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jni_array_unittest.cc
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jni_array_unittest.cc
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/jni_array.h"
#include <stddef.h>
#include <stdint.h>
#include <limits>
#include "base/android/jni_android.h"
#include "base/android/scoped_java_ref.h"
#include "base/macros.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace android {
TEST(JniArray, BasicConversions) {
const uint8_t kBytes[] = {0, 1, 2, 3};
const size_t kLen = arraysize(kBytes);
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jbyteArray> bytes = ToJavaByteArray(env, kBytes, kLen);
ASSERT_TRUE(bytes.obj());
std::vector<uint8_t> inputVector(kBytes, kBytes + kLen);
ScopedJavaLocalRef<jbyteArray> bytesFromVector =
ToJavaByteArray(env, inputVector);
ASSERT_TRUE(bytesFromVector.obj());
std::vector<uint8_t> vectorFromBytes(5);
std::vector<uint8_t> vectorFromVector(5);
JavaByteArrayToByteVector(env, bytes.obj(), &vectorFromBytes);
JavaByteArrayToByteVector(env, bytesFromVector.obj(), &vectorFromVector);
EXPECT_EQ(4U, vectorFromBytes.size());
EXPECT_EQ(4U, vectorFromVector.size());
std::vector<uint8_t> expected_vec(kBytes, kBytes + kLen);
EXPECT_EQ(expected_vec, vectorFromBytes);
EXPECT_EQ(expected_vec, vectorFromVector);
AppendJavaByteArrayToByteVector(env, bytes.obj(), &vectorFromBytes);
EXPECT_EQ(8U, vectorFromBytes.size());
expected_vec.insert(expected_vec.end(), kBytes, kBytes + kLen);
EXPECT_EQ(expected_vec, vectorFromBytes);
}
void CheckBoolConversion(JNIEnv* env,
const bool* bool_array,
const size_t len,
const ScopedJavaLocalRef<jbooleanArray>& booleans) {
ASSERT_TRUE(booleans.obj());
jsize java_array_len = env->GetArrayLength(booleans.obj());
ASSERT_EQ(static_cast<jsize>(len), java_array_len);
jboolean value;
for (size_t i = 0; i < len; ++i) {
env->GetBooleanArrayRegion(booleans.obj(), i, 1, &value);
ASSERT_EQ(bool_array[i], value);
}
}
TEST(JniArray, BoolConversions) {
const bool kBools[] = {false, true, false};
const size_t kLen = arraysize(kBools);
JNIEnv* env = AttachCurrentThread();
CheckBoolConversion(env, kBools, kLen, ToJavaBooleanArray(env, kBools, kLen));
}
void CheckIntConversion(
JNIEnv* env,
const int* int_array,
const size_t len,
const ScopedJavaLocalRef<jintArray>& ints) {
ASSERT_TRUE(ints.obj());
jsize java_array_len = env->GetArrayLength(ints.obj());
ASSERT_EQ(static_cast<jsize>(len), java_array_len);
jint value;
for (size_t i = 0; i < len; ++i) {
env->GetIntArrayRegion(ints.obj(), i, 1, &value);
ASSERT_EQ(int_array[i], value);
}
}
TEST(JniArray, IntConversions) {
const int kInts[] = {0, 1, -1, std::numeric_limits<int32_t>::min(),
std::numeric_limits<int32_t>::max()};
const size_t kLen = arraysize(kInts);
JNIEnv* env = AttachCurrentThread();
CheckIntConversion(env, kInts, kLen, ToJavaIntArray(env, kInts, kLen));
const std::vector<int> vec(kInts, kInts + kLen);
CheckIntConversion(env, kInts, kLen, ToJavaIntArray(env, vec));
}
void CheckLongConversion(JNIEnv* env,
const int64_t* long_array,
const size_t len,
const ScopedJavaLocalRef<jlongArray>& longs) {
ASSERT_TRUE(longs.obj());
jsize java_array_len = env->GetArrayLength(longs.obj());
ASSERT_EQ(static_cast<jsize>(len), java_array_len);
jlong value;
for (size_t i = 0; i < len; ++i) {
env->GetLongArrayRegion(longs.obj(), i, 1, &value);
ASSERT_EQ(long_array[i], value);
}
}
TEST(JniArray, LongConversions) {
const int64_t kLongs[] = {0, 1, -1, std::numeric_limits<int64_t>::min(),
std::numeric_limits<int64_t>::max()};
const size_t kLen = arraysize(kLongs);
JNIEnv* env = AttachCurrentThread();
CheckLongConversion(env, kLongs, kLen, ToJavaLongArray(env, kLongs, kLen));
const std::vector<int64_t> vec(kLongs, kLongs + kLen);
CheckLongConversion(env, kLongs, kLen, ToJavaLongArray(env, vec));
}
void CheckIntArrayConversion(JNIEnv* env,
ScopedJavaLocalRef<jintArray> jints,
std::vector<int> int_vector,
const size_t len) {
jint value;
for (size_t i = 0; i < len; ++i) {
env->GetIntArrayRegion(jints.obj(), i, 1, &value);
ASSERT_EQ(int_vector[i], value);
}
}
void CheckBoolArrayConversion(JNIEnv* env,
ScopedJavaLocalRef<jbooleanArray> jbooleans,
std::vector<bool> bool_vector,
const size_t len) {
jboolean value;
for (size_t i = 0; i < len; ++i) {
env->GetBooleanArrayRegion(jbooleans.obj(), i, 1, &value);
ASSERT_EQ(bool_vector[i], value);
}
}
void CheckFloatConversion(
JNIEnv* env,
