1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "text/Utf8Iterator.h"
18
19#include "test/Test.h"
20
21using ::android::StringPiece;
22using ::testing::Eq;
23
24namespace aapt {
25namespace text {
26
27TEST(Utf8IteratorTest, IteratesOverAscii) {
28  Utf8Iterator iter("hello");
29
30  ASSERT_TRUE(iter.HasNext());
31  EXPECT_THAT(iter.Next(), Eq(U'h'));
32
33  ASSERT_TRUE(iter.HasNext());
34  EXPECT_THAT(iter.Next(), Eq(U'e'));
35
36  ASSERT_TRUE(iter.HasNext());
37  EXPECT_THAT(iter.Next(), Eq(U'l'));
38
39  ASSERT_TRUE(iter.HasNext());
40  EXPECT_THAT(iter.Next(), Eq(U'l'));
41
42  ASSERT_TRUE(iter.HasNext());
43  EXPECT_THAT(iter.Next(), Eq(U'o'));
44
45  EXPECT_FALSE(iter.HasNext());
46}
47
48TEST(Utf8IteratorTest, IteratesOverUnicode) {
49  Utf8Iterator iter("Hi there 華勵蓮��");
50  iter.Skip(9);
51
52  ASSERT_TRUE(iter.HasNext());
53  EXPECT_THAT(iter.Next(), Eq(U'華'));
54
55  ASSERT_TRUE(iter.HasNext());
56  EXPECT_THAT(iter.Next(), Eq(U'勵'));
57
58  ASSERT_TRUE(iter.HasNext());
59  EXPECT_THAT(iter.Next(), Eq(U'蓮'));
60
61  ASSERT_TRUE(iter.HasNext());
62  EXPECT_THAT(iter.Next(), Eq(U'��'));
63
64  EXPECT_FALSE(iter.HasNext());
65}
66
67TEST(Utf8IteratorTest, PositionPointsToTheCorrectPlace) {
68  const StringPiece expected("Mm��");
69  Utf8Iterator iter(expected);
70
71  // Before any character, the position should be 0.
72  EXPECT_THAT(iter.Position(), Eq(0u));
73
74  // The 'M' character, one byte.
75  ASSERT_TRUE(iter.HasNext());
76  iter.Next();
77  EXPECT_THAT(iter.Position(), Eq(1u));
78
79  // The 'm' character, one byte.
80  ASSERT_TRUE(iter.HasNext());
81  iter.Next();
82  EXPECT_THAT(iter.Position(), Eq(2u));
83
84  // The doughnut character, 4 bytes.
85  ASSERT_TRUE(iter.HasNext());
86  iter.Next();
87  EXPECT_THAT(iter.Position(), Eq(6u));
88
89  // There should be nothing left.
90  EXPECT_FALSE(iter.HasNext());
91  EXPECT_THAT(iter.Position(), Eq(expected.size()));
92}
93
94}  // namespace text
95}  // namespace aapt
96