extend tests

Author: ilicmarkodb

kernel/kernel-api/src/main/java/io/delta/kernel/expressions/Literal.java

@@ -121,6 +121,17 @@ public static Literal ofString(String value) {
     return new Literal(value, StringType.STRING);
   }
 
+  /**
+   * Create a {@code string} type literal expression with collated {@link StringType}.
+   *
+   * @param value literal value
+   * @param collationIdentifier collation identifier for the string literal
+   * @return a {@link Literal} of type {@link StringType} with the given collation
+   */
+  public static Literal ofString(String value, CollationIdentifier collationIdentifier) {
+    return new Literal(value, new StringType(collationIdentifier));
+  }
+
   /**
    * Create a {@code binary} type literal expression.
    *