groonga/grnxx at a148d6e [master] Add a test for reverse cursor. (#47) (Groonga-commit) - Groonga - fulltext search engine.

susumu.yata	2014-09-12 18:10:15 +0900 (Fri, 12 Sep 2014)

  New Revision: a148d6e239e672aeec7abd0dc57b0bbea0f2f46c
  https://github.com/groonga/grnxx/commit/a148d6e239e672aeec7abd0dc57b0bbea0f2f46c

  Message:
    Add a test for reverse cursor. (#47)

  Modified files:
    test/test_index.cpp

  Modified: test/test_index.cpp (+63 -0)
===================================================================

--- test/test_index.cpp    2014-09-12 18:09:34 +0900 (29872be)
+++ test/test_index.cpp    2014-09-12 18:10:15 +0900 (fc12850)
@@ -268,6 +268,68 @@ void test_range() {
   assert(count == records.size());
 }
 
+void test_reverse() {
+  constexpr grnxx::Int NUM_ROWS = 1 << 16;
+
+  grnxx::Error error;
+
+  // Create a database with the default options.
+  auto db = grnxx::open_db(&error, "");
+  assert(db);
+
+  // Create a table with the default options.
+  auto table = db->create_table(&error, "Table");
+  assert(table);
+
+  // Create a column.
+  auto column = table->create_column(&error, "Int", grnxx::INT_DATA);
+  assert(column);
+
+  // Create an index.
+  auto index = column->create_index(&error, "Index", grnxx::TREE_INDEX);
+  assert(index);
+
+  // Generate random values.
+  // Int: [0, 100).
+  grnxx::Array<grnxx::Int> values;
+  assert(values.resize(&error, NUM_ROWS + 1));
+  for (grnxx::Int i = 1; i <= NUM_ROWS; ++i) {
+    values.set(i, mersenne_twister() % 100);
+  }
+
+  // Store generated values into columns.
+  for (grnxx::Int i = 1; i <= NUM_ROWS; ++i) {
+    grnxx::Int row_id;
+    assert(table->insert_row(&error, grnxx::NULL_ROW_ID,
+                             grnxx::Datum(), &row_id));
+    assert(row_id == i);
+    assert(column->set(&error, row_id, values[i]));
+  }
+
+  // Create a cursor.
+  grnxx::IndexRange range;
+  range.set_lower_bound(grnxx::Int(10), grnxx::INCLUSIVE_END_POINT);
+  range.set_upper_bound(grnxx::Int(90), grnxx::EXCLUSIVE_END_POINT);
+  grnxx::CursorOptions options;
+  options.order_type = grnxx::REVERSE_ORDER;
+  auto cursor = index->create_cursor(&error, range, options);
+  assert(cursor);
+
+  grnxx::Array<grnxx::Record> records;
+  assert(cursor->read_all(&error, &records) != -1);
+  for (grnxx::Int i = 1; i < records.size(); ++i) {
+    assert(values[records.get_row_id(i)] >= values[records.get_row_id(i)]);
+  }
+
+  grnxx::Int count = 0;
+  for (grnxx::Int i = 1; i <= NUM_ROWS; ++i) {
+    if ((values[i] >= 10) && (values[i] < 90)) {
+      ++count;
+    }
+  }
+  assert(count == records.size());
+}
+
 int main() {
   test_index();
 
@@ -276,6 +338,7 @@ int main() {
   test_remove();
 
   test_range();
+  test_reverse();
 
   return 0;
 }
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[Groonga-commit] groonga/grnxx at a148d6e [master] Add a test for reverse cursor. (#47)