/*
* Copyright 2016 Nabarun Mondal
* 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.noga.njexl.lang;
/**
* Test cases for the if statement.
*
* @since 1.1
*/
public class IfTest extends JexlTestCase {
public IfTest(String testName) {
super(testName);
}
/**
* Make sure if true executes the true statement
*
* @throws Exception on any error
*/
public void testSimpleIfTrue() throws Exception {
Expression e = JEXL.createExpression("if (true) 1");
JexlContext jc = new MapContext();
Object o = e.evaluate(jc);
assertEquals("Result is not 1", new Integer(1), o);
}
/**
* Make sure if false doesn't execute the true statement
*
* @throws Exception on any error
*/
public void testSimpleIfFalse() throws Exception {
Expression e = JEXL.createExpression("if (false) 1");
JexlContext jc = new MapContext();
Object o = e.evaluate(jc);
assertNull("Return value is not empty", o);
}
/**
* Make sure if false executes the false statement
*
* @throws Exception on any error
*/
public void testSimpleElse() throws Exception {
Expression e = JEXL.createExpression("if (false) 1 else 2;");
JexlContext jc = new MapContext();
Object o = e.evaluate(jc);
assertEquals("Result is not 2", new Integer(2), o);
}
/**
* Test the if statement handles blocks correctly
*
* @throws Exception on any error
*/
public void testBlockIfTrue() throws Exception {
Expression e = JEXL.createExpression("if (true) { 'hello'; }");
JexlContext jc = new MapContext();
Object o = e.evaluate(jc);
assertEquals("Result is wrong", "hello", o);
}
/**
* Test the if statement handles blocks in the else statement correctly
*
* @throws Exception on any error
*/
public void testBlockElse() throws Exception {
Expression e = JEXL.createExpression("if (false) {1} else {2 ; 3}");
JexlContext jc = new MapContext();
Object o = e.evaluate(jc);
assertEquals("Result is wrong", new Integer(3), o);
}
/**
* Test the if statement evaluates expressions correctly
*
* @throws Exception on any error
*/
public void testIfWithSimpleExpression() throws Exception {
Expression e = JEXL.createExpression("if (x == 1) true;");
JexlContext jc = new MapContext();
jc.set("x", new Integer(1));
Object o = e.evaluate(jc);
assertEquals("Result is not true", Boolean.TRUE, o);
}
/**
* Test the if statement evaluates arithmetic expressions correctly
*
* @throws Exception on any error
*/
public void testIfWithArithmeticExpression() throws Exception {
Expression e = JEXL.createExpression("if ((x * 2) + 1 == 5) true;");
JexlContext jc = new MapContext();
jc.set("x", new Integer(2));
Object o = e.evaluate(jc);
assertEquals("Result is not true", Boolean.TRUE, o);
}
/**
* Test the if statement evaluates decimal arithmetic expressions correctly
*
* @throws Exception on any error
*/
public void testIfWithDecimalArithmeticExpression() throws Exception {
Expression e = JEXL.createExpression("if ((x * 2) == 5) true");
JexlContext jc = new MapContext();
jc.set("x", new Float(2.5f));
Object o = e.evaluate(jc);
assertEquals("Result is not true", Boolean.TRUE, o);
}
/**
* Test the if statement works with assignment
*
* @throws Exception on any error
*/
public void testIfWithAssignment() throws Exception {
Expression e = JEXL.createExpression("if ((x * 2) == 5) {y = 1} else {y = 2;}");
JexlContext jc = new MapContext();
jc.set("x", new Float(2.5f));
e.evaluate(jc);
Object result = jc.get("y");
assertEquals("y has the wrong value", new Integer(1), result);
}
/**
* Ternary operator condition undefined or null evaluates to false
* independantly of engine flags.
* @throws Exception
*/
public void testTernary() throws Exception {
JexlEngine jexl = createThreadedArithmeticEngine(true);
jexl.setCache(64);
JexlContext jc = new MapContext();
Expression e = jexl.createExpression("x.y.z = foo ?'bar':'quux'");
Object o;
// undefined foo
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", null);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", Boolean.FALSE);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", Boolean.TRUE);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be bar", "bar", o);
o = jc.get("x.y.z");
assertEquals("Should be bar", "bar", o);
}
debuggerCheck(jexl);
}
/**
* Ternary operator condition undefined or null evaluates to false
* independantly of engine flags.
* @throws Exception
*/
public void testTernaryShorthand() throws Exception {
JexlEngine jexl = createThreadedArithmeticEngine(true);
jexl.setCache(64);
JexlContext jc = new MapContext();
Expression e = JEXL.createExpression("x.y.z = foo?:'quux'");
Object o;
// undefined foo
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", null);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", Boolean.FALSE);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", Double.NaN);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", "");
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", "false");
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", 0d);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
jc.set("foo", 0);
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be quux", "quux", o);
o = jc.get("x.y.z");
assertEquals("Should be quux", "quux", o);
}
// This is our impl - only True can be matched in
jc.set("foo", "TruE");
for (int l = 0; l < 4; ++l) {
jexl.setLenient((l & 1) != 0);
jexl.setSilent((l & 2) != 0);
o = e.evaluate(jc);
assertEquals("Should be TruE", "TruE" , o);
o = jc.get("x.y.z");
assertEquals("Should be TruE", "TruE" , o);
}
debuggerCheck(jexl);
}
}