TestInvokeBytecodeExpression.java example

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presto-master
/*
 * Licensed 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 com.facebook.presto.bytecode.expression;

import com.google.common.collect.ImmutableList;
import org.testng.annotations.Test;

import static com.facebook.presto.bytecode.ParameterizedType.type;
import static com.facebook.presto.bytecode.expression.BytecodeExpressionAssertions.assertBytecodeExpression;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.constantDouble;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.constantString;
import static com.facebook.presto.bytecode.expression.BytecodeExpressions.invokeStatic;

public class TestInvokeBytecodeExpression
{
    @Test
    public void testInvokeMethod()
            throws Exception
    {
        assertBytecodeExpression(constantString("foo").invoke("length", int.class), "foo".length(), "\"foo\".length()");
        assertBytecodeExpression(constantString("foo").invoke("concat", String.class, constantString("bar")), "foo".concat("bar"), "\"foo\".concat(\"bar\")");
        assertBytecodeExpression(
                constantString("foo").invoke("concat", String.class, ImmutableList.of(String.class), constantString("bar")),
                "foo".concat("bar"),
                "\"foo\".concat(\"bar\")");
        assertBytecodeExpression(
                constantString("foo").invoke("concat", type(String.class), ImmutableList.of(type(String.class)), constantString("bar")),
                "foo".concat("bar"),
                "\"foo\".concat(\"bar\")");
    }

    @Test
    public void testInvokeStaticMethod()
            throws Exception
    {
        assertBytecodeExpression(invokeStatic(System.class, "lineSeparator", String.class), System.lineSeparator(), "System.lineSeparator()");
        assertBytecodeExpression(invokeStatic(Math.class, "cos", double.class, constantDouble(33.3)), Math.cos(33.3), "Math.cos(33.3)");
        assertBytecodeExpression(
                invokeStatic(Math.class, "cos", double.class, ImmutableList.of(double.class), constantDouble(33.3)),
                Math.cos(33.3),
                "Math.cos(33.3)");
        assertBytecodeExpression(
                invokeStatic(type(Math.class), "cos", type(double.class), ImmutableList.of(type(double.class)), ImmutableList.of(constantDouble(33.3))),
                Math.cos(33.3),
                "Math.cos(33.3)");
    }
}