Update two integration tests relating to git functionality

[gudmdharalds]

Update two integration tests, providing additional testing coverage for git related functionality. Tests against possible later regression. Relates to work in #264.

• Update test integration/GitRepoRepoGetFileAtCommitTest.php (for vipgoci_gitrepo_get_file_at_commit()).
  • Add test for empty file.
  • Add test for non-existing file.
• Update test integration/GitRepoRepoBlameForFileTest.php (for vipgoci_gitrepo_blame_for_file()).
  • Add test for empty file.
• Check automated unit-tests
• Changelog entry (for VIP) [ Changelog for version 1.2.3 #262 ]

[wpcomvip-vipgoci-bot]

No issues were found to report when scanning latest commit (commit-ID: fe22d3d)

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Scan run detail

Software versions vip-go-ci version: 1.2.2 PHP runtime version for vip-go-ci: 8.1.4 PHP runtime for linting: PHP 8.1: 8.1.4 PHP runtime version for PHPCS: 7.4.28 PHPCS version: 3.6.2 PHP runtime version for SVG scanner: 7.4.28 Options file (.vipgoci_options) Options file enabled: true Configurable options: skip-execution skip-draft-prs lint-modified-files-only phpcs phpcs-severity phpcs-sniffs-include phpcs-sniffs-exclude report-no-issues-found review-comments-sort review-comments-include-severity post-generic-pr-support-comments review-comments-sort scan-details-msg-include svg-checks autoapprove autoapprove-php-nonfunctional-changes hashes-api Options altered: phpcs-severityset to1 phpcs-sniffs-includeset toGeneric.PHP.DisallowShortOpenTag, Squiz.PHP.CommentedOutCode phpcs-sniffs-excludeset toWordPress.Security.EscapeOutput, WordPress.PHP.DevelopmentFunctions, WordPress.WP.AlternativeFunctions, WordPress.PHP.DiscouragedPHPFunctions, WordPress.Files.FileName, Squiz.Commenting.FileComment, Generic.PHP.Syntax skip-draft-prsset to

PHP lint options PHP lint files enabled: true Lint modified files only: true Directories not PHP linted: None SVG configuration SVG scanning enabled: true Auto-approval configuration Auto-approvals enabled: true Non-functional changes auto-approved: true Auto-approval DB enabled: true Auto-approved file-types: css csv eot gif gz ico ini jpeg jpg json less map md mdown mo mp4 otf pcss pdf po pot png sass scss styl ttf txt woff woff2 yml

PHPCS configuration PHPCS scanning enabled: true PHPCS severity level: 1 Standard(s) used: PHPCompatibility PHPCompatibilityParagonieRandomCompat PHPCompatibilityParagonieSodiumCompat VariableAnalysis WordPress Runtime set: testVersion 8.1- Custom sniffs included: Generic.PHP.DisallowShortOpenTag Squiz.PHP.CommentedOutCode Custom sniffs excluded: WordPress.Security.EscapeOutput WordPress.PHP.DevelopmentFunctions WordPress.WP.AlternativeFunctions WordPress.PHP.DiscouragedPHPFunctions WordPress.Files.FileName Squiz.Commenting.FileComment Generic.PHP.Syntax Directories not PHPCS scanned: tests/unit