Fix Checkbox field appearance stream for PDF/A

DEVSIX-2172

Autoported commit.
Original commit hash: [def5fdf6e]

Author: kevinwillems1993

itext.tests/itext.pdfa.tests/itext/pdfa/PdfA1bCheckfieldAppearanceTest.cs

@@ -0,0 +1,75 @@
+using System;
+using System.IO;
+using iText.Forms;
+using iText.Forms.Fields;
+using iText.Kernel.Colors;
+using iText.Kernel.Geom;
+using iText.Kernel.Pdf;
+using iText.Kernel.Utils;
+using iText.Test;
+
+namespace iText.Pdfa {
+    public class PdfA1bCheckfieldAppearanceTest : ExtendedITextTest {
+        public static readonly String sourceFolder = iText.Test.TestUtil.GetParentProjectDirectory(NUnit.Framework.TestContext
+            .CurrentContext.TestDirectory) + "/resources/itext/pdfa/";
+
+        public static readonly String cmpFolder = iText.Test.TestUtil.GetParentProjectDirectory(NUnit.Framework.TestContext
+            .CurrentContext.TestDirectory) + "/resources/itext/pdfa/cmp/PdfA1bCheckfieldAppearanceTest/";
+
+        public static readonly String destinationFolder = NUnit.Framework.TestContext.CurrentContext.TestDirectory
+             + "/test/itext/pdfa/PdfA1bCheckfieldAppearanceTest/";
+
+        [NUnit.Framework.OneTimeSetUp]
+        public static void BeforeClass() {
+            CreateDestinationFolder(destinationFolder);
+        }
+
+        /// <exception cref="System.IO.IOException"/>
+        /// <exception cref="System.Exception"/>
+        [NUnit.Framework.Test]
+        public virtual void PdfA1bCheckFieldOffAppearanceTest() {
+            String name = "pdfA1b_checkFieldOffAppearance";
+            String outPath = destinationFolder + name + ".pdf";
+            String cmpPath = cmpFolder + "cmp_" + name + ".pdf";
+            String diff = "diff_" + name + "_";
+            PdfWriter writer = new PdfWriter(outPath);
+            Stream @is = new FileStream(sourceFolder + "sRGB Color Space Profile.icm", FileMode.Open, FileAccess.Read);
+            PdfADocument doc = new PdfADocument(writer, PdfAConformanceLevel.PDF_A_1B, new PdfOutputIntent("Custom", ""
+                , "http://www.color.org", "sRGB IEC61966-2.1", @is));
+            doc.AddNewPage();
+            PdfAcroForm form = PdfAcroForm.GetAcroForm(doc, true);
+            PdfFormField chk = PdfFormField.CreateCheckBox(doc, new Rectangle(100, 500, 50, 50), "name", "Off", PdfFormField
+                .TYPE_CHECK, PdfAConformanceLevel.PDF_A_1B);
+            chk.SetBorderColor(ColorConstants.BLACK);
+            chk.SetBorderWidth(1);
+            form.AddField(chk);
+            doc.Close();
+            NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(outPath, cmpPath, destinationFolder, diff
+                ));
+        }
+
+        /// <exception cref="System.IO.IOException"/>
+        /// <exception cref="System.Exception"/>
+        [NUnit.Framework.Test]
+        public virtual void PdfA1bCheckFieldOnAppearanceTest() {
+            String name = "pdfA1b_checkFieldOnAppearance";
+            String outPath = destinationFolder + name + ".pdf";
+            String cmpPath = cmpFolder + "cmp_" + name + ".pdf";
+            String diff = "diff_" + name + "_";
+            PdfWriter writer = new PdfWriter(outPath);
+            Stream @is = new FileStream(sourceFolder + "sRGB Color Space Profile.icm", FileMode.Open, FileAccess.Read);
+            PdfADocument doc = new PdfADocument(writer, PdfAConformanceLevel.PDF_A_1B, new PdfOutputIntent("Custom", ""
+                , "http://www.color.org", "sRGB IEC61966-2.1", @is));
+            doc.AddNewPage();
+            PdfAcroForm form = PdfAcroForm.GetAcroForm(doc, true);
+            PdfFormField chk = PdfFormField.CreateCheckBox(doc, new Rectangle(100, 500, 50, 50), "name", "On", PdfFormField
+                .TYPE_CHECK, PdfAConformanceLevel.PDF_A_1B);
+            chk.SetBorderColor(ColorConstants.BLACK);
+            chk.SetBorderWidth(1);
+            form.AddField(chk);
+            doc.Close();
+            NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(outPath, cmpPath, destinationFolder, diff
+                ));
+        }
+    }
+}