ArnavBalyan commented on code in PR #3268:
URL: https://github.com/apache/parquet-java/pull/3268#discussion_r2296562982


##########
parquet-column/src/test/java/org/apache/parquet/column/mem/TestMemPageStore.java:
##########
@@ -46,19 +49,42 @@ public void test() throws IOException {
     ColumnDescriptor col = new ColumnDescriptor(path, PrimitiveTypeName.INT64, 
2, 2);
     LongStatistics stats = new LongStatistics();
     PageWriter pageWriter = memPageStore.getPageWriter(col);
+
     pageWriter.writePage(BytesInput.from(new byte[735]), 209, stats, 
BIT_PACKED, BIT_PACKED, PLAIN);
     pageWriter.writePage(BytesInput.from(new byte[743]), 209, stats, 
BIT_PACKED, BIT_PACKED, PLAIN);
     pageWriter.writePage(BytesInput.from(new byte[743]), 209, stats, 
BIT_PACKED, BIT_PACKED, PLAIN);
     pageWriter.writePage(BytesInput.from(new byte[735]), 209, stats, 
BIT_PACKED, BIT_PACKED, PLAIN);
+
     PageReader pageReader = memPageStore.getPageReader(col);
     long totalValueCount = pageReader.getTotalValueCount();
-    LOG.info(String.valueOf(totalValueCount));
+    LOG.info("Total value count: " + totalValueCount);
+
+    assertEquals("Expected total value count to be 836 (4 pages * 209 
values)", 836, totalValueCount);
+
     int total = 0;
+    int pageCount = 0;
     do {
       DataPage readPage = pageReader.readPage();
+
+      // Assert page was successfully read
+      assertNotNull("Page should not be null", readPage);
+      // Assert page has expected value count
+      assertEquals("Each page should have 209 values", 209, 
readPage.getValueCount());
+      // Assert encodings when the implementation is DataPageV1
+      if (readPage instanceof DataPageV1) {
+        DataPageV1 v1 = (DataPageV1) readPage;
+        assertEquals("Page repetition level encoding should be BIT_PACKED", 
BIT_PACKED, v1.getRlEncoding());
+        assertEquals("Page definition level encoding should be BIT_PACKED", 
BIT_PACKED, v1.getDlEncoding());
+        assertEquals("Page value encoding should be PLAIN", PLAIN, 
v1.getValueEncoding());
+      }
+
       total += readPage.getValueCount();
-      LOG.info(readPage.toString());
-      // TODO: assert
+      pageCount++;
+      LOG.info("Page " + pageCount + ": " + readPage.toString());

Review Comment:
   Sure will remove



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