llvm-mirror/unittests/Support/ErrorOrTest.cpp
Rafael Espindola 0df15fc77a Finishing touch for the std::error_code transition.
While std::error_code itself seems to work OK in all platforms, there
are few annoying differences with regards to the std::errc enumeration.

This patch adds a simple llvm enumeration, which will hopefully avoid build
breakages in other platforms and surprises as we get more uses of
std::error_code.

llvm-svn: 210920
2014-06-13 17:20:48 +00:00

65 lines
1.5 KiB
C++

//===- unittests/ErrorOrTest.cpp - ErrorOr.h tests ------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/Errc.h"
#include "gtest/gtest.h"
#include <memory>
using namespace llvm;
namespace {
ErrorOr<int> t1() {return 1;}
ErrorOr<int> t2() { return errc::invalid_argument; }
TEST(ErrorOr, SimpleValue) {
ErrorOr<int> a = t1();
// FIXME: This is probably a bug in gtest. EXPECT_TRUE should expand to
// include the !! to make it friendly to explicit bool operators.
EXPECT_TRUE(!!a);
EXPECT_EQ(1, *a);
ErrorOr<int> b = a;
EXPECT_EQ(1, *b);
a = t2();
EXPECT_FALSE(a);
EXPECT_EQ(a.getError(), errc::invalid_argument);
#ifdef EXPECT_DEBUG_DEATH
EXPECT_DEBUG_DEATH(*a, "Cannot get value when an error exists");
#endif
}
ErrorOr<std::unique_ptr<int> > t3() {
return std::unique_ptr<int>(new int(3));
}
TEST(ErrorOr, Types) {
int x;
ErrorOr<int&> a(x);
*a = 42;
EXPECT_EQ(42, x);
// Move only types.
EXPECT_EQ(3, **t3());
}
struct B {};
struct D : B {};
TEST(ErrorOr, Covariant) {
ErrorOr<B*> b(ErrorOr<D*>(nullptr));
b = ErrorOr<D*>(nullptr);
ErrorOr<std::unique_ptr<B> > b1(ErrorOr<std::unique_ptr<D> >(nullptr));
b1 = ErrorOr<std::unique_ptr<D> >(nullptr);
}
} // end anon namespace