Made from() testable with portable static asserts, added tests

Added cross_join_t, simplifying join a lot
2026-05-20 02:28:42 -05:00 · 2016-02-28 12:07:56 +01:00
parent f774dca912
commit 20adfb66c9
12 changed files with 336 additions and 129 deletions
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2015-2016, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <iostream>
+#include "MockDb.h"
+#include "Sample.h"
+#include <sqlpp11/sqlpp11.h>
+
+namespace
+{
+  constexpr auto t = test::TabBar{};
+  constexpr auto f = test::TabFoo{};
+
+  template <typename T>
+  void print_type_on_error(std::true_type)
+  {
+  }
+
+  template <typename T>
+  void print_type_on_error(std::false_type)
+  {
+    T::_print_me_;
+  }
+
+  template <typename Assert, typename Expression>
+  void from_static_check(const Expression& expression)
+  {
+    using CheckResult = sqlpp::check_from_static_t<Expression>;
+    using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
+    print_type_on_error<CheckResult>(ExpectedCheckResult{});
+    static_assert(ExpectedCheckResult::value, "Unexpected check result");
+
+    using ReturnType = decltype(select(t.alpha).from(expression));
+    using ExpectedReturnType =
+        sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, sqlpp::bad_statement>::value>;
+    print_type_on_error<ReturnType>(ExpectedReturnType{});
+    static_assert(ExpectedReturnType::value, "Unexpected return type");
+  }
+
+  template <typename Assert, typename Expression>
+  void from_dynamic_check(const Expression& expression)
+  {
+    static auto db = MockDb{};
+    using CheckResult = sqlpp::check_from_dynamic_t<decltype(db), Expression>;
+    using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
+    print_type_on_error<CheckResult>(ExpectedCheckResult{});
+    static_assert(ExpectedCheckResult::value, "Unexpected check result");
+
+    using ReturnType = decltype(dynamic_select(db, t.alpha).dynamic_from(expression));
+    using ExpectedReturnType =
+        sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, sqlpp::bad_statement>::value>;
+    print_type_on_error<ReturnType>(ExpectedReturnType{});
+    static_assert(ExpectedReturnType::value, "Unexpected return type");
+  }
+
+  void static_from()
+  {
+    // OK
+    from_static_check<sqlpp::consistent_t>(t);
+    from_static_check<sqlpp::consistent_t>(t.join(f).unconditionally());
+    from_static_check<sqlpp::consistent_t>(t.join(f).on(t.alpha > f.omega));
+
+    // Try a bunch of non-tables
+    from_static_check<sqlpp::assert_from_table_t>(7);
+    from_static_check<sqlpp::assert_from_table_t>(t.alpha);
+    from_static_check<sqlpp::assert_from_table_t>(t.beta);
+    from_static_check<sqlpp::assert_from_table_t>(t.gamma);
+    from_static_check<sqlpp::assert_from_table_t>(t.delta);
+
+    // Try cross joins (missing condition)
+    from_static_check<sqlpp::assert_from_not_cross_join_t>(t.join(f));
+  }
+
+  void dynamic_from()
+  {
+    // OK
+    from_dynamic_check<sqlpp::consistent_t>(t);
+    from_dynamic_check<sqlpp::consistent_t>(t.join(f).unconditionally());
+    from_dynamic_check<sqlpp::consistent_t>(t.join(f).on(t.alpha > f.omega));
+
+    // Try a bunch of non-tables
+    from_dynamic_check<sqlpp::assert_from_table_t>(7);
+    from_dynamic_check<sqlpp::assert_from_table_t>(t.alpha);
+    from_dynamic_check<sqlpp::assert_from_table_t>(t.beta);
+    from_dynamic_check<sqlpp::assert_from_table_t>(t.gamma);
+    from_dynamic_check<sqlpp::assert_from_table_t>(t.delta);
+
+    // Try cross joins (missing condition)
+    from_dynamic_check<sqlpp::assert_from_not_cross_join_t>(t.join(f));
+  }
+}
+
+int main(int, char* [])
+{
+  static_from();
+  dynamic_from();
+}