ApiComparePagesTest.php

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<?php
 
class ApiComparePagesTest extends ApiTestCase {
 
    protected static $repl = [];
 
    protected function setUp() {
        parent::setUp();
 
        // Set $wgExternalDiffEngine to something bogus to try to force use of
        // the PHP engine rather than wikidiff2.
        $this->setMwGlobals( [
            'wgExternalDiffEngine' => '/dev/null',
        ] );
    }
 
    protected function addPage( $page, $text, $model = CONTENT_MODEL_WIKITEXT ) {
        $title = Title::newFromText( 'ApiComparePagesTest ' . $page );
        $content = ContentHandler::makeContent( $text, $title, $model );
 
        $page = WikiPage::factory( $title );
        $user = static::getTestSysop()->getUser();
        $status = $page->doEditContent(
            $content, 'Test for ApiComparePagesTest: ' . $text, 0, false, $user
        );
        if ( !$status->isOK() ) {
            $this->fail( "Failed to create $title: " . $status->getWikiText( false, false, 'en' ) );
        }
        return $status->value['revision']->getId();
    }
 
    public function addDBDataOnce() {
        $user = static::getTestSysop()->getUser();
        self::$repl['creator'] = $user->getName();
        self::$repl['creatorid'] = $user->getId();
 
        self::$repl['revA1'] = $this->addPage( 'A', 'A 1' );
        self::$repl['revA2'] = $this->addPage( 'A', 'A 2' );
        self::$repl['revA3'] = $this->addPage( 'A', 'A 3' );
        self::$repl['revA4'] = $this->addPage( 'A', 'A 4' );
        self::$repl['pageA'] = Title::newFromText( 'ApiComparePagesTest A' )->getArticleId();
 
        self::$repl['revB1'] = $this->addPage( 'B', 'B 1' );
        self::$repl['revB2'] = $this->addPage( 'B', 'B 2' );
        self::$repl['revB3'] = $this->addPage( 'B', 'B 3' );
        self::$repl['revB4'] = $this->addPage( 'B', 'B 4' );
        self::$repl['pageB'] = Title::newFromText( 'ApiComparePagesTest B' )->getArticleId();
 
        self::$repl['revC1'] = $this->addPage( 'C', 'C 1' );
        self::$repl['revC2'] = $this->addPage( 'C', 'C 2' );
        self::$repl['revC3'] = $this->addPage( 'C', 'C 3' );
        self::$repl['pageC'] = Title::newFromText( 'ApiComparePagesTest C' )->getArticleId();
 
        $id = $this->addPage( 'D', 'D 1' );
        self::$repl['pageD'] = Title::newFromText( 'ApiComparePagesTest D' )->getArticleId();
        wfGetDB( DB_MASTER )->delete( 'revision', [ 'rev_id' => $id ] );
 
        self::$repl['revE1'] = $this->addPage( 'E', 'E 1' );
        self::$repl['revE2'] = $this->addPage( 'E', 'E 2' );
        self::$repl['revE3'] = $this->addPage( 'E', 'E 3' );
        self::$repl['revE4'] = $this->addPage( 'E', 'E 4' );
        self::$repl['pageE'] = Title::newFromText( 'ApiComparePagesTest E' )->getArticleId();
        wfGetDB( DB_MASTER )->update(
            'page', [ 'page_latest' => 0 ], [ 'page_id' => self::$repl['pageE'] ]
        );
 
        self::$repl['revF1'] = $this->addPage( 'F', "== Section 1 ==\nF 1.1\n\n== Section 2 ==\nF 1.2" );
        self::$repl['pageF'] = Title::newFromText( 'ApiComparePagesTest F' )->getArticleId();
 
        self::$repl['revG1'] = $this->addPage( 'G', "== Section 1 ==\nG 1.1", CONTENT_MODEL_TEXT );
        self::$repl['pageG'] = Title::newFromText( 'ApiComparePagesTest G' )->getArticleId();
 
