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/*******************************************************************\
Module: Array Access Unit Tests
Author: Jez Higgins
\*******************************************************************/
#include <util/arith_tools.h>
#include <util/mathematical_types.h>
#include <util/symbol_table.h>
#include <analyses/variable-sensitivity/abstract_environment.h>
#include <analyses/variable-sensitivity/abstract_object.h>
#include <analyses/variable-sensitivity/context_abstract_object.h>
#include <analyses/variable-sensitivity/full_array_abstract_object.h>
#include <analyses/variable-sensitivity/variable_sensitivity_object_factory.h>
#include <testing-utils/use_catch.h>
void test_array(
std::vector<int> contents,
abstract_environmentt &environment,
namespacet &ns);
const auto TOP = -99;
SCENARIO(
"eval-member-access",
"[core][analyses][variable-sensitivity][eval-member-access]")
{
auto environment =
abstract_environmentt{variable_sensitivity_object_factoryt::configured_with(
vsd_configt::constant_domain())};
environment.make_top(); // Domains are bottom on construction
symbol_tablet symbol_table;
namespacet ns{symbol_table};
GIVEN("An array of {1, 2, 3}")
{
test_array({1, 2, 3}, environment, ns);
}
GIVEN("An array of {1, 2, TOP}")
{
test_array({1, 2, TOP}, environment, ns);
}
GIVEN("An array of {TOP, 2, TOP}")
{
test_array({TOP, 2, TOP}, environment, ns);
}
}
exprt make_array(
std::vector<int> contents,
abstract_environmentt &environment,
namespacet &ns);
exprt fetch_element(
int index,
exprt &array,
abstract_environmentt &environment,
namespacet &ns);
exprt integer_expression(int i);
exprt top_expression();
void test_array(
std::vector<int> values,
abstract_environmentt &environment,
namespacet &ns)
{
auto array = make_array(values, environment, ns);
WHEN("getting index 0")
{
auto result_expr = fetch_element(0, array, environment, ns);
THEN("we get the first element")
{
auto result_str = result_expr.pretty();
REQUIRE(result_expr == integer_expression(values[0]));
}
}
WHEN("getting index 2")
{
auto result_expr = fetch_element(2, array, environment, ns);
THEN("we get the third element")
{
auto result_str = result_expr.pretty();
REQUIRE(result_expr == integer_expression(values[2]));
}
}
WHEN("getting index 5")
{
auto result_expr = fetch_element(5, array, environment, ns);
THEN("we get a nil element")
{
auto result_str = result_expr.pretty();
REQUIRE(result_expr == nil_exprt());
}
}
}
exprt fetch_element(
int index,
exprt &array,
abstract_environmentt &environment,
namespacet &ns)
{
auto index_expression =
index_exprt(array, from_integer(index, integer_typet()));
auto element = environment.eval(index_expression, ns);
auto object =
std::dynamic_pointer_cast<const context_abstract_objectt>(element);
REQUIRE(object);
if(object->is_top()) // oh!
return object->to_constant();
auto value =
std::dynamic_pointer_cast<const abstract_objectt>(object->unwrap_context());
REQUIRE(value);
return value->to_constant();
}
exprt make_array(
std::vector<int> contents,
abstract_environmentt &environment,
namespacet &ns)
{
const array_typet array_type(
integer_typet(), from_integer(contents.size(), integer_typet()));
exprt::operandst array_elements;
for(auto v : contents)
{
array_elements.push_back(integer_expression(v));
}
auto populate_array = array_exprt(array_elements, array_type);
auto array_value = std::make_shared<full_array_abstract_objectt>(
populate_array, environment, ns);
REQUIRE_FALSE(array_value->is_top());
REQUIRE_FALSE(array_value->is_bottom());
auto array = symbolt();
array.name = array.base_name = array.pretty_name = "array";
array.type = array_type;
environment.assign(array.symbol_expr(), array_value, ns);
return array.symbol_expr();
}
exprt integer_expression(int i)
{
return (i == TOP) ? top_expression() : from_integer(i, integer_typet());
}
exprt top_expression()
{
auto top_value =
std::make_shared<abstract_objectt>(integer_typet(), true, false);
return top_value->to_constant();
}
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