Add explicit expect import and use public API imports in tests

- message-schema-validator.ts: import expect from @jest/globals
- OpenAIMessageContract.test.ts: import utils from package public API
  instead of relative src path
- index.ts: export buildStructuredInputMessages, buildStructuredOutputMessages,
  wrapRawContentAsInputMessages, wrapRawContentAsOutputMessages

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jsl517

packages/agents-a365-observability-extensions-openai/src/index.ts

@@ -8,6 +8,12 @@
 
 export { OpenAIAgentsTraceInstrumentor, OpenAIAgentsInstrumentationConfig } from './OpenAIAgentsTraceInstrumentor';
 export { OpenAIAgentsTraceProcessor } from './OpenAIAgentsTraceProcessor';
+export {
+  buildStructuredInputMessages,
+  buildStructuredOutputMessages,
+  wrapRawContentAsInputMessages,
+  wrapRawContentAsOutputMessages,
+} from './Utils';
 export {
   OpenAIObservabilityConfiguration,
   OpenAIObservabilityConfigurationOptions,

tests/observability/extension/helpers/message-schema-validator.ts

@@ -1,6 +1,8 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+import { expect } from '@jest/globals';
+
 function validateMessageEnvelope(value: unknown): Record<string, unknown> {
   // Attributes are stored as JSON strings; parse and validate the common envelope.
   expect(typeof value).toBe('string');

tests/observability/extension/openai/OpenAIMessageContract.test.ts

@@ -4,13 +4,13 @@
 import { describe, it, expect, beforeEach, afterEach } from '@jest/globals';
 import { Tracer, trace } from '@opentelemetry/api';
 import { OpenTelemetryConstants, ObservabilityManager, serializeMessages } from '@microsoft/agents-a365-observability';
-import { OpenAIAgentsTraceProcessor } from '@microsoft/agents-a365-observability-extensions-openai';
 import {
+  OpenAIAgentsTraceProcessor,
   buildStructuredInputMessages,
   buildStructuredOutputMessages,
   wrapRawContentAsInputMessages,
   wrapRawContentAsOutputMessages,
-} from '../../../../packages/agents-a365-observability-extensions-openai/src/Utils';
+} from '@microsoft/agents-a365-observability-extensions-openai';
 import { expectValidInputMessages, expectValidOutputMessages, getAttrFromArray } from '../helpers/message-schema-validator';
 
 describe('OpenAI Message Contract Tests', () => {