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llvm-project/clang-tools-extra/clangd/unittests/TUSchedulerTests.cpp

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//===-- TUSchedulerTests.cpp ------------------------------------*- C++ -*-===//
//
// 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 "Annotations.h"
#include "Context.h"
#include "Matchers.h"
#include "TUScheduler.h"
#include "TestFS.h"
#include "llvm/ADT/ScopeExit.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <algorithm>
#include <utility>
namespace clang {
namespace clangd {
namespace {
using ::testing::AnyOf;
using ::testing::Each;
using ::testing::ElementsAre;
using ::testing::Pointee;
using ::testing::UnorderedElementsAre;
MATCHER_P2(TUState, State, ActionName, "") {
return arg.Action.S == State && arg.Action.Name == ActionName;
}
class TUSchedulerTests : public ::testing::Test {
protected:
ParseInputs getInputs(PathRef File, std::string Contents) {
ParseInputs Inputs;
Inputs.CompileCommand = *CDB.getCompileCommand(File);
Inputs.FS = buildTestFS(Files, Timestamps);
Inputs.Contents = std::move(Contents);
Inputs.Opts = ParseOptions();
return Inputs;
}
void updateWithCallback(TUScheduler &S, PathRef File,
llvm::StringRef Contents, WantDiagnostics WD,
llvm::unique_function<void()> CB) {
WithContextValue Ctx(llvm::make_scope_exit(std::move(CB)));
S.update(File, getInputs(File, Contents), WD);
}
static Key<llvm::unique_function<void(PathRef File, std::vector<Diag>)>>
DiagsCallbackKey;
/// A diagnostics callback that should be passed to TUScheduler when it's used
/// in updateWithDiags.
static std::unique_ptr<ParsingCallbacks> captureDiags() {
class CaptureDiags : public ParsingCallbacks {
void onDiagnostics(PathRef File, std::vector<Diag> Diags) override {
auto D = Context::current().get(DiagsCallbackKey);
if (!D)
return;
const_cast<llvm::unique_function<void(PathRef, std::vector<Diag>)> &> (
*D)(File, Diags);
}
};
return llvm::make_unique<CaptureDiags>();
}
/// Schedule an update and call \p CB with the diagnostics it produces, if
/// any. The TUScheduler should be created with captureDiags as a
/// DiagsCallback for this to work.
void updateWithDiags(TUScheduler &S, PathRef File, ParseInputs Inputs,
WantDiagnostics WD,
llvm::unique_function<void(std::vector<Diag>)> CB) {
Path OrigFile = File.str();
WithContextValue Ctx(
DiagsCallbackKey,
Bind(
[OrigFile](decltype(CB) CB, PathRef File, std::vector<Diag> Diags) {
assert(File == OrigFile);
CB(std::move(Diags));
},
std::move(CB)));
S.update(File, std::move(Inputs), WD);
}
void updateWithDiags(TUScheduler &S, PathRef File, llvm::StringRef Contents,
WantDiagnostics WD,
llvm::unique_function<void(std::vector<Diag>)> CB) {
return updateWithDiags(S, File, getInputs(File, Contents), WD,
std::move(CB));
}
llvm::StringMap<std::string> Files;
llvm::StringMap<time_t> Timestamps;
MockCompilationDatabase CDB;
};
Key<llvm::unique_function<void(PathRef File, std::vector<Diag>)>>
TUSchedulerTests::DiagsCallbackKey;
TEST_F(TUSchedulerTests, MissingFiles) {
TUScheduler S(CDB, getDefaultAsyncThreadsCount(),
/*StorePreamblesInMemory=*/true, /*ASTCallbacks=*/nullptr,
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Added = testPath("added.cpp");
Files[Added] = "x";
auto Missing = testPath("missing.cpp");
Files[Missing] = "";
EXPECT_EQ(S.getContents(Added), "");
S.update(Added, getInputs(Added, "x"), WantDiagnostics::No);
EXPECT_EQ(S.getContents(Added), "x");
// Assert each operation for missing file is an error (even if it's available
// in VFS).
