[ZEPPELIN-5884] fix: wrong path of test folder in Java Interpreter

java/src/test/java/org/apache/zeppelin/java/JavaInterpreterUtilsTest.java

@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.zeppelin.java;
+
+import org.apache.zeppelin.interpreter.InterpreterContext;
+import org.apache.zeppelin.interpreter.InterpreterResult;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+
+import static org.junit.Assert.assertEquals;
+
+public class JavaInterpreterUtilsTest {
+
+  private static final String TABLE_RESULT_1 = "%table\n" +
+                                               "Word\tCount\n" +
+                                               "world\t5\n" +
+                                               "hello\t4";
+
+  private static JavaInterpreter java;
+  private static InterpreterContext context;
+
+  @BeforeClass
+  public static void setUp() {
+    Properties p = new Properties();
+    java = new JavaInterpreter(p);
+    java.open();
+    context = InterpreterContext.builder().build();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    java.close();
+  }
+
+  @Test
+  public void testDisplayTableFromSimpleMapUtil() {
+
+    Map<String, Long> counts = new HashMap<>();
+    counts.put("hello", 4L);
+    counts.put("world", 5L);
+
+    assertEquals(
+            TABLE_RESULT_1,
+            JavaInterpreterUtils.displayTableFromSimpleMap("Word", "Count", counts)
+    );
+
+  }
+
+  @Test
+  public void testStaticReplWithDisplayTableFromSimpleMapUtilReturnTableType() {
+
+    StringWriter writer = new StringWriter();
+    PrintWriter out = new PrintWriter(writer);
+    out.println("import java.util.HashMap;");
+    out.println("import java.util.Map;");
+    out.println("import org.apache.zeppelin.java.JavaInterpreterUtils;");
+    out.println("public class HelloWorld {");
+    out.println("  public static void main(String args[]) {");
+    out.println("    Map<String, Long> counts = new HashMap<>();");
+    out.println("    counts.put(\"hello\",4L);");
+    out.println("    counts.put(\"world\",5L);");
+    out.println("    System.out.println("
+                + "JavaInterpreterUtils.displayTableFromSimpleMap(\"Word\", \"Count\", counts)"
+                + ");");
+    out.println("  }");
+    out.println("}");
+    out.close();
+
+    InterpreterResult res = java.interpret(writer.toString(), context);
+
+    assertEquals(InterpreterResult.Code.SUCCESS, res.code());
+    assertEquals(InterpreterResult.Type.TABLE, res.message().get(0).getType());
+  }
+
+}