using AIStudio.Tools; namespace AIStudio.Tests.Tools; /// /// Checks what AI Studio assumes about the readers of the formats it writes. /// [TestFixture] public sealed class FileExportFormatTests { [Test] public void OnlyTheTwoOfficeFormatsRefuseAPageInALocalLink() { Assert.Multiple(() => { Assert.That(FileExportFormat.MICROSOFT_WORD.FollowsPageAnchors(), Is.False, "Word looks for a file whose name ends in the fragment, finds none, and refuses the link."); Assert.That(FileExportFormat.OPEN_DOCUMENT_TEXT.FollowsPageAnchors(), Is.False, "LibreOffice does the same, verified on 2026-09-15 with an exported .odt."); Assert.That(FileExportFormat.HTML.FollowsPageAnchors(), Is.True, "A browser opens the document on the page the fragment names."); Assert.That(FileExportFormat.MARKDOWN.FollowsPageAnchors(), Is.True); Assert.That(FileExportFormat.LATEX.FollowsPageAnchors(), Is.True); }); } [Test] public void EveryFormatAnAnswerIsWrittenAsHasAnAnswerHere() { // Whoever adds a format decides what its reader can follow, rather than inheriting an // assumption. This fails for a format which nobody thought about, because the list below // has to name it: Assert.That(FileExportFormatExtensions.ANSWER_FORMATS, Is.EquivalentTo(new[] { FileExportFormat.MICROSOFT_WORD, FileExportFormat.OPEN_DOCUMENT_TEXT, FileExportFormat.LATEX, FileExportFormat.MARKDOWN, FileExportFormat.HTML, }), "A format was added to or removed from the export menu: say in FollowsPageAnchors whether its reader follows a page in a local link, then name it here."); } [TestCase("Q3: Umsatz/Planung?", FileExportFormat.HTML, "Q3 Umsatz Planung.html", Description = "A chat is named after the first words of its question, and those may hold anything.")] [TestCase("Notes for the meeting.", FileExportFormat.MARKDOWN, "Notes for the meeting.md", Description = "Windows drops a trailing dot anyway.")] [TestCase(null, FileExportFormat.MICROSOFT_WORD, "export.docx")] [TestCase(" ", FileExportFormat.LATEX, "export.tex", Description = "A name made of nothing is no name.")] public void TheSaveDialogSuggestsAUsableFileName(string? name, FileExportFormat format, string expectedFileName) { Assert.That(format.ToSuggestedFileName(name), Is.EqualTo(expectedFileName)); } [Test] public void AnOverlongFileNameIsShortened() { var fileName = FileExportFormat.HTML.ToSuggestedFileName(new string('a', 100)); Assert.That(fileName, Is.EqualTo($"{new string('a', 60)}.html"), "The first ten words of a question easily outgrow what a dialog shows."); } [Test] public void OnlyAWebPageNeedsAPageTitle() { Assert.Multiple(() => { Assert.That(FileExportFormat.HTML.NeedsPageTitle(), Is.True, "Without one, the browser tab shows the random name of the temporary file Pandoc read."); Assert.That(FileExportFormat.MICROSOFT_WORD.NeedsPageTitle(), Is.False, "Word would keep it as a document property nobody asked for."); Assert.That(FileExportFormat.OPEN_DOCUMENT_TEXT.NeedsPageTitle(), Is.False, "The same goes for an OpenDocument file."); Assert.That(FileExportFormat.LATEX.NeedsPageTitle(), Is.False); }); } [TestCase("html", FileExportFormat.HTML)] [TestCase("latex", FileExportFormat.LATEX)] [TestCase("tex", FileExportFormat.LATEX)] [TestCase("markdown", FileExportFormat.MARKDOWN)] [TestCase("md", FileExportFormat.MARKDOWN)] [TestCase("csv", FileExportFormat.CSV)] [TestCase("tsv", FileExportFormat.TSV)] [TestCase("HTML", FileExportFormat.HTML, Description = "Models do not agree on the case.")] [TestCase("LaTeX", FileExportFormat.LATEX)] [TestCase("CSV", FileExportFormat.CSV)] [TestCase(" md ", FileExportFormat.MARKDOWN, Description = "Space around the