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test: add comprehensive tests for ProtoUtils To/FromProto conversions #1205

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327 changes: 327 additions & 0 deletions spec-grpc/src/test/java/org/a2aproject/sdk/grpc/utils/ProtoUtilsTest.java
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package org.a2aproject.sdk.grpc.utils;

import static org.a2aproject.sdk.grpc.Role.ROLE_USER;

@ehsavoie ehsavoie Oct 29, 2026

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Is this one used ?

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.a2aproject.sdk.grpc.SendMessageResponse;
import org.a2aproject.sdk.grpc.StreamResponse;
import org.a2aproject.sdk.spec.AgentCapabilities;
import org.a2aproject.sdk.spec.AgentCard;
import org.a2aproject.sdk.spec.AgentInterface;
import org.a2aproject.sdk.spec.AgentSkill;
import org.a2aproject.sdk.spec.Artifact;
import org.a2aproject.sdk.spec.CancelTaskParams;
import org.a2aproject.sdk.spec.GetExtendedAgentCardParams;
import org.a2aproject.sdk.spec.GetTaskPushNotificationConfigParams;
import org.a2aproject.sdk.spec.InvalidParamsError;
import org.a2aproject.sdk.spec.ListTaskPushNotificationConfigsParams;
import org.a2aproject.sdk.spec.ListTaskPushNotificationConfigsResult;
import org.a2aproject.sdk.spec.ListTasksParams;
import org.a2aproject.sdk.spec.Message;
import org.a2aproject.sdk.spec.MessageSendConfiguration;
import org.a2aproject.sdk.spec.MessageSendParams;
import org.a2aproject.sdk.spec.StreamingEventKind;
import org.a2aproject.sdk.spec.Task;
import org.a2aproject.sdk.spec.TaskArtifactUpdateEvent;
import org.a2aproject.sdk.spec.TaskIdParams;
import org.a2aproject.sdk.spec.TaskPushNotificationConfig;
import org.a2aproject.sdk.spec.TaskQueryParams;
import org.a2aproject.sdk.spec.TaskState;
import org.a2aproject.sdk.spec.TaskStatus;
import org.a2aproject.sdk.spec.TaskStatusUpdateEvent;
import org.a2aproject.sdk.spec.TextPart;
import org.a2aproject.sdk.jsonrpc.common.wrappers.ListTasksResult;
import org.junit.jupiter.api.Test;

/**
* Additional coverage for {@link ProtoUtils}, complementing {@link ToProtoTest}: the
* streaming/oneof conversions and the {@link ProtoUtils.FromProto} direction, including
* round-trip conversions for the request and response wrappers.
*/
public class ProtoUtilsTest {

private static final Message SIMPLE_MESSAGE = Message.builder()
.role(Message.Role.ROLE_USER)
.parts(Collections.singletonList(new TextPart("tell me a joke", Map.of())))
.contextId("context-1234")
.messageId("message-1234")
.metadata(Map.of())
.build();

private static final Task SIMPLE_TASK = Task.builder()
.id("task-1")
.contextId("ctx-1")
.status(new TaskStatus(TaskState.TASK_STATE_WORKING))
.metadata(Map.of())
.build();

@Test
public void streamResponseWithTask() {
StreamResponse response = ProtoUtils.ToProto.streamResponse(SIMPLE_TASK);
assertTrue(response.hasTask());
assertEquals("task-1", response.getTask().getId());

StreamingEventKind converted = ProtoUtils.FromProto.streamingEventKind(response);
assertTrue(converted instanceof Task);
assertEquals(SIMPLE_TASK, converted);
}

@Test
public void streamResponseWithMessage() {
StreamResponse response = ProtoUtils.ToProto.streamResponse(SIMPLE_MESSAGE);
assertTrue(response.hasMessage());
assertEquals("message-1234", response.getMessage().getMessageId());

StreamingEventKind converted = ProtoUtils.FromProto.streamingEventKind(response);
assertTrue(converted instanceof Message);
assertEquals(SIMPLE_MESSAGE, converted);
}

@Test
public void streamResponseWithStatusUpdate() {
TaskStatusUpdateEvent event = new TaskStatusUpdateEvent(
"task-1",
new TaskStatus(TaskState.TASK_STATE_WORKING),
"ctx-1",
null);
StreamResponse response = ProtoUtils.ToProto.streamResponse(event);
assertTrue(response.hasStatusUpdate());
assertEquals("task-1", response.getStatusUpdate().getTaskId());
assertEquals("ctx-1", response.getStatusUpdate().getContextId());
assertEquals(org.a2aproject.sdk.grpc.TaskState.TASK_STATE_WORKING,
response.getStatusUpdate().getStatus().getState());

StreamingEventKind converted = ProtoUtils.FromProto.streamingEventKind(response);
assertTrue(converted instanceof TaskStatusUpdateEvent);
assertEquals("task-1", ((TaskStatusUpdateEvent) converted).taskId());
assertEquals(TaskState.TASK_STATE_WORKING, ((TaskStatusUpdateEvent) converted).status().state());
assertEquals("ctx-1", ((TaskStatusUpdateEvent) converted).contextId());
}

