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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "libnativehelper_test.h"
#include <memory>
#include "jni.h"
#include "nativehelper/scoped_local_ref.h"
#include "nativehelper/scoped_utf_chars.h"
#include "nativehelper/utils.h"
#include "nativetesthelper_jni/utils.h"
void LibnativehelperTest::SetUp() {
int result = GetJavaVM()->GetEnv(reinterpret_cast<void**>(&mEnv), JNI_VERSION_1_6);
EXPECT_EQ(JNI_OK, result);
EXPECT_NE(nullptr, mEnv);
}
void LibnativehelperTest::TearDown() {
mEnv = nullptr;
}
TEST_F(LibnativehelperTest, GetUtfOrReturn) {
ScopedLocalRef<jstring> j_str(mEnv, mEnv->NewStringUTF("foo"));
std::unique_ptr<ScopedUtfChars> result;
jint ret = [&](JNIEnv* env) -> jint {
ScopedUtfChars str = GET_UTF_OR_RETURN(env, j_str.get());
result.reset(new ScopedUtfChars(std::move(str)));
return 1;
}(mEnv);
EXPECT_EQ(result->c_str(), std::string_view("foo"));
EXPECT_FALSE(mEnv->ExceptionCheck());
EXPECT_EQ(ret, 1);
}
TEST_F(LibnativehelperTest, GetUtfOrReturnVoid) {
ScopedLocalRef<jstring> j_str(mEnv, mEnv->NewStringUTF("foo"));
std::unique_ptr<ScopedUtfChars> result;
[&](JNIEnv* env) -> void {
ScopedUtfChars str = GET_UTF_OR_RETURN_VOID(env, j_str.get());
result.reset(new ScopedUtfChars(std::move(str)));
}(mEnv);
EXPECT_EQ(result->c_str(), std::string_view("foo"));
EXPECT_FALSE(mEnv->ExceptionCheck());
}
TEST_F(LibnativehelperTest, GetUtfOrReturnFailed) {
jint ret = [&](JNIEnv* env) -> jint {
ScopedUtfChars str = GET_UTF_OR_RETURN(env, nullptr);
return 1;
}(mEnv);
EXPECT_TRUE(mEnv->ExceptionCheck());
EXPECT_EQ(ret, 0);
mEnv->ExceptionClear();
}
TEST_F(LibnativehelperTest, GetUtfOrReturnVoidFailed) {
bool execution_completed = false;
[&](JNIEnv* env) -> void {
ScopedUtfChars str = GET_UTF_OR_RETURN_VOID(env, nullptr);
execution_completed = true;
}(mEnv);
EXPECT_TRUE(mEnv->ExceptionCheck());
EXPECT_FALSE(execution_completed);
mEnv->ExceptionClear();
}
TEST_F(LibnativehelperTest, CreateUtfOrReturn) {
std::unique_ptr<ScopedLocalRef<jstring>> result;
jint ret = [&](JNIEnv* env) -> jint {
ScopedLocalRef<jstring> j_str = CREATE_UTF_OR_RETURN(env, "foo");
result.reset(new ScopedLocalRef<jstring>(std::move(j_str)));
return 1;
}(mEnv);
ScopedUtfChars str(mEnv, result->get());
EXPECT_EQ(str.c_str(), std::string_view("foo"));
EXPECT_FALSE(mEnv->ExceptionCheck());
EXPECT_EQ(ret, 1);
}
class MyString : public std::string {
public:
explicit MyString(const char* c_str) : std::string(c_str) {}
// Force clear the string to catch use-after-free issues.
~MyString() { clear(); }
};
// `expr` creates a temporary object and evaluates to it.
TEST_F(LibnativehelperTest, CreateUtfOrReturnExprEvaluatesToTemporary) {
std::unique_ptr<ScopedLocalRef<jstring>> result;
jint ret = [&](JNIEnv* env) -> jint {
ScopedLocalRef<jstring> j_str = CREATE_UTF_OR_RETURN(env, MyString("foo"));
result.reset(new ScopedLocalRef<jstring>(std::move(j_str)));
return 1;
}(mEnv);
ScopedUtfChars str(mEnv, result->get());
EXPECT_EQ(str.c_str(), std::string_view("foo"));
EXPECT_FALSE(mEnv->ExceptionCheck());
EXPECT_EQ(ret, 1);
}
// `expr` creates a temporary object and evaluates to something else backed by it.
TEST_F(LibnativehelperTest, CreateUtfOrReturnExprEvaluatesToValueBackedByTemporary) {
std::unique_ptr<ScopedLocalRef<jstring>> result;
jint ret = [&](JNIEnv* env) -> jint {
ScopedLocalRef<jstring> j_str = CREATE_UTF_OR_RETURN(env, MyString("foo").c_str());
result.reset(new ScopedLocalRef<jstring>(std::move(j_str)));
return 1;
}(mEnv);
ScopedUtfChars str(mEnv, result->get());
EXPECT_EQ(str.c_str(), std::string_view("foo"));
EXPECT_FALSE(mEnv->ExceptionCheck());
EXPECT_EQ(ret, 1);
}
TEST_F(LibnativehelperTest, CreateUtfOrReturnVoid) {
std::unique_ptr<ScopedLocalRef<jstring>> result;
[&](JNIEnv* env) -> void {
ScopedLocalRef<jstring> j_str = CREATE_UTF_OR_RETURN_VOID(env, "foo");
result.reset(new ScopedLocalRef<jstring>(std::move(j_str)));
}(mEnv);
ScopedUtfChars str(mEnv, result->get());
EXPECT_EQ(str.c_str(), std::string_view("foo"));
EXPECT_FALSE(mEnv->ExceptionCheck());
}
TEST_F(LibnativehelperTest, CreateUtfOrReturnFailed) {
JNINativeInterface interface;
interface.NewStringUTF = [](JNIEnv*, const char*) -> jstring { return nullptr; };
JNIEnv fake_env;
fake_env.functions = &interface;
jint ret = [&](JNIEnv* env) -> jint {
ScopedLocalRef<jstring> j_str = CREATE_UTF_OR_RETURN(env, "foo");
return 1;
}(&fake_env);
EXPECT_EQ(ret, 0);
}
TEST_F(LibnativehelperTest, CreateUtfOrReturnVoidFailed) {
JNINativeInterface interface;
interface.NewStringUTF = [](JNIEnv*, const char*) -> jstring { return nullptr; };
JNIEnv fake_env;
fake_env.functions = &interface;
bool execution_completed = false;
[&](JNIEnv* env) -> void {
ScopedLocalRef<jstring> j_str = CREATE_UTF_OR_RETURN_VOID(env, "foo");
execution_completed = true;
}(&fake_env);
EXPECT_FALSE(execution_completed);
}
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