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// Copyright (c) 2011 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_android.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace android {
namespace {
const char kJavaLangObject[] = "java/lang/Object";
const char kGetClass[] = "getClass";
const char kToString[] = "toString";
const char kReturningJavaLangClass[] = "()Ljava/lang/Class;";
const char kReturningJavaLangString[] = "()Ljava/lang/String;";
const char* g_last_method;
const char* g_last_jni_signature;
jmethodID g_last_method_id;
JNINativeInterface g_previous_functions = {0};
jmethodID GetMethodIDWrapper(JNIEnv* env, jclass clazz, const char* method,
const char* jni_signature) {
g_last_method = method;
g_last_jni_signature = jni_signature;
g_last_method_id = g_previous_functions.GetMethodID(env, clazz, method,
jni_signature);
return g_last_method_id;
}
} // namespace
class JNIAndroidTest : public testing::Test {
protected:
virtual void SetUp() {
JNIEnv* env = AttachCurrentThread();
g_previous_functions = *env->functions;
JNINativeInterface* native_interface =
const_cast<JNINativeInterface*>(env->functions);
native_interface->GetMethodID = &GetMethodIDWrapper;
}
virtual void TearDown() {
JNIEnv* env = AttachCurrentThread();
*(const_cast<JNINativeInterface*>(env->functions)) = g_previous_functions;
}
void Reset() {
g_last_method = 0;
g_last_jni_signature = 0;
g_last_method_id = NULL;
}
};
TEST_F(JNIAndroidTest, GetMethodIDFromClassNameCaching) {
JNIEnv* env = AttachCurrentThread();
Reset();
jmethodID id1 = GetMethodIDFromClassName(env, kJavaLangObject, kGetClass,
kReturningJavaLangClass);
EXPECT_STREQ(kGetClass, g_last_method);
EXPECT_STREQ(kReturningJavaLangClass, g_last_jni_signature);
EXPECT_EQ(g_last_method_id, id1);
Reset();
jmethodID id2 = GetMethodIDFromClassName(env, kJavaLangObject, kGetClass,
kReturningJavaLangClass);
EXPECT_STREQ(0, g_last_method);
EXPECT_STREQ(0, g_last_jni_signature);
EXPECT_EQ(NULL, g_last_method_id);
EXPECT_EQ(id1, id2);
Reset();
jmethodID id3 = GetMethodIDFromClassName(env, kJavaLangObject, kToString,
kReturningJavaLangString);
EXPECT_STREQ(kToString, g_last_method);
EXPECT_STREQ(kReturningJavaLangString, g_last_jni_signature);
EXPECT_EQ(g_last_method_id, id3);
}
} // namespace android
} // namespace base
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