package stack.expr;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class InfixExprTest {
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void testEvaluate() {
{
InfixExpr expr = new InfixExpr("1*2*2-1");
Assert.assertEquals(3.0, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("2+3*4+5");
Assert.assertEquals(19.0, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("2+3*4+5*1+1");
Assert.assertEquals(20.0, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("2+3*4/2+1");
Assert.assertEquals(9, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("2-3*4/2-1");
Assert.assertEquals(-5.0, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("6-1*5+2+0");
Assert.assertEquals(3.0, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("3*20/2");
Assert.assertEquals(30, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("3*20/2+1");
Assert.assertEquals(31, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("3*20/2+1-1");
Assert.assertEquals(30, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("20/2*3");
Assert.assertEquals(30, expr.evaluate(), 0.001f);
}
{
InfixExpr expr = new InfixExpr("10-30+50");
Assert.assertEquals(30, expr.evaluate(), 0.001f);
}
}
}