test: add FluentValidation unit tests for all command/query validators
ValidatorTests.cs covers 21 scenarios across 4 validators: MergePdfsCommandValidator (3): - TwoOrMoreStreams passes, SingleStream fails, NullStreams fails AddAnnotationValidator (7): - Valid circle passes, FreeText without content fails, TextMarkup without style fails, invalid/valid color hex, zero page number fails, invalid rectangle (X2<X1) fails AddStampValidator (6): - Valid text stamp passes, missing Text/ImageBytes/PredefinedType each fail, opacity > 1.0 fails, invalid color hex fails ConvertToPdfACommandValidator (4): - All valid levels pass, invalid level fails, empty level fails, null stream fails
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using DocumentService.Application.AddAnnotation;
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using DocumentService.Application.AddStamp;
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using DocumentService.Application.ConvertToPdfA;
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using DocumentService.Application.MergePdfs;
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using DocumentService.Domain.Models.ValueObjects;
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using FluentAssertions;
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using FluentValidation;
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using FluentValidation.TestHelper;
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using Xunit;
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namespace DocumentService.Tests.Unit.Application.Validators;
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// ─── MergePdfsCommandValidator ────────────────────────────────────────────────
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public class MergePdfsCommandValidatorTests
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{
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private readonly MergePdfsCommandValidator _validator = new();
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[Fact]
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public void Validate_TwoOrMoreStreams_PassesValidation()
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{
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var cmd = new MergePdfsCommand
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{
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PdfStreams = [new MemoryStream(), new MemoryStream()]
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};
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_validator.TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
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}
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[Fact]
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public void Validate_SingleStream_FailsValidation()
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{
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var cmd = new MergePdfsCommand { PdfStreams = [new MemoryStream()] };
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.PdfStreams);
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}
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[Fact]
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public void Validate_NullStreams_FailsValidation()
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{
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var cmd = new MergePdfsCommand { PdfStreams = null! };
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var result = _validator.TestValidate(cmd);
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result.Errors.Should().NotBeEmpty();
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}
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}
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// ─── AddAnnotationValidator ───────────────────────────────────────────────────
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public class AddAnnotationValidatorTests
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{
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private readonly AddAnnotationValidator _validator = new();
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[Fact]
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public void Validate_ValidCircleAnnotation_PassesValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.Circle,
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PageNumber = 1,
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Rectangle = (10, 20, 200, 100)
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};
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_validator.TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
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}
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[Fact]
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public void Validate_FreeTextWithoutContent_FailsValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.FreeText,
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PageNumber = 1,
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Rectangle = (0, 0, 100, 50),
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Content = null
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.Content);
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}
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[Fact]
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public void Validate_TextMarkupWithoutStyle_FailsValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.TextMarkup,
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PageNumber = 1,
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Rectangle = (0, 0, 100, 50),
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TextMarkupStyle = null
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.TextMarkupStyle);
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}
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[Fact]
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public void Validate_InvalidColorFormat_FailsValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.Circle,
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PageNumber = 1,
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Rectangle = (0, 0, 100, 50),
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Color = "GGGGGG" // invalid hex
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.Color);
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}
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[Fact]
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public void Validate_ValidColorFormat_PassesValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.Circle,
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PageNumber = 1,
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Rectangle = (0, 0, 100, 50),
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Color = "FF0000"
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};
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_validator.TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
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}
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[Fact]
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public void Validate_ZeroPageNumber_FailsValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.Circle,
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PageNumber = 0,
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Rectangle = (0, 0, 100, 50)
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.PageNumber);
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}
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[Fact]
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public void Validate_InvalidRectangle_FailsValidation()
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{
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var cmd = new AddAnnotationCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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AnnotationType = AnnotationType.Circle,
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PageNumber = 1,
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Rectangle = (100, 100, 50, 50) // X2 < X1
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.Rectangle);
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}
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}
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// ─── AddStampValidator ────────────────────────────────────────────────────────
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public class AddStampValidatorTests
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{
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private readonly AddStampValidator _validator = new();
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[Fact]
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public void Validate_ValidTextStamp_PassesValidation()
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{
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var cmd = new AddStampCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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StampType = StampType.Text,
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Position = (100, 200),
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Text = "DRAFT"
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};
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_validator.TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
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}
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[Fact]
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public void Validate_TextStampWithoutText_FailsValidation()
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{
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var cmd = new AddStampCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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StampType = StampType.Text,
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Position = (100, 200),
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Text = null
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.Text);
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}
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[Fact]
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public void Validate_ImageStampWithoutBytes_FailsValidation()
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{
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var cmd = new AddStampCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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StampType = StampType.Image,
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Position = (0, 0),
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ImageBytes = null
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.ImageBytes);
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}
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[Fact]
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public void Validate_PredefinedStampWithoutType_FailsValidation()
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{
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var cmd = new AddStampCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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StampType = StampType.Predefined,
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Position = (0, 0),
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PredefinedType = null
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.PredefinedType);
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}
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[Fact]
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public void Validate_OpacityAboveOne_FailsValidation()
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{
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var cmd = new AddStampCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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StampType = StampType.Text,
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Position = (0, 0),
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Text = "TEST",
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Opacity = 1.5
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.Opacity!.Value);
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}
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[Fact]
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public void Validate_InvalidColorHex_FailsValidation()
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{
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var cmd = new AddStampCommand
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{
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PdfStream = new MemoryStream("%PDF"u8.ToArray()),
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StampType = StampType.Text,
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Position = (0, 0),
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Text = "TEST",
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Color = "XYZ"
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};
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.Color!);
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}
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}
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// ─── ConvertToPdfACommandValidator ───────────────────────────────────────────
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public class ConvertToPdfAValidatorTests
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{
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private readonly ConvertToPdfACommandValidator _validator = new();
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[Fact]
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public void Validate_ValidPdfALevel_PassesValidation()
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{
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foreach (var level in new[] { "PDF/A-1b", "PDF/A-2b", "PDF/A-3b", "PDF/A-3u" })
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{
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var cmd = new ConvertToPdfACommand { PdfStream = new MemoryStream(), PdfALevel = level };
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_validator.TestValidate(cmd).ShouldNotHaveAnyValidationErrors();
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}
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}
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[Fact]
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public void Validate_InvalidPdfALevel_FailsValidation()
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{
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var cmd = new ConvertToPdfACommand { PdfStream = new MemoryStream(), PdfALevel = "PDF/A-99z" };
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.PdfALevel);
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}
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[Fact]
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public void Validate_EmptyPdfALevel_FailsValidation()
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{
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var cmd = new ConvertToPdfACommand { PdfStream = new MemoryStream(), PdfALevel = "" };
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.PdfALevel);
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}
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[Fact]
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public void Validate_NullStream_FailsValidation()
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{
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var cmd = new ConvertToPdfACommand { PdfStream = null!, PdfALevel = "PDF/A-1b" };
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_validator.TestValidate(cmd).ShouldHaveValidationErrorFor(x => x.PdfStream);
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}
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}
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