Complete onboarding exercises

src/__test__/onboarding/auleenadas/01-algorithm.test.ts

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+/**
+ * Exercise 1 test scaffold.
+ *
+ * Full instructions: ../../../docs/exercises/01-algorithms-and-testing.md
+ */
+
+import { describe, it, expect } from 'vitest';
+
+import { mergeSortedNumbers } from '../../../onboarding/auleenadas/01-algorithm.ts';
+
+/**
+ * Exercise 1 tests for auleenadas.
+ */
+describe('mergeSortedNumbers', () => {
+  it('merges values from both arrays in ascending order', () => {
+    const result = mergeSortedNumbers([1, 3, 5], [2, 4, 6]);
+    expect(result).toEqual([1, 2, 3, 4, 5, 6]);
+  });
+
+  it('returns a new array instead of mutating either input', () => {
+    const left = [1, 3];
+    const right = [2, 4];
+    const result = mergeSortedNumbers(left, right);
+
+    expect(result).toEqual([1, 2, 3, 4]);
+    expect(left).toEqual([1, 3]); // unchanged
+    expect(right).toEqual([2, 4]); // unchanged
+  });
+
+  it('handles one empty array', () => {
+    expect(mergeSortedNumbers([], [1, 2, 3])).toEqual([1, 2, 3]);
+    expect(mergeSortedNumbers([1, 2, 3], [])).toEqual([1, 2, 3]);
+  });
+});

src/onboarding/auleenadas/01-algorithm.ts

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+/**
+ * Exercise: Algorithm and testing
+ * Developer: auleenadas
+ * Instructions: ../../../docs/exercises/01-algorithms-and-testing.md
+ */
+
+/**
+ * Exercise 1: auleenadas must implement a small algorithm and add tests for it.
+ *
+ * Goal: merge two sorted arrays into a new sorted array without mutating either input.
+ */
+
+/**
+ * Combines two ascending arrays into one ascending array.
+ *
+ * @param left The first sorted list.
+ * @param right The second sorted list.
+ * @returns A new sorted list containing the values from both inputs.
+ */
+export function mergeSortedNumbers(left: number[], right: number[]): number[] {
+  const result: number[] = [];
+  let i = 0; // pointer for left
+  let j = 0; // pointer for right
+
+  while (i < left.length && j < right.length) {
+    if (left[i] <= right[j]) {
+      result.push(left[i]);
+      i++;
+    } else {
+      result.push(right[j]);
+      j++;
+    }
+  }
+
+  // one array may have leftover elements — add them all
+  while (i < left.length) {
+    result.push(left[i]);
+    i++;
+  }
+  while (j < right.length) {
+    result.push(right[j]);
+    j++;
+  }
+
+  return result;
+}

src/onboarding/auleenadas/02-tsdoc.ts

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+/**
+ * Exercise: TSDoc
+ * Developer: auleenadas
+ * Instructions: ../../../docs/exercises/02-writing-tsdoc-comments.md
+ */
+
+// Exercise 2: replace the placeholder TSDoc with complete documentation.
+
+/**
+ * Formats a person's first and last name into a single display string,
+ * with the last name listed first, followed by the first name.
+ *
+ * @param firstName The person's first name.
+ * @param lastName The person's last name.
+ * @returns The formatted full name in "lastName, firstName" order.
+ */
+
+export function formatFullName(firstName: string, lastName: string): string {
+  return `${lastName}, ${firstName}`;
+}

src/onboarding/auleenadas/03-type-errors.ts

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+/**
+ * Exercise: Type errors
+ * Developer: auleenadas
+ * Instructions: ../../../docs/exercises/03-fixing-type-errors.md
+ */
+
+/**
+ * Exercise 3: fix the type errors in this file without changing the overall behavior.
+ */
+
+type TeamMember = {
+  name: string;
+  commits: number;
+};
+
+/**
+ * Formats a team activity summary.
+ *
+ * @param member The team member to summarize.
+ * @returns A human-readable summary string.
+ */
+export function formatTeamSummary(member: TeamMember): string {
+  return `${member.name} pushed ${member.commits} commits this week.`;
+}
+
+const newestMember: TeamMember = {
+  name: 'Avery',
+
+  commits: 5,
+};
+
+formatTeamSummary(newestMember);

src/onboarding/auleenadas/04-lint.ts

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+/**
+ * Exercise: Lint
+ * Developer: auleenadas
+ * Instructions: ../../../docs/exercises/04-fixing-linting-issues.md
+ */
+
+/**
+ * Exercise 4: clean up the lint issues in this file.
+ */
+
+/**
+ * Normalizes a repository name.
+ *
+ * @param repositoryName The raw repository name.
+ * @returns The normalized repository name.
+ */
+export function normalizeRepositoryName(repositoryName: string): string {
+  const metadata: { source: string } = { source: 'manual' };
+
+  return repositoryName.trim().toLowerCase() + metadata.source.slice(0, 0);
+}

src/onboarding/auleenadas/05-formatting.ts

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+/**
+ * Exercise: Formatting
+ * Developer: auleenadas
+ * Instructions: ../../../docs/exercises/05-fixing-formatting.md
+ */
+
+/**
+ * Exercise 5: reformat this file so it matches the project's normal style.
+ */
+
+/**
+ * Sorts team names alphabetically.
+ *
+ * @param teams The names to sort.
+ * @returns A new sorted array.
+ */
+export function sortTeams(teams: string[]): string[] {
+  return [...teams].sort((left, right) => left.localeCompare(right));
+}