import {TranslationMessagesFileFactory, ITranslationMessagesFile, ITransUnit, INormalizedMessage,
    STATE_NEW, STATE_FINAL} from '../api/index';
import * as fs from 'fs';
import {DOMParser} from 'xmldom';
import {DOMUtilities} from './dom-utilities';

/**
 * Created by martin on 28.04.2017.
 * Testcases for xmb files.
 */

describe('ngx-i18nsupport-lib xtb test spec', () => {

    const SRCDIR = 'test/testdata/i18n/';

    const ENCODING = 'UTF-8';

    /**
     * Helper function to read Xtb from 2 Files, the xtb and the master
     */
    function readFile(path: string, masterPath?: string): ITranslationMessagesFile {
        const content = fs.readFileSync(path, ENCODING);
        if (masterPath) {
            const masterContent = fs.readFileSync(masterPath, ENCODING);
            const optionalMaster = {xmlContent: masterContent, path: masterPath, encoding: ENCODING};
            return TranslationMessagesFileFactory.fromFileContent('xtb', content, path, ENCODING, optionalMaster);
        } else {
            return TranslationMessagesFileFactory.fromFileContent('xtb', content, path, ENCODING, null);
        }
    }

    /**
     * Helper function to read file with unknown format
     */
    function readUnknownFormatFile(path: string, masterPath?: string): ITranslationMessagesFile {
        const content = fs.readFileSync(path, ENCODING);
        if (masterPath) {
            const masterContent = fs.readFileSync(masterPath, ENCODING);
            const optionalMaster = {xmlContent: masterContent, path: masterPath, encoding: ENCODING};
            return TranslationMessagesFileFactory.fromUnknownFormatFileContent(content, path, ENCODING, optionalMaster);
        } else {
            return TranslationMessagesFileFactory.fromUnknownFormatFileContent(content, path, ENCODING, null);
        }
    }

    describe('xtb format tests', () => {
        const MASTER_1_XMB = SRCDIR + 'ngExtractedMaster1.xmb';
        const MASTER_DE_XMB = SRCDIR + 'ngExtractedMaster1.de.xmb';
        const TRANSLATION_EN_XTB = SRCDIR + 'ngExtractedMaster1.en.xtb';

        const ID_MY_FIRST = '2047558209369508311'; // an ID from ngExtractedMaster1.xmb
        const ID_WITH_PLACEHOLDER = '9030312858648510700';
        const ID_WITH_MEANING_AND_DESCRIPTION = '3274258156935474372'; // ID with placeholders and source element
        const ID_WITH_NO_SOURCEREFS = 'no_sourceref_test'; // an ID with no source elements
        const ID_WITH_TWO_SOURCEREFS = '4371668001355139802'; // an ID with 2 source elements
        const ID_WITH_LINEBREAK = '7149517499881679376';
        const ID_WITH_TAGS = '7609655310648429098';
        const ID_WITH_TAG_STRANGE = '7610784844464920497';
        const ID_TO_MERGE = 'unittomerge';
        const ID_ICU_PLURAL = '157616252019374389';
        const ID_ICU_SELECT = '4002068837191765530';
        const ID_ICU_SELECT_2 = '4002068837191765531';
        const ID_ICU_EMBEDDED_TAGS = '6710804210857077393';
        const ID_CONTAINS_ICU = '2747218257718409559';
        const ID_CONTAINS_TWO_ICU = 'complextags.icuTwoICU';
        const ID_WITH_BR_TAG = '3944017551463298929';
        const ID_WITH_IMG_TAG = '705837031073461246';
        const ID_UNTRANSLATED_DESCRIPTION = '7499557905529977372';

        it('should read xtb file', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB);
            expect(file).toBeTruthy();
            expect(file.fileType()).toBe('XTB');
            const tu: ITransUnit = file.transUnitWithId(ID_MY_FIRST);
            expect(tu).toBeTruthy();
            expect(tu.sourceContent()).toBeFalsy();
            expect(tu.targetContent()).toBe('My first I18N Application');
        });

        it('should emit warnings', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB);
            expect(file.warnings().length).toBe(1);
            expect(file.warnings()[0]).toContain('msg without "id"');
        });

        it('should emit warnings, if master does not fit', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            expect(file.warnings().length).toBe(2);
            expect(file.warnings()[0]).toContain('msg without "id"');
            expect(file.warnings()[1]).toContain('Check if it is the correct master');
        });