const float* float_array,
const size_t len,
const ScopedJavaLocalRef<jfloatArray>& floats) {
ASSERT_TRUE(floats.obj());
jsize java_array_len = env->GetArrayLength(floats.obj());
ASSERT_EQ(static_cast<jsize>(len), java_array_len);
jfloat value;
for (size_t i = 0; i < len; ++i) {
env->GetFloatArrayRegion(floats.obj(), i, 1, &value);
ASSERT_EQ(float_array[i], value);
}
}
TEST(JniArray, FloatConversions) {
const float kFloats[] = { 0.0f, 1.0f, -10.0f};
const size_t kLen = arraysize(kFloats);
JNIEnv* env = AttachCurrentThread();
CheckFloatConversion(env, kFloats, kLen,
ToJavaFloatArray(env, kFloats, kLen));
const std::vector<float> vec(kFloats, kFloats + kLen);
CheckFloatConversion(env, kFloats, kLen, ToJavaFloatArray(env, vec));
}
TEST(JniArray, JavaBooleanArrayToBoolVector) {
const bool kBools[] = {false, true, false};
const size_t kLen = arraysize(kBools);
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jbooleanArray> jbooleans(env, env->NewBooleanArray(kLen));
ASSERT_TRUE(jbooleans.obj());
for (size_t i = 0; i < kLen; ++i) {
jboolean j = static_cast<jboolean>(kBools[i]);
env->SetBooleanArrayRegion(jbooleans.obj(), i, 1, &j);
ASSERT_FALSE(HasException(env));
}
std::vector<bool> bools;
JavaBooleanArrayToBoolVector(env, jbooleans.obj(), &bools);
ASSERT_EQ(static_cast<jsize>(bools.size()),
env->GetArrayLength(jbooleans.obj()));
CheckBoolArrayConversion(env, jbooleans, bools, kLen);
}
TEST(JniArray, JavaIntArrayToIntVector) {
const int kInts[] = {0, 1, -1};
const size_t kLen = arraysize(kInts);
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jintArray> jints(env, env->NewIntArray(kLen));
ASSERT_TRUE(jints.obj());
for (size_t i = 0; i < kLen; ++i) {
jint j = static_cast<jint>(kInts[i]);
env->SetIntArrayRegion(jints.obj(), i, 1, &j);
ASSERT_FALSE(HasException(env));
}
std::vector<int> ints;
JavaIntArrayToIntVector(env, jints.obj(), &ints);
ASSERT_EQ(static_cast<jsize>(ints.size()), env->GetArrayLength(jints.obj()));
CheckIntArrayConversion(env, jints, ints, kLen);
}
TEST(JniArray, JavaLongArrayToInt64Vector) {
const int64_t kInt64s[] = {0LL, 1LL, -1LL};
const size_t kLen = arraysize(kInt64s);
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jlongArray> jlongs(env, env->NewLongArray(kLen));
ASSERT_TRUE(jlongs.obj());
for (size_t i = 0; i < kLen; ++i) {
jlong j = static_cast<jlong>(kInt64s[i]);
env->SetLongArrayRegion(jlongs.obj(), i, 1, &j);
ASSERT_FALSE(HasException(env));
}
std::vector<int64_t> int64s;
JavaLongArrayToInt64Vector(env, jlongs.obj(), &int64s);
ASSERT_EQ(static_cast<jsize>(int64s.size()),
env->GetArrayLength(jlongs.obj()));
jlong value;
for (size_t i = 0; i < kLen; ++i) {
env->GetLongArrayRegion(jlongs.obj(), i, 1, &value);
ASSERT_EQ(int64s[i], value);
ASSERT_EQ(kInt64s[i], int64s[i]);
}
}
TEST(JniArray, JavaLongArrayToLongVector) {
const int64_t kInt64s[] = {0LL, 1LL, -1LL};
const size_t kLen = arraysize(kInt64s);
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jlongArray> jlongs(env, env->NewLongArray(kLen));
ASSERT_TRUE(jlongs.obj());
for (size_t i = 0; i < kLen; ++i) {
jlong j = static_cast<jlong>(kInt64s[i]);
env->SetLongArrayRegion(jlongs.obj(), i, 1, &j);
ASSERT_FALSE(HasException(env));
}
std::vector<jlong> jlongs_vector;
JavaLongArrayToLongVector(env, jlongs.obj(), &jlongs_vector);
ASSERT_EQ(static_cast<jsize>(jlongs_vector.size()),
env->GetArrayLength(jlongs.obj()));
jlong value;
for (size_t i = 0; i < kLen; ++i) {
env->GetLongArrayRegion(jlongs.obj(), i, 1, &value);
ASSERT_EQ(jlongs_vector[i], value);
}
}
TEST(JniArray, JavaFloatArrayToFloatVector) {
const float kFloats[] = {0.0, 0.5, -0.5};
const size_t kLen = arraysize(kFloats);
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jfloatArray> jfloats(env, env->NewFloatArray(kLen));
ASSERT_TRUE(jfloats.obj());
for (size_t i = 0; i < kLen; ++i) {
jfloat j = static_cast<jfloat>(kFloats[i]);
env->SetFloatArrayRegion(jfloats.obj(), i, 1, &j);
ASSERT_FALSE(HasException(env));
}
std::vector<float> floats;
JavaFloatArrayToFloatVector(env, jfloats.obj(), &floats);
ASSERT_EQ(static_cast<jsize>(floats.size()),
env->GetArrayLength(jfloats.obj()));
jfloat value;
for (size_t i = 0; i < kLen; ++i) {
env->GetFloatArrayRegion(jfloats.obj(), i, 1, &value);
ASSERT_EQ(floats[i], value);
}
}
TEST(JniArray, JavaArrayOfByteArrayToStringVector) {
const int kMaxItems = 50;
JNIEnv* env = AttachCurrentThread();
// Create a byte[][] object.
