* [misc] Enhance unit tests for pivotModel::pureCrystalData() method

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

module/pivot/test/model/purecrystaldata.php

@@ -59,7 +59,27 @@ r($pivotTest->pureCrystalDataTest(array(
     )
 ))) && p('0:slice_group,col1_slice1:value,col1_slice1:type,col1_slice2:value,col1_slice2:type') && e('sliced,10,A,20,B');
 
-// 测试步骤5：复杂多记录数据处理 - 测试多记录和异常数据处理
+// 测试步骤5：多记录数据处理 - 测试多条记录的正确处理
+r($pivotTest->pureCrystalDataTest(array(
+    0 => array(
+        'columns' => array(
+            'col1' => array(
+                'cellData' => array('value' => 200, 'flag' => true)
+            )
+        ),
+        'groups' => array('record' => 'first')
+    ),
+    1 => array(
+        'columns' => array(
+            'col2' => array(
+                'cellData' => array('value' => 300, 'status' => 'active')
+            )
+        ),
+        'groups' => array('record' => 'second')
+    )
+))) && p('1:record,col2:value,col2:status') && e('second,300,active');
+
+// 测试步骤6：null值和空值处理 - 测试null值和空cellData的处理
 r($pivotTest->pureCrystalDataTest(array(
     0 => array(
         'columns' => array(
@@ -71,13 +91,32 @@ r($pivotTest->pureCrystalDataTest(array(
             )
         ),
         'groups' => array('null_group' => null, 'empty_group' => 'test')
-    ),
-    1 => array(
+    )
+))) && p('0:null_group,empty_group,col1:value') && e('~~,test,~~');
+
+// 测试步骤7：复杂嵌套切片数据 - 测试多层嵌套的切片数据处理
+r($pivotTest->pureCrystalDataTest(array(
+    0 => array(
         'columns' => array(
             'col1' => array(
-                'cellData' => array('value' => 200, 'flag' => true)
+                'cellData' => array(
+                    'slice1' => array('value' => 50, 'nested' => array('deep' => 'data')),
+                    'slice2' => array('count' => 25, 'items' => array(1, 2, 3))
+                )
             )
         ),
-        'groups' => array('record' => 'second')
+        'groups' => array('complex' => 'nested')
     )
-))) && p('1:record,col1:value,col1:flag') && e('second,200,1');
+))) && p('0:complex') && e('nested');
+
+// 测试步骤8：边界值数据类型测试 - 测试不同数据类型的值处理
+r($pivotTest->pureCrystalDataTest(array(
+    0 => array(
+        'columns' => array(
+            'col1' => array(
+                'cellData' => array('value' => 0, 'bool_true' => true, 'bool_false' => false, 'string_empty' => '')
+            )
+        ),
+        'groups' => array('boundary' => 'types')
+    )
+))) && p('0:boundary,col1:value,col1:bool_true,col1:bool_false,col1:string_empty') && e('types,0,1,0,~~');