More Base64 support / fixes #111

Author: jkschneider

src/main/java/org/openrewrite/java/migrate/UseJavaUtilBase64.java

@@ -70,6 +70,8 @@ public J visitJavaSourceFile(JavaSourceFile cu, ExecutionContext ctx) {
                 JavaSourceFile c = cu;
                 c = (J.CompilationUnit) new ChangeMethodName(sunPackage + ".BASE64Encoder encode(byte[])", "encodeToString",
                         false, true).getVisitor().visitNonNull(c, ctx);
+                c = (J.CompilationUnit) new ChangeMethodName(sunPackage + ".BASE64Encoder encodeBuffer(byte[])", "encodeToString",
+                        false, true).getVisitor().visitNonNull(c, ctx);
                 c = (J.CompilationUnit) new ChangeMethodName(sunPackage + ".BASE64Decoder decodeBuffer(String)", "decode",
                         false, true).getVisitor().visitNonNull(c, ctx);
                 return super.visitJavaSourceFile(c, ctx);

src/test/java/org/openrewrite/java/migrate/UseJavaUtilBase64Test.java

@@ -16,9 +16,7 @@
 package org.openrewrite.java.migrate;
 
 import org.junit.jupiter.api.Test;
-import org.openrewrite.java.ChangeMethodName;
 import org.openrewrite.java.JavaParser;
-import org.openrewrite.java.search.FindMethods;
 import org.openrewrite.test.RecipeSpec;
 import org.openrewrite.test.RewriteTest;
 
@@ -41,6 +39,7 @@ class Test {
                     void test(byte[] bBytes) {
                         BASE64Encoder encoder = new BASE64Encoder();
                         String encoded = encoder.encode(bBytes);
+                        encoded += encoder.encodeBuffer(bBytes);
                         byte[] decoded = new BASE64Decoder().decodeBuffer(encoded);
                     }
                 }
@@ -54,6 +53,7 @@ class Test {
                     void test(byte[] bBytes) {
                         Base64.Encoder encoder = Base64.getEncoder();
                         String encoded = encoder.encodeToString(bBytes);
+                        encoded += encoder.encodeToString(bBytes);
                         byte[] decoded = Base64.getDecoder().decode(encoded);
                     }
                 }