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 struct PointerUnionTest : public testing::Test {
  19   float f;
  20   int i;
  21
  22   PU a, b, c, n;
  23
  24   PointerUnionTest() : f(3.14f), i(42), a(&f), b(&i), c(&i), n() {}
  25 };
  26
  27 TEST_F(PointerUnionTest, Comparison) {
  28   EXPECT_TRUE(a == a);
  29   EXPECT_FALSE(a != a);
  30   EXPECT_TRUE(a != b);
  31   EXPECT_FALSE(a == b);
  32   EXPECT_TRUE(b == c);
  33   EXPECT_FALSE(b != c);
  34   EXPECT_TRUE(b != n);
  35   EXPECT_FALSE(b == n);
  36 }
  37
  38 TEST_F(PointerUnionTest, Null) {
  39   EXPECT_FALSE(a.isNull());
  40   EXPECT_FALSE(b.isNull());
  41   EXPECT_TRUE(n.isNull());
  42   EXPECT_FALSE(!a);
  43   EXPECT_FALSE(!b);
  44   EXPECT_TRUE(!n);
  45   // workaround an issue with EXPECT macros and explicit bool
  46   EXPECT_TRUE((bool)a);
  47   EXPECT_TRUE((bool)b);
  48   EXPECT_FALSE(n);
  49
  50   EXPECT_NE(n, b);
  51   EXPECT_EQ(b, c);
  52   b = nullptr;
  53   EXPECT_EQ(n, b);
  54   EXPECT_NE(b, c);
  55 }
  56
  57 TEST_F(PointerUnionTest, Is) {
  58   EXPECT_FALSE(a.is<int *>());
  59   EXPECT_TRUE(a.is<float *>());
  60   EXPECT_TRUE(b.is<int *>());
  61   EXPECT_FALSE(b.is<float *>());
  62   EXPECT_TRUE(n.is<int *>());
  63   EXPECT_FALSE(n.is<float *>());
  64 }
  65
  66 TEST_F(PointerUnionTest, Get) {
  67   EXPECT_EQ(a.get<float *>(), &f);
  68   EXPECT_EQ(b.get<int *>(), &i);
  69   EXPECT_EQ(n.get<int *>(), (int *)0);
  70 }
  71
  72 } // end anonymous namespace