S.runWithAST("", Missing,
[&](Expected<InputsAndAST> AST) { EXPECT_ERROR(AST); });
S.runWithPreamble(
"", Missing, TUScheduler::Stale,
[&](Expected<InputsAndPreamble> Preamble) { EXPECT_ERROR(Preamble); });
// remove() shouldn't crash on missing files.
S.remove(Missing);
// Assert there aren't any errors for added file.
S.runWithAST("", Added,
[&](Expected<InputsAndAST> AST) { EXPECT_TRUE(bool(AST)); });
S.runWithPreamble("", Added, TUScheduler::Stale,
[&](Expected<InputsAndPreamble> Preamble) {
EXPECT_TRUE(bool(Preamble));
});
EXPECT_EQ(S.getContents(Added), "x");
S.remove(Added);
EXPECT_EQ(S.getContents(Added), "");
// Assert that all operations fail after removing the file.
S.runWithAST("", Added,
[&](Expected<InputsAndAST> AST) { EXPECT_ERROR(AST); });
S.runWithPreamble("", Added, TUScheduler::Stale,
[&](Expected<InputsAndPreamble> Preamble) {
ASSERT_FALSE(bool(Preamble));
llvm::consumeError(Preamble.takeError());
});
// remove() shouldn't crash on missing files.
S.remove(Added);
}
TEST_F(TUSchedulerTests, WantDiagnostics) {
std::atomic<int> CallbackCount(0);
{
// To avoid a racy test, don't allow tasks to actualy run on the worker
// thread until we've scheduled them all.
Notification Ready;
TUScheduler S(
CDB, getDefaultAsyncThreadsCount(),
/*StorePreamblesInMemory=*/true, captureDiags(),
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Path = testPath("foo.cpp");
updateWithDiags(S, Path, "", WantDiagnostics::Yes,
[&](std::vector<Diag>) { Ready.wait(); });
updateWithDiags(S, Path, "request diags", WantDiagnostics::Yes,
[&](std::vector<Diag>) { ++CallbackCount; });
updateWithDiags(S, Path, "auto (clobbered)", WantDiagnostics::Auto,
[&](std::vector<Diag>) {
ADD_FAILURE()
<< "auto should have been cancelled by auto";
});
updateWithDiags(S, Path, "request no diags", WantDiagnostics::No,
[&](std::vector<Diag>) {
ADD_FAILURE() << "no diags should not be called back";
});
updateWithDiags(S, Path, "auto (produces)", WantDiagnostics::Auto,
[&](std::vector<Diag>) { ++CallbackCount; });
Ready.notify();
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
}
EXPECT_EQ(2, CallbackCount);
}
TEST_F(TUSchedulerTests, Debounce) {
std::atomic<int> CallbackCount(0);
{
TUScheduler S(CDB, getDefaultAsyncThreadsCount(),
/*StorePreamblesInMemory=*/true, captureDiags(),
/*UpdateDebounce=*/std::chrono::seconds(1),
ASTRetentionPolicy());
// FIXME: we could probably use timeouts lower than 1 second here.
auto Path = testPath("foo.cpp");
updateWithDiags(S, Path, "auto (debounced)", WantDiagnostics::Auto,
[&](std::vector<Diag>) {
ADD_FAILURE()
<< "auto should have been debounced and canceled";
});
std::this_thread::sleep_for(std::chrono::milliseconds(200));
updateWithDiags(S, Path, "auto (timed out)", WantDiagnostics::Auto,
[&](std::vector<Diag>) { ++CallbackCount; });
std::this_thread::sleep_for(std::chrono::seconds(2));
updateWithDiags(S, Path, "auto (shut down)", WantDiagnostics::Auto,
[&](std::vector<Diag>) { ++CallbackCount; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
}
EXPECT_EQ(2, CallbackCount);
}
static std::vector<std::string> includes(const PreambleData *Preamble) {
std::vector<std::string> Result;
if (Preamble)
for (const auto &Inclusion : Preamble->Includes.MainFileIncludes)
Result.push_back(Inclusion.Written);
return Result;
}
TEST_F(TUSchedulerTests, PreambleConsistency) {
std::atomic<int> CallbackCount(0);
{
Notification InconsistentReadDone; // Must live longest.
