CommentStoreTest.php

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<?php
 
use Wikimedia\ScopedCallback;
use Wikimedia\TestingAccessWrapper;
 
class CommentStoreTest extends MediaWikiLangTestCase {
 
    protected $tablesUsed = [
        'revision',
        'revision_comment_temp',
        'ipblocks',
        'comment',
    ];
 
    protected function makeStore( $stage ) {
        global $wgContLang;
        $store = new CommentStore( $wgContLang, $stage );
        return $store;
    }
 
    protected function makeStoreWithKey( $stage, $key ) {
        $store = CommentStore::newKey( $key );
        TestingAccessWrapper::newFromObject( $store )->stage = $stage;
        return $store;
    }
 
    public function testGetFields_withKeyConstruction( $stage, $key, $expect ) {
        $store = $this->makeStoreWithKey( $stage, $key );
        $result = $store->getFields();
        $this->assertEquals( $expect, $result );
    }
 
    public function testGetFields( $stage, $key, $expect ) {
        $store = $this->makeStore( $stage );
        $result = $store->getFields( $key );
        $this->assertEquals( $expect, $result );
    }
 
    public static function provideGetFields() {
        return [
            'Simple table, old' => [
                MIGRATION_OLD, 'ipb_reason',
                [ 'ipb_reason_text' => 'ipb_reason', 'ipb_reason_data' => 'NULL', 'ipb_reason_cid' => 'NULL' ],
            ],
            'Simple table, write-both' => [
                MIGRATION_WRITE_BOTH, 'ipb_reason',
                [ 'ipb_reason_old' => 'ipb_reason', 'ipb_reason_id' => 'ipb_reason_id' ],
            ],
            'Simple table, write-new' => [
                MIGRATION_WRITE_NEW, 'ipb_reason',
                [ 'ipb_reason_old' => 'ipb_reason', 'ipb_reason_id' => 'ipb_reason_id' ],
            ],
            'Simple table, new' => [
                MIGRATION_NEW, 'ipb_reason',
                [ 'ipb_reason_id' => 'ipb_reason_id' ],
            ],
 
            'Revision, old' => [
                MIGRATION_OLD, 'rev_comment',
                [
                    'rev_comment_text' => 'rev_comment',
                    'rev_comment_data' => 'NULL',
                    'rev_comment_cid' => 'NULL',
                ],
            ],
            'Revision, write-both' => [
                MIGRATION_WRITE_BOTH, 'rev_comment',
                [ 'rev_comment_old' => 'rev_comment', 'rev_comment_pk' => 'rev_id' ],
            ],
            'Revision, write-new' => [
                MIGRATION_WRITE_NEW, 'rev_comment',
                [ 'rev_comment_old' => 'rev_comment', 'rev_comment_pk' => 'rev_id' ],
            ],
            'Revision, new' => [
                MIGRATION_NEW, 'rev_comment',
                [ 'rev_comment_pk' => 'rev_id' ],
            ],
 
            'Image, old' => [
                MIGRATION_OLD, 'img_description',
                [
                    'img_description_text' => 'img_description',
                    'img_description_data' => 'NULL',
                    'img_description_cid' => 'NULL',
                ],
            ],
            'Image, write-both' => [
                MIGRATION_WRITE_BOTH, 'img_description',
                [ 'img_description_old' => 'img_description', 'img_description_pk' => 'img_name' ],
            ],
            'Image, write-new' => [
                MIGRATION_WRITE_NEW, 'img_description',
                [ 'img_description_old' => 'img_description', 'img_description_pk' => 'img_name' ],
            ],
            'Image, new' => [
                MIGRATION_NEW, 'img_description',
                [ 'img_description_pk' => 'img_name' ],
            ],
        ];
    }
 
    public function testGetJoin_withKeyConstruction( $stage, $key, $expect ) {
        $store = $this->makeStoreWithKey( $stage, $key );
        $result = $store->getJoin();
        $this->assertEquals( $expect, $result );
    }
 
    public function testGetJoin( $stage, $key, $expect ) {
        $store = $this->makeStore( $stage );
        $result = $store->getJoin( $key );
        $this->assertEquals( $expect, $result );
    }
 
