1 //===- unittests/ErrorOrTest.cpp - ErrorOr.h tests ------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/Support/ErrorOr.h" 11 #include "gtest/gtest.h" 12 #include <memory> 13 14 using namespace llvm; 15 16 namespace { 17 18 ErrorOr<int> t1() {return 1;} 19 ErrorOr<int> t2() { return errc::invalid_argument; } 20 21 TEST(ErrorOr, SimpleValue) { 22 ErrorOr<int> a = t1(); 23 // FIXME: This is probably a bug in gtest. EXPECT_TRUE should expand to 24 // include the !! to make it friendly to explicit bool operators. 25 EXPECT_TRUE(!!a); 26 EXPECT_EQ(1, *a); 27 28 ErrorOr<int> b = a; 29 EXPECT_EQ(1, *b); 30 31 a = t2(); 32 EXPECT_FALSE(a); 33 EXPECT_EQ(errc::invalid_argument, a.getError()); 34 #ifdef EXPECT_DEBUG_DEATH 35 EXPECT_DEBUG_DEATH(*a, "Cannot get value when an error exists"); 36 #endif 37 } 38 39 ErrorOr<std::unique_ptr<int> > t3() { 40 return std::unique_ptr<int>(new int(3)); 41 } 42 43 TEST(ErrorOr, Types) { 44 int x; 45 ErrorOr<int&> a(x); 46 *a = 42; 47 EXPECT_EQ(42, x); 48 49 // Move only types. 50 EXPECT_EQ(3, **t3()); 51 } 52 53 struct B {}; 54 struct D : B {}; 55 56 TEST(ErrorOr, Covariant) { 57 ErrorOr<B*> b(ErrorOr<D*>(0)); 58 b = ErrorOr<D*>(0); 59 60 ErrorOr<std::unique_ptr<B> > b1(ErrorOr<std::unique_ptr<D> >(0)); 61 b1 = ErrorOr<std::unique_ptr<D> >(0); 62 } 63 } // end anon namespace 64