TUScheduler S(
CDB, getDefaultAsyncThreadsCount(), /*StorePreamblesInMemory=*/true,
/*ASTCallbacks=*/nullptr,
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Path = testPath("foo.cpp");
// Schedule two updates (A, B) and two preamble reads (stale, consistent).
// The stale read should see A, and the consistent read should see B.
// (We recognize the preambles by their included files).
updateWithCallback(S, Path, "#include <A>", WantDiagnostics::Yes, [&]() {
// This callback runs in between the two preamble updates.
// This blocks update B, preventing it from winning the race
// against the stale read.
// If the first read was instead consistent, this would deadlock.
InconsistentReadDone.wait();
// This delays update B, preventing it from winning a race
// against the consistent read. The consistent read sees B
// only because it waits for it.
// If the second read was stale, it would usually see A.
std::this_thread::sleep_for(std::chrono::milliseconds(100));
});
S.update(Path, getInputs(Path, "#include <B>"), WantDiagnostics::Yes);
S.runWithPreamble("StaleRead", Path, TUScheduler::Stale,
[&](Expected<InputsAndPreamble> Pre) {
ASSERT_TRUE(bool(Pre));
assert(bool(Pre));
EXPECT_THAT(includes(Pre->Preamble),
ElementsAre("<A>"));
InconsistentReadDone.notify();
++CallbackCount;
});
S.runWithPreamble("ConsistentRead", Path, TUScheduler::Consistent,
[&](Expected<InputsAndPreamble> Pre) {
ASSERT_TRUE(bool(Pre));
EXPECT_THAT(includes(Pre->Preamble),
ElementsAre("<B>"));
++CallbackCount;
});
}
EXPECT_EQ(2, CallbackCount);
}
TEST_F(TUSchedulerTests, Cancellation) {
// We have the following update/read sequence
// U0
// U1(WantDiags=Yes) <-- cancelled
// R1 <-- cancelled
// U2(WantDiags=Yes) <-- cancelled
// R2A <-- cancelled
// R2B
// U3(WantDiags=Yes)
// R3 <-- cancelled
std::vector<std::string> DiagsSeen, ReadsSeen, ReadsCanceled;
{
Notification Proceed; // Ensure we schedule everything.
TUScheduler S(
CDB, getDefaultAsyncThreadsCount(), /*StorePreamblesInMemory=*/true,
/*ASTCallbacks=*/captureDiags(),
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Path = testPath("foo.cpp");
// Helper to schedule a named update and return a function to cancel it.
auto Update = [&](std::string ID) -> Canceler {
auto T = cancelableTask();
WithContext C(std::move(T.first));
updateWithDiags(
S, Path, "//" + ID, WantDiagnostics::Yes,
[&, ID](std::vector<Diag> Diags) { DiagsSeen.push_back(ID); });
return std::move(T.second);
};
// Helper to schedule a named read and return a function to cancel it.
auto Read = [&](std::string ID) -> Canceler {
auto T = cancelableTask();
WithContext C(std::move(T.first));
S.runWithAST(ID, Path, [&, ID](llvm::Expected<InputsAndAST> E) {
if (auto Err = E.takeError()) {
if (Err.isA<CancelledError>()) {
ReadsCanceled.push_back(ID);
consumeError(std::move(Err));
} else {
ADD_FAILURE() << "Non-cancelled error for " << ID << ": "
<< llvm::toString(std::move(Err));
}
} else {
ReadsSeen.push_back(ID);
}
});
return std::move(T.second);
};
updateWithCallback(S, Path, "", WantDiagnostics::Yes,
[&]() { Proceed.wait(); });
// The second parens indicate cancellation, where present.