    public static function provideGetJoin() {
        return [
            'Simple table, old' => [
                MIGRATION_OLD, 'ipb_reason', [
                    'tables' => [],
                    'fields' => [
                        'ipb_reason_text' => 'ipb_reason',
                        'ipb_reason_data' => 'NULL',
                        'ipb_reason_cid' => 'NULL',
                    ],
                    'joins' => [],
                ],
            ],
            'Simple table, write-both' => [
                MIGRATION_WRITE_BOTH, 'ipb_reason', [
                    'tables' => [ 'comment_ipb_reason' => 'comment' ],
                    'fields' => [
                        'ipb_reason_text' => 'COALESCE( comment_ipb_reason.comment_text, ipb_reason )',
                        'ipb_reason_data' => 'comment_ipb_reason.comment_data',
                        'ipb_reason_cid' => 'comment_ipb_reason.comment_id',
                    ],
                    'joins' => [
                        'comment_ipb_reason' => [ 'LEFT JOIN', 'comment_ipb_reason.comment_id = ipb_reason_id' ],
                    ],
                ],
            ],
            'Simple table, write-new' => [
                MIGRATION_WRITE_NEW, 'ipb_reason', [
                    'tables' => [ 'comment_ipb_reason' => 'comment' ],
                    'fields' => [
                        'ipb_reason_text' => 'COALESCE( comment_ipb_reason.comment_text, ipb_reason )',
                        'ipb_reason_data' => 'comment_ipb_reason.comment_data',
                        'ipb_reason_cid' => 'comment_ipb_reason.comment_id',
                    ],
                    'joins' => [
                        'comment_ipb_reason' => [ 'LEFT JOIN', 'comment_ipb_reason.comment_id = ipb_reason_id' ],
                    ],
                ],
            ],
            'Simple table, new' => [
                MIGRATION_NEW, 'ipb_reason', [
                    'tables' => [ 'comment_ipb_reason' => 'comment' ],
                    'fields' => [
                        'ipb_reason_text' => 'comment_ipb_reason.comment_text',
                        'ipb_reason_data' => 'comment_ipb_reason.comment_data',
                        'ipb_reason_cid' => 'comment_ipb_reason.comment_id',
                    ],
                    'joins' => [
                        'comment_ipb_reason' => [ 'JOIN', 'comment_ipb_reason.comment_id = ipb_reason_id' ],
                    ],
                ],
            ],
 
            'Revision, old' => [
                MIGRATION_OLD, 'rev_comment', [
                    'tables' => [],
                    'fields' => [
                        'rev_comment_text' => 'rev_comment',
                        'rev_comment_data' => 'NULL',
                        'rev_comment_cid' => 'NULL',
                    ],
                    'joins' => [],
                ],
            ],
            'Revision, write-both' => [
                MIGRATION_WRITE_BOTH, 'rev_comment', [
                    'tables' => [
                        'temp_rev_comment' => 'revision_comment_temp',
                        'comment_rev_comment' => 'comment',
                    ],
                    'fields' => [
                        'rev_comment_text' => 'COALESCE( comment_rev_comment.comment_text, rev_comment )',
                        'rev_comment_data' => 'comment_rev_comment.comment_data',
                        'rev_comment_cid' => 'comment_rev_comment.comment_id',
                    ],
                    'joins' => [
                        'temp_rev_comment' => [ 'LEFT JOIN', 'temp_rev_comment.revcomment_rev = rev_id' ],
                        'comment_rev_comment' => [ 'LEFT JOIN',
                            'comment_rev_comment.comment_id = temp_rev_comment.revcomment_comment_id' ],
                    ],
                ],
            ],
            'Revision, write-new' => [
                MIGRATION_WRITE_NEW, 'rev_comment', [
                    'tables' => [
                        'temp_rev_comment' => 'revision_comment_temp',
                        'comment_rev_comment' => 'comment',
                    ],
                    'fields' => [
                        'rev_comment_text' => 'COALESCE( comment_rev_comment.comment_text, rev_comment )',
                        'rev_comment_data' => 'comment_rev_comment.comment_data',
                        'rev_comment_cid' => 'comment_rev_comment.comment_id',
                    ],
                    'joins' => [
                        'temp_rev_comment' => [ 'LEFT JOIN', 'temp_rev_comment.revcomment_rev = rev_id' ],
                        'comment_rev_comment' => [ 'LEFT JOIN',
                            'comment_rev_comment.comment_id = temp_rev_comment.revcomment_comment_id' ],
                    ],
                ],
            ],
            'Revision, new' => [
                MIGRATION_NEW, 'rev_comment', [
                    'tables' => [
                        'temp_rev_comment' => 'revision_comment_temp',
                        'comment_rev_comment' => 'comment',
                    ],
                    'fields' => [
                        'rev_comment_text' => 'comment_rev_comment.comment_text',
                        'rev_comment_data' => 'comment_rev_comment.comment_data',
                        'rev_comment_cid' => 'comment_rev_comment.comment_id',
                    ],
                    'joins' => [
                        'temp_rev_comment' => [ 'JOIN', 'temp_rev_comment.revcomment_rev = rev_id' ],
                        'comment_rev_comment' => [ 'JOIN',
                            'comment_rev_comment.comment_id = temp_rev_comment.revcomment_comment_id' ],
                    ],
                ],
            ],
 
