package org.jtwig.render.expression.calculator;
import com.google.common.base.Optional;
import org.jtwig.exceptions.CalculationException;
import org.jtwig.model.expression.ComprehensionListExpression;
import org.jtwig.model.expression.Expression;
import org.jtwig.render.RenderRequest;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import java.util.Collections;
import java.util.List;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertSame;
import static org.mockito.Mockito.*;
public class ComprehensionListExpressionCalculatorTest {
private ComprehensionListExpressionCalculator underTest = new ComprehensionListExpressionCalculator();
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Test
public void calculateWhenNoStrategy() throws Exception {
Object startValue = "blah";
Object endValue = "bluh";
Expression end = mock(Expression.class);
Expression start = mock(Expression.class);
RenderRequest request = mock(RenderRequest.class, RETURNS_DEEP_STUBS);
ComprehensionListExpression comprehensionListExpression = mock(ComprehensionListExpression.class);
when(comprehensionListExpression.getStart()).thenReturn(start);
when(comprehensionListExpression.getEnd()).thenReturn(end);
when(request.getEnvironment().getRenderEnvironment().getCalculateExpressionService().calculate(request, start)).thenReturn(startValue);
when(request.getEnvironment().getRenderEnvironment().getCalculateExpressionService().calculate(request, end)).thenReturn(endValue);
when(request.getEnvironment().getListEnumerationStrategy().enumerate(request, startValue, endValue)).thenReturn(Optional.<List<Object>>absent());
expectedException.expect(CalculationException.class);
expectedException.expectMessage(containsString("Unable to calculate a list from a comprehension list starting with 'blah' and ending with 'bluh'"));
underTest.calculate(request, comprehensionListExpression);
}
@Test
public void calculateWhenSomeStrategy() throws Exception {
Object startValue = "blah";
Object endValue = "bluh";
Expression end = mock(Expression.class);
Expression start = mock(Expression.class);
RenderRequest request = mock(RenderRequest.class, RETURNS_DEEP_STUBS);
ComprehensionListExpression comprehensionListExpression = mock(ComprehensionListExpression.class);
List<Object> expected = Collections.singletonList(new Object());
when(comprehensionListExpression.getStart()).thenReturn(start);
when(comprehensionListExpression.getEnd()).thenReturn(end);
when(request.getEnvironment().getRenderEnvironment().getCalculateExpressionService().calculate(request, start)).thenReturn(startValue);
when(request.getEnvironment().getRenderEnvironment().getCalculateExpressionService().calculate(request, end)).thenReturn(endValue);
when(request.getEnvironment().getListEnumerationStrategy().enumerate(request, startValue, endValue)).thenReturn(Optional.of(expected));
Object result = underTest.calculate(request, comprehensionListExpression);
assertSame(expected, result);
}
}