package structure.week7;
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("300*20+12*5-20/4");
{
InfixExpr expr = new InfixExpr("2+3*4+5");
try {
Assert.assertEquals(19.0, expr.evaluate(), 0.001f);
} catch (Exception e) {
e.printStackTrace();
}
}
{
InfixExpr expr = new InfixExpr("3*20+12*5-40/2");
try {
Assert.assertEquals(100.0, expr.evaluate(), 0.001f);
} catch (Exception e) {
e.printStackTrace();
}
}
{
InfixExpr expr = new InfixExpr("3*20/2");
try {
Assert.assertEquals(30, expr.evaluate(), 0.001f);
} catch (Exception e) {
e.printStackTrace();
}
}
{
InfixExpr expr = new InfixExpr("20/2*3");
try {
Assert.assertEquals(30, expr.evaluate(), 0.001f);
} catch (Exception e) {
e.printStackTrace();
}
}
{
InfixExpr expr = new InfixExpr("10-30+50");
try {
Assert.assertEquals(30, expr.evaluate(), 0.001f);
} catch (Exception e) {
e.printStackTrace();
}
}
{
InfixExpr expr = new InfixExpr("4*2*5+5-4*5/5*3/2*4-2+4*2+2/1");
try {
Assert.assertEquals(29, expr.evaluate(), 0.001f);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}