        it('should count units', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB);
            expect(file.numberOfTransUnits()).toBe(18);
            expect(file.numberOfTransUnitsWithMissingId()).toBe(1);
            expect(file.numberOfUntranslatedTransUnits()).toBe(file.numberOfTransUnits());
            expect(file.numberOfReviewedTransUnits()).toBe(0);
        });

        it('should return source language', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB);
            expect(file.sourceLanguage()).toBeFalsy(); // no master, no source!
            const file2: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            expect(file2.sourceLanguage()).toBe('de');
        });

        it('should return target language', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            expect(file.targetLanguage()).toBe('en');
        });

        it('should loop over all trans units', () => {
            const translatedFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            let count = 0;
            translatedFile.forEachTransUnit((tu: ITransUnit) => {
                expect(tu).toBeTruthy();
                count++;
            });
            expect(count).toBeGreaterThan(4);
        });

        it('should ignore change source content', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_BR_TAG);
            expect(tu).toBeTruthy();
            expect(tu.sourceContent()).toBeTruthy();
            const oldValue = tu.sourceContent();
            expect(tu.supportsSetSourceContent()).toBeFalsy();
            const changedMessage = 'a changed source';
            tu.setSourceContent(changedMessage);
            expect(tu.sourceContent()).toBe(oldValue);
        });

        it('should read meaning and description of tu', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_MEANING_AND_DESCRIPTION);
            expect(tu).toBeTruthy();
            expect(tu.meaning()).toBe('dateservice.monday');
            expect(tu.description()).toBe('ngx-translate');
        });

        it('should ignore change description', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_MEANING_AND_DESCRIPTION);
            expect(tu).toBeTruthy();
            expect(tu.description()).toBeTruthy();
            const oldValue = tu.description();
            expect(tu.supportsSetDescriptionAndMeaning()).toBeFalsy();
            const changedMessage = 'a changed description';
            tu.setDescription(changedMessage);
            expect(tu.description()).toBe(oldValue);
        });

        it('should ignore change meaning', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_MEANING_AND_DESCRIPTION);
            expect(tu).toBeTruthy();
            expect(tu.meaning()).toBeTruthy();
            const oldValue = tu.meaning();
            expect(tu.supportsSetDescriptionAndMeaning()).toBeFalsy();
            const changedMessage = 'a changed description';
            tu.setMeaning(changedMessage);
            expect(tu.meaning()).toBe(oldValue);
        });

        it('should not have notes and should not allow to change them', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_MEANING_AND_DESCRIPTION);
            expect(tu).toBeTruthy();
            expect(tu.notes()).toEqual([]);
            expect(tu.supportsSetNotes()).toBeFalsy();
            tu.setNotes([{from: 'testcase', text: 'a note that should not be stored'}]);
            expect(tu.notes()).toEqual([]);
        });

        it('should ignore source attribute in sourceContent', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_PLACEHOLDER);
            expect(tu).toBeTruthy();
            expect(tu.sourceContent())
                .toBe('Eintrag <ph name="INTERPOLATION"><ex>INTERPOLATION</ex></ph>' +
                    ' von <ph name="INTERPOLATION_1"><ex>INTERPOLATION_1</ex></ph> hinzugefügt.');
        });

        it('should return empty source references array if source not set', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_NO_SOURCEREFS);
            expect(tu).toBeTruthy();
            expect(tu.sourceReferences().length).toBe(0);
        });

        it('should return source reference', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_PLACEHOLDER);
            expect(tu).toBeTruthy();
            expect(tu.sourceReferences().length).toBe(1);
            expect(tu.sourceReferences()[0].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu.sourceReferences()[0].linenumber).toBe(6);
        });

        it('should return more than one source references', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu).toBeTruthy();
            expect(tu.sourceReferences().length).toBe(2);
            expect(tu.sourceReferences()[0].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu.sourceReferences()[0].linenumber).toBe(2);
            expect(tu.sourceReferences()[1].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu.sourceReferences()[1].linenumber).toBe(3);
        });

        it('should return source reference with more than 1 linenumber', () => {
            // if the text in template spreads over more than 1 line, there is a linenumber format like 7,8 used
            // in this case, linenumber is the first line (here 7).
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_LINEBREAK);
            expect(tu).toBeTruthy();
            expect(tu.sourceReferences().length).toBe(1);
            expect(tu.sourceReferences()[0].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu.sourceReferences()[0].linenumber).toBe(7);
        });