        WikiPage::factory( Title::newFromText( 'ApiComparePagesTest C' ) )
            ->doDeleteArticleReal( 'Test for ApiComparePagesTest' );
 
        RevisionDeleter::createList(
            'revision',
            RequestContext::getMain(),
            Title::newFromText( 'ApiComparePagesTest B' ),
            [ self::$repl['revB2'] ]
        )->setVisibility( [
            'value' => [
                Revision::DELETED_TEXT => 1,
                Revision::DELETED_USER => 1,
                Revision::DELETED_COMMENT => 1,
            ],
            'comment' => 'Test for ApiComparePages',
        ] );
 
        RevisionDeleter::createList(
            'revision',
            RequestContext::getMain(),
            Title::newFromText( 'ApiComparePagesTest B' ),
            [ self::$repl['revB3'] ]
        )->setVisibility( [
            'value' => [
                Revision::DELETED_USER => 1,
                Revision::DELETED_COMMENT => 1,
                Revision::DELETED_RESTRICTED => 1,
            ],
            'comment' => 'Test for ApiComparePages',
        ] );
 
        Title::clearCaches(); // Otherwise it has the wrong latest revision for some reason
    }
 
    protected function doReplacements( &$value ) {
        if ( is_string( $value ) ) {
            if ( preg_match( '/^{{REPL:(.+?)}}$/', $value, $m ) ) {
                $value = self::$repl[$m[1]];
            } else {
                $value = preg_replace_callback( '/{{REPL:(.+?)}}/', function ( $m ) {
                    return self::$repl[$m[1]] ?? $m[0];
                }, $value );
            }
        } elseif ( is_array( $value ) || is_object( $value ) ) {
            foreach ( $value as &$v ) {
                $this->doReplacements( $v );
            }
            unset( $v );
        }
    }
 
    public function testDiff( $params, $expect, $exceptionCode = false, $sysop = false ) {
        $this->doReplacements( $params );
 
        $params += [
            'action' => 'compare',
            'errorformat' => 'none',
        ];
 
        $user = $sysop
            ? static::getTestSysop()->getUser()
            : static::getTestUser()->getUser();
        if ( $exceptionCode ) {
            try {
                $this->doApiRequest( $params, null, false, $user );
                $this->fail( 'Expected exception not thrown' );
            } catch ( ApiUsageException $ex ) {
                $this->assertTrue( $this->apiExceptionHasCode( $ex, $exceptionCode ),
                    "Exception with code $exceptionCode" );
            }
        } else {
            $apiResult = $this->doApiRequest( $params, null, false, $user );
            $apiResult = $apiResult[0];
            $this->doReplacements( $expect );
            $this->assertEquals( $expect, $apiResult );
        }
    }
 
    private static function makeDeprecationWarnings( ...$params ) {
        $warn = [];
        foreach ( $params as $p ) {
            $warn[] = [
                'code' => 'deprecation',
                'data' => [ 'feature' => "action=compare&{$p}" ],
                'module' => 'compare',
            ];
            if ( count( $warn ) === 1 ) {
                $warn[] = [
                    'code' => 'deprecation-help',
                    'module' => 'main',
                ];
            }
        }
 
