Add unit testing for GRPC only clients

composer.json

@@ -26,7 +26,8 @@
             "Testing\\DisableSnippets\\": "tests/Unit/ProtoTests/DisableSnippets/out/src",
             "Testing\\GrpcServiceConfig\\": "tests/Unit/ProtoTests/GrpcServiceConfig/out/src",
             "Testing\\ResourceNames\\": "tests/Unit/ProtoTests/ResourceNames/out/src",
-            "Testing\\RoutingHeaders\\": "tests/Unit/ProtoTests/RoutingHeaders/out/src"
+            "Testing\\RoutingHeaders\\": "tests/Unit/ProtoTests/RoutingHeaders/out/src",
+            "Testing\\BasicGrpcOnly\\": "tests/Unit/ProtoTests/BasicGrpcOnly/out/src"
         }
     },
     "require": {

rules_php_gapic/php_gapic.bzl

@@ -70,7 +70,7 @@ def php_gapic_srcjar(
     if transport == None:
         transport = "grpc+rest"
     if transport != "grpc+rest" and transport != "rest" and transport != "grpc":
-        fail("Error: Only 'grpc+rest' or 'rest' transports are supported")
+        fail("Error: Only 'grpc+rest', 'rest' or `grpc` transports are supported")
 
     # Set plugin arguments.
     plugin_args = ["metadata"]  # Generate the gapic_metadata.json file.

src/Utils/Transport.php

@@ -39,7 +39,7 @@ public static function parseTransport(?string $transport): int
             return static::REST;
         }
         if ($transport === "grpc") {
-            throw new \Exception("gRPC-only PHP clients are not supported at this time");
+            return static::GRPC;
         }
 
         throw new \Exception("Transport $transport not supported");

tests/Unit/ProtoTests/BasicGrpcOnly/basicGrpcOnly.proto

@@ -0,0 +1,53 @@
+syntax = "proto3";
+
+package testing.basicGrpcOnly;
+
+// php_namespace option not included; to test generating namespace from proto package.
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+
+// This is a basicGrpcOnly service.
+service BasicGrpcOnly {
+  option (google.api.default_host) = "basicGrpcOnly.example.com";
+  option (google.api.oauth_scopes) = "scope1,scope2";
+
+  // Test summary text for AMethod
+  rpc AMethod(Request) returns(Response) {
+    option (google.api.http) = {
+      post: "/path:aMethod"
+      body: "*"
+    };
+  }
+
+  // Test including method args.
+  rpc MethodWithArgs(RequestWithArgs) returns(Response) {
+    option (google.api.http) = {
+      post: "/path:methodWithArgs"
+      body: "*"
+    };
+  };
+}
+
+message Request {
+}
+
+message PartOfRequestA {}
+message PartOfRequestB {}
+message PartOfRequestC {}
+
+message RequestWithArgs {
+  // A required field...
+  string a_string = 1 [(google.api.field_behavior) = REQUIRED];
+  // ...and an optional field.
+  int32 an_int = 2;
+  // ...and a repeated message type, which checks that an extra import is *not* added,
+  // in contrast to a paginated method where an extra import *is* added.
+  repeated PartOfRequestA part_of_request_a = 4 [(google.api.field_behavior) = REQUIRED];
+  repeated PartOfRequestB part_of_request_b = 5;
+  PartOfRequestC part_of_request_c = 6;
+}
+
+message Response {
+}

tests/Unit/ProtoTests/BasicGrpcOnly/basic_grpc_only_service.yaml

@@ -0,0 +1,10 @@
+type: google.api.Service
+config_version: 3
+
+authentication:
+  rules:
+  - selector: 'testing.basicGrpcOnly.BasicGrpcOnly.*'
+    oauth:
+      canonical_scopes: |-
+        scope1,
+        scope2

tests/Unit/ProtoTests/BasicGrpcOnly/out/samples/BasicGrpcOnlyClient/a_method.php

@@ -0,0 +1,57 @@
+<?php
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * GENERATED CODE WARNING
+ * This file was automatically generated - do not edit!
+ */
+
+require_once __DIR__ . '/../../../vendor/autoload.php';
+
+// [START basicGrpcOnly_generated_BasicGrpcOnly_AMethod_sync]
+use Google\ApiCore\ApiException;
+use Testing\BasicGrpcOnly\Client\BasicGrpcOnlyClient;
+use Testing\BasicGrpcOnly\Request;
+use Testing\BasicGrpcOnly\Response;
+
+/**
+ * Test summary text for AMethod
+ *
+ * This sample has been automatically generated and should be regarded as a code
+ * template only. It will require modifications to work:
+ *  - It may require correct/in-range values for request initialization.
+ *  - It may require specifying regional endpoints when creating the service client,
+ *    please see the apiEndpoint client configuration option for more details.
+ */
+function a_method_sample(): void
+{
+    // Create a client.
+    $basicGrpcOnlyClient = new BasicGrpcOnlyClient();
+
+    // Prepare the request message.
+    $request = new Request();
+
+    // Call the API and handle any network failures.
+    try {
+        /** @var Response $response */
+        $response = $basicGrpcOnlyClient->aMethod($request);
+        printf('Response data: %s' . PHP_EOL, $response->serializeToJsonString());
+    } catch (ApiException $ex) {
+        printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
+    }
+}
+// [END basicGrpcOnly_generated_BasicGrpcOnly_AMethod_sync]

tests/Unit/ProtoTests/BasicGrpcOnly/out/samples/BasicGrpcOnlyClient/method_with_args.php

@@ -0,0 +1,73 @@
+<?php
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * GENERATED CODE WARNING
+ * This file was automatically generated - do not edit!
+ */
+
+require_once __DIR__ . '/../../../vendor/autoload.php';
+
+// [START basicGrpcOnly_generated_BasicGrpcOnly_MethodWithArgs_sync]
+use Google\ApiCore\ApiException;
+use Testing\BasicGrpcOnly\Client\BasicGrpcOnlyClient;
+use Testing\BasicGrpcOnly\PartOfRequestA;
+use Testing\BasicGrpcOnly\RequestWithArgs;
+use Testing\BasicGrpcOnly\Response;
+
+/**
+ * Test including method args.
+ *
+ * @param string $aString A required field...
+ */
+function method_with_args_sample(string $aString): void
+{
+    // Create a client.
+    $basicGrpcOnlyClient = new BasicGrpcOnlyClient();
+
+    // Prepare the request message.
+    $partOfRequestA = [new PartOfRequestA()];
+    $request = (new RequestWithArgs())
+        ->setAString($aString)
+        ->setPartOfRequestA($partOfRequestA);
+
+    // Call the API and handle any network failures.
+    try {
+        /** @var Response $response */
+        $response = $basicGrpcOnlyClient->methodWithArgs($request);
+        printf('Response data: %s' . PHP_EOL, $response->serializeToJsonString());
+    } catch (ApiException $ex) {
+        printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
+    }
+}
+
+/**
+ * Helper to execute the sample.
+ *
+ * This sample has been automatically generated and should be regarded as a code
+ * template only. It will require modifications to work:
+ *  - It may require correct/in-range values for request initialization.
+ *  - It may require specifying regional endpoints when creating the service client,
+ *    please see the apiEndpoint client configuration option for more details.
+ */
+function callSample(): void
+{
+    $aString = '[A_STRING]';
+
+    method_with_args_sample($aString);
+}
+// [END basicGrpcOnly_generated_BasicGrpcOnly_MethodWithArgs_sync]