diff options
Diffstat (limited to 'tests')
-rw-r--r-- | tests/VptrTest.cpp | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/tests/VptrTest.cpp b/tests/VptrTest.cpp new file mode 100644 index 0000000000..b8a9e1ae0a --- /dev/null +++ b/tests/VptrTest.cpp @@ -0,0 +1,61 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkMakeUnique.h" +#include "SkVptr.h" +#include "Test.h" + +namespace { + + struct Base { + virtual ~Base() = default; + virtual size_t val() const = 0; + }; + + struct SubclassA : public Base { + SubclassA(size_t val) : fVal(val) {} + + size_t val() const override { return fVal; } + + size_t fVal; + }; + + struct SubclassB : public Base { + SubclassB() {} + + size_t val() const override { return 42; } + }; + +} + +DEF_TEST(Vptr, r) { + std::unique_ptr<Base> a = skstd::make_unique<SubclassA>(21), + b = skstd::make_unique<SubclassB>(), + c = skstd::make_unique<SubclassA>(22), + d = skstd::make_unique<SubclassB>(); + + // These 4 objects all have unique identities. + REPORTER_ASSERT(r, a != b); + REPORTER_ASSERT(r, a != c); + REPORTER_ASSERT(r, a != d); + REPORTER_ASSERT(r, b != c); + REPORTER_ASSERT(r, b != d); + REPORTER_ASSERT(r, c != d); + + // Only b and d have the same val(). + REPORTER_ASSERT(r, a->val() != b->val()); + REPORTER_ASSERT(r, a->val() != c->val()); + REPORTER_ASSERT(r, a->val() != d->val()); + REPORTER_ASSERT(r, b->val() != c->val()); + REPORTER_ASSERT(r, b->val() == d->val()); + REPORTER_ASSERT(r, c->val() != d->val()); + + // SkVptr() returns the same value for objects of the same concrete type. + REPORTER_ASSERT(r, SkVptr(*a) == SkVptr(*c)); + REPORTER_ASSERT(r, SkVptr(*b) == SkVptr(*d)); + REPORTER_ASSERT(r, SkVptr(*a) != SkVptr(*b)); +} |