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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.indexinglanguage.expressions;
import com.yahoo.document.DataType;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.document.datatypes.IntegerFieldValue;
import com.yahoo.document.datatypes.LongFieldValue;
import com.yahoo.document.datatypes.StringFieldValue;
import com.yahoo.vespa.indexinglanguage.SimpleTestAdapter;
import org.junit.Test;
import static com.yahoo.vespa.indexinglanguage.expressions.ArithmeticExpression.Operator;
import static org.junit.Assert.*;
/**
* @author Simon Thoresen Hult
*/
public class ArithmeticTestCase {
@Test
public void requireThatAccessorsWork() {
ArithmeticExpression exp = newArithmetic(6, Operator.ADD, 9);
assertEquals(newLong(6), exp.getLeftHandSide());
assertEquals(Operator.ADD, exp.getOperator());
assertEquals(newLong(9), exp.getRightHandSide());
}
@Test
public void requireThatHashCodeAndEqualsAreImplemented() {
Expression exp = newArithmetic(6, Operator.ADD, 9);
assertFalse(exp.equals(new Object()));
assertFalse(exp.equals(newArithmetic(1, Operator.DIV, 1)));
assertFalse(exp.equals(newArithmetic(6, Operator.DIV, 1)));
assertFalse(exp.equals(newArithmetic(6, Operator.ADD, 1)));
assertEquals(exp, newArithmetic(6, Operator.ADD, 9));
assertEquals(exp.hashCode(), newArithmetic(6, Operator.ADD, 9).hashCode());
}
@Test
public void requireThatConstructorDoesNotAcceptNull() {
try {
newArithmetic(null, Operator.ADD, new SimpleExpression());
fail();
} catch (NullPointerException e) {
}
try {
newArithmetic(new SimpleExpression(), null, new SimpleExpression());
fail();
} catch (NullPointerException e) {
}
try {
newArithmetic(new SimpleExpression(), Operator.ADD, null);
fail();
} catch (NullPointerException e) {
}
}
@Test
public void requireThatVerifyCallsAreForwarded() {
assertVerify(SimpleExpression.newOutput(DataType.INT), Operator.ADD,
SimpleExpression.newOutput(DataType.INT), null);
assertVerifyThrows(SimpleExpression.newOutput(null), Operator.ADD,
SimpleExpression.newOutput(DataType.INT), null,
"Attempting to perform arithmetic on a null value");
assertVerifyThrows(SimpleExpression.newOutput(DataType.INT), Operator.ADD,
SimpleExpression.newOutput(null), null,
"Attempting to perform arithmetic on a null value");
assertVerifyThrows(SimpleExpression.newOutput(null), Operator.ADD,
SimpleExpression.newOutput(null), null,
"Attempting to perform arithmetic on a null value");
assertVerifyThrows(SimpleExpression.newOutput(DataType.INT), Operator.ADD,
SimpleExpression.newOutput(DataType.STRING), null,
"Attempting to perform unsupported arithmetic: [int] + [string]");
assertVerifyThrows(SimpleExpression.newOutput(DataType.STRING), Operator.ADD,
SimpleExpression.newOutput(DataType.STRING), null,
"Attempting to perform unsupported arithmetic: [string] + [string]");
}
@Test
public void requireThatOperandInputCanBeNull() {
SimpleExpression reqNull = new SimpleExpression();
SimpleExpression reqInt = new SimpleExpression(DataType.INT);
assertNull(newArithmetic(reqNull, Operator.ADD, reqNull).requiredInputType());
assertEquals(DataType.INT, newArithmetic(reqInt, Operator.ADD, reqNull).requiredInputType());
assertEquals(DataType.INT, newArithmetic(reqInt, Operator.ADD, reqInt).requiredInputType());
assertEquals(DataType.INT, newArithmetic(reqNull, Operator.ADD, reqInt).requiredInputType());
}
@Test
public void requireThatOperandsAreInputCompatible() {
assertVerify(new SimpleExpression(DataType.INT), Operator.ADD,
new SimpleExpression(DataType.INT), DataType.INT);
assertVerifyThrows(new SimpleExpression(DataType.INT), Operator.ADD,
new SimpleExpression(DataType.STRING), null,
"Operands require conflicting input types, int vs string");
}
@Test
public void requireThatResultIsCalculated() {
for (int i = 0; i < 50; ++i) {
LongFieldValue lhs = new LongFieldValue(i);
LongFieldValue rhs = new LongFieldValue(100 - i);