@Test
public void streamResponseWithArtifactUpdate() {
TaskArtifactUpdateEvent event = TaskArtifactUpdateEvent.builder()
.taskId("task-1")
.contextId("ctx-1")
.artifact(Artifact.builder()
.artifactId("artifact-1")
.parts(new TextPart("text", Map.of()))
.build())
.build();
StreamResponse response = ProtoUtils.ToProto.streamResponse(event);
assertTrue(response.hasArtifactUpdate());
assertEquals("task-1", response.getArtifactUpdate().getTaskId());
assertEquals("artifact-1", response.getArtifactUpdate().getArtifact().getArtifactId());

StreamingEventKind converted = ProtoUtils.FromProto.streamingEventKind(response);
assertTrue(converted instanceof TaskArtifactUpdateEvent);
assertEquals("task-1", ((TaskArtifactUpdateEvent) converted).taskId());
assertEquals("ctx-1", ((TaskArtifactUpdateEvent) converted).contextId());
assertEquals("artifact-1", ((TaskArtifactUpdateEvent) converted).artifact().artifactId());
}

@Test
public void taskOrMessageWithTask() {
SendMessageResponse response = ProtoUtils.ToProto.taskOrMessage(SIMPLE_TASK);
assertTrue(response.hasTask());
assertEquals("task-1", response.getTask().getId());
assertEquals(SIMPLE_TASK, ProtoUtils.FromProto.task(response.getTask()));
}

@Test
public void taskOrMessageWithMessage() {
SendMessageResponse response = ProtoUtils.ToProto.taskOrMessage(SIMPLE_MESSAGE);
assertTrue(response.hasMessage());
assertEquals("message-1234", response.getMessage().getMessageId());
assertEquals(SIMPLE_MESSAGE, ProtoUtils.FromProto.message(response.getMessage()));
}

@Test
public void getTaskRequestRoundTrip() {
TaskQueryParams params = new TaskQueryParams("task-123", 5, "tenant-1");
org.a2aproject.sdk.grpc.GetTaskRequest request = ProtoUtils.ToProto.getTaskRequest(params);
assertEquals("task-123", request.getId());
assertEquals(params, ProtoUtils.FromProto.taskQueryParams(request));
}

@Test
public void cancelTaskRequestRoundTrip() {
CancelTaskParams params = new CancelTaskParams("task-123", "tenant-1", Map.of("key", "value"));
org.a2aproject.sdk.grpc.CancelTaskRequest request = ProtoUtils.ToProto.cancelTaskRequest(params);
assertEquals("task-123", request.getId());
assertEquals(params, ProtoUtils.FromProto.cancelTaskParams(request));
}

@Test
public void subscribeToTaskRequestRoundTrip() {
TaskIdParams params = new TaskIdParams("task-123", "tenant-1");
org.a2aproject.sdk.grpc.SubscribeToTaskRequest request = ProtoUtils.ToProto.subscribeToTaskRequest(params);
assertEquals("task-123", request.getId());
assertEquals(params, ProtoUtils.FromProto.taskIdParams(request));
}

@Test
public void sendMessageRequestRoundTrip() {
MessageSendConfiguration configuration = MessageSendConfiguration.builder()
.acceptedOutputModes(List.of("text"))
.returnImmediately(true)
.build();
MessageSendParams params = new MessageSendParams(
SIMPLE_MESSAGE, configuration, Map.of("key", "value"), "tenant-1");
org.a2aproject.sdk.grpc.SendMessageRequest request = ProtoUtils.ToProto.sendMessageRequest(params);

assertEquals("message-1234", request.getMessage().getMessageId());
assertEquals(params, ProtoUtils.FromProto.messageSendParams(request));
}

@Test
public void getTaskPushNotificationConfigRequestRoundTrip() {
GetTaskPushNotificationConfigParams params = new GetTaskPushNotificationConfigParams(
"task-123", "config-456", "tenant-1");
org.a2aproject.sdk.grpc.GetTaskPushNotificationConfigRequest request =
ProtoUtils.ToProto.getTaskPushNotificationConfigRequest(params);
assertEquals("task-123", request.getTaskId());
assertEquals(params, ProtoUtils.FromProto.getTaskPushNotificationConfigParams(request));
}

@Test
public void listTaskPushNotificationConfigsRequestRoundTrip() {
ListTaskPushNotificationConfigsParams params = new ListTaskPushNotificationConfigsParams(
"task-123", 10, "token-1", "tenant-1");
org.a2aproject.sdk.grpc.ListTaskPushNotificationConfigsRequest request =
ProtoUtils.ToProto.listTaskPushNotificationConfigsRequest(params);
assertEquals("task-123", request.getTaskId());
assertEquals(params, ProtoUtils.FromProto.listTaskPushNotificationConfigsParams(request));
}

