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/*******************************************************************\
Module: Unit tests for variable/sensitivity/abstract_object::merge
Author: DiffBlue Limited
\*******************************************************************/
#include <util/arith_tools.h>
#include <util/bitvector_types.h>
#include <util/interval.h>
#include <util/mp_arith.h>
#include <util/namespace.h>
#include <util/simplify_expr.h>
#include <util/symbol_table.h>
#include <testing-utils/use_catch.h>
#include <random>
#define V(X) (bvrep2integer(X.get(ID_value).c_str(), 32, true))
#define V_(X) (bvrep2integer(X.c_str(), 32, true))
#define CEV(X) (from_integer(mp_integer(X), signedbv_typet(32)))
SCENARIO("get extreme exprt value", "[core][analyses][interval][get_extreme]")
{
GIVEN("A selection of constant_exprts in a std::vector and map")
{
symbol_tablet symbol_table;
namespacet ns(symbol_table);
std::vector<exprt> ve;
for(int i = -100; i <= 100; i++)
{
ve.push_back(from_integer(mp_integer(i), signedbv_typet(32)));
}
WHEN("-20 <= 20 is tested")
{
binary_predicate_exprt op1(CEV(-20), ID_le, CEV(20));
bool interval_eval =
constant_interval_exprt::less_than_or_equal(CEV(-20), CEV(20));
simplify(op1, ns);
THEN("Require it is TRUE")
{
REQUIRE(op1.is_true());
REQUIRE(interval_eval);
}
}
WHEN("20 <= -20 is tested")
{
binary_predicate_exprt op1(CEV(20), ID_le, CEV(-20));
bool interval_eval =
constant_interval_exprt::less_than_or_equal(CEV(20), CEV(-20));
simplify(op1, ns);
THEN("Require it is FALSE")
{
REQUIRE(op1.is_false());
REQUIRE_FALSE(interval_eval);
}
}
WHEN("-20 <= -20 is tested")
{
binary_predicate_exprt op1(CEV(-20), ID_le, CEV(-20));
bool interval_eval =
constant_interval_exprt::less_than_or_equal(CEV(-20), CEV(-20));
simplify(op1, ns);
THEN("Require it is TRUE")
{
REQUIRE(op1.is_true());
REQUIRE(interval_eval);
REQUIRE(constant_interval_exprt::equal(CEV(1), CEV(1)));
}
}
WHEN("Two are selected and min found [20, -20]")
{
std::vector<exprt> selected = {CEV(20), CEV(-20)};
exprt min = constant_interval_exprt::get_extreme(selected, true);
exprt max = constant_interval_exprt::get_extreme(selected, false);
THEN("Min (-20) and max (20) are verified")
{
CAPTURE(min.pretty());
REQUIRE(V(min) == -20);
REQUIRE(V(max) == 20);
}
}
WHEN("Four are selected and min found [-20, 0, 20, 50]")
{
std::vector<exprt> selected = {CEV(-20), CEV(0), CEV(50), CEV(20)};
exprt min = constant_interval_exprt::get_extreme(selected, true);
exprt max = constant_interval_exprt::get_extreme(selected, false);
THEN("Min (-20) and max (50) are verified")
{
REQUIRE(V(min) == -20);
REQUIRE(V(max) == 50);
}
}
WHEN("One is selected [-100]")
{
std::vector<exprt> selected = {CEV(-100)};
exprt min = constant_interval_exprt::get_extreme(selected, true);
exprt max = constant_interval_exprt::get_extreme(selected, false);
THEN("Max (-100) and min (-100) are verified")
{
REQUIRE(V(min) == -100);
REQUIRE(V(max) == -100);
}
}
WHEN("Five are selected [20, 30, 15, 0, -100]")
{
std::vector<exprt> selected = {
CEV(20), CEV(30), CEV(15), CEV(0), CEV(-100)};
exprt min = constant_interval_exprt::get_extreme(selected, true);
exprt max = constant_interval_exprt::get_extreme(selected, false);
THEN("Max (30) and min (-100) are verified")
{
REQUIRE(V(min) == -100);
REQUIRE(V(max) == 30);
}
}
WHEN("All from [-100:100] are selected")
{
exprt min = constant_interval_exprt::get_extreme(ve, true);
exprt max = constant_interval_exprt::get_extreme(ve, false);
THEN("Max (100) and min (-100) are verified")
{
REQUIRE(V(min) == -100);
REQUIRE(V(max) == 100);
}
}
WHEN("All from [-100:100] are shuffled and selected")
{
std::random_device rd;
std::mt19937 g(rd());
std::shuffle(ve.begin(), ve.end(), g);
exprt min = constant_interval_exprt::get_extreme(ve, true);
exprt max = constant_interval_exprt::get_extreme(ve, false);
THEN("Max (100) and min (-100) are verified")
{
REQUIRE(V(min) == -100);
REQUIRE(V(max) == 100);
}
}
}
}
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