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29
30 // Google Mock - a framework for writing C++ mock classes.
31 //
32 // This file tests the internal preprocessor macro library.
33 #include <string>
34
35 #include "gmock/gmock.h"
36 #include "gmock/internal/gmock-pp.h"
37
38 namespace testing {
39 namespace {
40
41 // Matcher to verify that to strings are identical up to whitespace
42 // Not 100% correct, because it treats "AB" as equal to "A B".
SameExceptSpaces(const std::string & s)43 ::testing::Matcher<const std::string&> SameExceptSpaces(const std::string& s) {
44 auto remove_spaces = [](std::string to_split) {
45 to_split.erase(std::remove(to_split.begin(), to_split.end(), ' '),
46 to_split.end());
47 return to_split;
48 };
49 return ::testing::ResultOf(remove_spaces, remove_spaces(s));
50 }
51
52 // Verify that a macro expands to a given text. Ignores whitespace difference.
53 // In MSVC, GMOCK_PP_STRINGIZE() returns nothing, rather than "". So concatenate
54 // with an empty string.
55 #define EXPECT_EXPANSION(Result, Macro) \
56 EXPECT_THAT("" GMOCK_PP_STRINGIZE(Macro), SameExceptSpaces(Result))
57
TEST(Macros,Cat)58 TEST(Macros, Cat) {
59 EXPECT_EXPANSION("14", GMOCK_PP_CAT(1, 4));
60 EXPECT_EXPANSION("+=", GMOCK_PP_CAT(+, =));
61 }
62
TEST(Macros,Narg)63 TEST(Macros, Narg) {
64 EXPECT_EXPANSION("1", GMOCK_PP_NARG());
65 EXPECT_EXPANSION("1", GMOCK_PP_NARG(x));
66 EXPECT_EXPANSION("2", GMOCK_PP_NARG(x, y));
67 EXPECT_EXPANSION("3", GMOCK_PP_NARG(x, y, z));
68 EXPECT_EXPANSION("4", GMOCK_PP_NARG(x, y, z, w));
69
70 EXPECT_EXPANSION("0", GMOCK_PP_NARG0());
71 EXPECT_EXPANSION("1", GMOCK_PP_NARG0(x));
72 EXPECT_EXPANSION("2", GMOCK_PP_NARG0(x, y));
73 }
74
TEST(Macros,Comma)75 TEST(Macros, Comma) {
76 EXPECT_EXPANSION("0", GMOCK_PP_HAS_COMMA());
77 EXPECT_EXPANSION("1", GMOCK_PP_HAS_COMMA(, ));
78 EXPECT_EXPANSION("0", GMOCK_PP_HAS_COMMA((, )));
79 }
80
TEST(Macros,IsEmpty)81 TEST(Macros, IsEmpty) {
82 EXPECT_EXPANSION("1", GMOCK_PP_IS_EMPTY());
83 EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(, ));
84 EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(a));
85 EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(()));
86
87 #define GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1
88 EXPECT_EXPANSION("1", GMOCK_PP_IS_EMPTY(GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1));
89 }
90
TEST(Macros,If)91 TEST(Macros, If) {
92 EXPECT_EXPANSION("1", GMOCK_PP_IF(1, 1, 2));
93 EXPECT_EXPANSION("2", GMOCK_PP_IF(0, 1, 2));
94 }
95
TEST(Macros,HeadTail)96 TEST(Macros, HeadTail) {
97 EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1));
98 EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1, 2));
99 EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1, 2, 3));
100
101 EXPECT_EXPANSION("", GMOCK_PP_TAIL(1));
102 EXPECT_EXPANSION("2", GMOCK_PP_TAIL(1, 2));
103 EXPECT_EXPANSION("2", GMOCK_PP_HEAD(GMOCK_PP_TAIL(1, 2, 3)));
104 }
105
TEST(Macros,Parentheses)106 TEST(Macros, Parentheses) {
107 EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss));
108 EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss()));
109 EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss() sss));
110 EXPECT_EXPANSION("1", GMOCK_PP_IS_BEGIN_PARENS((sss)));
111 EXPECT_EXPANSION("1", GMOCK_PP_IS_BEGIN_PARENS((sss)ss));
112
113 EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss));
114 EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss()));
115 EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss() sss));
116 EXPECT_EXPANSION("1", GMOCK_PP_IS_ENCLOSED_PARENS((sss)));
117 EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS((sss)ss));
118
119 EXPECT_EXPANSION("1 + 1", GMOCK_PP_REMOVE_PARENS((1 + 1)));
120 }
121
TEST(Macros,Increment)122 TEST(Macros, Increment) {
123 EXPECT_EXPANSION("1", GMOCK_PP_INC(0));
124 EXPECT_EXPANSION("2", GMOCK_PP_INC(1));
125 EXPECT_EXPANSION("3", GMOCK_PP_INC(2));
