unittests/ADT/PointerUnionTest.cpp

   1 //===- llvm/unittest/ADT/PointerUnionTest.cpp - Optional unit 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 "gtest/gtest.h"
  11 #include "llvm/ADT/PointerUnion.h"
  12 using namespace llvm;
  13
  14 namespace {
  15
  16 typedef PointerUnion<int *, float *> PU;
  17
  18 // Test fixture
  19 class PointerUnionTest : public testing::Test {};
  20
  21 float f = 3.14f;
  22 int i = 42;
  23
  24 const PU a(&f);
  25 const PU b(&i);
  26 const PU n;
  27
  28 TEST_F(PointerUnionTest, Comparison) {
  29   EXPECT_TRUE(a != b);
  30   EXPECT_FALSE(a == b);
  31   EXPECT_TRUE(b != n);
  32   EXPECT_FALSE(b == n);
  33 }
  34
  35 TEST_F(PointerUnionTest, Null) {
  36   EXPECT_FALSE(a.isNull());
  37   EXPECT_FALSE(b.isNull());
  38   EXPECT_TRUE(n.isNull());
  39   EXPECT_FALSE(!a);
  40   EXPECT_FALSE(!b);
  41   EXPECT_TRUE(!n);
  42   // workaround an issue with EXPECT macros and explicit bool
  43   EXPECT_TRUE((bool)a);
  44   EXPECT_TRUE((bool)b);
  45   EXPECT_FALSE(n);
  46 }
  47
  48 TEST_F(PointerUnionTest, Is) {
  49   EXPECT_FALSE(a.is<int *>());
  50   EXPECT_TRUE(a.is<float *>());
  51   EXPECT_TRUE(b.is<int *>());
  52   EXPECT_FALSE(b.is<float *>());
  53   EXPECT_TRUE(n.is<int *>());
  54   EXPECT_FALSE(n.is<float *>());
  55 }
  56
  57 TEST_F(PointerUnionTest, Get) {
  58   EXPECT_EQ(a.get<float *>(), &f);
  59   EXPECT_EQ(b.get<int *>(), &i);
  60   EXPECT_EQ(n.get<int *>(), (int *)0);
  61 }
  62
  63 } // end anonymous namespace