        it ('should run through 3 different states while translating', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_MY_FIRST);
            expect(tu).toBeTruthy();
            expect(tu.targetState()).toBe(STATE_FINAL);
            // TODO state handling xmb to be improved
            tu.translate('');
            expect(tu.targetState()).toBe(STATE_NEW);
            tu.translate('a translation');
            expect(tu.targetState()).toBe(STATE_FINAL);
        });

        it('should not change source reference, because it is not supported in xtb', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu).toBeTruthy();
            expect(tu.sourceReferences().length).toBe(2);
            expect(tu.supportsSetSourceReferences()).toBeFalsy();
            tu.setSourceReferences([{sourcefile: 'x', linenumber: 1}]);
            expect(tu.sourceReferences().length).toBe(2); // shall be unchanged
            const masterContent = {xmlContent: fs.readFileSync(MASTER_DE_XMB, ENCODING), path: MASTER_DE_XMB, encoding: 'UTF-8'};
            const file2: ITranslationMessagesFile =
                TranslationMessagesFileFactory.fromUnknownFormatFileContent(file.editedContent(), null, null, masterContent);
            const tu2: ITransUnit = file2.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu2.sourceReferences().length).toBe(2);
            expect(tu2.sourceReferences()[0].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu2.sourceReferences()[0].linenumber).toBe(2);
            expect(tu2.sourceReferences()[1].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu2.sourceReferences()[1].linenumber).toBe(3);
        });

        it('should not change source reference when translating', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu).toBeTruthy();
            expect(tu.sourceReferences().length).toBe(2);
            tu.translate('a translated value');
            const masterContent = {xmlContent: fs.readFileSync(MASTER_DE_XMB, ENCODING), path: MASTER_DE_XMB, encoding: 'UTF-8'};
            const file2: ITranslationMessagesFile =
                TranslationMessagesFileFactory.fromUnknownFormatFileContent(file.editedContent(), null, null, masterContent);
            const tu2: ITransUnit = file2.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu2.targetContent()).toBe('a translated value');
            expect(tu2.sourceReferences().length).toBe(2);
            expect(tu2.sourceReferences()[0].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu2.sourceReferences()[0].linenumber).toBe(2);
            expect(tu2.sourceReferences()[1].sourcefile).toBe('S:/experimente/sampleapp41/src/app/app.component.ts');
            expect(tu2.sourceReferences()[1].linenumber).toBe(3);
        });

        it('should normalize placeholders to {{0}} etc', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_PLACEHOLDER);
            expect(tu.targetContentNormalized().asDisplayString()).toBe('Entry {{0}} of {{1}} added.');
        });

        it('should normalize embedded html tags', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_TAGS);
            expect(tu.targetContentNormalized().asDisplayString()).toBe('This message is <b><strong>VERY IMPORTANT</strong></b>');
        });

        it('should normalize embedded html tags', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_TAG_STRANGE);
            expect(tu.targetContentNormalized().asDisplayString()).toBe('This message is <strange>{{0}}</strange>');
        });

        it('should normalize empty html tag br', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_BR_TAG);
            expect(tu.sourceContentNormalized().asDisplayString()).toBe('Dieser Text enthält<br>einen Zeilenumbruch per HTML-br-Element.');
            const translation = tu.sourceContentNormalized().translate('This text contains<br> a linebreak');
            tu.translate(translation);
            expect(tu.targetContent()).toBe('This text contains<ph name="LINE_BREAK"><ex>&lt;br></ex></ph> a linebreak');
        });

        it('should normalize empty html tag img', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_IMG_TAG);
            expect(tu.sourceContentNormalized().asDisplayString()).toBe('Dieser Text enthält ein Bild <img> mitt en in der Nachricht');
            const translation = tu.sourceContentNormalized().translate('This text contains an img <img> in the message');
            tu.translate(translation);
            expect(tu.targetContent()).toBe('This text contains an img <ph name="TAG_IMG"><ex>&lt;img></ex></ph> in the message');
        });

        it('should remove a transunit by id', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu).toBeTruthy();
            file.removeTransUnitWithId(ID_WITH_TWO_SOURCEREFS);
            const file2: ITranslationMessagesFile =
                TranslationMessagesFileFactory.fromUnknownFormatFileContent(file.editedContent(), null, null);
            const tu2: ITransUnit = file2.transUnitWithId(ID_WITH_TWO_SOURCEREFS);
            expect(tu2).toBeFalsy(); // should not exist any more
        });