Update("U1")();
Read("R1")();
Update("U2")();
Read("R2A")();
Read("R2B");
Update("U3");
Read("R3")();
Proceed.notify();
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
}
EXPECT_THAT(DiagsSeen, ElementsAre("U2", "U3"))
<< "U1 and all dependent reads were cancelled. "
"U2 has a dependent read R2A. "
"U3 was not cancelled.";
EXPECT_THAT(ReadsSeen, ElementsAre("R2B"))
<< "All reads other than R2B were cancelled";
EXPECT_THAT(ReadsCanceled, ElementsAre("R1", "R2A", "R3"))
<< "All reads other than R2B were cancelled";
}
TEST_F(TUSchedulerTests, ManyUpdates) {
const int FilesCount = 3;
const int UpdatesPerFile = 10;
std::mutex Mut;
int TotalASTReads = 0;
int TotalPreambleReads = 0;
int TotalUpdates = 0;
// Run TUScheduler and collect some stats.
{
TUScheduler S(CDB, getDefaultAsyncThreadsCount(),
/*StorePreamblesInMemory=*/true, captureDiags(),
/*UpdateDebounce=*/std::chrono::milliseconds(50),
ASTRetentionPolicy());
std::vector<std::string> Files;
for (int I = 0; I < FilesCount; ++I) {
std::string Name = "foo" + std::to_string(I) + ".cpp";
Files.push_back(testPath(Name));
this->Files[Files.back()] = "";
}
StringRef Contents1 = R"cpp(int a;)cpp";
StringRef Contents2 = R"cpp(int main() { return 1; })cpp";
StringRef Contents3 = R"cpp(int a; int b; int sum() { return a + b; })cpp";
StringRef AllContents[] = {Contents1, Contents2, Contents3};
const int AllContentsSize = 3;
// Scheduler may run tasks asynchronously, but should propagate the context.
// We stash a nonce in the context, and verify it in the task.
static Key<int> NonceKey;
int Nonce = 0;
for (int FileI = 0; FileI < FilesCount; ++FileI) {
for (int UpdateI = 0; UpdateI < UpdatesPerFile; ++UpdateI) {
auto Contents = AllContents[(FileI + UpdateI) % AllContentsSize];
auto File = Files[FileI];
auto Inputs = getInputs(File, Contents.str());
{
WithContextValue WithNonce(NonceKey, ++Nonce);
updateWithDiags(
S, File, Inputs, WantDiagnostics::Auto,
[File, Nonce, &Mut, &TotalUpdates](std::vector<Diag>) {
EXPECT_THAT(Context::current().get(NonceKey), Pointee(Nonce));
std::lock_guard<std::mutex> Lock(Mut);
++TotalUpdates;
EXPECT_EQ(File, *TUScheduler::getFileBeingProcessedInContext());
});
}
{
WithContextValue WithNonce(NonceKey, ++Nonce);
S.runWithAST(
"CheckAST", File,
[File, Inputs, Nonce, &Mut,
&TotalASTReads](Expected<InputsAndAST> AST) {
EXPECT_THAT(Context::current().get(NonceKey), Pointee(Nonce));
ASSERT_TRUE((bool)AST);
EXPECT_EQ(AST->Inputs.FS, Inputs.FS);
EXPECT_EQ(AST->Inputs.Contents, Inputs.Contents);
std::lock_guard<std::mutex> Lock(Mut);
++TotalASTReads;
EXPECT_EQ(File, *TUScheduler::getFileBeingProcessedInContext());
});
}
{
WithContextValue WithNonce(NonceKey, ++Nonce);
S.runWithPreamble(
"CheckPreamble", File, TUScheduler::Stale,
[File, Inputs, Nonce, &Mut,
&TotalPreambleReads](Expected<InputsAndPreamble> Preamble) {
EXPECT_THAT(Context::current().get(NonceKey), Pointee(Nonce));
ASSERT_TRUE((bool)Preamble);
EXPECT_EQ(Preamble->Contents, Inputs.Contents);
std::lock_guard<std::mutex> Lock(Mut);
++TotalPreambleReads;
EXPECT_EQ(File, *TUScheduler::getFileBeingProcessedInContext());
});
}
}
}
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
} // TUScheduler destructor waits for all operations to finish.
