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/*
* Copyright (C) 2017 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 "text/Utf8Iterator.h"
#include "test/Test.h"
using ::android::StringPiece;
using ::testing::Eq;
namespace aapt {
namespace text {
TEST(Utf8IteratorTest, IteratesOverAscii) {
Utf8Iterator iter("hello");
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'h'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'e'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'l'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'l'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'o'));
EXPECT_FALSE(iter.HasNext());
}
TEST(Utf8IteratorTest, IteratesOverUnicode) {
Utf8Iterator iter("Hi there 華勵蓮🍩");
iter.Skip(9);
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'華'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'勵'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'蓮'));
ASSERT_TRUE(iter.HasNext());
EXPECT_THAT(iter.Next(), Eq(U'🍩'));
EXPECT_FALSE(iter.HasNext());
}
TEST(Utf8IteratorTest, PositionPointsToTheCorrectPlace) {
const StringPiece expected("Mm🍩");
Utf8Iterator iter(expected);
// Before any character, the position should be 0.
EXPECT_THAT(iter.Position(), Eq(0u));
// The 'M' character, one byte.
ASSERT_TRUE(iter.HasNext());
iter.Next();
EXPECT_THAT(iter.Position(), Eq(1u));
// The 'm' character, one byte.
ASSERT_TRUE(iter.HasNext());
iter.Next();
EXPECT_THAT(iter.Position(), Eq(2u));
// The doughnut character, 4 bytes.
ASSERT_TRUE(iter.HasNext());
iter.Next();
EXPECT_THAT(iter.Position(), Eq(6u));
// There should be nothing left.
EXPECT_FALSE(iter.HasNext());
EXPECT_THAT(iter.Position(), Eq(expected.size()));
}
} // namespace text
} // namespace aapt
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