0554d497f8
I was wondering how feasible using this to make downcasts safe would be. These tests would need to build and pass on all our bots, at least. Change-Id: I1753ba58841bf6c17d6ac3af7374518356e1bb05 Reviewed-on: https://skia-review.googlesource.com/81180 Reviewed-by: Brian Salomon <bsalomon@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org>
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkMakeUnique.h"
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#include "SkVptr.h"
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#include "Test.h"
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namespace {
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struct Base {
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virtual ~Base() = default;
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virtual size_t val() const = 0;
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};
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struct SubclassA : public Base {
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SubclassA(size_t val) : fVal(val) {}
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size_t val() const override { return fVal; }
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size_t fVal;
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};
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struct SubclassB : public Base {
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SubclassB() {}
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size_t val() const override { return 42; }
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};
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}
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DEF_TEST(Vptr, r) {
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std::unique_ptr<Base> a = skstd::make_unique<SubclassA>(21),
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b = skstd::make_unique<SubclassB>(),
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c = skstd::make_unique<SubclassA>(22),
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d = skstd::make_unique<SubclassB>();
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// These 4 objects all have unique identities.
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REPORTER_ASSERT(r, a != b);
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REPORTER_ASSERT(r, a != c);
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REPORTER_ASSERT(r, a != d);
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REPORTER_ASSERT(r, b != c);
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REPORTER_ASSERT(r, b != d);
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REPORTER_ASSERT(r, c != d);
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// Only b and d have the same val().
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REPORTER_ASSERT(r, a->val() != b->val());
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REPORTER_ASSERT(r, a->val() != c->val());
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REPORTER_ASSERT(r, a->val() != d->val());
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REPORTER_ASSERT(r, b->val() != c->val());
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REPORTER_ASSERT(r, b->val() == d->val());
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REPORTER_ASSERT(r, c->val() != d->val());
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// SkVptr() returns the same value for objects of the same concrete type.
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REPORTER_ASSERT(r, SkVptr(*a) == SkVptr(*c));
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REPORTER_ASSERT(r, SkVptr(*b) == SkVptr(*d));
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REPORTER_ASSERT(r, SkVptr(*a) != SkVptr(*b));
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}
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