std::lock_guard<std::mutex> Lock(Mut);
EXPECT_EQ(TotalUpdates, FilesCount * UpdatesPerFile);
EXPECT_EQ(TotalASTReads, FilesCount * UpdatesPerFile);
EXPECT_EQ(TotalPreambleReads, FilesCount * UpdatesPerFile);
}
TEST_F(TUSchedulerTests, EvictedAST) {
std::atomic<int> BuiltASTCounter(0);
ASTRetentionPolicy Policy;
Policy.MaxRetainedASTs = 2;
TUScheduler S(CDB,
/*AsyncThreadsCount=*/1, /*StorePreambleInMemory=*/true,
/*ASTCallbacks=*/nullptr,
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
Policy);
llvm::StringLiteral SourceContents = R"cpp(
int* a;
double* b = a;
)cpp";
llvm::StringLiteral OtherSourceContents = R"cpp(
int* a;
double* b = a + 0;
)cpp";
auto Foo = testPath("foo.cpp");
auto Bar = testPath("bar.cpp");
auto Baz = testPath("baz.cpp");
// Build one file in advance. We will not access it later, so it will be the
// one that the cache will evict.
updateWithCallback(S, Foo, SourceContents, WantDiagnostics::Yes,
[&BuiltASTCounter]() { ++BuiltASTCounter; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
ASSERT_EQ(BuiltASTCounter.load(), 1);
// Build two more files. Since we can retain only 2 ASTs, these should be the
// ones we see in the cache later.
updateWithCallback(S, Bar, SourceContents, WantDiagnostics::Yes,
[&BuiltASTCounter]() { ++BuiltASTCounter; });
updateWithCallback(S, Baz, SourceContents, WantDiagnostics::Yes,
[&BuiltASTCounter]() { ++BuiltASTCounter; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
ASSERT_EQ(BuiltASTCounter.load(), 3);
// Check only the last two ASTs are retained.
ASSERT_THAT(S.getFilesWithCachedAST(), UnorderedElementsAre(Bar, Baz));
// Access the old file again.
updateWithCallback(S, Foo, OtherSourceContents, WantDiagnostics::Yes,
[&BuiltASTCounter]() { ++BuiltASTCounter; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
ASSERT_EQ(BuiltASTCounter.load(), 4);
// Check the AST for foo.cpp is retained now and one of the others got
// evicted.
EXPECT_THAT(S.getFilesWithCachedAST(),
UnorderedElementsAre(Foo, AnyOf(Bar, Baz)));
}
TEST_F(TUSchedulerTests, EmptyPreamble) {
TUScheduler S(CDB,
/*AsyncThreadsCount=*/4, /*StorePreambleInMemory=*/true,
/*ASTCallbacks=*/nullptr,
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Foo = testPath("foo.cpp");
auto Header = testPath("foo.h");
Files[Header] = "void foo()";
Timestamps[Header] = time_t(0);
auto WithPreamble = R"cpp(
#include "foo.h"
int main() {}
)cpp";
auto WithEmptyPreamble = R"cpp(int main() {})cpp";
S.update(Foo, getInputs(Foo, WithPreamble), WantDiagnostics::Auto);
S.runWithPreamble(
"getNonEmptyPreamble", Foo, TUScheduler::Stale,
[&](Expected<InputsAndPreamble> Preamble) {
// We expect to get a non-empty preamble.
