package org.jtwig.parser.parboiled.expression;
import org.jtwig.model.expression.ConstantExpression;
import org.jtwig.model.expression.Expression;
import org.jtwig.parser.parboiled.AbstractParserTest;
import org.junit.Test;
import org.parboiled.support.ParsingResult;
import static junit.framework.TestCase.assertEquals;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.hamcrest.core.IsInstanceOf.instanceOf;
public class ConstantExpressionParserTest extends AbstractParserTest {
private ConstantExpressionParser underTest = context.parser(ConstantExpressionParser.class);
@Test
public void numberExpression() throws Exception {
ParsingResult<Expression> result = parse(underTest.ExpressionRule(), "123");
assertThat(result.matched, is(true));
Expression expression = result.valueStack.pop();
assertThat(expression, is(instanceOf(ConstantExpression.class)));
ConstantExpression variableExpression = (ConstantExpression) expression;
assertThat(variableExpression.getConstantValue().toString(), equalTo("123"));
assertThat(variableExpression.getPosition().getLine(), is(1));
assertThat(variableExpression.getPosition().getColumn(), is(1));
}
@Test
public void stringExpression() throws Exception {
ParsingResult<Expression> result = parse(underTest.ExpressionRule(), "'test'");
assertThat(result.matched, is(true));
Expression expression = result.valueStack.pop();
assertThat(expression, is(instanceOf(ConstantExpression.class)));
ConstantExpression variableExpression = (ConstantExpression) expression;
assertThat(variableExpression.getConstantValue().toString(), equalTo("test"));
assertThat(variableExpression.getPosition().getLine(), is(1));
assertThat(variableExpression.getPosition().getColumn(), is(1));
}
@Test
public void trueExpression() throws Exception {
ParsingResult<Expression> result = parse(underTest.ExpressionRule(), "true");
assertThat(result.matched, is(true));
Expression expression = result.valueStack.pop();
assertThat(expression, is(instanceOf(ConstantExpression.class)));
ConstantExpression variableExpression = (ConstantExpression) expression;
assertEquals(variableExpression.getConstantValue(), true);
assertThat(variableExpression.getPosition().getLine(), is(1));
assertThat(variableExpression.getPosition().getColumn(), is(1));
}
@Test
public void falseExpression() throws Exception {
ParsingResult<Expression> result = parse(underTest.ExpressionRule(), "false");
assertThat(result.matched, is(true));
Expression expression = result.valueStack.pop();
assertThat(expression, is(instanceOf(ConstantExpression.class)));
ConstantExpression variableExpression = (ConstantExpression) expression;
assertEquals(variableExpression.getConstantValue(), false);
assertThat(variableExpression.getPosition().getLine(), is(1));
assertThat(variableExpression.getPosition().getColumn(), is(1));
}
}