8511256779
git-subtree-dir: third_party/libosmium git-subtree-split: 2282c8450bae55839372a2002db7ca754530d2fc
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
#include "catch.hpp"
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// Define assert() to throw this error. This enables the tests to check that
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// the assert() fails.
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struct assert_error : public std::runtime_error {
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assert_error(const char* what_arg) : std::runtime_error(what_arg) {
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}
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};
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#define assert(x) if (!(x)) { throw(assert_error(#x)); }
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#include <osmium/util/cast.hpp>
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TEST_CASE("static_cast_with_assert") {
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SECTION("same types is always okay") {
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int f = 10;
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auto t = osmium::static_cast_with_assert<int>(f);
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REQUIRE(t == f);
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}
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SECTION("casting to larger type is always okay") {
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int16_t f = 10;
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auto t = osmium::static_cast_with_assert<int32_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast int32_t -> int_16t should not trigger assert for small int") {
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int32_t f = 100;
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auto t = osmium::static_cast_with_assert<int16_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast int32_t -> int_16t should trigger assert for large int") {
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int32_t f = 100000;
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REQUIRE_THROWS_AS(osmium::static_cast_with_assert<int16_t>(f), assert_error);
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}
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SECTION("cast int16_t -> uint16_t should not trigger assert for zero") {
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int16_t f = 0;
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auto t = osmium::static_cast_with_assert<uint16_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast int16_t -> uint16_t should not trigger assert for positive int") {
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int16_t f = 1;
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auto t = osmium::static_cast_with_assert<uint16_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast int16_t -> uint16_t should trigger assert for negative int") {
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int16_t f = -1;
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REQUIRE_THROWS_AS(osmium::static_cast_with_assert<uint16_t>(f), assert_error);
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}
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SECTION("cast uint32_t -> uint_16t should not trigger assert for zero") {
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uint32_t f = 0;
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auto t = osmium::static_cast_with_assert<uint16_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast uint32_t -> uint_16t should not trigger assert for small int") {
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uint32_t f = 100;
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auto t = osmium::static_cast_with_assert<uint16_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast int32_t -> int_16t should trigger assert for large int") {
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uint32_t f = 100000;
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REQUIRE_THROWS_AS(osmium::static_cast_with_assert<uint16_t>(f), assert_error);
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}
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SECTION("cast uint16_t -> int16_t should not trigger assert for small int") {
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uint16_t f = 1;
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auto t = osmium::static_cast_with_assert<int16_t>(f);
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REQUIRE(t == f);
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}
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SECTION("cast uint16_t -> int16_t should trigger assert for large int") {
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uint16_t f = 65000;
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REQUIRE_THROWS_AS(osmium::static_cast_with_assert<int16_t>(f), assert_error);
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}
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}
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