            'Image, old' => [
                MIGRATION_OLD, 'img_description', [
                    'tables' => [],
                    'fields' => [
                        'img_description_text' => 'img_description',
                        'img_description_data' => 'NULL',
                        'img_description_cid' => 'NULL',
                    ],
                    'joins' => [],
                ],
            ],
            'Image, write-both' => [
                MIGRATION_WRITE_BOTH, 'img_description', [
                    'tables' => [
                        'temp_img_description' => 'image_comment_temp',
                        'comment_img_description' => 'comment',
                    ],
                    'fields' => [
                        'img_description_text' => 'COALESCE( comment_img_description.comment_text, img_description )',
                        'img_description_data' => 'comment_img_description.comment_data',
                        'img_description_cid' => 'comment_img_description.comment_id',
                    ],
                    'joins' => [
                        'temp_img_description' => [ 'LEFT JOIN', 'temp_img_description.imgcomment_name = img_name' ],
                        'comment_img_description' => [ 'LEFT JOIN',
                            'comment_img_description.comment_id = temp_img_description.imgcomment_description_id' ],
                    ],
                ],
            ],
            'Image, write-new' => [
                MIGRATION_WRITE_NEW, 'img_description', [
                    'tables' => [
                        'temp_img_description' => 'image_comment_temp',
                        'comment_img_description' => 'comment',
                    ],
                    'fields' => [
                        'img_description_text' => 'COALESCE( comment_img_description.comment_text, img_description )',
                        'img_description_data' => 'comment_img_description.comment_data',
                        'img_description_cid' => 'comment_img_description.comment_id',
                    ],
                    'joins' => [
                        'temp_img_description' => [ 'LEFT JOIN', 'temp_img_description.imgcomment_name = img_name' ],
                        'comment_img_description' => [ 'LEFT JOIN',
                            'comment_img_description.comment_id = temp_img_description.imgcomment_description_id' ],
                    ],
                ],
            ],
            'Image, new' => [
                MIGRATION_NEW, 'img_description', [
                    'tables' => [
                        'temp_img_description' => 'image_comment_temp',
                        'comment_img_description' => 'comment',
                    ],
                    'fields' => [
                        'img_description_text' => 'comment_img_description.comment_text',
                        'img_description_data' => 'comment_img_description.comment_data',
                        'img_description_cid' => 'comment_img_description.comment_id',
                    ],
                    'joins' => [
                        'temp_img_description' => [ 'JOIN', 'temp_img_description.imgcomment_name = img_name' ],
                        'comment_img_description' => [ 'JOIN',
                            'comment_img_description.comment_id = temp_img_description.imgcomment_description_id' ],
                    ],
                ],
            ],
        ];
    }
 
