*** t spiking xml formatting/transformation

Co-authored-by: Jay Bazuzi <[email protected]>
Co-authored-by: Llewellyn Falco <[email protected]>

approvaltests-tests/src/test/java/org/approvaltests/XmlFormattingTest.java

@@ -0,0 +1,57 @@
+package org.approvaltests;
+
+import org.approvaltests.core.Options;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Source;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+import java.io.IOException;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.io.Writer;
+
+class XmlFormattingTest
+{
+  @Disabled("SPIKE - continue next time")
+  @Test
+  void xmlWithEmojiesAndAmpersands()
+  {
+    var expected = """
+        <?xml version='1.0' encoding='UTF-8'?>
+        <a>
+          <b>Tom &amp; Jerry</b>
+          <emoji>😸</emoji>
+        </a>
+        """;
+    String input = expected.replaceAll("\n", "").replace("  ", "");
+    Approvals.verify(prettyPrint(input, 2), new Options().inline(expected));
+  }
+  private static String prettyPrint(String expected, int tabSize)
+  {
+    try
+    {
+      Source xmlInput = new StreamSource(new StringReader(expected));
+      StringWriter stringWriter = new StringWriter();
+      StreamResult xmlOutput = new StreamResult(stringWriter);
+      TransformerFactory transformerFactory = TransformerFactory.newInstance();
+      transformerFactory.setAttribute("indent-number", tabSize);
+      Transformer transformer = transformerFactory.newTransformer();
+      transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+      transformer.transform(xmlInput, xmlOutput);
+      try (Writer writer = xmlOutput.getWriter())
+      {
+        return writer.toString();
+      }
+    }
+    catch (TransformerException | IOException e)
+    {
+      return expected;
+    }
+  }
+}