        return $warn;
    }
 
    public static function provideDiff() {
        // phpcs:disable Generic.Files.LineLength.TooLong
        return [
            'Basic diff, titles' => [
                [
                    'fromtitle' => 'ApiComparePagesTest A',
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA4}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest A',
                        'toid' => '{{REPL:pageB}}',
                        'torevid' => '{{REPL:revB4}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest B',
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">A </del>4</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">B </ins>4</div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, page IDs' => [
                [
                    'fromid' => '{{REPL:pageA}}',
                    'toid' => '{{REPL:pageB}}',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA4}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest A',
                        'toid' => '{{REPL:pageB}}',
                        'torevid' => '{{REPL:revB4}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest B',
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">A </del>4</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">B </ins>4</div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, revision IDs' => [
                [
                    'fromrev' => '{{REPL:revA2}}',
                    'torev' => '{{REPL:revA3}}',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA2}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest A',
                        'toid' => '{{REPL:pageA}}',
                        'torevid' => '{{REPL:revA3}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest A',
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div>A <del class="diffchange diffchange-inline">2</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div>A <ins class="diffchange diffchange-inline">3</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deleted revision ID as sysop' => [
                [
                    'fromrev' => '{{REPL:revA2}}',
                    'torev' => '{{REPL:revC2}}',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA2}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest A',
                        'toid' => 0,
                        'torevid' => '{{REPL:revC2}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest C',
                        'toarchive' => true,
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">A </del>2</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">C </ins>2</div></td></tr>' . "\n",
                    ]
                ],
                false, true
            ],
            'Basic diff, revdel as sysop' => [
                [
                    'fromrev' => '{{REPL:revA2}}',
                    'torev' => '{{REPL:revB2}}',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA2}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest A',
                        'toid' => '{{REPL:pageB}}',
                        'torevid' => '{{REPL:revB2}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest B',
                        'totexthidden' => true,
                        'touserhidden' => true,
                        'tocommenthidden' => true,
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">A </del>2</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">B </ins>2</div></td></tr>' . "\n",
                    ]
                ],
                false, true
            ],
            'Basic diff, text' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'fromcontentmodel-main' => 'wikitext',
                    'toslots' => 'main',
                    'totext-main' => 'To text {{subst:PAGENAME}}',
                    'tocontentmodel-main' => 'wikitext',
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">{{subst:PAGENAME}}</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, text 2' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'toslots' => 'main',
                    'totext-main' => 'To text {{subst:PAGENAME}}',
                    'tocontentmodel-main' => 'wikitext',
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">{{subst:PAGENAME}}</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, guessed model' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'toslots' => 'main',
                    'totext-main' => 'To text',
                ],
                [
                    'warnings' => [ [ 'code' => 'compare-nocontentmodel', 'module' => 'compare' ] ],
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text</div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, text with title and PST' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'totitle' => 'Test',
                    'toslots' => 'main',
                    'totext-main' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">Test</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, text with page ID and PST' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'toid' => '{{REPL:pageB}}',
                    'toslots' => 'main',