    private function assertComment( $expect, $actual, $from ) {
        $this->assertSame( $expect['text'], $actual->text, "text $from" );
        $this->assertInstanceOf( get_class( $expect['message'] ), $actual->message,
            "message class $from" );
        $this->assertSame( $expect['message']->getKeysToTry(), $actual->message->getKeysToTry(),
            "message keys $from" );
        $this->assertEquals( $expect['message']->text(), $actual->message->text(),
            "message rendering $from" );
        $this->assertEquals( $expect['data'], $actual->data, "data $from" );
    }
 
    public function testInsertRoundTrip( $table, $key, $pk, $extraFields, $comment, $data, $expect ) {
        $expectOld = [
            'text' => $expect['text'],
            'message' => new RawMessage( '$1', [ $expect['text'] ] ),
            'data' => null,
        ];
 
        $stages = [
            MIGRATION_OLD => [ MIGRATION_OLD, MIGRATION_WRITE_NEW ],
            MIGRATION_WRITE_BOTH => [ MIGRATION_OLD, MIGRATION_NEW ],
            MIGRATION_WRITE_NEW => [ MIGRATION_WRITE_BOTH, MIGRATION_NEW ],
            MIGRATION_NEW => [ MIGRATION_WRITE_BOTH, MIGRATION_NEW ],
        ];
 
        foreach ( $stages as $writeStage => $readRange ) {
            if ( $key === 'ipb_reason' ) {
                $extraFields['ipb_address'] = __CLASS__ . "#$writeStage";
            }
 
            $wstore = $this->makeStore( $writeStage );
            $usesTemp = $key === 'rev_comment';
 
            if ( $usesTemp ) {
                list( $fields, $callback ) = $wstore->insertWithTempTable(
                    $this->db, $key, $comment, $data
                );
            } else {
                $fields = $wstore->insert( $this->db, $key, $comment, $data );
            }
 
            if ( $writeStage <= MIGRATION_WRITE_BOTH ) {
                $this->assertSame( $expect['text'], $fields[$key], "old field, stage=$writeStage" );
            } else {
                $this->assertArrayNotHasKey( $key, $fields, "old field, stage=$writeStage" );
            }
            if ( $writeStage >= MIGRATION_WRITE_BOTH && !$usesTemp ) {
                $this->assertArrayHasKey( "{$key}_id", $fields, "new field, stage=$writeStage" );
            } else {
                $this->assertArrayNotHasKey( "{$key}_id", $fields, "new field, stage=$writeStage" );
            }
 
            $this->db->insert( $table, $extraFields + $fields, __METHOD__ );
            $id = $this->db->insertId();
            if ( $usesTemp ) {
                $callback( $id );
            }
 
            for ( $readStage = $readRange[0]; $readStage <= $readRange[1]; $readStage++ ) {
                $rstore = $this->makeStore( $readStage );
 
                $fieldRow = $this->db->selectRow(
                    $table,
                    $rstore->getFields( $key ),
                    [ $pk => $id ],
                    __METHOD__
                );
 
                $queryInfo = $rstore->getJoin( $key );
                $joinRow = $this->db->selectRow(
                    [ $table ] + $queryInfo['tables'],
                    $queryInfo['fields'],
                    [ $pk => $id ],
                    __METHOD__,
                    [],
                    $queryInfo['joins']
                );
 
                $this->assertComment(
                    $writeStage === MIGRATION_OLD || $readStage === MIGRATION_OLD ? $expectOld : $expect,
                    $rstore->getCommentLegacy( $this->db, $key, $fieldRow ),
                    "w=$writeStage, r=$readStage, from getFields()"
                );
                $this->assertComment(
                    $writeStage === MIGRATION_OLD || $readStage === MIGRATION_OLD ? $expectOld : $expect,
                    $rstore->getComment( $key, $joinRow ),
                    "w=$writeStage, r=$readStage, from getJoin()"
                );
            }
        }
    }
 
    public function testInsertRoundTrip_withKeyConstruction(
        $table, $key, $pk, $extraFields, $comment, $data, $expect
    ) {
        $expectOld = [
            'text' => $expect['text'],
            'message' => new RawMessage( '$1', [ $expect['text'] ] ),
            'data' => null,
        ];
 
