tdd-java-demo

commit 15d826ef712154be07e35ca607f75db1349e2405
parent 9efc6c7e6833e227cd988d6ed90ffd751b62812e
Author: Jul <jul@9o.is>
Date:   Wed, 31 Mar 2021 15:40:38 +0800

outputs total of $0.65 for one soup

Diffstat:
M
src/main/java/takehome/Runner.java
 | 
9
++++++++-
M
src/test/java/takehome/RunnerTest.java
 | 
16
++++++++++++++--

2 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/src/main/java/takehome/Runner.java b/src/main/java/takehome/Runner.java
@@ -3,16 +3,23 @@ package takehome;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PrintStream;
+import java.text.DecimalFormat;
+import java.util.Scanner;
 
 public class Runner {
     private final PrintStream out;
+    private final Scanner in;
 
     public Runner(InputStream in, OutputStream out) {
         this.out = new PrintStream(out);
+        this.in = new Scanner(in);
     }
 
     public void run() {
         out.println("How much soup?");
-        out.println("Total: $0.00");
+        double total = in.nextInt() * 0.65;
+
+        DecimalFormat df = new DecimalFormat("0.00");
+        out.println("Total: $" + df.format(total));
     }
 }
diff --git a/src/test/java/takehome/RunnerTest.java b/src/test/java/takehome/RunnerTest.java
@@ -13,15 +13,27 @@ import static org.hamcrest.Matchers.contains;
 class RunnerTest {
 
     @Test
-    public void example() {
+    public void noItems() {
         assertThat(output(), contains(
                 "How much soup?",
                 "Total: $0.00"
         ));
     }
 
+    @Test
+    public void oneSoup() {
+        assertThat(output("1"), contains(
+                "How much soup?",
+                "Total: $0.65"
+        ));
+    }
+
     private List<String> output() {
-        ByteArrayInputStream in = new ByteArrayInputStream("".getBytes());
+        return output("0");
+    }
+
+    private List<String> output(String input) {
+        ByteArrayInputStream in = new ByteArrayInputStream(input.getBytes());
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         new Runner(in, out).run();
         return Arrays.asList(out.toString().split("\n"));