                    'totext-main' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">ApiComparePagesTest B</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, text with revision and PST' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'torev' => '{{REPL:revB2}}',
                    'toslots' => 'main',
                    'totext-main' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">ApiComparePagesTest B</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, text with deleted revision and PST' => [
                [
                    'fromslots' => 'main',
                    'fromtext-main' => 'From text',
                    'torev' => '{{REPL:revC2}}',
                    'toslots' => 'main',
                    'totext-main' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">ApiComparePagesTest C</ins></div></td></tr>' . "\n",
                    ]
                ],
                false, true
            ],
            'Basic diff, test with sections' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'fromslots' => 'main',
                    'fromtext-main' => "== Section 2 ==\nFrom text?",
                    'fromsection-main' => 2,
                    'totitle' => 'ApiComparePagesTest F',
                    'toslots' => 'main',
                    'totext-main' => "== Section 1 ==\nTo text?",
                    'tosection-main' => 1,
                ],
                [
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'> </td><td class=\'diff-context\'><div>== Section 1 ==</div></td><td class=\'diff-marker\'> </td><td class=\'diff-context\'><div>== Section 1 ==</div></td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">F 1.1</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To text?</ins></div></td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'> </td><td class=\'diff-context\'></td><td class=\'diff-marker\'> </td><td class=\'diff-context\'></td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'> </td><td class=\'diff-context\'><div>== Section 2 ==</div></td><td class=\'diff-marker\'> </td><td class=\'diff-context\'><div>== Section 2 ==</div></td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From text?</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">F 1.2</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Diff with all props' => [
                [
                    'fromrev' => '{{REPL:revB1}}',
                    'torev' => '{{REPL:revB3}}',
                    'totitle' => 'ApiComparePagesTest B',
                    'prop' => 'diff|diffsize|rel|ids|title|user|comment|parsedcomment|size'
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageB}}',
                        'fromrevid' => '{{REPL:revB1}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest B',
                        'fromsize' => 3,
                        'fromuser' => '{{REPL:creator}}',
                        'fromuserid' => '{{REPL:creatorid}}',
                        'fromcomment' => 'Test for ApiComparePagesTest: B 1',
                        'fromparsedcomment' => 'Test for ApiComparePagesTest: B 1',
                        'toid' => '{{REPL:pageB}}',
                        'torevid' => '{{REPL:revB3}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest B',
                        'tosize' => 3,
                        'touserhidden' => true,
                        'tocommenthidden' => true,
                        'tosuppressed' => true,
                        'next' => '{{REPL:revB4}}',
                        'diffsize' => 391,
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div>B <del class="diffchange diffchange-inline">1</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div>B <ins class="diffchange diffchange-inline">3</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Diff with all props as sysop' => [
                [
                    'fromrev' => '{{REPL:revB2}}',
                    'torev' => '{{REPL:revB3}}',
                    'totitle' => 'ApiComparePagesTest B',
                    'prop' => 'diff|diffsize|rel|ids|title|user|comment|parsedcomment|size'
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageB}}',
                        'fromrevid' => '{{REPL:revB2}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest B',
                        'fromsize' => 3,
                        'fromtexthidden' => true,
                        'fromuserhidden' => true,
                        'fromuser' => '{{REPL:creator}}',
                        'fromuserid' => '{{REPL:creatorid}}',
                        'fromcommenthidden' => true,
                        'fromcomment' => 'Test for ApiComparePagesTest: B 2',
                        'fromparsedcomment' => 'Test for ApiComparePagesTest: B 2',
                        'toid' => '{{REPL:pageB}}',
                        'torevid' => '{{REPL:revB3}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest B',
                        'tosize' => 3,
                        'touserhidden' => true,
                        'tocommenthidden' => true,
                        'tosuppressed' => true,
                        'prev' => '{{REPL:revB1}}',
                        'next' => '{{REPL:revB4}}',
                        'diffsize' => 391,
