fix: Address CodeRabbitAI suggestions for tooltip feature

Refactors the tooltip implementation in GridExporter.java to reduce
code duplication by introducing a helper method. Corrects the PDF
template parameter in createFor and removes an obsolete comment.
Updates README.md styling for tooltip documentation. Adds necessary
JUnit 5 and Mockito dependencies to pom.xml for test compilation.
Verifies that existing unit tests for tooltip internal state pass.

Addresses feedback from PR #177.
Related to #114.

Author: google-labs-jules[bot]

README.md

@@ -134,9 +134,9 @@ You can set a default tooltip that applies to all export icons, or provide speci
 
 ### Behavior and Precedence
 
-*   If a specific tooltip is set for an icon (e.g., `setExcelExportIconTooltip("Specific")`), it is always used for that icon.
-*   If a specific tooltip is *not* set for an icon, or if it's set to `null`, but a default tooltip is set (e.g., `setDefaultExportIconTooltip("Default")`), the default tooltip is used.
-*   If neither a specific nor a default tooltip is set (or both are `null`) for an icon, it will have no tooltip (the `title` attribute will be removed from the anchor).
+*   A specific tooltip, when set for an icon (e.g., `setExcelExportIconTooltip("Specific")`), always takes precedence for that icon.
+*   When an icon's specific tooltip is not set or is `null`, the default tooltip (set by `setDefaultExportIconTooltip("Default")`) will be applied.
+*   Should neither a specific nor a default tooltip be configured for an icon (or if both are `null`), the icon will not display a tooltip (its `title` attribute will be removed).
 
 ### Removing or Clearing Tooltips
 

pom.xml

@@ -196,6 +196,24 @@
 			<artifactId>slf4j-simple</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-api</artifactId>
+			<version>5.10.2</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<version>5.10.2</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<version>5.11.0</version>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>com.vaadin</groupId>
 			<artifactId>vaadin-testbench</artifactId>

src/main/java/com/flowingcode/vaadin/addons/gridexporter/GridExporter.java

@@ -166,17 +166,11 @@ public static <T> GridExporter<T> createFor(
                       .setHref(exporter.getExcelStreamResource(excelCustomTemplate)
                           .forComponent(excelLink));
                   excelLink.getElement().setAttribute("download", true);
-                  String finalExcelTooltip = null;
-                  if (exporter.excelIconTooltip != null) {
-                    finalExcelTooltip = exporter.excelIconTooltip;
-                  } else if (exporter.defaultExportIconTooltip != null) {
-                    finalExcelTooltip = exporter.defaultExportIconTooltip;
-                  }
-                  if (finalExcelTooltip != null && !finalExcelTooltip.isEmpty()) {
-                    excelLink.setTitle(finalExcelTooltip);
-                  } else {
-                    excelLink.setTitle(null);
-                  }
+                  excelLink
+                      .setHref(exporter.getExcelStreamResource(excelCustomTemplate)
+                          .forComponent(excelLink));
+                  excelLink.getElement().setAttribute("download", true);
+                  exporter.applyTooltip(excelLink, exporter.excelIconTooltip);
                   footerToolbar.add(
                       new FooterToolbarItem(excelLink, FooterToolbarItemPosition.EXPORT_BUTTON));
                 }
@@ -185,54 +179,24 @@ public static <T> GridExporter<T> createFor(
                   docLink.setHref(
                       exporter.getDocxStreamResource(docxCustomTemplate).forComponent(docLink));
                   docLink.getElement().setAttribute("download", true);
-                  String finalDocxTooltip = null;
-                  if (exporter.docxIconTooltip != null) {
-                    finalDocxTooltip = exporter.docxIconTooltip;
-                  } else if (exporter.defaultExportIconTooltip != null) {
-                    finalDocxTooltip = exporter.defaultExportIconTooltip;
-                  }
-                  if (finalDocxTooltip != null && !finalDocxTooltip.isEmpty()) {
-                    docLink.setTitle(finalDocxTooltip);
-                  } else {
-                    docLink.setTitle(null);
-                  }
+                  exporter.applyTooltip(docLink, exporter.docxIconTooltip);
                   footerToolbar
                       .add(new FooterToolbarItem(docLink, FooterToolbarItemPosition.EXPORT_BUTTON));
                 }
                 if (exporter.isPdfExportEnabled()) {
-                  Anchor pdfLink = new Anchor("", FontAwesome.Regular.FILE_PDF.create()); // Renamed to pdfLink
+                  Anchor pdfLink = new Anchor("", FontAwesome.Regular.FILE_PDF.create());
                   pdfLink.setHref(
-                      exporter.getPdfStreamResource(docxCustomTemplate).forComponent(pdfLink));
+                      exporter.getPdfStreamResource(null).forComponent(pdfLink));
                   pdfLink.getElement().setAttribute("download", true);
-                  String finalPdfTooltip = null;
-                  if (exporter.pdfIconTooltip != null) {
-                    finalPdfTooltip = exporter.pdfIconTooltip;
-                  } else if (exporter.defaultExportIconTooltip != null) {
-                    finalPdfTooltip = exporter.defaultExportIconTooltip;
-                  }
-                  if (finalPdfTooltip != null && !finalPdfTooltip.isEmpty()) {
-                    pdfLink.setTitle(finalPdfTooltip);
-                  } else {
-                    pdfLink.setTitle(null);
-                  }
+                  exporter.applyTooltip(pdfLink, exporter.pdfIconTooltip);
                   footerToolbar
                       .add(new FooterToolbarItem(pdfLink, FooterToolbarItemPosition.EXPORT_BUTTON));
                 }
                 if (exporter.isCsvExportEnabled()) {
                   Anchor csvLink = new Anchor("", FontAwesome.Regular.FILE_LINES.create());
                   csvLink.setHref(exporter.getCsvStreamResource());
                   csvLink.getElement().setAttribute("download", true);
-                  String finalCsvTooltip = null;
-                  if (exporter.csvIconTooltip != null) {
-                    finalCsvTooltip = exporter.csvIconTooltip;
-                  } else if (exporter.defaultExportIconTooltip != null) {
-                    finalCsvTooltip = exporter.defaultExportIconTooltip;
-                  }
-                  if (finalCsvTooltip != null && !finalCsvTooltip.isEmpty()) {
-                    csvLink.setTitle(finalCsvTooltip);
-                  } else {
-                    csvLink.setTitle(null);
-                  }
+                  exporter.applyTooltip(csvLink, exporter.csvIconTooltip);
                   footerToolbar
                       .add(new FooterToolbarItem(csvLink, FooterToolbarItemPosition.EXPORT_BUTTON));
                 }
@@ -862,6 +826,14 @@ public void setCsvCharset(SerializableSupplier<Charset> charset) {
     csvCharset = charset;
   }
 
+  private void applyTooltip(Anchor link, String specificTooltipText) {
+    String finalTooltip = specificTooltipText;
+    if (finalTooltip == null) {
+        finalTooltip = this.defaultExportIconTooltip;
+    }
+    link.setTitle(finalTooltip);
+  }
+
   /**
    * Sets the default tooltip text for all export icons.
    * This tooltip will be used for any export icon that does not have a specific tooltip set