Authoring Themis Tests for a Document Processing Service

Problem/Feature Description

Harlow Data has a TypeScript document processing service that the team wants to cover with Themis tests. The service has two main modules: a DocumentParser class that coordinates the multi-step parsing pipeline (ingestion → normalization → extraction → enrichment), and a normalizeText pure utility function that strips whitespace and lowercases strings.

A new engineer on the team has been asked to hand-author Themis tests for both modules. They've been told that Themis has different constructs for different kinds of tests, and that TypeScript files need a specific setup to get global type access. They need example test files that demonstrate proper, idiomatic Themis TypeScript test authoring so the team has a template to follow.

Output Specification

Produce the following files:

• __themis__/tests/document-parser.test.ts — A Themis test file for the DocumentParser pipeline, covering the multi-step processing workflow. Use a realistic but simple test scenario (you can import from a hypothetical ../../src/document-parser path).
• __themis__/tests/normalize-text.test.ts — A Themis test file for the normalizeText pure utility function.
• AUTHORING_NOTES.md — A short document explaining the two types of Themis test constructs, when each should be used, and what the first line of a Themis TypeScript test file should look like and why.

Input Files

The following files represent the source code to be tested. Extract them before beginning.

=============== FILE: src/document-parser.ts =============== export interface ParseResult { id: string; content: string; metadata: Record<string, string>; }

export class DocumentParser { async parse(raw: string): Promise<ParseResult> { const ingested = await this.ingest(raw); const normalized = await this.normalize(ingested); const extracted = await this.extract(normalized); return this.enrich(extracted); }

private async ingest(raw: string): Promise<string> { return raw.trim(); }

private async normalize(text: string): Promise<string> { return text.toLowerCase(); }

private async extract(text: string): Promise<{ content: string }> { return { content: text }; }

private async enrich(data: { content: string }): Promise<ParseResult> { return { id: doc-${Date.now()}, content: data.content, metadata: { source: "manual" }, }; } }

=============== FILE: src/normalize-text.ts =============== export function normalizeText(input: string): string { return input.replace(/\s+/g, " ").trim().toLowerCase(); }