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// Copyright 2011 Google Inc. All Rights Reserved.
#include "intern_table.h"
#include "common_test.h"
#include "object.h"
namespace art {
class InternTableTest : public CommonTest {};
TEST_F(InternTableTest, Intern) {
InternTable intern_table;
SirtRef<String> foo_1(intern_table.InternStrong(3, "foo"));
SirtRef<String> foo_2(intern_table.InternStrong(3, "foo"));
SirtRef<String> foo_3(String::AllocFromModifiedUtf8("foo"));
SirtRef<String> bar(intern_table.InternStrong(3, "bar"));
EXPECT_TRUE(foo_1->Equals("foo"));
EXPECT_TRUE(foo_2->Equals("foo"));
EXPECT_TRUE(foo_3->Equals("foo"));
EXPECT_TRUE(foo_1.get() != NULL);
EXPECT_TRUE(foo_2.get() != NULL);
EXPECT_EQ(foo_1.get(), foo_2.get());
EXPECT_NE(foo_1.get(), bar.get());
EXPECT_NE(foo_2.get(), bar.get());
EXPECT_NE(foo_3.get(), bar.get());
}
TEST_F(InternTableTest, Size) {
InternTable t;
EXPECT_EQ(0U, t.Size());
t.InternStrong(3, "foo");
SirtRef<String> foo(String::AllocFromModifiedUtf8("foo"));
t.InternWeak(foo.get());
EXPECT_EQ(1U, t.Size());
t.InternStrong(3, "bar");
EXPECT_EQ(2U, t.Size());
}
class TestPredicate {
public:
bool IsMarked(const Object* s) const {
bool erased = false;
typedef std::vector<const String*>::iterator It; // TODO: C++0x auto
for (It it = expected_.begin(), end = expected_.end(); it != end; ++it) {
if (*it == s) {
expected_.erase(it);
erased = true;
break;
}
}
EXPECT_TRUE(erased);
return false;
}
void Expect(const String* s) {
expected_.push_back(s);
}
~TestPredicate() {
EXPECT_EQ(0U, expected_.size());
}
private:
mutable std::vector<const String*> expected_;
};
bool IsMarked(const Object* object, void* arg) {
return reinterpret_cast<TestPredicate*>(arg)->IsMarked(object);
}
TEST_F(InternTableTest, SweepInternTableWeaks) {
InternTable t;
t.InternStrong(3, "foo");
t.InternStrong(3, "bar");
SirtRef<String> hello(String::AllocFromModifiedUtf8("hello"));
SirtRef<String> world(String::AllocFromModifiedUtf8("world"));
SirtRef<String> s0(t.InternWeak(hello.get()));
SirtRef<String> s1(t.InternWeak(world.get()));
EXPECT_EQ(4U, t.Size());
// We should traverse only the weaks...
TestPredicate p;
p.Expect(s0.get());
p.Expect(s1.get());
t.SweepInternTableWeaks(IsMarked, &p);
EXPECT_EQ(2U, t.Size());
// Just check that we didn't corrupt the map.
SirtRef<String> still_here(String::AllocFromModifiedUtf8("still here"));
t.InternWeak(still_here.get());
EXPECT_EQ(3U, t.Size());
}
TEST_F(InternTableTest, ContainsWeak) {
{
// Strongs are never weak.
InternTable t;
SirtRef<String> interned_foo_1(t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_1.get()));
SirtRef<String> interned_foo_2(t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
{
// Weaks are always weak.
InternTable t;
SirtRef<String> foo_1(String::AllocFromModifiedUtf8("foo"));
SirtRef<String> foo_2(String::AllocFromModifiedUtf8("foo"));
EXPECT_NE(foo_1.get(), foo_2.get());
SirtRef<String> interned_foo_1(t.InternWeak(foo_1.get()));
SirtRef<String> interned_foo_2(t.InternWeak(foo_2.get()));
EXPECT_TRUE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
{
// A weak can be promoted to a strong.
InternTable t;
SirtRef<String> foo(String::AllocFromModifiedUtf8("foo"));
SirtRef<String> interned_foo_1(t.InternWeak(foo.get()));
EXPECT_TRUE(t.ContainsWeak(interned_foo_1.get()));
SirtRef<String> interned_foo_2(t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
{
// Interning a weak after a strong gets you the strong.
InternTable t;
SirtRef<String> interned_foo_1(t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_1.get()));
SirtRef<String> foo(String::AllocFromModifiedUtf8("foo"));
SirtRef<String> interned_foo_2(t.InternWeak(foo.get()));
EXPECT_FALSE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
}
} // namespace art
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