Basic unit tests for PointerUnion

llvm-svn: 188933

1 files changed, 64 insertions, 0 deletions

diff --git a/llvm/unittests/ADT/PointerUnionTest.cpp b/llvm/unittests/ADT/PointerUnionTest.cpp
new file mode 100644
index 0000000..7eb7181
--- /dev/null
+++ b/llvm/unittests/ADT/PointerUnionTest.cpp
@@ -0,0 +1,64 @@
+//===- llvm/unittest/ADT/PointerUnionTest.cpp - Optional unit tests -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/PointerUnion.h"
+using namespace llvm;
+
+namespace {
+
+typedef PointerUnion<int*, float*> PU;
+
+// Test fixture
+class PointerUnionTest : public testing::Test {
+};
+
+float f = 3.14f;
+int i = 42;
+
+const PU a(&f);
+const PU b(&i);
+const PU n;
+
+TEST_F(PointerUnionTest, Comparison) {
+  EXPECT_TRUE(a != b);
+  EXPECT_FALSE(a == b);
+  EXPECT_TRUE(b != n);
+  EXPECT_FALSE(b == n);
+}
+
+TEST_F(PointerUnionTest, Null) {
+  EXPECT_FALSE(a.isNull());
+  EXPECT_FALSE(b.isNull());
+  EXPECT_TRUE(n.isNull());
+  EXPECT_FALSE(!a);
+  EXPECT_FALSE(!b);
+  EXPECT_TRUE(!n);
+  // workaround an issue with EXPECT macros and explicit bool
+  EXPECT_TRUE((bool)a);
+  EXPECT_TRUE((bool)b);
+  EXPECT_FALSE(n);
+}
+
+TEST_F(PointerUnionTest, Is) {
+  EXPECT_FALSE(a.is<int*>());
+  EXPECT_TRUE(a.is<float*>());
+  EXPECT_TRUE(b.is<int*>());
+  EXPECT_FALSE(b.is<float*>());
+  EXPECT_TRUE(n.is<int*>());
+  EXPECT_FALSE(n.is<float*>());
+}
+
+TEST_F(PointerUnionTest, Get) {
+  EXPECT_EQ(a.get<float*>(), &f);
+  EXPECT_EQ(b.get<int*>(), &i);
+  EXPECT_EQ(n.get<int*>(), (int*)0);
+}
+
+} // end anonymous namespace