[call] Fix fuzzer found bug in client_call_test (#36848)

FuzzingEventEngine can add some big arbitrary delays -- account for that.

Closes #36848

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36848 from ctiller:f-cc af18b7a0cd
PiperOrigin-RevId: 641281105

test/core/call/client_call_test.cc

@@ -98,7 +98,10 @@ class ClientCallTest : public YodelTest {
       return;
     }
     expectations_ = 0;
-    cq_verifier_->Verify(timeout.value_or(Duration::Seconds(10)), whence);
+    cq_verifier_->Verify(
+        timeout.value_or(g_yodel_fuzzing ? Duration::Minutes(5)
+                                         : Duration::Seconds(10)),
+        whence);
   }
 
   CallHandler& handler() {

test/core/call/yodel/fuzzer_main.cc

@@ -35,6 +35,7 @@
 bool squelch = true;
 
 DEFINE_PROTO_FUZZER(const transport_test_suite::Msg& msg) {
+  grpc_core::g_yodel_fuzzing = true;
   static const grpc_core::NoDestruct<
       std::vector<grpc_core::yodel_detail::TestRegistry::Test>>
       tests{grpc_core::yodel_detail::TestRegistry::AllTests()};

test/core/call/yodel/test_main.cc

@@ -19,6 +19,7 @@
 #include "test/core/test_util/test_config.h"
 
 int main(int argc, char** argv) {
+  grpc_core::g_yodel_fuzzing = false;
   grpc::testing::TestEnvironment env(&argc, argv);
   absl::BitGen bitgen;
   ::testing::InitGoogleTest(&argc, argv);

test/core/call/yodel/yodel_test.cc

@@ -27,6 +27,8 @@
 
 namespace grpc_core {
 
+bool g_yodel_fuzzing;
+
 namespace yodel_detail {
 
 TestRegistry* TestRegistry::root_ = nullptr;

test/core/call/yodel/yodel_test.h

@@ -37,6 +37,8 @@ namespace grpc_core {
 
 class YodelTest;
 
+extern bool g_yodel_fuzzing;
+
 namespace yodel_detail {
 
 // Capture the name and location of a test step.