[lldb][progress][NFC] Add unit test for progress reports (llvm#79533)

This test is being added as a way to check the behaviour of how progress
events are broadcasted when reports are started and ended with the
current implementation of progress reports. Here we're mainly checking
and ensuring that the current behaviour is that progress events are
broadcasted individually and placed in the event queue in order of their
creation and deletion.

lldb/unittests/Core/CMakeLists.txt

@@ -7,6 +7,7 @@ add_lldb_unittest(LLDBCoreTests
   FormatEntityTest.cpp
   MangledTest.cpp
   ModuleSpecTest.cpp
+  ProgressReportTest.cpp
   RichManglingContextTest.cpp
   SourceLocationSpecTest.cpp
   SourceManagerTest.cpp

lldb/unittests/Core/ProgressReportTest.cpp

@@ -0,0 +1,124 @@
+//===-- ProgressReportTest.cpp --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "Plugins/Platform/MacOSX/PlatformMacOSX.h"
+#include "Plugins/Platform/MacOSX/PlatformRemoteMacOSX.h"
+#include "TestingSupport/SubsystemRAII.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/Progress.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Utility/Listener.h"
+#include "gtest/gtest.h"
+#include <thread>
+
+using namespace lldb;
+using namespace lldb_private;
+
+class ProgressReportTest : public ::testing::Test {
+  SubsystemRAII<FileSystem, HostInfo, PlatformMacOSX> subsystems;
+
+  // The debugger's initialization function can't be called with no arguments
+  // so calling it using SubsystemRAII will cause the test build to fail as
+  // SubsystemRAII will call Initialize with no arguments. As such we set it up
+  // here the usual way.
+  void SetUp() override { Debugger::Initialize(nullptr); }
+  void TearDown() override { Debugger::Terminate(); }
+};
+
+TEST_F(ProgressReportTest, TestReportCreation) {
+  std::chrono::milliseconds timeout(100);
+
+  // Set up the debugger, make sure that was done properly.
+  ArchSpec arch("x86_64-apple-macosx-");
+  Platform::SetHostPlatform(PlatformRemoteMacOSX::CreateInstance(true, &arch));
+
+  DebuggerSP debugger_sp = Debugger::CreateInstance();
+  ASSERT_TRUE(debugger_sp);
+
+  // Get the debugger's broadcaster.
+  Broadcaster &broadcaster = debugger_sp->GetBroadcaster();
+
+  // Create a listener, make sure it can receive events and that it's
+  // listening to the correct broadcast bit.
+  ListenerSP listener_sp = Listener::MakeListener("progress-listener");
+
+  listener_sp->StartListeningForEvents(&broadcaster,
+                                       Debugger::eBroadcastBitProgress);
+  EXPECT_TRUE(
+      broadcaster.EventTypeHasListeners(Debugger::eBroadcastBitProgress));
+
+  EventSP event_sp;
+  const ProgressEventData *data;
+
+  // Scope this for RAII on the progress objects.
+  // Create progress reports and check that their respective events for having
+  // started and ended are broadcasted.
+  {
+    Progress progress1("Progress report 1", "Starting report 1");
+    Progress progress2("Progress report 2", "Starting report 2");
+    Progress progress3("Progress report 3", "Starting report 3");
+  }
+
+  // Start popping events from the queue, they should have been recevied
+  // in this order:
+  // Starting progress: 1, 2, 3
+  // Ending progress: 3, 2, 1
+  EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
+  data = ProgressEventData::GetEventDataFromEvent(event_sp.get());
+
+  ASSERT_EQ(data->GetDetails(), "Starting report 1");
+  ASSERT_FALSE(data->IsFinite());
+  ASSERT_FALSE(data->GetCompleted());
+  ASSERT_EQ(data->GetTotal(), Progress::kNonDeterministicTotal);
+  ASSERT_EQ(data->GetMessage(), "Progress report 1: Starting report 1");
+
+  EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
+  data = ProgressEventData::GetEventDataFromEvent(event_sp.get());
+
+  ASSERT_EQ(data->GetDetails(), "Starting report 2");
+  ASSERT_FALSE(data->IsFinite());
+  ASSERT_FALSE(data->GetCompleted());
+  ASSERT_EQ(data->GetTotal(), Progress::kNonDeterministicTotal);
+  ASSERT_EQ(data->GetMessage(), "Progress report 2: Starting report 2");
+
+  EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
+  data = ProgressEventData::GetEventDataFromEvent(event_sp.get());
+  ASSERT_EQ(data->GetDetails(), "Starting report 3");
+  ASSERT_FALSE(data->IsFinite());
+  ASSERT_FALSE(data->GetCompleted());
+  ASSERT_EQ(data->GetTotal(), Progress::kNonDeterministicTotal);
+  ASSERT_EQ(data->GetMessage(), "Progress report 3: Starting report 3");
+
+  // Progress report objects should be destroyed at this point so
+  // get each report from the queue and check that they've been
+  // destroyed in reverse order.
+  EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
+  data = ProgressEventData::GetEventDataFromEvent(event_sp.get());
+
+  ASSERT_EQ(data->GetTitle(), "Progress report 3");
+  ASSERT_TRUE(data->GetCompleted());
+  ASSERT_FALSE(data->IsFinite());
+  ASSERT_EQ(data->GetMessage(), "Progress report 3: Starting report 3");
+
+  EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
+  data = ProgressEventData::GetEventDataFromEvent(event_sp.get());
+
+  ASSERT_EQ(data->GetTitle(), "Progress report 2");
+  ASSERT_TRUE(data->GetCompleted());
+  ASSERT_FALSE(data->IsFinite());
+  ASSERT_EQ(data->GetMessage(), "Progress report 2: Starting report 2");
+
+  EXPECT_TRUE(listener_sp->GetEvent(event_sp, timeout));
+  data = ProgressEventData::GetEventDataFromEvent(event_sp.get());
+
+  ASSERT_EQ(data->GetTitle(), "Progress report 1");
+  ASSERT_TRUE(data->GetCompleted());
+  ASSERT_FALSE(data->IsFinite());
+  ASSERT_EQ(data->GetMessage(), "Progress report 1: Starting report 1");
+}