QtGrpcClientUnaryCallTest: improve test logic for metadata()

Extend the testcase to cover both, initial and trailing metadata. This
also shows the current problems with having a QHash metadata and also
the missing separation between initial and trailing metadata.

Pick-to: 6.10 6.9 6.8
Change-Id: I880846ae06e8db338cdb3629dafdff430cab3edb
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

tests/auto/grpc/client/shared/test_server/testserverrunner.cpp

@@ -13,6 +13,7 @@
 #include <grpc++/grpc++.h>
 
 #include <memory>
+#include <charconv>
 
 namespace {
 
@@ -226,21 +227,45 @@ Status TestServiceServiceImpl::testMethodNonCompatibleArgRet(grpc::ServerContext
 Status TestServiceServiceImpl::testMetadata(grpc::ServerContext *ctx, const Empty *,
                                             qtgrpc::tests::Empty *)
 {
-    std::string client_return_header;
-    for (const auto &header : ctx->client_metadata()) {
-        if (header.first == "client_header") {
-            ctx->AddTrailingMetadata("server_header",
-                                     std::string(header.second.data(), header.second.size()));
-        } else if (header.first == "client_return_header") {
-            if (client_return_header.empty())
-                client_return_header = std::string(header.second.data(), header.second.size());
-            else
-                client_return_header = "invalid_value";
-        }
+    const auto &md = ctx->client_metadata();
+    auto initial = md.find("request_initial");
+    uint initialCount = 0;
+    if (initial != md.end()) {
+        std::string v (initial->second.begin(), initial->second.end());
+        auto result = std::from_chars(v.data(), v.data() + v.size(), initialCount);
+        if (result.ec != std::errc())
+            return { grpc::StatusCode::ABORTED, "conversion failed initial" };
     }
 
-    ctx->AddTrailingMetadata("client_return_header", client_return_header);
-    return Status();
+    auto trailing = md.find("request_trailing");
+    uint trailingCount = 0;
+    if (trailing != md.end()) {
+        std::string v (trailing->second.begin(), trailing->second.end());
+        auto result = std::from_chars(v.data(), v.data() + v.size(), trailingCount);
+        if (result.ec != std::errc())
+            return { grpc::StatusCode::ABORTED, "conversion failed trailing" };
+    }
+
+    auto sum = md.equal_range("request_sum");
+    uint sumCount = 0;
+    while (sum.first != sum.second) {
+        uint temp = 0;
+        std::string v (sum.first->second.begin(), sum.first->second.end());
+        auto result = std::from_chars(v.data(), v.data() + v.size(), temp);
+        if (result.ec != std::errc())
+            return { grpc::StatusCode::ABORTED, "conversion failed sum" };
+        sumCount += temp;
+        ++sum.first;
+    }
+
+    for (auto i = 0u; i < initialCount; ++i)
+        ctx->AddInitialMetadata("response_initial", std::to_string(i));
+    for (auto i = 0u; i < trailingCount; ++i)
+        ctx->AddTrailingMetadata("response_trailing", std::to_string(i));
+    if (sumCount > 0)
+        ctx->AddTrailingMetadata("response_sum", std::to_string(sumCount));
+
+    return Status::OK;
 }
 
 grpc::Status TestServiceServiceImpl::testMethodClientStream(

tests/auto/grpc/client/unarycall/tst_grpc_client_unarycall.cpp

@@ -142,37 +142,35 @@ void QtGrpcClientUnaryCallTest::asyncStatusMessage()
 void QtGrpcClientUnaryCallTest::metadata()
 {
     QGrpcCallOptions opt;
-    opt.setMetadata({
-        { "client_header",        "1"           },
-        { "client_return_header", "valid_value" }
-    });
+    QHash<QByteArray, QByteArray> clientMd{
+        { "request_initial",  "3"  },
+        { "request_trailing", "2"  },
+        { "request_sum",      "20" },
+        { "request_sum",      "10" }
+    };
+    QT_IGNORE_DEPRECATIONS(opt.setMetadata(clientMd);)
     auto reply = client()->testMetadata({}, opt);
+    QSignalSpy replyFinishedSpy(reply.get(), &QGrpcCallReply::finished);
+    QVERIFY(replyFinishedSpy.isValid());
 
-    QHash<QByteArray, QByteArray> metadata;
-    QEventLoop waiter;
+    QTRY_COMPARE_EQ_WITH_TIMEOUT(replyFinishedSpy.count(), 1, FailTimeout);
+    const auto &args = replyFinishedSpy.first();
+    QCOMPARE_EQ(args.count(), 1);
+    QVERIFY(args.first().value<QGrpcStatus>().isOk());
 
-    connect(
-        reply.get(), &QGrpcOperation::finished, this,
-        [&reply, &metadata, &waiter](const QGrpcStatus &) {
-            metadata = reply->metadata();
-            waiter.quit();
-        },
-        Qt::SingleShotConnection);
+    const auto &md = reply->metadata();
+    auto initialIt = md.equal_range("response_initial");
+    QCOMPARE_EQ(std::distance(initialIt.first, initialIt.second), 1);
+    QCOMPARE_EQ(initialIt.first.value(), "2");
 
-    waiter.exec();
+    auto trailingIt = md.equal_range("response_trailing");
+    QCOMPARE_EQ(std::distance(trailingIt.first, trailingIt.second), 1);
+    QCOMPARE_EQ(trailingIt.first.value(), "1");
 
-    int serverHeaderCount = 0;
-    QByteArray clientReturnHeader;
-    for (const auto &[key, value] : reply->metadata().asKeyValueRange()) {
-        if (key == "server_header") {
-            QCOMPARE_EQ(QString::fromLatin1(value), QString::number(++serverHeaderCount));
-        } else if (key == "client_return_header") {
-            clientReturnHeader = value;
-        }
-    }
-
-    QCOMPARE_EQ(serverHeaderCount, 1);
-    QCOMPARE_EQ(clientReturnHeader, "valid_value"_ba);
+    auto sumIt = md.equal_range("response_sum");
+    QCOMPARE_EQ(std::distance(sumIt.first, sumIt.second), 1);
+    auto sum = sumIt.first.value();
+    QVERIFY(sum == "20"_ba || sum == "10"_ba);
 }
 
 QTEST_MAIN(QtGrpcClientUnaryCallTest)