name is no part of it.")] public void AFenceLanguageNamesItsFormat(string language, FileExportFormat expectedFormat) { Assert.Multiple(() => { Assert.That(FileExportFormatExtensions.TryFromCodeFenceLanguage(language, out var format), Is.True); Assert.That(format, Is.EqualTo(expectedFormat)); Assert.That(format.IsPlainText(), Is.True, "A code block holds text, so the export writes it as it is."); }); } [Test] public void OnlyTheTwoOfficeFormatsAreNoPlainText() { Assert.Multiple(() => { Assert.That(FileExportFormat.MICROSOFT_WORD.IsPlainText(), Is.False, "A Word file is an archive, and writing text into one breaks it."); Assert.That(FileExportFormat.OPEN_DOCUMENT_TEXT.IsPlainText(), Is.False); Assert.That(FileExportFormat.NONE.IsPlainText(), Is.False, "No format means no file."); Assert.That(FileExportFormat.UNKNOWN.IsPlainText(), Is.False); Assert.That(FileExportFormat.HTML.IsPlainText(), Is.True, "A page the model wrote is a finished file, even though an entire answer needs Pandoc to become one."); Assert.That(FileExportFormat.LATEX.IsPlainText(), Is.True); Assert.That(FileExportFormat.MARKDOWN.IsPlainText(), Is.True); Assert.That(FileExportFormat.CSV.IsPlainText(), Is.True); Assert.That(FileExportFormat.TSV.IsPlainText(), Is.True); }); } [TestCase("css", TestName = "A language AI Studio writes no file for")] [TestCase("docx", TestName = "A format no code block can hold")] [TestCase("", TestName = "A fence without a language")] [TestCase(null, TestName = "A fence Markdig read no language for")] public void AnyOtherFenceLanguageNamesNoFormat(string? language) { Assert.Multiple(() => { Assert.That(FileExportFormatExtensions.TryFromCodeFenceLanguage(language, out var format), Is.False); Assert.That(format, Is.EqualTo(FileExportFormat.NONE)); }); } [TestCase(FileExportFormat.HTML)] [TestCase(FileExportFormat.MARKDOWN)] public void AnHtmlCommentEndsWhereItShouldAndNowhereElse(FileExportFormat format) { var found = format.TryToComment("A page titled --> Start, and one titled --!> Next", out var comment); Assert.Multiple(() => { Assert.That(found, Is.True); Assert.That(comment, Does.StartWith("", StringComparison.Ordinal), Is.EqualTo(comment.Length - 3), "Only the end of the comment may end it; the title would spill onto the page otherwise."); Assert.That(comment, Does.Not.Contain("--!>"), "A browser ends a comment there as well."); Assert.That(comment, Does.Contain("Start").And.Contain("Next"), "The title stays readable."); }); } [Test] public void AnHtmlCommentKeepsTheDashesOfAnAddress() { FileExportFormat.HTML.TryToComment("https://xn--mnchen-3ya.de/", out var comment); Assert.That(comment, Does.Contain("https://xn--mnchen-3ya.de/"), "A domain with an umlaut is written with two dashes, and the link has to keep working."); } [Test] public void EveryLineOfALatexCommentIsOne() { var found = FileExportFormat.LATEX.TryToComment(Lines("# Sources", string.Empty, "- [1] A title with 100 % and a_b"), out var comment); Assert.Multiple(() => { Assert.That(found, Is.True); Assert.That(comment.Split(Environment.NewLine), Is.EqualTo(new[] { "% # Sources", "%", "% - [1] A title with 100 % and a_b" }), "LaTeX has no end of a comment, only the end of a line."); }); } [TestCase(FileExportFormat.CSV)] [TestCase(FileExportFormat.TSV)] [TestCase(FileExportFormat.MICROSOFT_WORD)] public void AFormatWithoutCommentsSaysSo(FileExportFormat format) { Assert.Multiple(() => { Assert.That(format.TryToComment("A text.", out var comment), Is.False); Assert.That(comment, Is.Empty); }); } private static string Lines(params string[] lines) => string.Join(Environment.NewLine, lines); }