unittests/ADT/IListNodeBaseTest.cpp

   1 //===- unittests/ADT/IListNodeBaseTest.cpp - ilist_node_base unit tests ---===//
   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 "llvm/ADT/ilist_node_base.h"
  10 #include "gtest/gtest.h"
  11
  12 using namespace llvm;
  13
  14 namespace {
  15
  16 typedef ilist_node_base<false> RawNode;
  17 typedef ilist_node_base<true> TrackingNode;
  18
  19 TEST(IListNodeBaseTest, DefaultConstructor) {
  20   RawNode A;
  21   EXPECT_EQ(nullptr, A.getPrev());
  22   EXPECT_EQ(nullptr, A.getNext());
  23   EXPECT_FALSE(A.isKnownSentinel());
  24
  25   TrackingNode TA;
  26   EXPECT_EQ(nullptr, TA.getPrev());
  27   EXPECT_EQ(nullptr, TA.getNext());
  28   EXPECT_FALSE(TA.isKnownSentinel());
  29   EXPECT_FALSE(TA.isSentinel());
  30 }
  31
  32 TEST(IListNodeBaseTest, setPrevAndNext) {
  33   RawNode A, B, C;
  34   A.setPrev(&B);
  35   EXPECT_EQ(&B, A.getPrev());
  36   EXPECT_EQ(nullptr, A.getNext());
  37   EXPECT_EQ(nullptr, B.getPrev());
  38   EXPECT_EQ(nullptr, B.getNext());
  39   EXPECT_EQ(nullptr, C.getPrev());
  40   EXPECT_EQ(nullptr, C.getNext());
  41
  42   A.setNext(&C);
  43   EXPECT_EQ(&B, A.getPrev());
  44   EXPECT_EQ(&C, A.getNext());
  45   EXPECT_EQ(nullptr, B.getPrev());
  46   EXPECT_EQ(nullptr, B.getNext());
  47   EXPECT_EQ(nullptr, C.getPrev());
  48   EXPECT_EQ(nullptr, C.getNext());
  49
  50   TrackingNode TA, TB, TC;
  51   TA.setPrev(&TB);
  52   EXPECT_EQ(&TB, TA.getPrev());
  53   EXPECT_EQ(nullptr, TA.getNext());
  54   EXPECT_EQ(nullptr, TB.getPrev());
  55   EXPECT_EQ(nullptr, TB.getNext());
  56   EXPECT_EQ(nullptr, TC.getPrev());
  57   EXPECT_EQ(nullptr, TC.getNext());
  58
  59   TA.setNext(&TC);
  60   EXPECT_EQ(&TB, TA.getPrev());
  61   EXPECT_EQ(&TC, TA.getNext());
  62   EXPECT_EQ(nullptr, TB.getPrev());
  63   EXPECT_EQ(nullptr, TB.getNext());
  64   EXPECT_EQ(nullptr, TC.getPrev());
  65   EXPECT_EQ(nullptr, TC.getNext());
  66 }
  67
  68 TEST(IListNodeBaseTest, isKnownSentinel) {
  69   // Without sentinel tracking.
  70   RawNode A, B;
  71   EXPECT_FALSE(A.isKnownSentinel());
  72   A.setPrev(&B);
  73   A.setNext(&B);
  74   EXPECT_EQ(&B, A.getPrev());
  75   EXPECT_EQ(&B, A.getNext());
  76   EXPECT_FALSE(A.isKnownSentinel());
  77   A.initializeSentinel();
  78   EXPECT_FALSE(A.isKnownSentinel());
  79   EXPECT_EQ(&B, A.getPrev());
  80   EXPECT_EQ(&B, A.getNext());
  81
  82   // With sentinel tracking.
  83   TrackingNode TA, TB;
  84   EXPECT_FALSE(TA.isKnownSentinel());
  85   EXPECT_FALSE(TA.isSentinel());
  86   TA.setPrev(&TB);
  87   TA.setNext(&TB);
  88   EXPECT_EQ(&TB, TA.getPrev());
  89   EXPECT_EQ(&TB, TA.getNext());
  90   EXPECT_FALSE(TA.isKnownSentinel());
  91   EXPECT_FALSE(TA.isSentinel());
  92   TA.initializeSentinel();
  93   EXPECT_TRUE(TA.isKnownSentinel());
  94   EXPECT_TRUE(TA.isSentinel());
  95   EXPECT_EQ(&TB, TA.getPrev());
  96   EXPECT_EQ(&TB, TA.getNext());
  97 }
  98
  99 } // end namespace