        it ('should copy a transunit from file a to file b', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_TO_MERGE);
            expect(tu).toBeTruthy();
            const targetFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeFalsy();
            const newTu = targetFile.importNewTransUnit(tu, false, true);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeTruthy();
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toEqual(newTu);
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(targetFile.editedContent(), null, null);
            const targetTu = changedTargetFile.transUnitWithId(ID_TO_MERGE);
            expect(targetTu.targetContent()).toBe('Test for merging units');
        });

        it ('should not copy source to target for non default lang if not wanted', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_UNTRANSLATED_DESCRIPTION);
            expect(tu).toBeTruthy();
            const isDefaultLang = false;
            const copyContent = false;
            const file2: ITranslationMessagesFile = file.createTranslationFileForLang('xy', null, isDefaultLang, copyContent);
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(file2.editedContent(), null, null);
            const tu2a: ITransUnit = changedTargetFile.transUnitWithId(ID_UNTRANSLATED_DESCRIPTION);
            expect(tu2a.targetContent()).toBeFalsy();
            const tu2: ITransUnit = file2.transUnitWithId(ID_UNTRANSLATED_DESCRIPTION);
            expect(tu2.targetContent()).toBeFalsy();
        });

        it ('should copy a transunit from file a to file b and leave content blank (xliffmerge #103)', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_TO_MERGE);
            expect(tu).toBeTruthy();
            const targetFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeFalsy();
            // flag copyContent set to false here...
            const newTu = targetFile.importNewTransUnit(tu, false, false);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeTruthy();
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toEqual(newTu);
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(targetFile.editedContent(), null, null);
            const targetTu = changedTargetFile.transUnitWithId(ID_TO_MERGE);
            expect(targetTu.targetContent()).toBe('');
        });

        it ('should copy a transunit to a specified position (#53)', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_TO_MERGE);
            expect(tu).toBeTruthy();
            const targetFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeFalsy();
            const ID_EXISTING = '4371668001355139802';
            const existingTu = targetFile.transUnitWithId(ID_EXISTING);
            expect(existingTu).toBeTruthy();
            const newTu = targetFile.importNewTransUnit(tu, false, true, existingTu);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeTruthy();
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toEqual(newTu);
            const doc: Document = new DOMParser().parseFromString(targetFile.editedContent());
            const existingElem = DOMUtilities.getElementByTagNameAndId(doc, 'translation', ID_EXISTING);
            const newElem = DOMUtilities.getElementByTagNameAndId(doc, 'translation', ID_TO_MERGE);
            expect(DOMUtilities.getElementFollowingSibling(existingElem)).toEqual(newElem);
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(targetFile.editedContent(), null, null);
            const targetTu = changedTargetFile.transUnitWithId(ID_TO_MERGE);
            expect(targetTu.targetContent()).toBe('Test for merging units');
        });

        it ('should copy a transunit to first position (#53)', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_TO_MERGE);
            expect(tu).toBeTruthy();
            const targetFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeFalsy();
            // when importNewTransUnit is called with null, new unit will be added at first position
            const newTu = targetFile.importNewTransUnit(tu, false, true, null);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeTruthy();
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toEqual(newTu);
            const doc: Document = new DOMParser().parseFromString(targetFile.editedContent());
            const newElem = DOMUtilities.getElementByTagNameAndId(doc, 'translation', ID_TO_MERGE);
            expect(newElem).toBeTruthy();
            expect(DOMUtilities.getElementPrecedingSibling(newElem)).toBeFalsy();
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(targetFile.editedContent(), null, null);
            const targetTu = changedTargetFile.transUnitWithId(ID_TO_MERGE);
            expect(targetTu.targetContent()).toBe('Test for merging units');
        });

        it ('should copy a transunit from file a to file b and set a praefix and suffix', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_TO_MERGE);
            expect(tu).toBeTruthy();
            const targetFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            targetFile.setNewTransUnitTargetPraefix('%%');
            targetFile.setNewTransUnitTargetSuffix('!!');
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeFalsy();
            const newTu = targetFile.importNewTransUnit(tu, false, true);
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toBeTruthy();
            expect(targetFile.transUnitWithId(ID_TO_MERGE)).toEqual(newTu);
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(targetFile.editedContent(), null, null);
            const targetTu = changedTargetFile.transUnitWithId(ID_TO_MERGE);
            expect(targetTu.targetContent()).toBe('%%Test for merging units!!');
        });

