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// Author: Diffblue Ltd.
#include <util/c_types.h>
#include <util/pointer_expr.h>
#include <util/pointer_predicates.h>
#include <testing-utils/invariant.h>
#include <testing-utils/use_catch.h>
TEST_CASE("pointer_offset_exprt", "[core][util]")
{
const exprt pointer = symbol_exprt{"foo", pointer_type(void_type())};
const pointer_offset_exprt pointer_offset{pointer, size_type()};
SECTION("Is equivalent to free function.")
{
CHECK(::pointer_offset(pointer) == pointer_offset);
}
SECTION("Result type")
{
CHECK(pointer_offset.type() == size_type());
}
SECTION("Pointer operand accessor")
{
CHECK(pointer_offset.pointer() == pointer);
}
SECTION("Downcasting")
{
const exprt &upcast = pointer_offset;
CHECK(expr_try_dynamic_cast<pointer_offset_exprt>(pointer_offset));
CHECK_FALSE(expr_try_dynamic_cast<pointer_object_exprt>(upcast));
SECTION("Validation")
{
SECTION("Invalid operand")
{
unary_exprt invalid_type = pointer_offset;
invalid_type.op().type() = bool_typet{};
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<pointer_offset_exprt>(invalid_type),
invariant_failedt,
invariant_failure_containing(
"pointer_offset must have pointer-typed operand"));
}
SECTION("Missing operand")
{
exprt missing_operand = pointer_offset;
missing_operand.operands().clear();
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<pointer_offset_exprt>(missing_operand),
invariant_failedt,
invariant_failure_containing("pointer_offset must have one operand"));
}
SECTION("Too many operands")
{
exprt two_operands = pointer_offset;
two_operands.operands().push_back(pointer);
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<pointer_offset_exprt>(two_operands),
invariant_failedt,
invariant_failure_containing("pointer_offset must have one operand"));
}
}
}
}
TEST_CASE("pointer_object_exprt", "[core][util]")
{
const exprt pointer = symbol_exprt{"foo", pointer_type(void_type())};
const pointer_object_exprt pointer_object{pointer, size_type()};
SECTION("Is equivalent to free function.")
{
CHECK(::pointer_object(pointer) == pointer_object);
}
SECTION("Result type")
{
CHECK(pointer_object.type() == size_type());
}
SECTION("Pointer operand accessor")
{
CHECK(pointer_object.pointer() == pointer);
}
SECTION("Downcasting")
{
const exprt &upcast = pointer_object;
CHECK(expr_try_dynamic_cast<pointer_object_exprt>(pointer_object));
CHECK_FALSE(expr_try_dynamic_cast<pointer_offset_exprt>(upcast));
SECTION("Validation")
{
SECTION("Invalid operand")
{
unary_exprt invalid_type = pointer_object;
invalid_type.op().type() = bool_typet{};
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<pointer_object_exprt>(invalid_type),
invariant_failedt,
invariant_failure_containing(
"pointer_object must have pointer-typed operand"));
}
SECTION("Missing operand")
{
exprt missing_operand = pointer_object;
missing_operand.operands().clear();
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<pointer_object_exprt>(missing_operand),
invariant_failedt,
invariant_failure_containing("pointer_object must have one operand"));
}
SECTION("Too many operands")
{
exprt two_operands = pointer_object;
two_operands.operands().push_back(pointer);
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<pointer_object_exprt>(two_operands),
invariant_failedt,
invariant_failure_containing("pointer_object must have one operand"));
}
}
}
}
TEST_CASE("object_size_exprt", "[core][util]")
{
const exprt pointer = symbol_exprt{"foo", pointer_type(void_type())};
const object_size_exprt object_size{pointer, size_type()};
SECTION("Is equivalent to free function.")
{
CHECK(::object_size(pointer) == object_size);
}
SECTION("Result type")
{
CHECK(object_size.type() == size_type());
}
SECTION("Pointer operand accessor")
{
CHECK(object_size.pointer() == pointer);
}
SECTION("Downcasting")
{
const exprt &upcast = object_size;
CHECK(expr_try_dynamic_cast<object_size_exprt>(upcast));
CHECK_FALSE(expr_try_dynamic_cast<pointer_object_exprt>(upcast));
SECTION("Validation")
{
SECTION("Invalid operand")
{
unary_exprt invalid_type = object_size;
invalid_type.op().type() = bool_typet{};
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<object_size_exprt>(invalid_type),
invariant_failedt,
invariant_failure_containing(
"Object size expression must have pointer typed operand."));
}
SECTION("Missing operand")
{
exprt missing_operand = object_size;
missing_operand.operands().clear();
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<object_size_exprt>(missing_operand),
invariant_failedt,
invariant_failure_containing(
"Object size expression must have one operand"));
}
SECTION("Too many operands")
{
exprt two_operands = object_size;
two_operands.operands().push_back(pointer);
const cbmc_invariants_should_throwt invariants_throw;
REQUIRE_THROWS_MATCHES(
expr_try_dynamic_cast<object_size_exprt>(two_operands),
invariant_failedt,
invariant_failure_containing(
"Object size expression must have one operand"));
}
}
}
}
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