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fix: correct error handling for unknown tools and resources (#1389)

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Co-authored-by: Felix Weinberger <3823880+felixweinberger@users.noreply.github.com>
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Anthony 2026-03-09 19:17:09 +01:00 • committed by GitHub
commit 108f2f3ab6
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1 changed files with 123 additions and 23 deletions
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110
test/integration/test/server/mcp.test.ts
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@ -1777,22 +1777,59 @@ describe('Zod v4', () => {
await Promise.all([client.connect(clientTransport), mcpServer.server.connect(serverTransport)]);
const result = await client.request({
method: 'tools/call',
params: {
name: 'nonexistent-tool'
}
await expect(
client.request({
method: 'tools/call',
params: {
name: 'nonexistent-tool'
}
})
).rejects.toMatchObject({
code: ProtocolErrorCode.InvalidParams,
message: expect.stringContaining('nonexistent-tool')
});
});
/***
* Test: ProtocolError for Disabled Tool
*/
test('should throw ProtocolError for disabled tool', async () => {
const mcpServer = new McpServer({
name: 'test server',
version: '1.0'
});
expect(result.isError).toBe(true);
expect(result.content).toEqual(
expect.arrayContaining([
const client = new Client({
name: 'test client',
version: '1.0'
});
const tool = mcpServer.registerTool('test-tool', {}, async () => ({
content: [
{
type: 'text',
text: expect.stringContaining('Tool nonexistent-tool not found')
text: 'Test response'
}
])
);
]
}));
tool.disable();
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
await Promise.all([client.connect(clientTransport), mcpServer.server.connect(serverTransport)]);
await expect(
client.request({
method: 'tools/call',
params: {
name: 'test-tool'
}
})
).rejects.toMatchObject({
code: ProtocolErrorCode.InvalidParams,
message: expect.stringContaining('disabled')
});
});
/***
@ -2797,7 +2834,51 @@ describe('Zod v4', () => {
uri: 'test://nonexistent'
}
})
).rejects.toThrow(/Resource test:\/\/nonexistent not found/);
).rejects.toMatchObject({
code: ProtocolErrorCode.ResourceNotFound,
message: expect.stringContaining('not found')
});
});
/***
* Test: ProtocolError for Disabled Resource
*/
test('should throw ProtocolError for disabled resource', async () => {
const mcpServer = new McpServer({
name: 'test server',
version: '1.0'
});
const client = new Client({
name: 'test client',
version: '1.0'
});
const resource = mcpServer.registerResource('test', 'test://resource', {}, async () => ({
contents: [
{
uri: 'test://resource',
text: 'Test content'
}
]
}));
resource.disable();
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
await Promise.all([client.connect(clientTransport), mcpServer.server.connect(serverTransport)]);
await expect(
client.request({
method: 'resources/read',
params: {
uri: 'test://resource'
}
})
).rejects.toMatchObject({
code: ProtocolErrorCode.InvalidParams,
message: expect.stringContaining('disabled')
});
});
/***
@ -3693,7 +3774,10 @@ describe('Zod v4', () => {
name: 'nonexistent-prompt'
}
})
).rejects.toThrow(/Prompt nonexistent-prompt not found/);
).rejects.toMatchObject({
code: ProtocolErrorCode.InvalidParams,
message: expect.stringContaining('not found')
});
});
/***