        it ('should copy a transunit from file a to file b, but should not set a praefix and suffix for ICU messages', () => {
            const file: ITranslationMessagesFile = readUnknownFormatFile(MASTER_1_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_ICU_SELECT_2);
            expect(tu).toBeTruthy();
            const targetFile: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_1_XMB);
            targetFile.setNewTransUnitTargetPraefix('%%');
            targetFile.setNewTransUnitTargetSuffix('!!');
            expect(targetFile.transUnitWithId(ID_ICU_SELECT_2)).toBeFalsy();
            const newTu = targetFile.importNewTransUnit(tu, false, true);
            expect(targetFile.transUnitWithId(ID_ICU_SELECT_2)).toBeTruthy();
            expect(targetFile.transUnitWithId(ID_ICU_SELECT_2)).toEqual(newTu);
            const changedTargetFile = TranslationMessagesFileFactory.fromUnknownFormatFileContent(targetFile.editedContent(), null, null);
            const targetTu = changedTargetFile.transUnitWithId(ID_ICU_SELECT_2);
            expect(targetTu.targetContent()).not.toContain('%%');
            expect(targetTu.targetContent()).not.toContain('!!');
        });

        it ('should translate using NormalizedMessage (plain text case, no placeholders, no markup)', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_MY_FIRST);
            expect(tu).toBeTruthy();
            const translationString = 'Anwendung läuft';
            // first translate
            const translation: INormalizedMessage = tu.sourceContentNormalized().translate(translationString);
            tu.translate(translation);
            expect(tu.targetContent()).toBe(translationString);
            const file2: ITranslationMessagesFile =
                TranslationMessagesFileFactory.fromUnknownFormatFileContent(file.editedContent(), null, null);
            const tu2: ITransUnit = file2.transUnitWithId(ID_MY_FIRST);
            expect(tu2.targetContentNormalized().asDisplayString()).toBe(translationString);
        });

        it('should translate plural ICU', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_ICU_PLURAL);
            expect(tu).toBeTruthy();
            const normalizedMessage = tu.sourceContentNormalized();
            expect(normalizedMessage.asDisplayString()).toBe('<ICU-Message/>');
            const translatedMessage = normalizedMessage.translateICUMessage({'=0': 'nothing'});
            tu.translate(translatedMessage);
            const icuMessage = tu.targetContentNormalized().getICUMessage();
            expect(icuMessage).toBeTruthy();
            expect(icuMessage.isPluralMessage()).toBeTruthy();
            expect(icuMessage.isSelectMessage()).toBeFalsy();
            expect(icuMessage.getCategories().length).toBe(3);
            expect(icuMessage.getCategories()[0].getCategory()).toBe('=0');
            expect(icuMessage.getCategories()[0].getMessageNormalized().asDisplayString()).toBe('nothing');
            expect(tu.targetContent()).toBe('{VAR_PLURAL, plural, =0 {nothing} =1 {1 Schaf} other {x Schafe}}');
        });

        it('should translate ICU with embedded tags', () => {
            const file: ITranslationMessagesFile = readFile(TRANSLATION_EN_XTB, MASTER_DE_XMB);
            const tu: ITransUnit = file.transUnitWithId(ID_ICU_EMBEDDED_TAGS);
            const normalizedMessage = tu.sourceContentNormalized();
            expect(normalizedMessage.asDisplayString()).toBe('<ICU-Message/>');
            const translatedMessage = normalizedMessage.translateICUMessage({'wert1': '<em>changed</em>'});
            tu.translate(translatedMessage);
            const icuMessage = tu.targetContentNormalized().getICUMessage();
            expect(icuMessage).toBeTruthy();
            expect(icuMessage.isPluralMessage()).toBeFalsy();
            expect(icuMessage.isSelectMessage()).toBeTruthy();
            expect(icuMessage.getCategories().length).toBe(3);
            expect(icuMessage.getCategories()[1].getCategory()).toBe('wert1');
            expect(icuMessage.getCategories()[1].getMessageNormalized().asDisplayString()).toBe('<em>changed</em>');
            expect(tu.targetContent())
                .toContain('wert1 {<ph name="START_EMPHASISED_TEXT"><ex>' +
                    '&lt;em></ex></ph>changed<ph name="CLOSE_EMPHASISED_TEXT"><ex>&lt;/em></ex></ph>}');
            // TODO find warnings in embedded message, known limitation in the moment.
            //            const warnings = icuMessage.getCategories()[1].getMessageNormalized().validateWarnings();
            //            expect(warnings).toBeTruthy();
        });

    });
});