Reland "libutils: Introduce StaticString16""

This reverts commit 1270e4fbf17402fb01dbfa7928a654d41d8553ee.

Bug: 138856262
Test: Run unit tests.
Change-Id: I37be01d7d4f98a83078870cb0917275336fa2bbd
Merged-In: I8da93f2c9b95183e32d4a2ea895f90c449abbe4d

1 files changed, 218 insertions, 0 deletions

diff --git a/libutils/String16_test.cpp b/libutils/String16_test.cpp
new file mode 100644
index 000000000..f1f24c394
--- /dev/null
+++ b/libutils/String16_test.cpp
@@ -0,0 +1,218 @@
+/*
+ * Copyright (C) 2019 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 <utils/String16.h>
+#include <utils/String8.h>
+
+#include <gtest/gtest.h>
+
+namespace android {
+
+::testing::AssertionResult Char16_tStringEquals(const char16_t* a, const char16_t* b) {
+    if (strcmp16(a, b) != 0) {
+        return ::testing::AssertionFailure()
+               << "\"" << String8(a).c_str() << "\" not equal to \"" << String8(b).c_str() << "\"";
+    }
+    return ::testing::AssertionSuccess();
+}
+
+#define EXPECT_STR16EQ(a, b) EXPECT_TRUE(Char16_tStringEquals(a, b))
+
+TEST(String16Test, FromChar16_t) {
+    String16 tmp(u"Verify me");
+    EXPECT_STR16EQ(u"Verify me", tmp);
+}
+
+TEST(String16Test, FromChar16_tSized) {
+    String16 tmp(u"Verify me", 7);
+    EXPECT_STR16EQ(u"Verify ", tmp);
+}
+
+TEST(String16Test, FromChar) {
+    String16 tmp("Verify me");
+    EXPECT_STR16EQ(u"Verify me", tmp);
+}
+
+TEST(String16Test, FromCharSized) {
+    String16 tmp("Verify me", 7);
+    EXPECT_STR16EQ(u"Verify ", tmp);
+}
+
+TEST(String16Test, Copy) {
+    String16 tmp("Verify me");
+    String16 another = tmp;
+    EXPECT_STR16EQ(u"Verify me", tmp);
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, Move) {
+    String16 tmp("Verify me");
+    String16 another(std::move(tmp));
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, Size) {
+    String16 tmp("Verify me");
+    EXPECT_EQ(9U, tmp.size());
+}
+
+TEST(String16Test, setTo) {
+    String16 tmp("Verify me");
+    tmp.setTo(u"New content");
+    EXPECT_EQ(11U, tmp.size());
+    EXPECT_STR16EQ(u"New content", tmp);
+}
+
+TEST(String16Test, Append) {
+    String16 tmp("Verify me");
+    tmp.append(String16("Hello"));
+    EXPECT_EQ(14U, tmp.size());
+    EXPECT_STR16EQ(u"Verify meHello", tmp);
+}
+
+TEST(String16Test, Insert) {
+    String16 tmp("Verify me");
+    tmp.insert(6, u"Insert");
+    EXPECT_EQ(15U, tmp.size());
+    EXPECT_STR16EQ(u"VerifyInsert me", tmp);
+}
+
+TEST(String16Test, Remove) {
+    String16 tmp("Verify me");
+    tmp.remove(2, 6);
+    EXPECT_EQ(2U, tmp.size());
+    EXPECT_STR16EQ(u" m", tmp);
+}
+
+TEST(String16Test, MakeLower) {
+    String16 tmp("Verify Me!");
+    tmp.makeLower();
+    EXPECT_EQ(10U, tmp.size());
+    EXPECT_STR16EQ(u"verify me!", tmp);
+}
+
+TEST(String16Test, ReplaceAll) {
+    String16 tmp("Verify verify Verify");
+    tmp.replaceAll(u'r', u'!');
+    EXPECT_STR16EQ(u"Ve!ify ve!ify Ve!ify", tmp);
+}
+
+TEST(String16Test, Compare) {
+    String16 tmp("Verify me");
+    EXPECT_EQ(String16(u"Verify me"), tmp);
+}
+
+TEST(String16Test, StaticString) {
+    String16 nonStaticString("NonStatic");
+    StaticString16 staticString(u"Static");
+
+    EXPECT_TRUE(staticString.isStaticString());
+    EXPECT_FALSE(nonStaticString.isStaticString());
+}
+
+TEST(String16Test, StaticStringCopy) {
+    StaticString16 tmp(u"Verify me");
+    String16 another = tmp;
+    EXPECT_STR16EQ(u"Verify me", tmp);
+    EXPECT_STR16EQ(u"Verify me", another);
+    EXPECT_TRUE(tmp.isStaticString());
+    EXPECT_TRUE(another.isStaticString());
+}
+
+TEST(String16Test, StaticStringMove) {
+    StaticString16 tmp(u"Verify me");
+    String16 another(std::move(tmp));
+    EXPECT_STR16EQ(u"Verify me", another);
+    EXPECT_TRUE(another.isStaticString());
+}
+
+TEST(String16Test, StaticStringSize) {
+    StaticString16 tmp(u"Verify me");
+    EXPECT_EQ(9U, tmp.size());
+}
+
+TEST(String16Test, StaticStringSetTo) {
+    StaticString16 tmp(u"Verify me");
+    tmp.setTo(u"New content");
+    EXPECT_EQ(11U, tmp.size());
+    EXPECT_STR16EQ(u"New content", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringAppend) {
+    StaticString16 tmp(u"Verify me");
+    tmp.append(String16("Hello"));
+    EXPECT_EQ(14U, tmp.size());
+    EXPECT_STR16EQ(u"Verify meHello", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringInsert) {
+    StaticString16 tmp(u"Verify me");
+    tmp.insert(6, u"Insert");
+    EXPECT_EQ(15U, tmp.size());
+    EXPECT_STR16EQ(u"VerifyInsert me", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringRemove) {
+    StaticString16 tmp(u"Verify me");
+    tmp.remove(2, 6);
+    EXPECT_EQ(2U, tmp.size());
+    EXPECT_STR16EQ(u" m", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringMakeLower) {
+    StaticString16 tmp(u"Verify me!");
+    tmp.makeLower();
+    EXPECT_EQ(10U, tmp.size());
+    EXPECT_STR16EQ(u"verify me!", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringReplaceAll) {
+    StaticString16 tmp(u"Verify verify Verify");
+    tmp.replaceAll(u'r', u'!');
+    EXPECT_STR16EQ(u"Ve!ify ve!ify Ve!ify", tmp);
+    EXPECT_FALSE(tmp.isStaticString());
+}
+
+TEST(String16Test, StaticStringCompare) {
+    StaticString16 tmp(u"Verify me");
+    EXPECT_EQ(String16(u"Verify me"), tmp);
+}
+
+TEST(String16Test, StringSetToStaticString) {
+    StaticString16 tmp(u"Verify me");
+    String16 another(u"nonstatic");
+    another = tmp;
+    EXPECT_STR16EQ(u"Verify me", tmp);
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, StringMoveFromStaticString) {
+    StaticString16 tmp(u"Verify me");
+    String16 another(std::move(tmp));
+    EXPECT_STR16EQ(u"Verify me", another);
+}
+
+TEST(String16Test, EmptyStringIsStatic) {
+    String16 tmp("");
+    EXPECT_TRUE(tmp.isStaticString());
+}
+
+}  // namespace android