Hexagon/LLVMBuild.txt: Prune CRLF.

[oota-llvm.git] / unittests / ADT / ilistTest.cpp

diff --git a/unittests/ADT/ilistTest.cpp b/unittests/ADT/ilistTest.cpp
index 09a699a9624640983b36e6fe82c632eccc2cec6f..44442ebf75adc69bf8c50dff8460a699f631dd0c 100644 (file)
--- a/unittests/ADT/ilistTest.cpp
+++ b/unittests/ADT/ilistTest.cpp
@@ -7,10 +7,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include <ostream>
-#include "gtest/gtest.h"
 #include "llvm/ADT/ilist.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/ilist_node.h"
+#include "gtest/gtest.h"
+#include <ostream>
 
 using namespace llvm;
 
@@ -21,14 +22,15 @@ struct Node : ilist_node<Node> {
 
   Node() {}
   Node(int _Value) : Value(_Value) {}
+  ~Node() { Value = -1; }
 };
 
 TEST(ilistTest, Basic) {
   ilist<Node> List;
   List.push_back(Node(1));
   EXPECT_EQ(1, List.back().Value);
-  EXPECT_EQ(0, List.back().getPrevNode());
-  EXPECT_EQ(0, List.back().getNextNode());
+  EXPECT_EQ(nullptr, List.back().getPrevNode());
+  EXPECT_EQ(nullptr, List.back().getNextNode());
 
   List.push_back(Node(2));
   EXPECT_EQ(2, List.back().Value);
@@ -41,4 +43,56 @@ TEST(ilistTest, Basic) {
   EXPECT_EQ(1, ConstList.back().getPrevNode()->Value);
 }
 
+TEST(ilistTest, SpliceOne) {
+  ilist<Node> List;
+  List.push_back(1);
+
+  // The single-element splice operation supports noops.
+  List.splice(List.begin(), List, List.begin());
+  EXPECT_EQ(1u, List.size());
+  EXPECT_EQ(1, List.front().Value);
+  EXPECT_TRUE(std::next(List.begin()) == List.end());
+
+  // Altenative noop. Move the first element behind itself.
+  List.push_back(2);
+  List.push_back(3);
+  List.splice(std::next(List.begin()), List, List.begin());
+  EXPECT_EQ(3u, List.size());
+  EXPECT_EQ(1, List.front().Value);
+  EXPECT_EQ(2, std::next(List.begin())->Value);
+  EXPECT_EQ(3, List.back().Value);
+}
+
+TEST(ilistTest, UnsafeClear) {
+  ilist<Node> List;
+
+  // Before even allocating a sentinel.
+  List.clearAndLeakNodesUnsafely();
+  EXPECT_EQ(0u, List.size());
+
+  // Empty list with sentinel.
+  ilist<Node>::iterator E = List.end();
+  List.clearAndLeakNodesUnsafely();
+  EXPECT_EQ(0u, List.size());
+  // The sentinel shouldn't change.
+  EXPECT_TRUE(E == List.end());
+
+  // List with contents.
+  List.push_back(1);
+  ASSERT_EQ(1u, List.size());
+  Node *N = List.begin();
+  EXPECT_EQ(1, N->Value);
+  List.clearAndLeakNodesUnsafely();
+  EXPECT_EQ(0u, List.size());
+  ASSERT_EQ(1, N->Value);
+  delete N;
+
+  // List is still functional.
+  List.push_back(5);
+  List.push_back(6);
+  ASSERT_EQ(2u, List.size());
+  EXPECT_EQ(5, List.front().Value);
+  EXPECT_EQ(6, List.back().Value);
+}
+
 }