Changed added

Author: inv-jishnu

data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataexport/ConsoleExportProgressReporter.java

@@ -62,14 +62,14 @@ public static void reportError(String message, Throwable throwable) {
     }
   }
 
-    /**
-     * Prints a formatted waring message to the console.
-     *
-     * @param message the error description
-     */
-    public static void reportWarning(String message) {
-        System.err.println("%n!! Warning: " + message);
-    }
+  /**
+   * Prints a formatted waring message to the console.
+   *
+   * @param message the error description
+   */
+  public static void reportWarning(String message) {
+    System.err.printf("%n⚠️  Warning: %s%n", message);
+  }
 
   /**
    * Formats elapsed time in "Xm Ys" format.

data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataexport/ExportCommand.java

@@ -157,8 +157,8 @@ private void warnAboutIgnoredDeprecatedOptions() {
                   + "Use the 'scalar.db.consensus_commit.include_metadata.enabled' configuration property "
                   + "in your ScalarDB properties file to control whether transaction metadata is included in scan operations.|@");
 
-//      logger.warn(warning);
-        ConsoleExportProgressReporter.reportWarning(warning);
+      //      logger.warn(warning);
+      ConsoleExportProgressReporter.reportWarning(warning);
     }
   }
 

data-loader/cli/src/test/java/com/scalar/db/dataloader/cli/command/dataexport/ConsoleExportProgressReporterTest.java

@@ -105,4 +105,52 @@ void testReportError_shouldPrintMessageWithoutExceptionWhenNull()
       System.setErr(originalErr);
     }
   }
+
+  @Test
+  void testReportWarning_shouldPrintFormattedWarningMessage() throws UnsupportedEncodingException {
+
+    ByteArrayOutputStream errContent = new ByteArrayOutputStream();
+    PrintStream originalErr = System.err;
+    System.setErr(new PrintStream(errContent, true, "UTF-8"));
+
+    try {
+      String warningMessage = "Deprecated option detected";
+
+      ConsoleExportProgressReporter.reportWarning(warningMessage);
+
+      String output = errContent.toString("UTF-8");
+
+      // Expected core formatted message
+      assertTrue(
+          output.contains("⚠️  Warning: " + warningMessage), "Expected formatted warning message");
+
+      // Should start with a newline produced by %n
+      assertTrue(
+          output.startsWith(System.lineSeparator()), "Expected output to start with a newline");
+
+      // Should end with a newline from the trailing %n
+      assertTrue(output.endsWith(System.lineSeparator()), "Expected output to end with a newline");
+    } finally {
+      System.setErr(originalErr);
+    }
+  }
+
+  @Test
+  void testReportWarning_shouldNotIncludeErrorSpecificFields() throws UnsupportedEncodingException {
+
+    ByteArrayOutputStream errContent = new ByteArrayOutputStream();
+    PrintStream originalErr = System.err;
+    System.setErr(new PrintStream(errContent, true, "UTF-8"));
+
+    try {
+      ConsoleExportProgressReporter.reportWarning("Check your input");
+
+      String output = errContent.toString("UTF-8");
+
+      assertFalse(output.contains("Cause:"), "Warning output must not include cause");
+      assertFalse(output.contains("❌"), "Warning output must not include error symbol");
+    } finally {
+      System.setErr(originalErr);
+    }
+  }
 }