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/**
* Exercise 8: Simulate a Complete Tool Call Flow
*
* Goal: Build a complete agent conversation with tool calls
*
* Requirements:
* - Simulate a realistic agent conversation
* - Include system message, user query, AI tool decision
* - Execute a mock tool and return results
* - AI processes results and responds
* - Handle multiple tool calls in sequence
*
* Example Flow:
* 1. System: "You are helpful"
* 2. Human: "What's 5*3?"
* 3. AI: [Decides to use calculator tool]
* 4. Tool: [Returns 15]
* 5. AI: "5*3 = 15"
*/
import { HumanMessage, AIMessage, SystemMessage, ToolMessage } from '../../../../src/index.js';
/**
* Mock Calculator Tool
* Simulates a real tool that an agent would call
*/
class Calculator {
constructor() {
this.name = 'calculator';
}
/**
* Execute a calculation
*/
execute(operation, a, b) {
const ops = {
'add': (x, y) => x + y,
'subtract': (x, y) => x - y,
'multiply': (x, y) => x * y,
'divide': (x, y) => x / y
};
if (!ops[operation]) {
throw new Error(`Unknown operation: ${operation}`);
}
return ops[operation](a, b);
}
/**
* Get tool definition for LLM
*/
getDefinition() {
return {
name: 'calculator',
description: 'Performs basic arithmetic operations',
parameters: {
type: 'object',
properties: {
operation: {
type: 'string',
enum: ['add', 'subtract', 'multiply', 'divide'],
description: 'The operation to perform'
},
a: { type: 'number', description: 'First number' },
b: { type: 'number', description: 'Second number' }
},
required: ['operation', 'a', 'b']
}
};
}
}
/**
* TODO: Implement simulateToolCallFlow
*
* Simulates a complete tool call conversation:
* 1. System sets context
* 2. Human asks a question
* 3. AI decides to use a tool
* 4. Tool executes and returns result
* 5. AI incorporates result and responds
*
* @param {string} userQuery - The user's question
* @returns {Array<BaseMessage>} Complete conversation
*/
function simulateToolCallFlow(userQuery) {
const messages = [];
// TODO: Add system message
// TODO: Add human message with query
// TODO: Create AI message with tool call
// TODO: Execute the tool (mock)
// TODO: Add tool message with result
// TODO: Add final AI message with answer
return messages;
}
/**
* TODO: Implement simulateMultiToolFlow
*
* Simulates a conversation requiring multiple tool calls
*
* Example: "What's 5*3 and then add 10 to the result?"
* - First tool call: multiply 5*3 = 15
* - Second tool call: add 15+10 = 25
* - Final answer: "The result is 25"
*/
function simulateMultiToolFlow(userQuery) {
const messages = [];
// TODO: Implement multi-step tool calling
// TODO: First calculation
// TODO: Use result in second calculation
// TODO: Final answer
return messages;
}
/**
* TODO: Implement displayConversation
*
* Pretty-print a conversation with tool calls highlighted
*/
function displayConversation(messages) {
// TODO: Format each message
// TODO: Highlight tool calls specially
// TODO: Show tool call/result connections
}
// ============================================================================
// Tests
// ============================================================================
async function runTests() {
console.log('🧪 Testing Tool Call Flow...\n');
try {
// Test 1: Simple tool call
console.log('Test 1: Simple calculation with tool');
const conversation1 = simulateToolCallFlow("What's 5 * 3?");
console.log(` Messages created: ${conversation1.length}`);
console.assert(conversation1.length >= 5, 'Should have at least 5 messages');
// Check message types in order
console.assert(conversation1[0].type === 'system', 'Should start with system');
console.assert(conversation1[1].type === 'human', 'Should have human query');
console.assert(conversation1[2].type === 'ai', 'Should have AI decision');
console.assert(conversation1[3].type === 'tool', 'Should have tool result');
console.assert(conversation1[4].type === 'ai', 'Should have final AI response');
// Check AI message has tool calls
const aiWithTool = conversation1[2];
console.assert(aiWithTool.hasToolCalls(), 'AI message should have tool calls');
console.log('\n Conversation:');
displayConversation(conversation1);
console.log('\n✅ Simple tool call works\n');
// Test 2: Multi-step tool calls
console.log('Test 2: Multi-step calculation');
const conversation2 = simulateMultiToolFlow("What's 5*3 and then add 10?");
console.log(` Messages created: ${conversation2.length}`);
// Should have multiple tool calls
const toolMessages = conversation2.filter(m => m.type === 'tool');
console.log(` Tool calls made: ${toolMessages.length}`);
console.assert(toolMessages.length >= 2, 'Should have at least 2 tool calls');
console.log('\n Conversation:');
displayConversation(conversation2);
console.log('\n✅ Multi-step tool calls work\n');
// Test 3: Tool call ID linking
console.log('Test 3: Tool call IDs match');
const testConv = simulateToolCallFlow("Calculate 10 + 5");
// Find AI message with tool call
const aiMsg = testConv.find(m => m.type === 'ai' && m.hasToolCalls());
const toolMsg = testConv.find(m => m.type === 'tool');
console.assert(aiMsg, 'Should have AI message with tool call');
console.assert(toolMsg, 'Should have tool message');
const toolCallId = aiMsg.toolCalls[0].id;
console.log(` Tool call ID: ${toolCallId}`);
console.log(` Tool message references: ${toolMsg.toolCallId}`);
console.assert(toolCallId === toolMsg.toolCallId, 'IDs should match');
console.log('✅ Tool call IDs link correctly\n');
// Test 4: Calculator tool
console.log('Test 4: Calculator tool execution');
const calc = new Calculator();
const result1 = calc.execute('multiply', 5, 3);
const result2 = calc.execute('add', 10, 5);
const result3 = calc.execute('divide', 20, 4);
console.log(` 5 * 3 = ${result1}`);
console.log(` 10 + 5 = ${result2}`);
console.log(` 20 / 4 = ${result3}`);
console.assert(result1 === 15, 'Multiplication should work');
console.assert(result2 === 15, 'Addition should work');
console.assert(result3 === 5, 'Division should work');
console.log('✅ Calculator works\n');
// Test 5: Tool definition
console.log('Test 5: Tool definition format');
const calc5 = new Calculator();
const definition = calc5.getDefinition();
console.log(` Tool name: ${definition.name}`);
console.log(` Parameters: ${Object.keys(definition.parameters.properties).join(', ')}`);
console.assert(definition.name === 'calculator', 'Should have name');
console.assert(definition.parameters, 'Should have parameters');
console.log('✅ Tool definition is correct\n');
console.log('🎉 All tests passed!');
} catch (error) {
console.error('❌ Test failed:', error.message);
console.error(error.stack);
}
}
// Run tests
if (import.meta.url === `file://${process.argv[1]}`) {
runTests();
}
export { Calculator, simulateToolCallFlow, simulateMultiToolFlow, displayConversation }; |