Source:
public void testMemoryManager() throws Exception { long poolSize = ParquetOutputFormat.getMemoryManager().getTotalMemoryPool(); long rowGroupSize = poolSize / 2; conf.setLong(ParquetOutputFormat.BLOCK_SIZE, rowGroupSize); Assert.assertTrue("Pool should hold 2 full row groups", (2 * rowGroupSize) <= poolSize); Assert.assertTrue("Pool should not hold 3 full row groups", poolSize < (3 * rowGroupSize)); Assert.assertEquals("Allocations should start out at 0", 0, getTotalAllocation()); RecordWriter writer1 = createWriter(1); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("First writer should be limited by row group size", rowGroupSize, getTotalAllocation()); RecordWriter writer2 = createWriter(2); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("Second writer should be limited by row group size", 2 * rowGroupSize, getTotalAllocation()); RecordWriter writer3 = createWriter(3); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); writer1.close(null); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("Allocations should be increased to the row group size", 2 * rowGroupSize, getTotalAllocation()); writer2.close(null); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("Allocations should be increased to the row group size", rowGroupSize, getTotalAllocation()); writer3.close(null); }

Target:
public void testMemoryManager() throws Exception { long poolSize = ParquetOutputFormat.getMemoryManager().getTotalMemoryPool(); long rowGroupSize = poolSize / 2; conf.setLong(ParquetOutputFormat.BLOCK_SIZE, rowGroupSize); Assert.assertTrue("Pool should hold 2 full row groups", (2 * rowGroupSize) <= poolSize); Assert.assertTrue("Pool should not hold 3 full row groups", poolSize < (3 * rowGroupSize)); Assert.assertEquals("Allocations should start out at 0", 0, getTotalAllocation()); RecordWriter writer1 = createWriter(1); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("First writer should be limited by row group size", rowGroupSize, getTotalAllocation()); RecordWriter writer2 = createWriter(2); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("Second writer should be limited by row group size", 2 * rowGroupSize, getTotalAllocation()); RecordWriter writer3 = createWriter(3); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); writer1.close(null); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("Allocations should be increased to the row group size", 2 * rowGroupSize, getTotalAllocation()); writer2.close(null); Assert.assertTrue("Allocations should never exceed pool size", getTotalAllocation() <= poolSize); Assert.assertEquals("Allocations should be increased to the row group size", rowGroupSize, getTotalAllocation()); writer3.close(null); Assert.assertEquals("Allocations should be increased to the row group size", 0, getTotalAllocation()); }