GH#1289: fix: invalidate skipped cart initialization

[superdav42]

Summary

• Mark carts skipped by wu_cart_skip_initialization as invalid when the filter does not provide its own error.
• Preserve existing filter-provided errors and merge WP_Error filter responses.
• Add regression coverage for the true-return skip path.

Testing

• vendor/bin/phpcs inc/checkout/class-cart.php
• WP_TESTS_DIR=/tmp/wordpress-tests-lib vendor/bin/phpunit --filter test_cart_constructor_sets_default_error_when_skip_filter_returns_true

Resolves #1289

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aidevops.sh v3.19.5 plugin for OpenCode v1.15.10 with gpt-5.5 spent 5m and 131,290 tokens on this as a headless worker.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ab4323c3-b398-4f37-81f4-6a9b2a7e7273

📥 Commits

Reviewing files that changed from the base of the PR and between 4a3f5a6 and 1206762.

📒 Files selected for processing (2)

• inc/checkout/class-cart.php
• tests/WP_Ultimo/Checkout/Checkout_Test.php

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/auto-20260526-235228-gh1289

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[superdav42]

MERGE_SUMMARY

Summary

• Mark carts skipped by wu_cart_skip_initialization as invalid when no filter-provided error exists.
• Preserve existing cart errors and merge WP_Error skip-filter responses.
• Added regression coverage for skipped initialization returning true.

Files changed

• inc/checkout/class-cart.php
• tests/WP_Ultimo/Checkout/Checkout_Test.php

Testing

• vendor/bin/phpcs inc/checkout/class-cart.php
• WP_TESTS_DIR=/tmp/wordpress-tests-lib vendor/bin/phpunit --filter test_cart_constructor_sets_default_error_when_skip_filter_returns_true

---

aidevops.sh v3.19.5 plugin for OpenCode v1.15.10 with gpt-5.5 spent 5m and 131,860 tokens on this as a headless worker.

[superdav42]

Summary

• Mark carts skipped by wu_cart_skip_initialization as invalid when the filter does not provide its own error.
• Preserve existing filter-provided errors and merge WP_Error filter responses.
• Add regression coverage for the true-return skip path.

Testing

• vendor/bin/phpcs inc/checkout/class-cart.php
• WP_TESTS_DIR=/tmp/wordpress-tests-lib vendor/bin/phpunit --filter test_cart_constructor_sets_default_error_when_skip_filter_returns_true

---

aidevops.sh v3.19.5 plugin for OpenCode v1.15.10 with gpt-5.5 spent 5m and 131,290 tokens on this as a headless worker.

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Merged via PR #1292 to main.
Merged by deterministic merge pass (pulse-wrapper.sh).

[github-actions]

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[github-actions]

Performance Test Results

Performance test results for aad4dd6 are in 🛎️!

Note: the numbers in parentheses show the difference to the previous (baseline) test run. Differences below 2% or 0.5 in absolute values are not shown.

URL: /

Run	DB Queries	Memory	Before Template	Template	WP Total	LCP	TTFB	LCP - TTFB
0	41	37.78 MB	932.50 ms (+99.00 ms / +11% )	162.50 ms	1094.50 ms (+80.50 ms / +7% )	1970.00 ms	1895.50 ms	77.90 ms (-2.30 ms / -3% )
1	56	49.13 MB	865.50 ms (-80.50 ms / -9% )	139.00 ms (-6.50 ms / -5% )	1004.00 ms (-87.50 ms / -9% )	1982.00 ms (-96.00 ms / -5% )	1909.90 ms (-95.00 ms / -5% )	72.80 ms