refs #5374 added checkpoint end unit test for checkpointer class.

git-svn-id: file:///svn/toku/tokudb@47504 c7de825b-a66e-492c-adef-691d508d4ae1

ft/tests/cachetable-checkpointer-class.cc

@@ -14,10 +14,17 @@
 struct checkpointer_test {
   checkpointer m_cp;
   pair_list m_pl;
+  
+  // Tests
   void test_begin_checkpoint();
   void test_pending_bits();
-  void test_update_cachefiles();
   void test_end_checkpoint();
+  
+  // Test Helper
+  void add_pairs(struct cachefile *cf, 
+    ctpair pairs[], 
+    uint32_t count,
+    uint32_t k);
 };
 
 //
@@ -182,24 +189,8 @@ void checkpointer_test::test_pending_bits() {
     // 3. Many hash chain entries.
     //
     const uint32_t count = 3;
-    ctpair pairs[count];
-    for (uint32_t i = 0; i < count; ++i) {
-        CACHEKEY key;
-        key.b = i;
-        uint32_t full_hash = toku_cachetable_hash(&cf, key);
-        pair_init(&(pairs[i]),
-            &cf,
-            key,
-            NULL,
-            attr,
-            CACHETABLE_CLEAN,
-            full_hash,
-            cb,
-            NULL,
-            &ctbl.list);
-
-        m_cp.m_ct->list.put(&pairs[i]);
-    }
+    ctpair pairs[count];    
+    add_pairs(&cf, pairs, count, 0);
     
     m_cp.turn_on_pending_bits();
     
@@ -214,34 +205,142 @@ void checkpointer_test::test_pending_bits() {
         assert(pp);
         m_cp.m_ct->list.evict(pp);
     }
+    
     int r = ctbl.list.destroy();
     assert_zero(r);
 }
 
 //------------------------------------------------------------------------------
-// test_update_cachefiles() -
+// add_pairs() -
 //
-// Description:
+// Description: Adds data (pairs) to the list referenced in the checkpoitner.
 //
-void checkpointer_test::test_update_cachefiles() {
+void checkpointer_test::add_pairs(struct cachefile *cf,
+    ctpair pairs[],
+    uint32_t count,
+    uint32_t k)
+{
+    pair_attr_s attr;
+    attr.size = 0;
+    attr.nonleaf_size = 0;
+    attr.leaf_size = 0;
+    attr.rollback_size = 0;
+    attr.cache_pressure_size = 0;
+    attr.is_valid = true;
+    CACHETABLE_WRITE_CALLBACK cb;
+    
+    for (uint32_t i = k; i < count + k; ++i) {
+        CACHEKEY key;
+        key.b = i;
+        uint32_t full_hash = toku_cachetable_hash(cf, key);
+        pair_init(&(pairs[i]),
+            cf,
+            key,
+            NULL,
+            attr,
+            CACHETABLE_CLEAN,
+            full_hash,
+            cb,
+            NULL,
+            &m_cp.m_ct->list);
 
+        m_cp.m_ct->list.put(&pairs[i]);
+    }
+}
+
+//------------------------------------------------------------------------------
+// get_number_pending_pairs() - 
+//
+// Description: Helper function that iterates over pending list, and returns
+//   the number of pairs discovered.
+// 
+static uint32_t get_number_pending_pairs(pair_list *list)
+{
+    PAIR p;
+    uint32_t count = 0;
+    PAIR head = list->m_pending_head;
+    while((p = list->m_pending_head) != 0)
+    {
+        list->m_pending_head = list->m_pending_head->pending_next;
+        count++;
+    }
+    
+    list->m_pending_head = head;
+    return count;
 }
 
 //------------------------------------------------------------------------------
 // test_end_checkpoint() -
 //
-// Description:
+// Description:  Adds pairs to the list, before and after a checkpoint.
 //
 void checkpointer_test::test_end_checkpoint() {
+    // 1. Init test.
+    cachetable ctbl;
+    ctbl.list.init();
+    m_cp.m_ct = &ctbl;
+
+    cachefile_list cfl;
+    cfl.init();
+    
+    struct cachefile cf;
+    memset(&cf, 0, sizeof(cf));
+    cf.next = NULL;
+    cf.for_checkpoint = true;
+    create_dummy_functions(&cf);
+    
+    m_cp.init(&ctbl, NULL, &cfl);
+    m_cp.m_cf_list->m_head = &cf;
+
+    // 2. Add data before running checkpoint.
+    const uint32_t count = 6;
+    ctpair pairs[count];
+    add_pairs(&cf, pairs, count / 2, 0);
+    assert(m_cp.m_ct->list.m_n_in_table == count / 2);
+    
+    // 3. Call begin checkpoint.
+    m_cp.begin_checkpoint();
+    assert(m_cp.m_checkpoint_num_files == 1);
+    for (uint32_t i = 0; i < count / 2; ++i)
+    {
+        assert(pairs[i].checkpoint_pending);
+    }
+    
+    // 4. Add new data between starting and stopping checkpoint.
+    add_pairs(&cf, pairs, count / 2, count / 2);
+    assert(m_cp.m_ct->list.m_n_in_table == count);
+    for (uint32_t i = count / 2; i < count / 2; ++i)
+    {
+        assert(!pairs[i].checkpoint_pending);
+    }
+    
+    uint32_t pending_pairs = 0;
+    pending_pairs = get_number_pending_pairs(&m_cp.m_ct->list);
+    assert(pending_pairs == count / 2);
+        
+    // 5. Call end checkpoint
+    m_cp.end_checkpoint(NULL, NULL);
+
+    pending_pairs = get_number_pending_pairs(&m_cp.m_ct->list);
+    assert(pending_pairs == 0);
+
+    // Verify that none of the pairs are pending a checkpoint.
+    for (uint32_t i = 0; i < count; ++i)
+    {
+        assert(!pairs[i].checkpoint_pending);
+    }
     
-    /************
-    -add data
-    -call begin checkpoint
-    -add data
-    -call end checkpoint
-    -verify that 2nd added data NOT checkpointed
-    -verify that 1st added data WAS checkpointed
-    *************/
+    // 6. Cleanup
+    for (uint32_t i = 0; i < count; ++i) {
+        CACHEKEY key;
+        key.b = i;
+        uint32_t full_hash = toku_cachetable_hash(&cf, key);
+        PAIR pp = m_cp.m_ct->list.find_pair(&cf, key, full_hash);
+        assert(pp);
+        m_cp.m_ct->list.evict(pp);
+    }
+    int r = ctbl.list.destroy();
+    assert_zero(r);
 }
 
 
@@ -259,7 +358,7 @@ test_main(int argc, const char *argv[]) {
     // Run the tests.
     cp_test.test_begin_checkpoint();
     cp_test.test_pending_bits();
-    cp_test.test_update_cachefiles();
+    cp_test.test_end_checkpoint();
     
     return r;
 }