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div>B <del class="diffchange diffchange-inline">2</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div>B <ins class="diffchange diffchange-inline">3</ins></div></td></tr>' . "\n",
                    ]
                ],
                false, true
            ],
            'Relative diff, cur' => [
                [
                    'fromrev' => '{{REPL:revA2}}',
                    'torelative' => 'cur',
                    'prop' => 'ids',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA2}}',
                        'toid' => '{{REPL:pageA}}',
                        'torevid' => '{{REPL:revA4}}',
                    ]
                ],
            ],
            'Relative diff, next' => [
                [
                    'fromrev' => '{{REPL:revE2}}',
                    'torelative' => 'next',
                    'prop' => 'ids|rel',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageE}}',
                        'fromrevid' => '{{REPL:revE2}}',
                        'toid' => '{{REPL:pageE}}',
                        'torevid' => '{{REPL:revE3}}',
                        'prev' => '{{REPL:revE1}}',
                        'next' => '{{REPL:revE4}}',
                    ]
                ],
            ],
            'Relative diff, prev' => [
                [
                    'fromrev' => '{{REPL:revE3}}',
                    'torelative' => 'prev',
                    'prop' => 'ids|rel',
                ],
                [
                    'compare' => [
                        'fromid' => '{{REPL:pageE}}',
                        'fromrevid' => '{{REPL:revE2}}',
                        'toid' => '{{REPL:pageE}}',
                        'torevid' => '{{REPL:revE3}}',
                        'prev' => '{{REPL:revE1}}',
                        'next' => '{{REPL:revE4}}',
                    ]
                ],
            ],
            'Relative diff, no prev' => [
                [
                    'fromrev' => '{{REPL:revA1}}',
                    'torelative' => 'prev',
                    'prop' => 'ids|rel|diff|title|user|comment',
                ],
                [
                    'warnings' => [
                        [
                            'code' => 'compare-no-prev',
                            'module' => 'compare',
                        ],
                    ],
                    'compare' => [
                        'toid' => '{{REPL:pageA}}',
                        'torevid' => '{{REPL:revA1}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest A',
                        'touser' => '{{REPL:creator}}',
                        'touserid' => '{{REPL:creatorid}}',
                        'tocomment' => 'Test for ApiComparePagesTest: A 1',
                        'toparsedcomment' => 'Test for ApiComparePagesTest: A 1',
                        'next' => '{{REPL:revA2}}',
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div> </div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">A 1</ins></div></td></tr>' . "\n",
                    ],
                ],
            ],
            'Relative diff, no next' => [
                [
                    'fromrev' => '{{REPL:revA4}}',
                    'torelative' => 'next',
                    'prop' => 'ids|rel|diff|title|user|comment',
                ],
                [
                    'warnings' => [
                        [
                            'code' => 'compare-no-next',
                            'module' => 'compare',
                        ],
                    ],
                    'compare' => [
                        'fromid' => '{{REPL:pageA}}',
                        'fromrevid' => '{{REPL:revA4}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest A',
                        'fromuser' => '{{REPL:creator}}',
                        'fromuserid' => '{{REPL:creatorid}}',
                        'fromcomment' => 'Test for ApiComparePagesTest: A 4',
                        'fromparsedcomment' => 'Test for ApiComparePagesTest: A 4',
                        'prev' => '{{REPL:revA3}}',
                        'body' => '',
                    ],
                ],
            ],
            'Diff for specific slots' => [
                // @todo Use a page with multiple slots here
                [
                    'fromrev' => '{{REPL:revA1}}',
                    'torev' => '{{REPL:revA3}}',
                    'prop' => 'diff',
                    'slots' => 'main',
                ],
                [
                    'compare' => [
                        'bodies' => [
                            'main' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                                . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                                . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div>A <del class="diffchange diffchange-inline">1</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div>A <ins class="diffchange diffchange-inline">3</ins></div></td></tr>' . "\n",
                        ],
                    ],
                ],
            ],
            // @todo Add a test for diffing with a deleted slot. Deleting 'main' doesn't work.
 