        $stages = [
            MIGRATION_OLD => [ MIGRATION_OLD, MIGRATION_WRITE_NEW ],
            MIGRATION_WRITE_BOTH => [ MIGRATION_OLD, MIGRATION_NEW ],
            MIGRATION_WRITE_NEW => [ MIGRATION_WRITE_BOTH, MIGRATION_NEW ],
            MIGRATION_NEW => [ MIGRATION_WRITE_BOTH, MIGRATION_NEW ],
        ];
 
        foreach ( $stages as $writeStage => $readRange ) {
            if ( $key === 'ipb_reason' ) {
                $extraFields['ipb_address'] = __CLASS__ . "#$writeStage";
            }
 
            $wstore = $this->makeStoreWithKey( $writeStage, $key );
            $usesTemp = $key === 'rev_comment';
 
            if ( $usesTemp ) {
                list( $fields, $callback ) = $wstore->insertWithTempTable(
                    $this->db, $comment, $data
                );
            } else {
                $fields = $wstore->insert( $this->db, $comment, $data );
            }
 
            if ( $writeStage <= MIGRATION_WRITE_BOTH ) {
                $this->assertSame( $expect['text'], $fields[$key], "old field, stage=$writeStage" );
            } else {
                $this->assertArrayNotHasKey( $key, $fields, "old field, stage=$writeStage" );
            }
            if ( $writeStage >= MIGRATION_WRITE_BOTH && !$usesTemp ) {
                $this->assertArrayHasKey( "{$key}_id", $fields, "new field, stage=$writeStage" );
            } else {
                $this->assertArrayNotHasKey( "{$key}_id", $fields, "new field, stage=$writeStage" );
            }
 
            $this->db->insert( $table, $extraFields + $fields, __METHOD__ );
            $id = $this->db->insertId();
            if ( $usesTemp ) {
                $callback( $id );
            }
 
            for ( $readStage = $readRange[0]; $readStage <= $readRange[1]; $readStage++ ) {
                $rstore = $this->makeStoreWithKey( $readStage, $key );
 
                $fieldRow = $this->db->selectRow(
                    $table,
                    $rstore->getFields(),
                    [ $pk => $id ],
                    __METHOD__
                );
 
                $queryInfo = $rstore->getJoin();
                $joinRow = $this->db->selectRow(
                    [ $table ] + $queryInfo['tables'],
                    $queryInfo['fields'],
                    [ $pk => $id ],
                    __METHOD__,
                    [],
                    $queryInfo['joins']
                );
 
                $this->assertComment(
                    $writeStage === MIGRATION_OLD || $readStage === MIGRATION_OLD ? $expectOld : $expect,
                    $rstore->getCommentLegacy( $this->db, $fieldRow ),
                    "w=$writeStage, r=$readStage, from getFields()"
                );
                $this->assertComment(
                    $writeStage === MIGRATION_OLD || $readStage === MIGRATION_OLD ? $expectOld : $expect,
                    $rstore->getComment( $joinRow ),
                    "w=$writeStage, r=$readStage, from getJoin()"
                );
            }
        }
    }
 
    public static function provideInsertRoundTrip() {
        $db = wfGetDB( DB_REPLICA ); // for timestamps
 
        $msgComment = new Message( 'parentheses', [ 'message comment' ] );
        $textCommentMsg = new RawMessage( '$1', [ 'text comment' ] );
        $nestedMsgComment = new Message( [ 'parentheses', 'rawmessage' ], [ new Message( 'mainpage' ) ] );
        $ipbfields = [
            'ipb_range_start' => '',
            'ipb_range_end' => '',
            'ipb_timestamp' => $db->timestamp(),
            'ipb_expiry' => $db->getInfinity(),
        ];
        $revfields = [
            'rev_page' => 42,
            'rev_text_id' => 42,
            'rev_len' => 0,
            'rev_timestamp' => $db->timestamp(),
        ];
        $comStoreComment = new CommentStoreComment(
            null, 'comment store comment', null, [ 'foo' => 'bar' ]
        );
 
