Add unit testing for Lexer.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148478 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 121 insertions, 1 deletions

diff --git a/unittests/CMakeLists.txt b/unittests/CMakeLists.txt
index 4b662e46f4..e64fa1c722 100644
--- a/unittests/CMakeLists.txt
+++ b/unittests/CMakeLists.txt
@@ -56,6 +56,11 @@ add_clang_unittest(Basic
   USED_LIBS gtest gtest_main clangLex
  )
 
+add_clang_unittest(Lex
+  Lex/LexerTest.cpp
+  USED_LIBS gtest gtest_main clangLex
+ )
+
 add_clang_unittest(Frontend
   Frontend/FrontendActionTest.cpp
   USED_LIBS gtest gtest_main clangFrontend
diff --git a/unittests/Lex/LexerTest.cpp b/unittests/Lex/LexerTest.cpp
new file mode 100644
index 0000000000..17c9cf8cca
--- /dev/null
+++ b/unittests/Lex/LexerTest.cpp
@@ -0,0 +1,100 @@
+//===- unittests/Basic/LexerTest.cpp ------ Lexer tests -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/TargetOptions.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Lex/ModuleLoader.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/Preprocessor.h"
+#include "llvm/Config/config.h"
+
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace clang;
+
+namespace {
+
+// The test fixture.
+class LexerTest : public ::testing::Test {
+protected:
+  LexerTest()
+    : FileMgr(FileMgrOpts),
+      DiagID(new DiagnosticIDs()),
+      Diags(DiagID, new IgnoringDiagConsumer()),
+      SourceMgr(Diags, FileMgr) {
+    TargetOpts.Triple = "x86_64-apple-darwin11.1.0";
+    Target = TargetInfo::CreateTargetInfo(Diags, TargetOpts);
+  }
+
+  FileSystemOptions FileMgrOpts;
+  FileManager FileMgr;
+  llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID;
+  DiagnosticsEngine Diags;
+  SourceManager SourceMgr;
+  LangOptions LangOpts;
+  TargetOptions TargetOpts;
+  llvm::IntrusiveRefCntPtr<TargetInfo> Target;
+};
+
+class VoidModuleLoader : public ModuleLoader {
+  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
+                             Module::NameVisibilityKind Visibility,
+                             bool IsInclusionDirective) {
+    return 0;
+  }
+};
+
+TEST_F(LexerTest, LexAPI) {
+  const char *source =
+    "#define M(x) [x]\n"
+    "M(foo)";
+  MemoryBuffer *buf = MemoryBuffer::getMemBuffer(source);
+  FileID mainFileID = SourceMgr.createMainFileIDForMemBuffer(buf);
+
+  VoidModuleLoader ModLoader;
+  HeaderSearch HeaderInfo(FileMgr, Diags, LangOpts);
+  Preprocessor PP(Diags, LangOpts,
+                  Target.getPtr(),
+                  SourceMgr, HeaderInfo, ModLoader,
+                  /*IILookup =*/ 0,
+                  /*OwnsHeaderSearch =*/false,
+                  /*DelayInitialization =*/ false);
+  PP.EnterMainSourceFile();
+
+  std::vector<Token> toks;
+  while (1) {
+    Token tok;
+    PP.Lex(tok);
+    if (tok.is(tok::eof))
+      break;
+    toks.push_back(tok);
+  }
+
+  // Make sure we got the tokens that we expected.
+  ASSERT_EQ(3U, toks.size());
+  ASSERT_EQ(tok::l_square, toks[0].getKind());
+  ASSERT_EQ(tok::identifier, toks[1].getKind());
+  ASSERT_EQ(tok::r_square, toks[2].getKind());
+  
+  SourceLocation lsqrLoc = toks[0].getLocation();
+  SourceLocation idLoc = toks[1].getLocation();
+  SourceLocation rsqrLoc = toks[2].getLocation();
+  
+  EXPECT_TRUE(Lexer::isAtStartOfMacroExpansion(lsqrLoc, SourceMgr, LangOpts));
+  EXPECT_FALSE(Lexer::isAtStartOfMacroExpansion(idLoc, SourceMgr, LangOpts));
+  EXPECT_FALSE(Lexer::isAtEndOfMacroExpansion(idLoc, SourceMgr, LangOpts));
+  EXPECT_TRUE(Lexer::isAtEndOfMacroExpansion(rsqrLoc, SourceMgr, LangOpts));
+}
+
+} // anonymous namespace
diff --git a/unittests/Lex/Makefile b/unittests/Lex/Makefile
new file mode 100644
index 0000000000..bb9c6bc390
--- /dev/null
+++ b/unittests/Lex/Makefile
@@ -0,0 +1,15 @@
+##===- unittests/Lex/Makefile ------------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+CLANG_LEVEL = ../..
+TESTNAME = Lex
+LINK_COMPONENTS := support mc
+USEDLIBS = clangLex.a clangBasic.a
+
+include $(CLANG_LEVEL)/unittests/Makefile
diff --git a/unittests/Makefile b/unittests/Makefile
index 951e17e217..66c006232d 100644
--- a/unittests/Makefile
+++ b/unittests/Makefile
@@ -14,7 +14,7 @@ ifndef CLANG_LEVEL
 
 IS_UNITTEST_LEVEL := 1
 CLANG_LEVEL := ..
-PARALLEL_DIRS = Basic Frontend
+PARALLEL_DIRS = Basic Frontend Lex
 
 endif  # CLANG_LEVEL