            'Basic diff, deprecated text' => [
                [
                    'fromtext' => 'From text',
                    'fromcontentmodel' => 'wikitext',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'tocontentmodel' => 'wikitext',
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromtext', 'fromcontentmodel', 'totext', 'tocontentmodel' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">{{subst:PAGENAME}}</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deprecated text 2' => [
                [
                    'fromtext' => 'From text',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'tocontentmodel' => 'wikitext',
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromtext', 'totext', 'tocontentmodel' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">{{subst:PAGENAME}}</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deprecated text, guessed model' => [
                [
                    'fromtext' => 'From text',
                    'totext' => 'To text',
                ],
                [
                    'warnings' => array_merge( self::makeDeprecationWarnings( 'fromtext', 'totext' ), [
                        [ 'code' => 'compare-nocontentmodel', 'module' => 'compare' ],
                    ] ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text</div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deprecated text with title and PST' => [
                [
                    'fromtext' => 'From text',
                    'totitle' => 'Test',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromtext', 'totext' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">Test</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deprecated text with page ID and PST' => [
                [
                    'fromtext' => 'From text',
                    'toid' => '{{REPL:pageB}}',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromtext', 'totext' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">ApiComparePagesTest B</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deprecated text with revision and PST' => [
                [
                    'fromtext' => 'From text',
                    'torev' => '{{REPL:revB2}}',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromtext', 'totext' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">ApiComparePagesTest B</ins></div></td></tr>' . "\n",
                    ]
                ],
            ],
            'Basic diff, deprecated text with deleted revision and PST' => [
                [
                    'fromtext' => 'From text',
                    'torev' => '{{REPL:revC2}}',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromtext', 'totext' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">From </del>text</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To </ins>text <ins class="diffchange diffchange-inline">ApiComparePagesTest C</ins></div></td></tr>' . "\n",
                    ]
                ],
                false, true
            ],
            'Basic diff, test with deprecated sections' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'fromsection' => 1,
                    'totext' => "== Section 1 ==\nTo text\n\n== Section 2 ==\nTo text?",
                    'tosection' => 2,
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromsection', 'totext', 'tosection' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div>== Section <del class="diffchange diffchange-inline">1 </del>==</div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div>== Section <ins class="diffchange diffchange-inline">2 </ins>==</div></td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div><del class="diffchange diffchange-inline">F 1.1</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div><ins class="diffchange diffchange-inline">To text?</ins></div></td></tr>' . "\n",
                        'fromid' => '{{REPL:pageF}}',
                        'fromrevid' => '{{REPL:revF1}}',
                        'fromns' => '0',
                        'fromtitle' => 'ApiComparePagesTest F',
                    ]
                ],
            ],
            'Basic diff, test with deprecated sections and revdel, non-sysop' => [
                [
                    'fromrev' => '{{REPL:revB2}}',
                    'fromsection' => 0,
                    'torev' => '{{REPL:revB4}}',
                    'tosection' => 0,
                ],
                [],
                'missingcontent'
            ],
            'Basic diff, test with deprecated sections and revdel, sysop' => [
                [
                    'fromrev' => '{{REPL:revB2}}',
                    'fromsection' => 0,
                    'torev' => '{{REPL:revB4}}',
                    'tosection' => 0,
                ],
                [
                    'warnings' => self::makeDeprecationWarnings( 'fromsection', 'tosection' ),
                    'compare' => [
                        'body' => '<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>' . "\n"
                            . '<td colspan="2" class="diff-lineno">Line 1:</td></tr>' . "\n"
                            . '<tr><td class=\'diff-marker\'>−</td><td class=\'diff-deletedline\'><div>B <del class="diffchange diffchange-inline">2</del></div></td><td class=\'diff-marker\'>+</td><td class=\'diff-addedline\'><div>B <ins class="diffchange diffchange-inline">4</ins></div></td></tr>' . "\n",
                        'fromid' => '{{REPL:pageB}}',
                        'fromrevid' => '{{REPL:revB2}}',
                        'fromns' => 0,
                        'fromtitle' => 'ApiComparePagesTest B',
                        'fromtexthidden' => true,
                        'fromuserhidden' => true,
                        'fromcommenthidden' => true,
                        'toid' => '{{REPL:pageB}}',
                        'torevid' => '{{REPL:revB4}}',
                        'tons' => 0,
                        'totitle' => 'ApiComparePagesTest B',
                    ]
                ],
                false, true,
            ],
 