@Test
public void listTaskPushNotificationConfigsResultRoundTrip() {
TaskPushNotificationConfig config = TaskPushNotificationConfig.builder()
.id("config-1")
.taskId("task-1")
.url("http://example.com")
.build();
ListTaskPushNotificationConfigsResult result = new ListTaskPushNotificationConfigsResult(
List.of(config), "next-token-1");

org.a2aproject.sdk.grpc.ListTaskPushNotificationConfigsResponse response =
ProtoUtils.ToProto.listTaskPushNotificationConfigsResponse(result);
assertEquals(1, response.getConfigsCount());
assertEquals("next-token-1", response.getNextPageToken());
assertEquals(result, ProtoUtils.FromProto.listTaskPushNotificationConfigsResult(response));
}

@Test
public void listTaskPushNotificationConfigsResultEmptyPageTokenBecomesNull() {
ListTaskPushNotificationConfigsResult result = new ListTaskPushNotificationConfigsResult(
List.of(), null);

org.a2aproject.sdk.grpc.ListTaskPushNotificationConfigsResponse response =
ProtoUtils.ToProto.listTaskPushNotificationConfigsResponse(result);

// The proto default for an unset string is the empty string; the spec convention is null
assertNull(ProtoUtils.FromProto.listTaskPushNotificationConfigsResult(response).nextPageToken());
}

@Test
public void listTasksResultRoundTrip() {
ListTasksResult result = new ListTasksResult(List.of(SIMPLE_TASK), 3, 1, "next-token-1");

org.a2aproject.sdk.grpc.ListTasksResponse response = ProtoUtils.ToProto.listTasksResult(result);
assertEquals(1, response.getTasksCount());
assertEquals(3, response.getTotalSize());
assertEquals(1, response.getPageSize());
assertEquals("next-token-1", response.getNextPageToken());
assertEquals(result, ProtoUtils.FromProto.listTasksResult(response));
}

@Test
public void listTasksParamsRoundTrip() {
ListTasksParams params = new ListTasksParams(
"ctx-1", TaskState.TASK_STATE_WORKING, 10, "token-1", 5, null, true, "tenant-1");
org.a2aproject.sdk.grpc.ListTasksRequest request = ProtoUtils.ToProto.listTasksParams(params);
assertEquals("ctx-1", request.getContextId());
assertEquals(params, ProtoUtils.FromProto.listTasksParams(request));
}

@Test
public void getExtendedAgentCardParamsNormalizesEmptyTenantToNull() {
GetExtendedAgentCardParams params = ProtoUtils.FromProto.getExtendedAgentCardParams(
org.a2aproject.sdk.grpc.GetExtendedAgentCardRequest.getDefaultInstance());
assertNull(params.tenant());

params = ProtoUtils.FromProto.getExtendedAgentCardParams(
org.a2aproject.sdk.grpc.GetExtendedAgentCardRequest.newBuilder().setTenant("tenant-1").build());
assertEquals(new GetExtendedAgentCardParams("tenant-1"), params);
}

@Test
public void fromProtoMessageRequiresMessageId() {
assertThrows(InvalidParamsError.class,
() -> ProtoUtils.FromProto.message(org.a2aproject.sdk.grpc.Message.getDefaultInstance()));
}

@Test
public void agentCardRoundTrip() {
// Collections are built with canonical empty values: the converters normalize absent
// collections and maps to their empty forms when converting back from proto
AgentCard agentCard = AgentCard.builder()
.name("Hello World Agent")
.description("Just a hello world agent")
.supportedInterfaces(Collections.singletonList(new AgentInterface("jsonrpc", "http://localhost:9999")))
.version("1.0.0")
.documentationUrl("http://example.com/docs")
.capabilities(AgentCapabilities.builder()
.streaming(true)
.pushNotifications(true)
.extensions(List.of())
.build())
.defaultInputModes(List.of("text", "application/json"))
.defaultOutputModes(List.of("text"))
.skills(List.of(AgentSkill.builder()
.id("hello_world")
.name("Returns hello world")
.description("just returns hello world")
.tags(List.of("hello world"))
.examples(List.of("hi", "hello world"))
.inputModes(List.of())
.outputModes(List.of())
.securityRequirements(List.of())
.build()))
.securitySchemes(Map.of())
.securityRequirements(List.of())
.signatures(List.of())
.build();

org.a2aproject.sdk.grpc.AgentCard protoCard = ProtoUtils.ToProto.agentCard(agentCard);
assertEquals(agentCard, ProtoUtils.FromProto.agentCard(protoCard));
}

@Test
public void taskRoundTripWithArtifactsAndHistory() {
Task task = Task.builder()
.id("task-1")
.contextId("ctx-1")
.status(new TaskStatus(TaskState.TASK_STATE_COMPLETED,
SIMPLE_MESSAGE, java.time.OffsetDateTime.parse("2026-09-21T00:00:00Z")))
.artifacts(List.of(Artifact.builder()
.artifactId("artifact-1")
.name("artifact")
.parts(new TextPart("text", Map.of()))
.metadata(Map.of())
.build()))
.history(List.of(SIMPLE_MESSAGE))
.metadata(Map.of("key", "value"))
.build();

org.a2aproject.sdk.grpc.Task protoTask = ProtoUtils.ToProto.task(task);
assertEquals(task, ProtoUtils.FromProto.task(protoTask));
}
}
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