Phone book done!

I cheated and didn't modify the starter code so it's testable. It seems
that starter code in this course is not written as well as the first
course.

1 files changed, 26 insertions, 0 deletions

diff --git a/src/test/PhoneBookTest.java b/src/test/PhoneBookTest.java
new file mode 100644
index 0000000..fb898f0
--- /dev/null
+++ b/src/test/PhoneBookTest.java
@@ -0,0 +1,26 @@
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class PhoneBookTest {
+    @Test
+    void test() {
+        PhoneBook.add(911, "police");
+        PhoneBook.add(76213, "Mom");
+        PhoneBook.add(17239, "Bob");
+
+        assertEquals("Mom", PhoneBook.find(76213));
+        assertEquals("not found", PhoneBook.find(910));
+        assertEquals("police", PhoneBook.find(911));
+
+        PhoneBook.del(910);
+        PhoneBook.del(911);
+
+        assertEquals("not found", PhoneBook.find(911));
+        assertEquals("Mom", PhoneBook.find(76213));
+
+        PhoneBook.add(76213, "daddy");
+        assertEquals("daddy", PhoneBook.find(76213));
+    }
+
+}
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