EXPECT_GT(
cantFail(std::move(Preamble)).Preamble->Preamble.getBounds().Size,
0u);
});
// Wait for the preamble is being built.
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
// Update the file which results in an empty preamble.
S.update(Foo, getInputs(Foo, WithEmptyPreamble), WantDiagnostics::Auto);
// Wait for the preamble is being built.
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
S.runWithPreamble(
"getEmptyPreamble", Foo, TUScheduler::Stale,
[&](Expected<InputsAndPreamble> Preamble) {
// We expect to get an empty preamble.
EXPECT_EQ(
cantFail(std::move(Preamble)).Preamble->Preamble.getBounds().Size,
0u);
});
}
TEST_F(TUSchedulerTests, RunWaitsForPreamble) {
// Testing strategy: we update the file and schedule a few preamble reads at
// the same time. All reads should get the same non-null preamble.
TUScheduler S(CDB,
/*AsyncThreadsCount=*/4, /*StorePreambleInMemory=*/true,
/*ASTCallbacks=*/nullptr,
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Foo = testPath("foo.cpp");
auto NonEmptyPreamble = R"cpp(
#define FOO 1
#define BAR 2
int main() {}
)cpp";
constexpr int ReadsToSchedule = 10;
std::mutex PreamblesMut;
std::vector<const void *> Preambles(ReadsToSchedule, nullptr);
S.update(Foo, getInputs(Foo, NonEmptyPreamble), WantDiagnostics::Auto);
for (int I = 0; I < ReadsToSchedule; ++I) {
S.runWithPreamble(
"test", Foo, TUScheduler::Stale,
[I, &PreamblesMut, &Preambles](Expected<InputsAndPreamble> IP) {
std::lock_guard<std::mutex> Lock(PreamblesMut);
Preambles[I] = cantFail(std::move(IP)).Preamble;
});
}
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
// Check all actions got the same non-null preamble.
std::lock_guard<std::mutex> Lock(PreamblesMut);
ASSERT_NE(Preambles[0], nullptr);
ASSERT_THAT(Preambles, Each(Preambles[0]));
}
TEST_F(TUSchedulerTests, NoopOnEmptyChanges) {
TUScheduler S(CDB,
/*AsyncThreadsCount=*/getDefaultAsyncThreadsCount(),
/*StorePreambleInMemory=*/true, captureDiags(),
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto Source = testPath("foo.cpp");
auto Header = testPath("foo.h");
Files[Header] = "int a;";
Timestamps[Header] = time_t(0);
auto SourceContents = R"cpp(
#include "foo.h"
int b = a;
)cpp";
// Return value indicates if the updated callback was received.
auto DoUpdate = [&](std::string Contents) -> bool {
std::atomic<bool> Updated(false);
Updated = false;
updateWithDiags(S, Source, Contents, WantDiagnostics::Yes,
[&Updated](std::vector<Diag>) { Updated = true; });
bool UpdateFinished = S.blockUntilIdle(timeoutSeconds(10));
if (!UpdateFinished)
ADD_FAILURE() << "Updated has not finished in one second. Threading bug?";
return Updated;
};
// Test that subsequent updates with the same inputs do not cause rebuilds.
ASSERT_TRUE(DoUpdate(SourceContents));
ASSERT_FALSE(DoUpdate(SourceContents));
// Update to a header should cause a rebuild, though.
Timestamps[Header] = time_t(1);
ASSERT_TRUE(DoUpdate(SourceContents));
ASSERT_FALSE(DoUpdate(SourceContents));
// Update to the contents should cause a rebuild.
auto OtherSourceContents = R"cpp(
#include "foo.h"
int c = d;
)cpp";
ASSERT_TRUE(DoUpdate(OtherSourceContents));
ASSERT_FALSE(DoUpdate(OtherSourceContents));
// Update to the compile commands should also cause a rebuild.
