/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.scalar.cast;
import com.google.common.collect.ImmutableList;
import io.crate.metadata.FunctionIdent;
import io.crate.metadata.Functions;
import io.crate.operation.Input;
import io.crate.operation.scalar.ScalarFunctionModule;
import io.crate.planner.symbol.Function;
import io.crate.planner.symbol.Literal;
import io.crate.planner.symbol.Symbol;
import io.crate.testing.TestingHelpers;
import io.crate.types.DataType;
import io.crate.types.DataTypes;
import org.elasticsearch.common.inject.ModulesBuilder;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import java.util.Arrays;
import static org.hamcrest.Matchers.nullValue;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
public class ToDoubleFunctionTest {
private Functions functions;
private String functionName = ToDoubleFunction.NAME;
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Before
public void setUp() {
functions = new ModulesBuilder()
.add(new ScalarFunctionModule()).createInjector().getInstance(Functions.class);
}
private ToDoubleFunction getFunction(DataType type) {
return (ToDoubleFunction) functions.get(new FunctionIdent(functionName, Arrays.asList(type)));
}
private Double evaluate(Object value, DataType type) {
Input[] input = {(Input)Literal.newLiteral(type, value)};
return getFunction(type).evaluate(input);
}
private Symbol normalize(Object value, DataType type) {
ToDoubleFunction function = getFunction(type);
return function.normalizeSymbol(new Function(function.info(),
Arrays.<Symbol>asList(Literal.newLiteral(type, value))));
}
@Test
@SuppressWarnings("unchecked")
public void testNormalizeSymbol() throws Exception {
TestingHelpers.assertLiteralSymbol(normalize("123", DataTypes.STRING), 123d);
TestingHelpers.assertLiteralSymbol(normalize(12.5f, DataTypes.FLOAT), 12.5d);
}
@Test
public void testEvaluate() throws Exception {
assertThat(evaluate("123", DataTypes.STRING), is(123d));
assertThat(evaluate(null, DataTypes.STRING), nullValue());
assertThat(evaluate(123.5f, DataTypes.FLOAT), is(123.5d));
assertThat(evaluate(123.5d, DataTypes.DOUBLE), is(123.5d));
assertThat(evaluate(null, DataTypes.FLOAT), nullValue());
assertThat(evaluate(42L, DataTypes.LONG), is(42d));
assertThat(evaluate(42, DataTypes.INTEGER), is(42d));
assertThat(evaluate(null, DataTypes.INTEGER), nullValue());
}
@Test
public void testInvalidType() throws Exception {
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("type 'object' not supported for conversion");
functions.get(new FunctionIdent(functionName, ImmutableList.<DataType>of(DataTypes.OBJECT)));
}
@Test
public void testNormalizeInvalidString() throws Exception {
expectedException.expect(NumberFormatException.class);
expectedException.expectMessage("For input string: \"hello\"");
normalize("hello", DataTypes.STRING);
}
}