UnorderedElementsAre(Foo, AnyOf(Bar, Baz)));
}
+TEST_F(TUSchedulerTests, EmptyPreamble) {
+ TUScheduler S(
+ /*AsyncThreadsCount=*/4, /*StorePreambleInMemory=*/true,
+ PreambleParsedCallback(),
+ /*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,
+ [](std::vector<Diag>) {});
+ S.runWithPreamble("getNonEmptyPreamble", Foo,
+ [&](llvm::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(1)));
+
+ // Update the file which results in an empty preamble.
+ S.update(Foo, getInputs(Foo, WithEmptyPreamble), WantDiagnostics::Auto,
+ [](std::vector<Diag>) {});
+ // Wait for the preamble is being built.
+ ASSERT_TRUE(S.blockUntilIdle(timeoutSeconds(1)));
+ S.runWithPreamble("getEmptyPreamble", Foo,
+ [&](llvm::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.