explanations_test.cc

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// Copyright 2024 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#include "explanations.h"
 
#include "test.h"
 
namespace {
 
const void* MakeItem(size_t v) {
  return reinterpret_cast<const void*>(v);
}
 
}  // namespace
 
TEST(Explanations, Explanations) {
  Explanations exp;
 
  exp.Record(MakeItem(1), "first explanation");
  exp.Record(MakeItem(1), "second explanation");
  exp.Record(MakeItem(2), "third explanation");
  exp.Record(MakeItem(2), "fourth %s", "explanation");
 
  std::vector<std::string> list;
 
  exp.LookupAndAppend(MakeItem(0), &list);
  ASSERT_TRUE(list.empty());
 
  exp.LookupAndAppend(MakeItem(1), &list);
  ASSERT_EQ(2u, list.size());
  EXPECT_EQ(list[0], "first explanation");
  EXPECT_EQ(list[1], "second explanation");
 
  exp.LookupAndAppend(MakeItem(2), &list);
  ASSERT_EQ(4u, list.size());
  EXPECT_EQ(list[0], "first explanation");
  EXPECT_EQ(list[1], "second explanation");
  EXPECT_EQ(list[2], "third explanation");
  EXPECT_EQ(list[3], "fourth explanation");
}
 
TEST(Explanations, OptionalExplanationsNonNull) {
  Explanations parent;
  OptionalExplanations exp(&parent);
 
  exp.Record(MakeItem(1), "first explanation");
  exp.Record(MakeItem(1), "second explanation");
  exp.Record(MakeItem(2), "third explanation");
  exp.Record(MakeItem(2), "fourth %s", "explanation");
 
  std::vector<std::string> list;
 
  exp.LookupAndAppend(MakeItem(0), &list);
  ASSERT_TRUE(list.empty());
 
  exp.LookupAndAppend(MakeItem(1), &list);
  ASSERT_EQ(2u, list.size());
  EXPECT_EQ(list[0], "first explanation");
  EXPECT_EQ(list[1], "second explanation");
 
  exp.LookupAndAppend(MakeItem(2), &list);
  ASSERT_EQ(4u, list.size());
  EXPECT_EQ(list[0], "first explanation");
  EXPECT_EQ(list[1], "second explanation");
  EXPECT_EQ(list[2], "third explanation");
  EXPECT_EQ(list[3], "fourth explanation");
}
 
TEST(Explanations, OptionalExplanationsWithNullPointer) {
  OptionalExplanations exp(nullptr);
 
  exp.Record(MakeItem(1), "first explanation");
  exp.Record(MakeItem(1), "second explanation");
  exp.Record(MakeItem(2), "third explanation");
  exp.Record(MakeItem(2), "fourth %s", "explanation");
 
  std::vector<std::string> list;
  exp.LookupAndAppend(MakeItem(0), &list);
  ASSERT_TRUE(list.empty());
 
  exp.LookupAndAppend(MakeItem(1), &list);
  ASSERT_TRUE(list.empty());
 
  exp.LookupAndAppend(MakeItem(2), &list);
  ASSERT_TRUE(list.empty());
}