Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/unittests/Support/LineIteratorTest.cpp

@@ -0,0 +1,193 @@
+//===- LineIterator.cpp - Unit tests --------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/LineIterator.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace llvm::sys;
+
+namespace {
+
+TEST(LineIteratorTest, Basic) {
+  std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("line 1\n"
+                                                                    "line 2\n"
+                                                                    "line 3");
+
+  line_iterator I = line_iterator(*Buffer), E;
+
+  EXPECT_FALSE(I.is_at_eof());
+  EXPECT_NE(E, I);
+
+  EXPECT_EQ("line 1", *I);
+  EXPECT_EQ(1, I.line_number());
+  ++I;
+  EXPECT_EQ("line 2", *I);
+  EXPECT_EQ(2, I.line_number());
+  ++I;
+  EXPECT_EQ("line 3", *I);
+  EXPECT_EQ(3, I.line_number());
+  ++I;
+
+  EXPECT_TRUE(I.is_at_eof());
+  EXPECT_EQ(E, I);
+}
+
+TEST(LineIteratorTest, CommentAndBlankSkipping) {
+  std::unique_ptr<MemoryBuffer> Buffer(
+      MemoryBuffer::getMemBuffer("line 1\n"
+                                 "line 2\n"
+                                 "# Comment 1\n"
+                                 "\n"
+                                 "line 5\n"
+                                 "\n"
+                                 "# Comment 2"));
+
+  line_iterator I = line_iterator(*Buffer, true, '#'), E;
+
+  EXPECT_FALSE(I.is_at_eof());
+  EXPECT_NE(E, I);
+
+  EXPECT_EQ("line 1", *I);
+  EXPECT_EQ(1, I.line_number());
+  ++I;
+  EXPECT_EQ("line 2", *I);
+  EXPECT_EQ(2, I.line_number());
+  ++I;
+  EXPECT_EQ("line 5", *I);
+  EXPECT_EQ(5, I.line_number());
+  ++I;
+
+  EXPECT_TRUE(I.is_at_eof());
+  EXPECT_EQ(E, I);
+}
+
+TEST(LineIteratorTest, CommentSkippingKeepBlanks) {
+  std::unique_ptr<MemoryBuffer> Buffer(
+      MemoryBuffer::getMemBuffer("line 1\n"
+                                 "line 2\n"
+                                 "# Comment 1\n"
+                                 "# Comment 2\n"
+                                 "\n"
+                                 "line 6\n"
+                                 "\n"
+                                 "# Comment 3"));
+
+  line_iterator I = line_iterator(*Buffer, false, '#'), E;
+
+  EXPECT_FALSE(I.is_at_eof());
+  EXPECT_NE(E, I);
+
+  EXPECT_EQ("line 1", *I);
+  EXPECT_EQ(1, I.line_number());
+  ++I;
+  EXPECT_EQ("line 2", *I);
+  EXPECT_EQ(2, I.line_number());
+  ++I;
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(5, I.line_number());
+  ++I;
+  EXPECT_EQ("line 6", *I);
+  EXPECT_EQ(6, I.line_number());
+  ++I;
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(7, I.line_number());
+  ++I;
+
+  EXPECT_TRUE(I.is_at_eof());
+  EXPECT_EQ(E, I);
+}
+
+
+TEST(LineIteratorTest, BlankSkipping) {
+  std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("\n\n\n"
+                                                                    "line 1\n"
+                                                                    "\n\n\n"
+                                                                    "line 2\n"
+                                                                    "\n\n\n");
+
+  line_iterator I = line_iterator(*Buffer), E;
+
+  EXPECT_FALSE(I.is_at_eof());
+  EXPECT_NE(E, I);
+
+  EXPECT_EQ("line 1", *I);
+  EXPECT_EQ(4, I.line_number());
+  ++I;
+  EXPECT_EQ("line 2", *I);
+  EXPECT_EQ(8, I.line_number());
+  ++I;
+
+  EXPECT_TRUE(I.is_at_eof());
+  EXPECT_EQ(E, I);
+}
+
+TEST(LineIteratorTest, BlankKeeping) {
+  std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("\n\n"
+                                                                    "line 3\n"
+                                                                    "\n"
+                                                                    "line 5\n"
+                                                                    "\n\n");
+  line_iterator I = line_iterator(*Buffer, false), E;
+
+  EXPECT_FALSE(I.is_at_eof());
+  EXPECT_NE(E, I);
+
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(1, I.line_number());
+  ++I;
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(2, I.line_number());
+  ++I;
+  EXPECT_EQ("line 3", *I);
+  EXPECT_EQ(3, I.line_number());
+  ++I;
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(4, I.line_number());
+  ++I;
+  EXPECT_EQ("line 5", *I);
+  EXPECT_EQ(5, I.line_number());
+  ++I;
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(6, I.line_number());
+  ++I;
+  EXPECT_EQ("", *I);
+  EXPECT_EQ(7, I.line_number());
+  ++I;
+
+  EXPECT_TRUE(I.is_at_eof());
+  EXPECT_EQ(E, I);
+}
+
+TEST(LineIteratorTest, EmptyBuffers) {
+  std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("");
+  EXPECT_TRUE(line_iterator(*Buffer).is_at_eof());
+  EXPECT_EQ(line_iterator(), line_iterator(*Buffer));
+  EXPECT_TRUE(line_iterator(*Buffer, false).is_at_eof());
+  EXPECT_EQ(line_iterator(), line_iterator(*Buffer, false));
+
+  Buffer = MemoryBuffer::getMemBuffer("\n\n\n");
+  EXPECT_TRUE(line_iterator(*Buffer).is_at_eof());
+  EXPECT_EQ(line_iterator(), line_iterator(*Buffer));
+
+  Buffer = MemoryBuffer::getMemBuffer("# foo\n"
+                                      "\n"
+                                      "# bar");
+  EXPECT_TRUE(line_iterator(*Buffer, true, '#').is_at_eof());
+  EXPECT_EQ(line_iterator(), line_iterator(*Buffer, true, '#'));
+
+  Buffer = MemoryBuffer::getMemBuffer("\n"
+                                      "# baz\n"
+                                      "\n");
+  EXPECT_TRUE(line_iterator(*Buffer, true, '#').is_at_eof());
+  EXPECT_EQ(line_iterator(), line_iterator(*Buffer, true, '#'));
+}
+
+} // anonymous namespace