126 EXPECT_EXPANSION("4", GMOCK_PP_INC(3));
127 EXPECT_EXPANSION("5", GMOCK_PP_INC(4));
128
129 EXPECT_EXPANSION("16", GMOCK_PP_INC(15));
130 }
131
132 #define JOINER_CAT(a, b) a##b
133 #define JOINER(_N, _Data, _Elem) JOINER_CAT(_Data, _N) = _Elem
134
TEST(Macros,Repeat)135 TEST(Macros, Repeat) {
136 EXPECT_EXPANSION("", GMOCK_PP_REPEAT(JOINER, X, 0));
137 EXPECT_EXPANSION("X0=", GMOCK_PP_REPEAT(JOINER, X, 1));
138 EXPECT_EXPANSION("X0= X1=", GMOCK_PP_REPEAT(JOINER, X, 2));
139 EXPECT_EXPANSION("X0= X1= X2=", GMOCK_PP_REPEAT(JOINER, X, 3));
140 EXPECT_EXPANSION("X0= X1= X2= X3=", GMOCK_PP_REPEAT(JOINER, X, 4));
141 EXPECT_EXPANSION("X0= X1= X2= X3= X4=", GMOCK_PP_REPEAT(JOINER, X, 5));
142 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5=", GMOCK_PP_REPEAT(JOINER, X, 6));
143 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6=",
144 GMOCK_PP_REPEAT(JOINER, X, 7));
145 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7=",
146 GMOCK_PP_REPEAT(JOINER, X, 8));
147 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8=",
148 GMOCK_PP_REPEAT(JOINER, X, 9));
149 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9=",
150 GMOCK_PP_REPEAT(JOINER, X, 10));
151 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10=",
152 GMOCK_PP_REPEAT(JOINER, X, 11));
153 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11=",
154 GMOCK_PP_REPEAT(JOINER, X, 12));
155 EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12=",
156 GMOCK_PP_REPEAT(JOINER, X, 13));
157 EXPECT_EXPANSION(
158 "X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12= X13=",
159 GMOCK_PP_REPEAT(JOINER, X, 14));
160 EXPECT_EXPANSION(
161 "X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12= X13= X14=",
162 GMOCK_PP_REPEAT(JOINER, X, 15));
163 }
TEST(Macros,ForEach)164 TEST(Macros, ForEach) {
165 EXPECT_EXPANSION("", GMOCK_PP_FOR_EACH(JOINER, X, ()));
166 EXPECT_EXPANSION("X0=a", GMOCK_PP_FOR_EACH(JOINER, X, (a)));
167 EXPECT_EXPANSION("X0=a X1=b", GMOCK_PP_FOR_EACH(JOINER, X, (a, b)));
168 EXPECT_EXPANSION("X0=a X1=b X2=c", GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c)));
169 EXPECT_EXPANSION("X0=a X1=b X2=c X3=d",
170 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d)));
171 EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e",
172 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e)));
173 EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f",
174 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f)));
175 EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g",
176 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g)));
177 EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h",
178 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h)));
179 EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i",
180 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i)));
181 EXPECT_EXPANSION(
182 "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j",
183 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j)));
184 EXPECT_EXPANSION(
185 "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k",
186 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k)));
187 EXPECT_EXPANSION(
188 "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l",
189 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l)));
190 EXPECT_EXPANSION(
191 "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l X12=m",
192 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l, m)));
193 EXPECT_EXPANSION(
194 "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l X12=m "
195 "X13=n",
196 GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l, m, n)));
197 EXPECT_EXPANSION(
198 "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l X12=m "
199 "X13=n X14=o",
200 GMOCK_PP_FOR_EACH(JOINER, X,
201 (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o)));
202 }
203
204 } // namespace
205 } // namespace testing
206