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tests/TrainingPlanner.Tests/ExerciseImportTests.cs

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+using TrainingPlanner.Application;
+
+namespace TrainingPlanner.Tests;
+
+public class ExerciseImportTests
+{
+    private readonly ExerciseImportOptions options = new() { MaxRows = 1000, MaxClipboardCharacters = 100000 };
+
+    [Fact]
+    public void ClipboardPreservesEmptyCellsAndExcelQuotedValues()
+    {
+        var rows = new ClipboardTableParser(options).Parse("\"Жим \"\"узкий\"\"\nсидя\"\thttps://example.com/video\r\nТяга\t\r\n\t\r\n");
+        Assert.Equal(2, rows.Count);
+        Assert.Equal("Жим \"узкий\"\nсидя", rows[0][0]);
+        Assert.Equal("https://example.com/video", rows[0][1]);
+        Assert.Equal("", rows[1][1]);
+    }
+
+    [Fact]
+    public void ClipboardHandlesLargePasteAndAllLineEndings()
+    {
+        var parser = new ClipboardTableParser(options);
+        Assert.Equal(500, parser.Parse(string.Join('\n', Enumerable.Repeat("Упражнение\thttps://example.com", 500))).Count);
+        Assert.Equal(3, parser.Parse("А\rБ\nВ\r\n").Count);
+        Assert.Empty(parser.Parse("\r\n\t\r\n"));
+    }
+
+    [Fact]
+    public void ClipboardRejectsUnclosedQuotesAndConfiguredLimits()
+    {
+        var parser = new ClipboardTableParser(new ExerciseImportOptions { MaxRows = 1, MaxClipboardCharacters = 20 });
+        Assert.Throws<InvalidOperationException>(() => parser.Parse("\"Открытая ячейка"));
+        Assert.Throws<InvalidOperationException>(() => parser.Parse("А\nБ"));
+        Assert.Throws<InvalidOperationException>(() => parser.Parse(new string('a', 21)));
+    }
+
+    [Fact]
+    public void ValidationSkipsBlankRowsAndAllowsMissingVideo()
+    {
+        var rows = new ExerciseImportValidator(options).Validate([
+            new(), new() { Name = " Тяга ", VideoUrl = " " },
+            new() { Name = "Жим", VideoUrl = " https://example.com " }]);
+        Assert.Equal(2, rows.Count);
+        Assert.Equal("Тяга", rows[0].Name);
+        Assert.Equal("", rows[0].VideoUrl);
+        Assert.Equal("https://example.com", rows[1].VideoUrl);
+    }
+
+    [Fact]
+    public void ValidationReportsOriginalRowAndRejectsUnsafeLinks()
+    {
+        var validator = new ExerciseImportValidator(options);
+        var error = Assert.Throws<InvalidOperationException>(() => validator.Validate([
+            new(), new() { Name = "Жим", VideoUrl = "javascript:alert(1)" }]));
+        Assert.Contains("Строка 2", error.Message);
+        Assert.Throws<InvalidOperationException>(() => validator.Validate([new() { VideoUrl = "https://example.com" }]));
+        Assert.Throws<InvalidOperationException>(() => validator.Validate([new()]));
+    }
+}