tdd-java-demo

RunnerTest.java

(1406B)

 package takehome;
 
 import org.junit.jupiter.api.Test;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.util.Arrays;
 import java.util.List;
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.hasItem;
 
 class RunnerTest {
 
     @Test
     public void example() {
         assertThat(output("2", "1", "1", "2", "0"), contains(
                 "How much soup? ",
                 "How much bread? ",
                 "How much milk? ",
                 "How much apple? ",
                 "Purchase day (0 for today, 1 for tomorrow, etc): ",
                 "Total: $3.20"
         ));
     }
 
     @Test
     public void totals() {
         assertThat(output("3", "2", "0", "0", "0"), hasItem("Total: $3.15"));
         assertThat(output("0", "0", "1", "6", "0"), hasItem("Total: $1.90"));
         assertThat(output("0", "0", "1", "6", "5"), hasItem("Total: $1.84"));
         assertThat(output("2", "1", "0", "3", "5"), hasItem("Total: $1.97"));
     }
 
     private List<String> output(String ...inputs) {
         String input = String.join("\r", inputs);
         ByteArrayInputStream in = new ByteArrayInputStream(input.getBytes());
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         new Runner(in, out).run();
         return Arrays.asList(out.toString().split("\n"));
     }
 }