/*
* 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.FunctionImplementation;
import io.crate.metadata.Functions;
import io.crate.metadata.Scalar;
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.types.DataType;
import io.crate.types.DataTypes;
import org.apache.lucene.util.BytesRef;
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 io.crate.testing.TestingHelpers.assertLiteralSymbol;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
public class ToStringFunctionTest {
private Functions functions;
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Before
public void setUp() {
functions = new ModulesBuilder()
.add(new ScalarFunctionModule()).createInjector().getInstance(Functions.class);
}
@Test
@SuppressWarnings("unchecked")
public void testNormalizeSymbol() throws Exception {
FunctionImplementation castIntegerToString = functions.get(new FunctionIdent(ToStringFunction.NAME, ImmutableList.<DataType>of(DataTypes.INTEGER)));
Function function = new Function(castIntegerToString.info(), Arrays.<Symbol>asList(Literal.newLiteral(123)));
Symbol result = castIntegerToString.normalizeSymbol(function);
assertLiteralSymbol(result, "123");
FunctionImplementation castFloatToString = functions.get(new FunctionIdent(ToStringFunction.NAME, ImmutableList.<DataType>of(DataTypes.FLOAT)));
function = new Function(castFloatToString.info(), Arrays.<Symbol>asList(Literal.newLiteral(0.5f)));
result = castFloatToString.normalizeSymbol(function);
assertLiteralSymbol(result, "0.5");
FunctionImplementation castStringToString = functions.get(new FunctionIdent(ToStringFunction.NAME, ImmutableList.<DataType>of(DataTypes.STRING)));
function = new Function(castStringToString.info(), Arrays.<Symbol>asList(Literal.newLiteral("hello")));
result = castStringToString.normalizeSymbol(function);
assertLiteralSymbol(result, "hello");
}
@Test
public void testInvalidType() throws Exception {
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("type 'object' not supported for conversion");
functions.get(new FunctionIdent(ToStringFunction.NAME, ImmutableList.<DataType>of(DataTypes.OBJECT)));
}
@Test
@SuppressWarnings("unchecked")
public void testEvaluate() throws Exception {
FunctionIdent ident = new FunctionIdent(ToStringFunction.NAME, ImmutableList.<DataType>of(DataTypes.INTEGER));
Scalar<Object, Object> format = (Scalar<Object, Object>) functions.get(ident);
Input<Object> arg1 = new Input<Object>() {
@Override
public Object value() {
return 123;
}
};
Object result = format.evaluate(arg1);
assertThat(((BytesRef)result), is(new BytesRef("123")));
}
}