forked from OSchip/llvm-project
130 lines
3.1 KiB
C++
130 lines
3.1 KiB
C++
//===- llvm/unittest/ADT/polymorphic_ptr.h - polymorphic_ptr<T> tests -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "gtest/gtest.h"
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#include "llvm/ADT/polymorphic_ptr.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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struct S {
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S(int x) : x(x) {}
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S *clone() { return new S(*this); }
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int x;
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};
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// A function that forces the return of a copy.
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template <typename T>
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T dummy_copy(const T &arg) { return arg; }
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TEST(polymorphic_ptr_test, Basic) {
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polymorphic_ptr<S> null;
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EXPECT_FALSE((bool)null);
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EXPECT_TRUE(!null);
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EXPECT_EQ((S*)0, null.get());
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S *s = new S(42);
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polymorphic_ptr<S> p(s);
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EXPECT_TRUE((bool)p);
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EXPECT_FALSE(!p);
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EXPECT_TRUE(p != null);
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EXPECT_FALSE(p == null);
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EXPECT_TRUE(p == s);
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EXPECT_TRUE(s == p);
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EXPECT_FALSE(p != s);
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EXPECT_FALSE(s != p);
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EXPECT_EQ(s, &*p);
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EXPECT_EQ(s, p.operator->());
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EXPECT_EQ(s, p.get());
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EXPECT_EQ(42, p->x);
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EXPECT_EQ(s, p.take());
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EXPECT_FALSE((bool)p);
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EXPECT_TRUE(!p);
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p = s;
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EXPECT_TRUE((bool)p);
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EXPECT_FALSE(!p);
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EXPECT_EQ(s, &*p);
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EXPECT_EQ(s, p.operator->());
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EXPECT_EQ(s, p.get());
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EXPECT_EQ(42, p->x);
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polymorphic_ptr<S> p2((llvm_move(p)));
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#if !LLVM_HAS_RVALUE_REFERENCES
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// 'p' may not have been moved from in C++98, fake it for the test.
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p2 = p.take();
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#endif
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EXPECT_FALSE((bool)p);
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EXPECT_TRUE(!p);
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EXPECT_TRUE((bool)p2);
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EXPECT_FALSE(!p2);
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EXPECT_EQ(s, &*p2);
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using std::swap;
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swap(p, p2);
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EXPECT_TRUE((bool)p);
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EXPECT_FALSE(!p);
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EXPECT_EQ(s, &*p);
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EXPECT_FALSE((bool)p2);
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EXPECT_TRUE(!p2);
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// Force copies and that everything survives.
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polymorphic_ptr<S> p3 = dummy_copy(polymorphic_ptr<S>(p));
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EXPECT_TRUE((bool)p3);
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EXPECT_FALSE(!p3);
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EXPECT_NE(s, &*p3);
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EXPECT_EQ(42, p3->x);
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// Force copies of null without trying to dereference anything.
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polymorphic_ptr<S> null_copy = dummy_copy(polymorphic_ptr<S>(null));
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EXPECT_FALSE((bool)null_copy);
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EXPECT_TRUE(!null_copy);
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EXPECT_EQ(null, null_copy);
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}
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struct Base {
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virtual ~Base() {}
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virtual Base *clone() = 0;
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virtual StringRef name() { return "Base"; }
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};
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struct DerivedA : Base {
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virtual DerivedA *clone() { return new DerivedA(); }
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virtual StringRef name() { return "DerivedA"; }
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};
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struct DerivedB : Base {
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virtual DerivedB *clone() { return new DerivedB(); }
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virtual StringRef name() { return "DerivedB"; }
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};
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TEST(polymorphic_ptr_test, Polymorphism) {
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polymorphic_ptr<Base> a(new DerivedA());
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polymorphic_ptr<Base> b(new DerivedB());
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EXPECT_EQ("DerivedA", a->name());
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EXPECT_EQ("DerivedB", b->name());
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polymorphic_ptr<Base> copy = dummy_copy(a);
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EXPECT_NE(a, copy);
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EXPECT_EQ("DerivedA", copy->name());
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copy = dummy_copy(b);
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EXPECT_NE(b, copy);
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EXPECT_EQ("DerivedB", copy->name());
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// Test creating a copy out of a temporary directly.
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copy = dummy_copy<polymorphic_ptr<Base> >(new DerivedA());
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EXPECT_NE(a, copy);
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EXPECT_EQ("DerivedA", copy->name());
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}
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}
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