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gmock-pp-string_test.cc
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Tue, Nov 19, 12:27

gmock-pp-string_test.cc
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// Copyright 2018, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Google Mock - a framework for writing C++ mock classes.
//
// This file tests the internal preprocessor macro library.
#include "gmock/internal/gmock-pp.h"
#include <string>
#include "gmock/gmock.h"
namespace testing {
namespace {
// Matcher to verify that to strings are identical up to whitespace
// Not 100% correct, because it treats "AB" as equal to "A B".
::testing::Matcher<const std::string&> SameExceptSpaces(const std::string& s) {
auto remove_spaces = [](std::string to_split) {
to_split.erase(std::remove(to_split.begin(), to_split.end(), ' '),
to_split.end());
return to_split;
};
return ::testing::ResultOf(remove_spaces, remove_spaces(s));
}
// Verify that a macro expands to a given text. Ignores whitespace difference.
// In MSVC, GMOCK_PP_STRINGIZE() returns nothing, rather than "". So concatenate
// with an empty string.
#define EXPECT_EXPANSION(Result, Macro) \
EXPECT_THAT("" GMOCK_PP_STRINGIZE(Macro), SameExceptSpaces(Result))
TEST(Macros, Cat) {
EXPECT_EXPANSION("14", GMOCK_PP_CAT(1, 4));
EXPECT_EXPANSION("+=", GMOCK_PP_CAT(+, =));
}
TEST(Macros, Narg) {
EXPECT_EXPANSION("1", GMOCK_PP_NARG());
EXPECT_EXPANSION("1", GMOCK_PP_NARG(x));
EXPECT_EXPANSION("2", GMOCK_PP_NARG(x, y));
EXPECT_EXPANSION("3", GMOCK_PP_NARG(x, y, z));
EXPECT_EXPANSION("4", GMOCK_PP_NARG(x, y, z, w));
EXPECT_EXPANSION("0", GMOCK_PP_NARG0());
EXPECT_EXPANSION("1", GMOCK_PP_NARG0(x));
EXPECT_EXPANSION("2", GMOCK_PP_NARG0(x, y));
}
TEST(Macros, Comma) {
EXPECT_EXPANSION("0", GMOCK_PP_HAS_COMMA());
EXPECT_EXPANSION("1", GMOCK_PP_HAS_COMMA(, ));
EXPECT_EXPANSION("0", GMOCK_PP_HAS_COMMA((, )));
}
TEST(Macros, IsEmpty) {
EXPECT_EXPANSION("1", GMOCK_PP_IS_EMPTY());
EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(, ));
EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(a));
EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(()));
#define GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1
EXPECT_EXPANSION("1", GMOCK_PP_IS_EMPTY(GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1));
}
TEST(Macros, If) {
EXPECT_EXPANSION("1", GMOCK_PP_IF(1, 1, 2));
EXPECT_EXPANSION("2", GMOCK_PP_IF(0, 1, 2));
}
TEST(Macros, HeadTail) {
EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1));
EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1, 2));
EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1, 2, 3));
EXPECT_EXPANSION("", GMOCK_PP_TAIL(1));
EXPECT_EXPANSION("2", GMOCK_PP_TAIL(1, 2));
EXPECT_EXPANSION("2", GMOCK_PP_HEAD(GMOCK_PP_TAIL(1, 2, 3)));
}
TEST(Macros, Parentheses) {
EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss));
EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss()));
EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss() sss));
EXPECT_EXPANSION("1", GMOCK_PP_IS_BEGIN_PARENS((sss)));
EXPECT_EXPANSION("1", GMOCK_PP_IS_BEGIN_PARENS((sss)ss));
EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss));
EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss()));
EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss() sss));
EXPECT_EXPANSION("1", GMOCK_PP_IS_ENCLOSED_PARENS((sss)));
EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS((sss)ss));
EXPECT_EXPANSION("1 + 1", GMOCK_PP_REMOVE_PARENS((1 + 1)));
}
TEST(Macros, Increment) {
EXPECT_EXPANSION("1", GMOCK_PP_INC(0));
EXPECT_EXPANSION("2", GMOCK_PP_INC(1));
EXPECT_EXPANSION("3", GMOCK_PP_INC(2));
EXPECT_EXPANSION("4", GMOCK_PP_INC(3));
EXPECT_EXPANSION("5", GMOCK_PP_INC(4));
EXPECT_EXPANSION("16", GMOCK_PP_INC(15));
}
#define JOINER_CAT(a, b) a##b
#define JOINER(_N, _Data, _Elem) JOINER_CAT(_Data, _N) = _Elem
TEST(Macros, Repeat) {
EXPECT_EXPANSION("", GMOCK_PP_REPEAT(JOINER, X, 0));
EXPECT_EXPANSION("X0=", GMOCK_PP_REPEAT(JOINER, X, 1));
EXPECT_EXPANSION("X0= X1=", GMOCK_PP_REPEAT(JOINER, X, 2));
EXPECT_EXPANSION("X0= X1= X2=", GMOCK_PP_REPEAT(JOINER, X, 3));
EXPECT_EXPANSION("X0= X1= X2= X3=", GMOCK_PP_REPEAT(JOINER, X, 4));
EXPECT_EXPANSION("X0= X1= X2= X3= X4=", GMOCK_PP_REPEAT(JOINER, X, 5));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5=", GMOCK_PP_REPEAT(JOINER, X, 6));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6=",
GMOCK_PP_REPEAT(JOINER, X, 7));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7=",
GMOCK_PP_REPEAT(JOINER, X, 8));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8=",
GMOCK_PP_REPEAT(JOINER, X, 9));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9=",
GMOCK_PP_REPEAT(JOINER, X, 10));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10=",
GMOCK_PP_REPEAT(JOINER, X, 11));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11=",
GMOCK_PP_REPEAT(JOINER, X, 12));
EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12=",
GMOCK_PP_REPEAT(JOINER, X, 13));
EXPECT_EXPANSION(
"X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12= X13=",
GMOCK_PP_REPEAT(JOINER, X, 14));
EXPECT_EXPANSION(
"X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12= X13= X14=",
GMOCK_PP_REPEAT(JOINER, X, 15));
}
TEST(Macros, ForEach) {
EXPECT_EXPANSION("", GMOCK_PP_FOR_EACH(JOINER, X, ()));
EXPECT_EXPANSION("X0=a", GMOCK_PP_FOR_EACH(JOINER, X, (a)));
EXPECT_EXPANSION("X0=a X1=b", GMOCK_PP_FOR_EACH(JOINER, X, (a, b)));
EXPECT_EXPANSION("X0=a X1=b X2=c", GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c)));
EXPECT_EXPANSION("X0=a X1=b X2=c X3=d",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d)));
EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e)));
EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f)));
EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g)));
EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h)));
EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i)));
EXPECT_EXPANSION(
"X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j)));
EXPECT_EXPANSION(
"X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k)));
EXPECT_EXPANSION(
"X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l)));
EXPECT_EXPANSION(
"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",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l, m)));
EXPECT_EXPANSION(
"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 "
"X13=n",
GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l, m, n)));
EXPECT_EXPANSION(
"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 "
"X13=n X14=o",
GMOCK_PP_FOR_EACH(JOINER, X,
(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o)));
}
} // namespace
} // namespace testing

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