clang-tools-extra/clangd/unittests/tweaks/ExpandMacroTests.cpp

   1 //===-- ExpandMacroTests.cpp ------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "TweakTesting.h"
  10 #include "gmock/gmock.h"
  11 #include "gtest/gtest.h"
  12
  13 namespace clang {
  14 namespace clangd {
  15 namespace {
  16
  17 TWEAK_TEST(ExpandMacro);
  18
  19 TEST_F(ExpandMacroTest, Test) {
  20   Header = R"cpp(
  21     // error-ok: not real c++, just token manipulation
  22     #define FOO 1 2 3
  23     #define FUNC(X) X+X+X
  24     #define EMPTY
  25     #define EMPTY_FN(X)
  26   )cpp";
  27
  28   // Available on macro names, not available anywhere else.
  29   EXPECT_AVAILABLE("^F^O^O^ BAR ^F^O^O^");
  30   EXPECT_AVAILABLE("^F^U^N^C^(1)");
  31   EXPECT_UNAVAILABLE("^#^d^efine^ ^XY^Z 1 ^2 ^3^");
  32   EXPECT_UNAVAILABLE("FOO ^B^A^R^ FOO ^");
  33   EXPECT_UNAVAILABLE("FUNC(^1^)^");
  34
  35   // Works as expected on object-like macros.
  36   EXPECT_EQ(apply("^FOO BAR FOO"), "1 2 3 BAR FOO");
  37   EXPECT_EQ(apply("FOO BAR ^FOO"), "FOO BAR 1 2 3");
  38   // And function-like macros.
  39   EXPECT_EQ(apply("F^UNC(2)"), "2 + 2 + 2");
  40
  41   // Works on empty macros.
  42   EXPECT_EQ(apply("int a ^EMPTY;"), "int a ;");
  43   EXPECT_EQ(apply("int a ^EMPTY_FN(1 2 3);"), "int a ;");
  44   EXPECT_EQ(apply("int a = 123 ^EMPTY EMPTY_FN(1);"),
  45             "int a = 123  EMPTY_FN(1);");
  46   EXPECT_EQ(apply("int a = 123 ^EMPTY_FN(1) EMPTY;"), "int a = 123  EMPTY;");
  47   EXPECT_EQ(apply("int a = 123 EMPTY_FN(1) ^EMPTY;"),
  48             "int a = 123 EMPTY_FN(1) ;");
  49 }
  50
  51 } // namespace
  52 } // namespace clangd
  53 } // namespace clang