1 // Copyright 2019 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include <cstring>
16
17 #include "pw_status/status.h"
18 #include "pw_string/string_builder.h"
19 #include "pw_unit_test/framework.h"
20
21 namespace pw {
22
23 /// A type which compares equal to itself and FAILs if stringified.
24 struct ExplodingString {
25 friend bool operator==(const ExplodingString&, const ExplodingString&);
26 };
27
operator ==(const ExplodingString &,const ExplodingString &)28 bool operator==(const ExplodingString&, const ExplodingString&) { return true; }
29
30 template <>
ToString(const ExplodingString &,span<char>)31 inline StatusWithSize ToString(const ExplodingString&, span<char>) {
32 ADD_FAILURE();
33 return StatusWithSize::Unimplemented();
34 }
35
36 namespace {
37
TEST(UnknownTypeToString,SmallObject)38 TEST(UnknownTypeToString, SmallObject) {
39 struct {
40 char a = 0xa1;
41 } object;
42
43 StringBuffer<64> expected;
44 expected << "<1-byte object at 0x" << &object << '>';
45 ASSERT_EQ(OkStatus(), expected.status());
46
47 StringBuffer<64> actual;
48 actual << object;
49 ASSERT_EQ(OkStatus(), actual.status());
50 EXPECT_STREQ(expected.c_str(), actual.c_str());
51 }
52
TEST(UnknownTypeToString,NineByteObject)53 TEST(UnknownTypeToString, NineByteObject) {
54 struct {
55 char a[9] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
56 } object;
57
58 StringBuffer<64> expected;
59 expected << "<9-byte object at 0x" << &object << '>';
60 ASSERT_EQ(OkStatus(), expected.status());
61
62 StringBuffer<64> actual;
63 actual << object;
64 ASSERT_EQ(OkStatus(), actual.status());
65 EXPECT_STREQ(expected.c_str(), actual.c_str());
66 }
67
TEST(UnknownTypeToString,TenByteObject)68 TEST(UnknownTypeToString, TenByteObject) {
69 struct {
70 char a[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
71 } object;
72
73 StringBuffer<72> expected;
74 expected << "<10-byte object at 0x" << &object << '>';
75 ASSERT_EQ(OkStatus(), expected.status());
76
77 StringBuffer<72> actual;
78 actual << object;
79 ASSERT_EQ(OkStatus(), actual.status());
80 EXPECT_STREQ(expected.c_str(), actual.c_str());
81 }
82
TEST(ExpectEq,ObjectsAreNotStringifiedUnlessExpectationFails)83 TEST(ExpectEq, ObjectsAreNotStringifiedUnlessExpectationFails) {
84 EXPECT_EQ(ExplodingString{}, ExplodingString{});
85 }
86
87 } // namespace
88 } // namespace pw
89