feat: Add Flow component for code Html element #20832 (#21580)

* Extended Tag, add Code.java, relevant tests

* Removed implements clicknotifier + javadoc

* alphabetical order in tag, better javadoc

(cherry picked from commit 547bc83)

Author: kangcaleb

flow-html-components/src/main/java/com/vaadin/flow/component/html/Code.java

@@ -0,0 +1,43 @@
+package com.vaadin.flow.component.html;
+
+import com.vaadin.flow.component.Component;
+import com.vaadin.flow.component.HtmlContainer;
+import com.vaadin.flow.component.Tag;
+
+/**
+ * Component representing a <code>&lt;code&gt;</code> element.
+ *
+ * @author Vaadin Ltd
+ * @since 25.0
+ */
+@Tag(Tag.CODE)
+public class Code extends HtmlContainer {
+
+    /**
+     * Creates a new empty code component.
+     */
+    public Code() {
+        super();
+    }
+
+    /**
+     * Creates a new code component with the given child components.
+     *
+     * @param components
+     *            the child components
+     */
+    public Code(Component... components) {
+        super(components);
+    }
+
+    /**
+     * Creates a new code component with the given text.
+     *
+     * @param text
+     *            the text
+     */
+    public Code(String text) {
+        super();
+        setText(text);
+    }
+}

flow-html-components/src/test/java/com/vaadin/flow/component/html/CodeTest.java

@@ -0,0 +1,21 @@
+package com.vaadin.flow.component.html;
+
+import org.junit.Test;
+
+public class CodeTest extends ComponentTest {
+    // Actual test methods in super class
+
+    @Override
+    protected void addProperties() {
+        // Component defines no new properties
+    }
+
+    @Test
+    @Override
+    public void testHasAriaLabelIsNotImplemented() {
+        // Don't use aria-label or aria-labelledby on any other non-interactive
+        // content such as p, legend, li, or ul, because it is ignored.
+        // Source: https://www.w3.org/TR/using-aria/#label-support
+        super.testHasAriaLabelIsNotImplemented();
+    }
+}

flow-server/src/main/java/com/vaadin/flow/component/Tag.java

@@ -58,6 +58,10 @@
      * Tag for an <code>&lt;caption&gt;</code>.
      */
     String CAPTION = "caption";
+    /**
+     * Tag for a <code>&lt;code&gt;</code>.
+     */
+    String CODE = "code";
     /**
      * Tag for an <code>&lt;dd&gt;</code>.
      */