Original patch by Talin.

* Added the first LLVM unittest -- DenseMap.
* Updated mkpatch utility to include llvm/unittests dir
* Added top-level target "unittests" to run all unittests


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61541 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ADT/DenseMapTest.cpp

@@ -0,0 +1,167 @@
+//===- llvm/unittest/ADT/DenseMapMap.cpp - DenseMap unit tests --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/DenseMap.h"
+
+using namespace llvm;
+
+namespace {
+
+// Test fixture
+class DenseMapTest : public testing::Test {
+protected:
+  DenseMap<uint32_t, uint32_t> uintMap;
+  DenseMap<uint32_t *, uint32_t *> uintPtrMap;
+  uint32_t dummyInt;
+};
+
+// Empty map tests
+TEST_F(DenseMapTest, EmptyIntMapTest) {
+  // Size tests
+  EXPECT_EQ(0u, uintMap.size());
+  EXPECT_TRUE(uintMap.empty());
+
+  // Iterator tests
+  EXPECT_TRUE(uintMap.begin() == uintMap.end());
+
+  // Lookup tests
+  EXPECT_FALSE(uintMap.count(0u));
+  EXPECT_TRUE(uintMap.find(0u) == uintMap.end());
+  EXPECT_EQ(0u, uintMap.lookup(0u));
+}
+
+// Empty map tests for pointer map
+TEST_F(DenseMapTest, EmptyPtrMapTest) {
+  // Size tests
+  EXPECT_EQ(0u, uintPtrMap.size());
+  EXPECT_TRUE(uintPtrMap.empty());
+
+  // Iterator tests
+  EXPECT_TRUE(uintPtrMap.begin() == uintPtrMap.end());
+
+  // Lookup tests
+  EXPECT_FALSE(uintPtrMap.count(&dummyInt));
+  EXPECT_TRUE(uintPtrMap.find(&dummyInt) == uintPtrMap.begin());
+  EXPECT_EQ(0, uintPtrMap.lookup(&dummyInt));
+}
+
+// Constant map tests
+TEST_F(DenseMapTest, ConstEmptyMapTest) {
+  const DenseMap<uint32_t, uint32_t> & constUintMap = uintMap;
+  const DenseMap<uint32_t *, uint32_t *> & constUintPtrMap = uintPtrMap;
+  EXPECT_EQ(0u, constUintMap.size());
+  EXPECT_EQ(0u, constUintPtrMap.size());
+  EXPECT_TRUE(constUintMap.empty());
+  EXPECT_TRUE(constUintPtrMap.empty());
+  EXPECT_TRUE(constUintMap.begin() == constUintMap.end());
+  EXPECT_TRUE(constUintPtrMap.begin() == constUintPtrMap.end());
+}
+
+// A map with a single entry
+TEST_F(DenseMapTest, SingleEntryMapTest) {
+  uintMap[0] = 1;
+
+  // Size tests
+  EXPECT_EQ(1u, uintMap.size());
+  EXPECT_FALSE(uintMap.begin() == uintMap.end());
+  EXPECT_FALSE(uintMap.empty());
+
+  // Iterator tests
+  DenseMap<uint32_t, uint32_t>::iterator it = uintMap.begin();
+  EXPECT_EQ(0u, it->first);
+  EXPECT_EQ(1u, it->second);
+  ++it;
+  EXPECT_TRUE(it == uintMap.end());
+
+  // Lookup tests
+  EXPECT_TRUE(uintMap.count(0u));
+  EXPECT_TRUE(uintMap.find(0u) == uintMap.begin());
+  EXPECT_EQ(1u, uintMap.lookup(0u));
+  EXPECT_EQ(1u, uintMap[0]);
+}
+
+// Test clear() method
+TEST_F(DenseMapTest, ClearTest) {
+  uintMap[0] = 1;
+  uintMap.clear();
+
+  EXPECT_EQ(0u, uintMap.size());
+  EXPECT_TRUE(uintMap.empty());
+  EXPECT_TRUE(uintMap.begin() == uintMap.end());
+}
+
+// Test erase(iterator) method
+TEST_F(DenseMapTest, EraseTest) {
+  uintMap[0] = 1;
+  uintMap.erase(uintMap.begin());
+
+  EXPECT_EQ(0u, uintMap.size());
+  EXPECT_TRUE(uintMap.empty());
+  EXPECT_TRUE(uintMap.begin() == uintMap.end());
+}
+
+// Test erase(value) method
+TEST_F(DenseMapTest, EraseTest2) {
+  uintMap[0] = 1;
+  uintMap.erase(0);
+
+  EXPECT_EQ(0u, uintMap.size());
+  EXPECT_TRUE(uintMap.empty());
+  EXPECT_TRUE(uintMap.begin() == uintMap.end());
+}
+
+// Test insert() method
+TEST_F(DenseMapTest, InsertTest) {
+  uintMap.insert(std::make_pair(0u, 1u));
+  EXPECT_EQ(1u, uintMap.size());
+  EXPECT_EQ(1u, uintMap[0]);
+}
+
+// Test copy constructor method
+TEST_F(DenseMapTest, AssignmentTest) {
+  uintMap[0] = 1;
+  DenseMap<uint32_t, uint32_t> copyMap(uintMap);
+
+  EXPECT_EQ(1u, copyMap.size());
+  EXPECT_EQ(1u, copyMap[0]);
+}
+
+// Test assignment operator method
+TEST_F(DenseMapTest, CopyConstructorTest) {
+  uintMap[0] = 1;
+  DenseMap<uint32_t, uint32_t> copyMap = uintMap;
+
+  EXPECT_EQ(1u, copyMap.size());
+  EXPECT_EQ(1u, copyMap[0]);
+}
+
+// A more complex iteration test
+TEST_F(DenseMapTest, IterationTest) {
+  bool visited[100];
+
+  // Insert 100 numbers into the map
+  for (int i = 0; i < 100; ++i) {
+    visited[i] = false;
+    uintMap[i] = 3;
+  }
+
+  // Iterate over all numbers and mark each one found.
+  for (DenseMap<uint32_t, uint32_t>::iterator it = uintMap.begin();
+      it != uintMap.end(); ++it) {
+    visited[it->first] = true;
+  }
+
+  // Ensure every number was visited.
+  for (int i = 0; i < 100; ++i) {
+    EXPECT_EQ(true, visited[i]);
+  }
+}
+
+}