fix: capitalize first word in titleCase even if it is an exception word

[abhi-byte62]

Resolves #101

Summary

In standard title case conventions, the first word of a title is always capitalized, even if it is an article, preposition, or conjunction (such as 'in', 'and', 'the', 'a').

Previously, titleCase checked words against titleCaseExceptions regardless of their index, resulting in titleCase('in-world') returning 'in World' instead of 'In World'.

This change ensures that titleCaseExceptions is only evaluated when index > 0, so the first word is consistently capitalized.

Summary by CodeRabbit

• Bug Fixes
  • Title casing now recognizes spaces alongside configured punctuation when separating words in string inputs. Exception words are capitalized when they appear first and remain lowercase in later positions. Array inputs continue to use their supplied elements.

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📥 Commits

Reviewing files that changed from the base of the PR and between 8453778 and 6be606b.

📒 Files selected for processing (2)

• src/index.ts
• test/scule.test.ts

🚧 Files skipped from review as they are similar to previous changes (2)

• src/index.ts
• test/scule.test.ts

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📝 Walkthrough

Walkthrough

titleCase now splits string inputs on spaces and capitalizes an exception word when it appears first. Tests cover hyphenated, spaced, camelCase, and array inputs.

Changes

Title casing

Layer / File(s)	Summary
First-word exception handling src/index.ts, test/scule.test.ts	titleCase now splits string inputs on spaces and applies exception-word lowercasing only after the first word. Tests cover several input forms and exception words within titles.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Bug fix · Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to 6be60

First-word capitalization also works with a leading space. No actionable merge blocker is identified.

Architecture Summary

Architecture risk: 🔵 Low · up to 84537

The change affects 2 systems.

Changed systems: src, test

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — src (service) was modified; 1 changed file maps to changed impact.
• observed — test (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in src/index.ts: titleCase now checks the word index before lowercasing an exception, so a first-word exception follows the capitalization path instead.
• observed — Modified behavior in test/scule.test.ts: Added titleCase expectations for hyphenated and camel-case phrases, word arrays, and multiword titles with lowercase articles and conjunctions.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: capitalizing the first word in titleCase when it matches an exception word.
Linked Issues check	✅ Passed	Issue #101 requires initial exception words to use upper-first casing, including titleCase('in world') => In World and titleCase('and then') => And Then. src/index.ts adds space splitting fo…
Out of Scope Changes check	✅ Passed	The changes modify only titleCase splitting and first-word exception handling. The added tests verify the behavior required by issue #101. No unrelated changes are present in the reviewed diff.

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Warning

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🔧 ESLint

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src/index.ts

ESLint skipped: missing config or dependency (missing-dependency). The ESLint configuration references a package that is not available in the sandbox.

test/scule.test.ts

ESLint skipped: the matched ESLint configuration already failed (missing-dependency).

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Actionable comments posted: 1

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Inline comments:
Review comments at @src/index.ts:
- Around line 189-190: Update titleCase to split string inputs on literal spaces
in addition to the existing STR_SPLITTERS, so each word in inputs such as “in
world” is capitalized. Keep the updated splitting behavior local to titleCase;
leave other helpers’ splitting unchanged.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: c61e8bec-6767-403f-b84c-5dd8f359913e

📥 Commits

Reviewing files that changed from the base of the PR and between 5bc6804 and 8453778.

📒 Files selected for processing (2)

• src/index.ts
• test/scule.test.ts

Included review availability: This review used your included allowance. Your plan provides up to 4 included reviews per hour; 3 remain after this review.