assertResult(lhs, Operator.ADD, rhs, new LongFieldValue(lhs.getLong() + rhs.getLong()));
assertResult(lhs, Operator.SUB, rhs, new LongFieldValue(lhs.getLong() - rhs.getLong()));
assertResult(lhs, Operator.DIV, rhs, new LongFieldValue(lhs.getLong() / rhs.getLong()));
assertResult(lhs, Operator.MOD, rhs, new LongFieldValue(lhs.getLong() % rhs.getLong()));
assertResult(lhs, Operator.MUL, rhs, new LongFieldValue(lhs.getLong() * rhs.getLong()));
}
}
@Test
public void requireThatArithmeticWithNullEvaluatesToNull() {
assertNull(newArithmetic(new SimpleExpression(), Operator.ADD,
new ConstantExpression(new LongFieldValue(69))).execute());
assertNull(newArithmetic(new ConstantExpression(new LongFieldValue(69)), Operator.ADD,
new SimpleExpression()).execute());
}
@Test
public void requireThatNonNumericOperandThrows() {
try {
newArithmetic(new ConstantExpression(new IntegerFieldValue(6)), Operator.ADD,
new ConstantExpression(new StringFieldValue("9"))).execute();
fail();
} catch (IllegalArgumentException e) {
assertEquals("Unsupported operation: [int] + [string]", e.getMessage());
}
try {
newArithmetic(new ConstantExpression(new StringFieldValue("6")), Operator.ADD,
new ConstantExpression(new IntegerFieldValue(9))).execute();
fail();
} catch (IllegalArgumentException e) {
assertEquals("Unsupported operation: [string] + [int]", e.getMessage());
}
}
@Test
public void requireThatProperNumericalTypeIsUsed() {
for (Operator op : Operator.values()) {
assertType(DataType.INT, op, DataType.INT, DataType.INT);
assertType(DataType.LONG, op, DataType.INT, DataType.LONG);
assertType(DataType.LONG, op, DataType.LONG, DataType.LONG);
assertType(DataType.INT, op, DataType.LONG, DataType.LONG);
assertType(DataType.FLOAT, op, DataType.FLOAT, DataType.FLOAT);
assertType(DataType.DOUBLE, op, DataType.FLOAT, DataType.DOUBLE);
assertType(DataType.DOUBLE, op, DataType.DOUBLE, DataType.DOUBLE);
assertType(DataType.FLOAT, op, DataType.DOUBLE, DataType.DOUBLE);
assertType(DataType.INT, op, DataType.FLOAT, DataType.FLOAT);
assertType(DataType.INT, op, DataType.DOUBLE, DataType.DOUBLE);
}
}
private void assertResult(FieldValue lhs, Operator op, FieldValue rhs, FieldValue expected) {
assertEquals(expected, evaluate(new ConstantExpression(lhs), op,
new ConstantExpression(rhs)));
}
private void assertType(DataType lhs, Operator op, DataType rhs, DataType expected) {
assertEquals(expected, newArithmetic(SimpleExpression.newOutput(lhs), op,
SimpleExpression.newOutput(rhs)).verify());
assertEquals(expected, newArithmetic(lhs.createFieldValue(6), op,
rhs.createFieldValue(9)).execute().getDataType());
}
private static FieldValue evaluate(Expression lhs, Operator op, Expression rhs) {
ExecutionContext ctx = new ExecutionContext(new SimpleTestAdapter());
new ArithmeticExpression(lhs, op, rhs).execute(ctx);
return ctx.getValue();
}
private static ArithmeticExpression newArithmetic(long lhs, Operator op, long rhs) {
return newArithmetic(new LongFieldValue(lhs), op, new LongFieldValue(rhs));
}
private static ArithmeticExpression newArithmetic(FieldValue lhs, Operator op, FieldValue rhs) {
return newArithmetic(new ConstantExpression(lhs), op, new ConstantExpression(rhs));
}
private static ArithmeticExpression newArithmetic(Expression lhs, Operator op, Expression rhs) {
return new ArithmeticExpression(lhs, op, rhs);
}
private static ConstantExpression newLong(long val) {
return new ConstantExpression(new LongFieldValue(val));
}
private static void assertVerify(Expression lhs, Operator op, Expression rhs, DataType val) {
new ArithmeticExpression(lhs, op, rhs).verify(val);
}
private static void assertVerifyThrows(Expression lhs, Operator op, Expression rhs, DataType val,
String expectedException) {
try {
new ArithmeticExpression(lhs, op, rhs).verify(val);
fail();
} catch (VerificationException e) {
assertEquals(expectedException, e.getMessage());
}
}
}
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