Added test folder for static assert tests (more tests will follow)

CMakeLists.txt

@@ -58,6 +58,7 @@ target_compile_features(sqlpp11 INTERFACE
 endif ()
 
 add_subdirectory(tests)
+add_subdirectory(test_static_asserts)
 add_subdirectory(test_constraints)
 add_subdirectory(examples)
 

test_static_asserts/CMakeLists.txt

@@ -0,0 +1,32 @@
+# Copyright (c) 2013-2015, 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.
+
+function(test_compile name)
+  set(target sqlpp11_${name})
+  add_executable(${target} ${name}.cpp)
+  target_link_libraries(${target} PRIVATE sqlpp11 sqlpp11_testing)
+endfunction()
+
+test_compile(aggregates)
+

test_static_asserts/aggregates.cpp

@@ -66,22 +66,33 @@ namespace sqlpp
   }
 }
 
-SQLPP_ALIAS_PROVIDER(whatever);
-
-int Aggregates(int, char**)
+namespace
 {
+  SQLPP_ALIAS_PROVIDER(whatever);
   using sqlpp::test::run_check;
-
-  // test::TabFoo f;
-  test::TabBar t;
+  static constexpr auto t = test::TabBar{};
 
   // If there is no group_by, we can select whatever we want
+  void no_group_by()
+  {
     run_check(select(all_of(t)).from(t).where(true));
     run_check(select(t.alpha).from(t).where(true));
     run_check(select(count(t.alpha)).from(t).where(true));
+  }
+
+  // If there is a dynamic group_by, we can still select whatever we want
+  // because there is no way of knowing which expressions might have been added dynamically
+  void dynamic_group_by()
+  {
+    run_check(select(all_of(t)).from(t).where(true));
+    run_check(select(t.alpha).from(t).where(true));
+    run_check(select(count(t.alpha)).from(t).where(true));
+  }
 
   // If there is a static group_by, selected columns must be made of group_by expressions, or aggregate expression (e.g.
   // count(t.id)) or values to be valid
+  void static_group_by_ok()
+  {
     run_check(select(t.alpha).from(t).where(true).group_by(t.alpha));
     run_check(select((t.alpha + 42).as(whatever)).from(t).where(true).group_by(t.alpha));
     run_check(select((t.alpha + 42).as(whatever)).from(t).where(true).group_by(t.alpha, t.alpha + t.delta * 17));
@@ -99,12 +110,23 @@ int Aggregates(int, char**)
 
     run_check(select(sqlpp::value(1).as(whatever)).from(t).where(true).group_by(t.alpha));
     run_check(select(sqlpp::value("whatever").as(whatever)).from(t).where(true).group_by(t.alpha));
+  }
 
-  // Otherwise, they are invalid
+  // Failures with static group_by and selected non-aggregates or incorrect aggregates
+  void static_group_by_nok()
+  {
     run_check<sqlpp::assert_aggregates_t>(select(t.beta).from(t).where(true).group_by(t.alpha));
-  run_check<sqlpp::assert_aggregates_t>(select((t.alpha + t.delta).as(whatever)).from(t).where(true).group_by(t.alpha));
+    run_check<sqlpp::assert_aggregates_t>(
+        select((t.alpha + t.delta).as(whatever)).from(t).where(true).group_by(t.alpha));
     run_check<sqlpp::assert_aggregates_t>(
         select((t.alpha + t.delta).as(whatever)).from(t).where(true).group_by(t.alpha, t.alpha + t.delta * 17));
-
-  return 0;
+  }
+}
+
+int main(int, char**)
+{
+  no_group_by();
+  dynamic_group_by();
+  static_group_by_ok();
+  static_group_by_nok();
 }

tests/CMakeLists.txt

@@ -30,7 +30,6 @@ target_compile_options(sqlpp11_testing INTERFACE -Wall -Wextra -pedantic)
 endif ()
 
 set(test_names
-  Aggregates
   BooleanExpression
   CustomQuery
   Interpret