {
     Assert.assertNull(table.specs().get(Integer.MAX_VALUE));
   }
 
+  @Test
+  public void testColumnDropWithPartitionSpecEvolution() {
+    PartitionSpec spec = 
PartitionSpec.builderFor(schema).identity("id").build();
+    TestTables.TestTable table = TestTables.create(tableDir, "test", schema, 
spec, formatVersion);
+
+    Assert.assertEquals(spec, table.spec());
+
+    TableMetadata base = TestTables.readMetadata("test");
+    PartitionSpec newSpec =
+        
PartitionSpec.builderFor(table.schema()).identity("data").withSpecId(1).build();
+    table.ops().commit(base, base.updatePartitionSpec(newSpec));
+
+    int initialColSize = table.schema().columns().size();
+    table.updateSchema().deleteColumn("id").commit();
+
+    Assert.assertEquals(newSpec, table.spec());
+    Assert.assertEquals(newSpec, table.specs().get(newSpec.specId()));
+    Assert.assertEquals(spec, table.specs().get(spec.specId()));
+    Assert.assertEquals(
+        ImmutableMap.of(spec.specId(), spec, newSpec.specId(), newSpec), 
table.specs());
+    Assert.assertNull(table.specs().get(Integer.MAX_VALUE));
+    Assert.assertEquals(
+        "Schema must have one less column", initialColSize - 1, 
table.schema().columns().size());

Review Comment:
   This check could be better if you produced the expected schema and compared. 
You can use equality comparison for the underlying struct type. Just compare 
`table.schema().asStruct()`.



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