CDB.ExtraClangFlags.push_back("-DSOMETHING");
ASSERT_TRUE(DoUpdate(OtherSourceContents));
ASSERT_FALSE(DoUpdate(OtherSourceContents));
}
TEST_F(TUSchedulerTests, NoChangeDiags) {
TUScheduler S(CDB,
/*AsyncThreadsCount=*/getDefaultAsyncThreadsCount(),
/*StorePreambleInMemory=*/true, captureDiags(),
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
auto FooCpp = testPath("foo.cpp");
auto Contents = "int a; int b;";
updateWithDiags(
S, FooCpp, Contents, WantDiagnostics::No,
[](std::vector<Diag>) { ADD_FAILURE() << "Should not be called."; });
S.runWithAST("touchAST", FooCpp, [](Expected<InputsAndAST> IA) {
// Make sure the AST was actually built.
cantFail(std::move(IA));
});
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
// Even though the inputs didn't change and AST can be reused, we need to
// report the diagnostics, as they were not reported previously.
std::atomic<bool> SeenDiags(false);
updateWithDiags(S, FooCpp, Contents, WantDiagnostics::Auto,
[&](std::vector<Diag>) { SeenDiags = true; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
ASSERT_TRUE(SeenDiags);
// Subsequent request does not get any diagnostics callback because the same
// diags have previously been reported and the inputs didn't change.
updateWithDiags(
S, FooCpp, Contents, WantDiagnostics::Auto,
[&](std::vector<Diag>) { ADD_FAILURE() << "Should not be called."; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
}
TEST_F(TUSchedulerTests, Run) {
TUScheduler S(CDB, /*AsyncThreadsCount=*/getDefaultAsyncThreadsCount(),
/*StorePreambleInMemory=*/true, /*ASTCallbacks=*/nullptr,
/*UpdateDebounce=*/std::chrono::steady_clock::duration::zero(),
ASTRetentionPolicy());
std::atomic<int> Counter(0);
S.run("add 1", [&] { ++Counter; });
S.run("add 2", [&] { Counter += 2; });
ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(10)));
EXPECT_EQ(Counter.load(), 3);
}
TEST_F(TUSchedulerTests, TUStatus) {
class CaptureTUStatus : public DiagnosticsConsumer {
public:
void onDiagnosticsReady(PathRef File,
std::vector<Diag> Diagnostics) override {}
void onFileUpdated(PathRef File, const TUStatus &Status) override {
std::lock_guard<std::mutex> Lock(Mutex);
AllStatus.push_back(Status);
}
std::vector<TUStatus> allStatus() {
std::lock_guard<std::mutex> Lock(Mutex);
return AllStatus;
}
private:
std::mutex Mutex;
std::vector<TUStatus> AllStatus;
} CaptureTUStatus;
MockFSProvider FS;
MockCompilationDatabase CDB;
ClangdServer Server(CDB, FS, CaptureTUStatus, ClangdServer::optsForTest());
Annotations Code("int m^ain () {}");
// We schedule the following tasks in the queue:
// [Update] [GoToDefinition]
Server.addDocument(testPath("foo.cpp"), Code.code(), WantDiagnostics::Yes);
Server.locateSymbolAt(testPath("foo.cpp"), Code.point(),
[](Expected<std::vector<LocatedSymbol>> Result) {
ASSERT_TRUE((bool)Result);
});
ASSERT_TRUE(Server.blockUntilIdleForTest());
EXPECT_THAT(CaptureTUStatus.allStatus(),
ElementsAre(
// Statuses of "Update" action.
TUState(TUAction::RunningAction, "Update"),
TUState(TUAction::BuildingPreamble, "Update"),
TUState(TUAction::BuildingFile, "Update"),
// Statuses of "Definitions" action
TUState(TUAction::RunningAction, "Definitions"),
TUState(TUAction::Idle, /*No action*/ "")));
}
} // namespace
} // namespace clangd
} // namespace clang
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