        return [
            'Simple table, text comment' => [
                'ipblocks', 'ipb_reason', 'ipb_id', $ipbfields, 'text comment', null, [
                    'text' => 'text comment',
                    'message' => $textCommentMsg,
                    'data' => null,
                ]
            ],
            'Simple table, text comment with data' => [
                'ipblocks', 'ipb_reason', 'ipb_id', $ipbfields, 'text comment', [ 'message' => 42 ], [
                    'text' => 'text comment',
                    'message' => $textCommentMsg,
                    'data' => [ 'message' => 42 ],
                ]
            ],
            'Simple table, message comment' => [
                'ipblocks', 'ipb_reason', 'ipb_id', $ipbfields, $msgComment, null, [
                    'text' => '(message comment)',
                    'message' => $msgComment,
                    'data' => null,
                ]
            ],
            'Simple table, message comment with data' => [
                'ipblocks', 'ipb_reason', 'ipb_id', $ipbfields, $msgComment, [ 'message' => 42 ], [
                    'text' => '(message comment)',
                    'message' => $msgComment,
                    'data' => [ 'message' => 42 ],
                ]
            ],
            'Simple table, nested message comment' => [
                'ipblocks', 'ipb_reason', 'ipb_id', $ipbfields, $nestedMsgComment, null, [
                    'text' => '(Main Page)',
                    'message' => $nestedMsgComment,
                    'data' => null,
                ]
            ],
            'Simple table, CommentStoreComment' => [
                'ipblocks', 'ipb_reason', 'ipb_id', $ipbfields, clone $comStoreComment, [ 'baz' => 'baz' ], [
                    'text' => 'comment store comment',
                    'message' => $comStoreComment->message,
                    'data' => [ 'foo' => 'bar' ],
                ]
            ],
 
            'Revision, text comment' => [
                'revision', 'rev_comment', 'rev_id', $revfields, 'text comment', null, [
                    'text' => 'text comment',
                    'message' => $textCommentMsg,
                    'data' => null,
                ]
            ],
            'Revision, text comment with data' => [
                'revision', 'rev_comment', 'rev_id', $revfields, 'text comment', [ 'message' => 42 ], [
                    'text' => 'text comment',
                    'message' => $textCommentMsg,
                    'data' => [ 'message' => 42 ],
                ]
            ],
            'Revision, message comment' => [
                'revision', 'rev_comment', 'rev_id', $revfields, $msgComment, null, [
                    'text' => '(message comment)',
                    'message' => $msgComment,
                    'data' => null,
                ]
            ],
            'Revision, message comment with data' => [
                'revision', 'rev_comment', 'rev_id', $revfields, $msgComment, [ 'message' => 42 ], [
                    'text' => '(message comment)',
                    'message' => $msgComment,
                    'data' => [ 'message' => 42 ],
                ]
            ],
            'Revision, nested message comment' => [
                'revision', 'rev_comment', 'rev_id', $revfields, $nestedMsgComment, null, [
                    'text' => '(Main Page)',
                    'message' => $nestedMsgComment,
                    'data' => null,
                ]
            ],
            'Revision, CommentStoreComment' => [
                'revision', 'rev_comment', 'rev_id', $revfields, clone $comStoreComment, [ 'baz' => 'baz' ], [
                    'text' => 'comment store comment',
                    'message' => $comStoreComment->message,
                    'data' => [ 'foo' => 'bar' ],
                ]
            ],
        ];
    }
 
    public function testGetCommentErrors() {
        Wikimedia\suppressWarnings();
        $reset = new ScopedCallback( 'Wikimedia\restoreWarnings' );
 
        $store = $this->makeStore( MIGRATION_OLD );
        $res = $store->getComment( 'dummy', [ 'dummy' => 'comment' ] );
        $this->assertSame( '', $res->text );
        $res = $store->getComment( 'dummy', [ 'dummy' => 'comment' ], true );
        $this->assertSame( 'comment', $res->text );
 