ScopedJavaLocalRef<jclass> byte_array_clazz(env, env->FindClass("[B"));
ASSERT_TRUE(byte_array_clazz.obj());
ScopedJavaLocalRef<jobjectArray> array(
env, env->NewObjectArray(kMaxItems, byte_array_clazz.obj(), NULL));
ASSERT_TRUE(array.obj());
// Create kMaxItems byte buffers.
char text[16];
for (int i = 0; i < kMaxItems; ++i) {
snprintf(text, sizeof text, "%d", i);
ScopedJavaLocalRef<jbyteArray> byte_array =
ToJavaByteArray(env, reinterpret_cast<uint8_t*>(text),
static_cast<size_t>(strlen(text)));
ASSERT_TRUE(byte_array.obj());
env->SetObjectArrayElement(array.obj(), i, byte_array.obj());
ASSERT_FALSE(HasException(env));
}
// Convert to std::vector<std::string>, check the content.
std::vector<std::string> vec;
JavaArrayOfByteArrayToStringVector(env, array.obj(), &vec);
EXPECT_EQ(static_cast<size_t>(kMaxItems), vec.size());
for (int i = 0; i < kMaxItems; ++i) {
snprintf(text, sizeof text, "%d", i);
EXPECT_STREQ(text, vec[i].c_str());
}
}
TEST(JniArray, JavaArrayOfIntArrayToIntVector) {
const size_t kNumItems = 4;
JNIEnv* env = AttachCurrentThread();
// Create an int[][] object.
ScopedJavaLocalRef<jclass> int_array_clazz(env, env->FindClass("[I"));
ASSERT_TRUE(int_array_clazz.obj());
ScopedJavaLocalRef<jobjectArray> array(
env, env->NewObjectArray(kNumItems, int_array_clazz.obj(), nullptr));
ASSERT_TRUE(array.obj());
// Populate int[][] object.
const int kInts0[] = {0, 1, -1, std::numeric_limits<int32_t>::min(),
std::numeric_limits<int32_t>::max()};
const size_t kLen0 = arraysize(kInts0);
ScopedJavaLocalRef<jintArray> int_array0 = ToJavaIntArray(env, kInts0, kLen0);
env->SetObjectArrayElement(array.obj(), 0, int_array0.obj());
const int kInts1[] = {3, 4, 5};
const size_t kLen1 = arraysize(kInts1);
ScopedJavaLocalRef<jintArray> int_array1 = ToJavaIntArray(env, kInts1, kLen1);
env->SetObjectArrayElement(array.obj(), 1, int_array1.obj());
const int kInts2[] = {};
const size_t kLen2 = 0;
ScopedJavaLocalRef<jintArray> int_array2 = ToJavaIntArray(env, kInts2, kLen2);
env->SetObjectArrayElement(array.obj(), 2, int_array2.obj());
const int kInts3[] = {16};
const size_t kLen3 = arraysize(kInts3);
ScopedJavaLocalRef<jintArray> int_array3 = ToJavaIntArray(env, kInts3, kLen3);
env->SetObjectArrayElement(array.obj(), 3, int_array3.obj());
// Convert to std::vector<std::vector<int>>, check the content.
std::vector<std::vector<int>> out;
JavaArrayOfIntArrayToIntVector(env, array.obj(), &out);
EXPECT_EQ(kNumItems, out.size());
CheckIntArrayConversion(env, int_array0, out[0], kLen0);
CheckIntArrayConversion(env, int_array1, out[1], kLen1);
CheckIntArrayConversion(env, int_array2, out[2], kLen2);
CheckIntArrayConversion(env, int_array3, out[3], kLen3);
}
} // namespace android
} // namespace base