            'Error, missing title' => [
                [
                    'fromtitle' => 'ApiComparePagesTest X',
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [],
                'missingtitle',
            ],
            'Error, invalid title' => [
                [
                    'fromtitle' => '<bad>',
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [],
                'invalidtitle',
            ],
            'Error, missing page ID' => [
                [
                    'fromid' => 8817900,
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [],
                'nosuchpageid',
            ],
            'Error, page with missing revision' => [
                [
                    'fromtitle' => 'ApiComparePagesTest D',
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [],
                'nosuchrevid',
            ],
            'Error, page with no revision' => [
                [
                    'fromtitle' => 'ApiComparePagesTest E',
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [],
                'nosuchrevid',
            ],
            'Error, bad rev ID' => [
                [
                    'fromrev' => 8817900,
                    'totitle' => 'ApiComparePagesTest B',
                ],
                [],
                'nosuchrevid',
            ],
            'Error, deleted revision ID, non-sysop' => [
                [
                    'fromrev' => '{{REPL:revA2}}',
                    'torev' => '{{REPL:revC2}}',
                ],
                [],
                'nosuchrevid',
            ],
            'Error, revision-deleted content' => [
                [
                    'fromrev' => '{{REPL:revA2}}',
                    'torev' => '{{REPL:revB2}}',
                ],
                [],
                'missingcontent',
            ],
            'Error, text with no title and PST' => [
                [
                    'fromtext' => 'From text',
                    'totext' => 'To text {{subst:PAGENAME}}',
                    'topst' => true,
                ],
                [],
                'compare-no-title',
            ],
            'Error, test with invalid from section ID' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'fromsection' => 5,
                    'totext' => "== Section 1 ==\nTo text\n\n== Section 2 ==\nTo text?",
                    'tosection' => 2,
                ],
                [],
                'nosuchfromsection',
            ],
            'Error, test with invalid to section ID' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'fromsection' => 1,
                    'totext' => "== Section 1 ==\nTo text\n\n== Section 2 ==\nTo text?",
                    'tosection' => 5,
                ],
                [],
                'nosuchtosection',
            ],
            'Error, Relative diff, no from revision' => [
                [
                    'fromtext' => 'Foo',
                    'torelative' => 'cur',
                    'prop' => 'ids',
                ],
                [],
                'compare-relative-to-nothing'
            ],
            'Error, Relative diff, cur with no current revision' => [
                [
                    'fromrev' => '{{REPL:revE2}}',
                    'torelative' => 'cur',
                    'prop' => 'ids',
                ],
                [],
                'nosuchrevid'
            ],
            'Error, Relative diff, next revdeleted' => [
                [
                    'fromrev' => '{{REPL:revB1}}',
                    'torelative' => 'next',
                    'prop' => 'ids',
                ],
                [],
                'missingcontent'
            ],
            'Error, Relative diff, prev revdeleted' => [
                [
                    'fromrev' => '{{REPL:revB3}}',
                    'torelative' => 'prev',
                    'prop' => 'ids',
                ],
                [],
                'missingcontent'
            ],
            'Error, section diff with no revision' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'toslots' => 'main',
                    'totext-main' => "== Section 1 ==\nTo text?",
                    'tosection-main' => 1,
                ],
                [],
                'compare-notorevision',
            ],
            'Error, section diff with revdeleted revision' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'torev' => '{{REPL:revB2}}',
                    'toslots' => 'main',
                    'totext-main' => "== Section 1 ==\nTo text?",
                    'tosection-main' => 1,
                ],
                [],
                'missingcontent',
            ],
            'Error, section diff with a content model not supporting sections' => [
                [
                    'fromtitle' => 'ApiComparePagesTest G',
                    'torev' => '{{REPL:revG1}}',
                    'toslots' => 'main',
                    'totext-main' => "== Section 1 ==\nTo text?",
                    'tosection-main' => 1,
                ],
                [],
                'sectionsnotsupported',
            ],
            'Error, section diff with bad content model' => [
                [
                    'fromtitle' => 'ApiComparePagesTest F',
                    'torev' => '{{REPL:revF1}}',
                    'toslots' => 'main',
                    'totext-main' => "== Section 1 ==\nTo text?",
                    'tosection-main' => 1,
                    'tocontentmodel-main' => CONTENT_MODEL_TEXT,
                ],
                [],
                'sectionreplacefailed',
            ],
            'Error, deleting the main slot' => [
                [
                    'fromtitle' => 'ApiComparePagesTest A',
                    'totitle' => 'ApiComparePagesTest A',
                    'toslots' => 'main',
                ],
                [],
                'compare-maintextrequired',
            ],
            // @todo Add a test for using 'tosection-foo' without 'totext-foo' (can't do it with main)
        ];
        // phpcs:enable
    }
}