        $store = $this->makeStore( MIGRATION_NEW );
        try {
            $store->getComment( 'dummy', [ 'dummy' => 'comment' ] );
            $this->fail( 'Expected exception not thrown' );
        } catch ( InvalidArgumentException $ex ) {
            $this->assertSame( '$row does not contain fields needed for comment dummy', $ex->getMessage() );
        }
        $res = $store->getComment( 'dummy', [ 'dummy' => 'comment' ], true );
        $this->assertSame( 'comment', $res->text );
        try {
            $store->getComment( 'dummy', [ 'dummy_id' => 1 ] );
            $this->fail( 'Expected exception not thrown' );
        } catch ( InvalidArgumentException $ex ) {
            $this->assertSame(
                '$row does not contain fields needed for comment dummy and getComment(), '
                . 'but does have fields for getCommentLegacy()',
                $ex->getMessage()
            );
        }
 
        $store = $this->makeStore( MIGRATION_NEW );
        try {
            $store->getComment( 'rev_comment', [ 'rev_comment' => 'comment' ] );
            $this->fail( 'Expected exception not thrown' );
        } catch ( InvalidArgumentException $ex ) {
            $this->assertSame(
                '$row does not contain fields needed for comment rev_comment', $ex->getMessage()
            );
        }
        $res = $store->getComment( 'rev_comment', [ 'rev_comment' => 'comment' ], true );
        $this->assertSame( 'comment', $res->text );
        try {
            $store->getComment( 'rev_comment', [ 'rev_comment_pk' => 1 ] );
            $this->fail( 'Expected exception not thrown' );
        } catch ( InvalidArgumentException $ex ) {
            $this->assertSame(
                '$row does not contain fields needed for comment rev_comment and getComment(), '
                . 'but does have fields for getCommentLegacy()',
                $ex->getMessage()
            );
        }
    }
 
    public static function provideStages() {
        return [
            'MIGRATION_OLD' => [ MIGRATION_OLD ],
            'MIGRATION_WRITE_BOTH' => [ MIGRATION_WRITE_BOTH ],
            'MIGRATION_WRITE_NEW' => [ MIGRATION_WRITE_NEW ],
            'MIGRATION_NEW' => [ MIGRATION_NEW ],
        ];
    }
 
    public function testInsertWrong( $stage ) {
        $store = $this->makeStore( $stage );
        $store->insert( $this->db, 'rev_comment', 'foo' );
    }
 
    public function testInsertWithTempTableWrong( $stage ) {
        $store = $this->makeStore( $stage );
        $store->insertWithTempTable( $this->db, 'ipb_reason', 'foo' );
    }
 
    public function testInsertWithTempTableDeprecated( $stage ) {
        $wrap = TestingAccessWrapper::newFromClass( CommentStore::class );
        $wrap->formerTempTables += [ 'ipb_reason' => '1.30' ];
 
        $this->hideDeprecated( 'CommentStore::insertWithTempTable for ipb_reason' );
        $store = $this->makeStore( $stage );
        list( $fields, $callback ) = $store->insertWithTempTable( $this->db, 'ipb_reason', 'foo' );
        $this->assertTrue( is_callable( $callback ) );
    }
 
    public function testInsertTruncation() {
        $comment = str_repeat( '💣', 16400 );
        $truncated1 = str_repeat( '💣', 63 ) . '...';
        $truncated2 = str_repeat( '💣', CommentStore::COMMENT_CHARACTER_LIMIT - 3 ) . '...';
 
        $store = $this->makeStore( MIGRATION_WRITE_BOTH );
        $fields = $store->insert( $this->db, 'ipb_reason', $comment );
        $this->assertSame( $truncated1, $fields['ipb_reason'] );
        $stored = $this->db->selectField(
            'comment', 'comment_text', [ 'comment_id' => $fields['ipb_reason_id'] ], __METHOD__
        );
        $this->assertSame( $truncated2, $stored );
    }
 
    public function testInsertTooMuchData() {
        $store = $this->makeStore( MIGRATION_WRITE_BOTH );
        $store->insert( $this->db, 'ipb_reason', 'foo', [
            'long' => str_repeat( '💣', 16400 )
        ] );
    }
 
    public function testGetStore() {
        $this->assertInstanceOf( CommentStore::class, CommentStore::getStore() );
    }
 
    public function testNewKey() {
        $this->assertInstanceOf( CommentStore::class, CommentStore::newKey( 'dummy' ) );
    }
 
}