Add tests for grid layout for nesting and em - rem values

DEVSIX-8338

Author: nanouh

src/test/java/com/itextpdf/html2pdf/css/grid/GridAreaTest.java

@@ -71,6 +71,11 @@ public void templateAreasWithDotsTest() throws IOException, InterruptedException
         runTest("templateAreasWithDots");
     }
 
+    @Test
+    public void templateAreasSwitchedPlacesTest() throws IOException, InterruptedException {
+        runTest("grid-area-switched-places");
+    }
+
     @Test
     @LogMessages(messages = @LogMessage(messageTemplate = Html2PdfLogMessageConstant.GRID_TEMPLATE_AREAS_IS_INVALID))
     public void invalidTemplateAreasTest() throws IOException, InterruptedException {

src/test/java/com/itextpdf/html2pdf/css/grid/GridTemplateNestedTest.java

@@ -0,0 +1,149 @@
+/*
+    This file is part of the iText (R) project.
+    Copyright (c) 1998-2024 Apryse Group NV
+    Authors: Apryse Software.
+
+    This program is offered under a commercial and under the AGPL license.
+    For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+    AGPL licensing:
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.itextpdf.html2pdf.css.grid;
+
+import com.itextpdf.forms.logs.FormsLogMessageConstants;
+import com.itextpdf.html2pdf.ConverterProperties;
+import com.itextpdf.html2pdf.ExtendedHtmlConversionITextTest;
+import com.itextpdf.html2pdf.logs.Html2PdfLogMessageConstant;
+import com.itextpdf.io.logs.IoLogMessageConstant;
+import com.itextpdf.test.annotations.LogMessage;
+import com.itextpdf.test.annotations.LogMessages;
+
+import java.io.IOException;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+@Tag("IntegrationTest")
+public class GridTemplateNestedTest extends ExtendedHtmlConversionITextTest {
+    public static final String SOURCE_FOLDER = "./src/test/resources/com/itextpdf/html2pdf/css/grid"
+            + "/GridTemplateNestedTest/";
+    public static final String DESTINATION_FOLDER = "./target/test/com/itextpdf/html2pdf/css/grid"
+            + "/GridTemplateNestedTest/";
+
+    //TODO DEVSIX-3340 change cmp files when GRID LAYOUT is supported
+
+    @BeforeAll
+    public static void beforeClass() {
+        createOrClearDestinationFolder(DESTINATION_FOLDER);
+    }
+
+
+    @Test
+    public void templateNestedAreasTest() throws IOException, InterruptedException {
+        runTest("grid-nested-areas");
+    }
+
+    @Test
+    public void templateNestedArticlesTest() throws IOException, InterruptedException {
+        runTest("grid-nested-articles");
+    }
+
+    @Test
+    public void templateNestedFormsTest() throws IOException, InterruptedException {
+        runTest("grid-nested-forms");
+    }
+
+    @Test
+    public void templateNestedGridTest() throws IOException, InterruptedException {
+        runTest("grid-nested-grid");
+    }
+
+    @Test
+    public void templateNestedListsTest() throws IOException, InterruptedException {
+        runTest("grid-nested-lists");
+    }
+
+    @Test
+    public void templateNestedListsOddEvenTest() throws IOException, InterruptedException {
+        runTest("grid-nested-lists-odd-even");
+    }
+
+    @Test
+    public void templateNestedMixedContentTest() throws IOException, InterruptedException {
+        runTest("grid-nested-mixed-content");
+    }
+
+    @Test
+    public void templateNestedParagraphsTest() throws IOException, InterruptedException {
+        runTest("grid-nested-paragraphs");
+    }
+
+    @Test
+    public void templateNestedImagesTest() throws IOException, InterruptedException {
+        runTest("grid-nested-images");
+    }
+
+    @Test
+    public void templateNestedTableTest() throws IOException, InterruptedException {
+        runTest("grid-nested-table");
+    }
+
+    @LogMessages(messages = @LogMessage(
+            messageTemplate = IoLogMessageConstant.TABLE_WIDTH_IS_MORE_THAN_EXPECTED_DUE_TO_MIN_WIDTH, count = 2))
+    @Test
+    public void templateNestedTableNestedGridTest() throws IOException, InterruptedException {
+        runTest("grid-nested-table-nested-grid");
+    }
+
+    @Test
+    public void templateNestedTableMixedContentTest() throws IOException, InterruptedException {
+        runTest("grid-nested-table-with-mixed-content");
+    }
+
+    @Test
+    public void templateNested2LevelsWithAreasTest() throws IOException, InterruptedException {
+        runTest("grid-nested-2-levels-areas");
+    }
+
+    @LogMessages(messages = {
+            @LogMessage(messageTemplate = IoLogMessageConstant.CLIP_ELEMENT, count = 5)
+    })
+    @Test
+    public void templateNested3LevelsFormsTest() throws IOException, InterruptedException {
+        runTest("grid-nested-3-forms");
+    }
+
+    @Test
+    public void templateNested3LevelsTest() throws IOException, InterruptedException {
+        runTest("grid-nested-3-levels");
+    }
+
+    @Test
+    public void templateNested3LevelsMultipleTest() throws IOException, InterruptedException {
+        runTest("grid-nested-3-levels-multiple");
+    }
+
+    @Test
+    public void templateNested3LevelsTablesTest() throws IOException, InterruptedException {
+        runTest("grid-nested-3-levels-tables");
+    }
+
+
+    private void runTest(String testName) throws IOException, InterruptedException {
+        convertToPdfAndCompare(testName,
+                SOURCE_FOLDER, DESTINATION_FOLDER, false,
+                new ConverterProperties().setBaseUri(SOURCE_FOLDER).setCssGridEnabled(true));
+    }
+}

src/test/java/com/itextpdf/html2pdf/css/grid/GridTemplatesTest.java

@@ -330,6 +330,16 @@ public void gridWithTableTest() throws IOException, InterruptedException {
         runTest("gridWithTableTest");
     }
 
+    @Test
+    public void basicGridRemValuesTest() throws IOException, InterruptedException {
+        runTest("grid-layout-rem");
+    }
+
+    @Test
+    public void basicGridEmValuesTest() throws IOException, InterruptedException {
+        runTest("grid-layout-em");
+    }
+
     @Test
     public void gridLayoutDisablingTest() throws IOException, InterruptedException {
         convertToPdfAndCompare("basicColumnFewDivsTest",

src/test/resources/com/itextpdf/html2pdf/css/grid/GridAreaTest/cmp_grid-area-switched-places.pdf

@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <style>
+        .container {
+            display: grid;
+            grid-template-columns: 300px 300px;
+            grid-template-rows: auto;
+            row-gap: 10px;
+            column-gap: 10px;
+            padding: 15px;
+        }
+        .grid-elem {
+			color: white;
+			font-size: 20px;
+            background-color: darkblue;
+            padding: 20px;
+            border-radius: 0.5rem;
+        }
+		.third {
+			grid-area: 1;
+			background-color: #81b29a;
+		}
+		.fourth {
+			grid-area: 3 / 2;
+			background-color: #81b29a;
+		}
+		
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="grid-elem">
+            <p>1st elem</p>
+        </div>
+		<div class="grid-elem">
+            <p>2nd elem</p>
+        </div>
+		<div class="grid-elem third">
+			<p>3rd elem</p>
+		</div>
+		<div class="grid-elem fourth">
+            <p>4th elem</p>
+        </div>
+		<div class="grid-elem">
+            <p>5th elem</p>
+        </div>
+		<div class="grid-elem">
+			<p>6th elem</p>
+		</div>
+    </div>
+</body>
+</html>