TestStandardPreparedQuery.java

/*
 * 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
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package org.apache.nifi.attribute.expression.language;

import static org.junit.Assert.assertEquals;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import org.junit.Ignore;
import org.junit.Test;

public class TestStandardPreparedQuery {

    @Test
    public void testSimpleReference() {
        final Map<String, String> attrs = new HashMap<>();
        attrs.put("xx", "world");

        assertEquals("world", evaluate("${xx}", attrs));
        assertEquals("hello, world!", evaluate("hello, ${xx}!", attrs));
    }

    @Test
    public void testEmbeddedReference() {
        final Map<String, String> attrs = new HashMap<>();
        attrs.put("xx", "yy");
        attrs.put("yy", "world");

        assertEquals("world", evaluate("${${xx}}", attrs));
    }

    @Test
    public void test10MIterations() {
        final Map<String, String> attrs = new HashMap<>();
        attrs.put("xx", "world");

        final StandardPreparedQuery prepared = (StandardPreparedQuery) Query.prepare("${xx}");
        final long start = System.nanoTime();
        for (int i = 0; i < 10000000; i++) {
            assertEquals("world", prepared.evaluateExpressions(attrs, null));
        }
        final long nanos = System.nanoTime() - start;
        System.out.println(TimeUnit.NANOSECONDS.toMillis(nanos));
    }

    @Test
    @Ignore("Takes too long")
    public void test10MIterationsWithQuery() {
        final Map<String, String> attrs = new HashMap<>();
        attrs.put("xx", "world");

        final long start = System.nanoTime();
        for (int i = 0; i < 10000000; i++) {
            assertEquals("world", Query.evaluateExpressions("${xx}", attrs));
        }
        final long nanos = System.nanoTime() - start;
        System.out.println(TimeUnit.NANOSECONDS.toMillis(nanos));

    }

    @Test
    public void testSeveralSequentialExpressions() {
        final Map<String, String> attributes = new HashMap<>();
        attributes.put("audience", "World");
        attributes.put("comma", ",");
        attributes.put("question", " how are you?");
        assertEquals("Hello, World, how are you?!", evaluate("Hello, ${audience}${comma}${question}!", attributes));

    }

    private String evaluate(final String query, final Map<String, String> attrs) {
        final String evaluated = ((StandardPreparedQuery) Query.prepare(query)).evaluateExpressions(attrs, null);
        return evaluated;
    }

}