Add 4 assert tests and fix the error messages they gave in format-time.js

Author: habohlin

Sprint-3/5-stretch-extend/format-time.js

@@ -5,7 +5,9 @@
 function formatAs12HourClock(time) {
   const hours = Number(time.slice(0, 2));
   if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+    return `${hours - 12 < 10 ? "0" : ""}${hours - 12}:${time.slice(-2)} pm`;
+  } else if (hours === 12) {
+    return `${time} pm`;
   }
   return `${time} am`;
 }
@@ -14,12 +16,40 @@ const currentOutput = formatAs12HourClock("08:00");
 const targetOutput = "08:00 am";
 console.assert(
   currentOutput === targetOutput,
-  `current output: ${currentOutput}, target output: ${targetOutput}`
+  `current output: ${currentOutput}, target output: ${targetOutput}`,
 );
 
 const currentOutput2 = formatAs12HourClock("23:00");
 const targetOutput2 = "11:00 pm";
 console.assert(
   currentOutput2 === targetOutput2,
-  `current output: ${currentOutput2}, target output: ${targetOutput2}`
+  `current output: ${currentOutput2}, target output: ${targetOutput2}`,
+);
+
+const currentOutput3 = formatAs12HourClock("12:00");
+const targetOutput3 = "12:00 pm";
+console.assert(
+  currentOutput3 === targetOutput3,
+  `current output: ${currentOutput3}, target output: ${targetOutput3}`,
+);
+
+const currentOutput4 = formatAs12HourClock("15:45");
+const targetOutput4 = "03:45 pm";
+console.assert(
+  currentOutput4 === targetOutput4,
+  `current output: ${currentOutput4}, target output: ${targetOutput4}`,
+);
+
+const currentOutput5 = formatAs12HourClock("08:25");
+const targetOutput5 = "08:25 am";
+console.assert(
+  currentOutput5 === targetOutput5,
+  `current output: ${currentOutput5}, target output: ${targetOutput5}`,
+);
+
+const currentOutput6 = formatAs12HourClock("12:17");
+const targetOutput6 = "12:17 pm";
+console.assert(
+  currentOutput6 === targetOutput6,
+  `current output: ${currentOutput6}, target output: ${targetOutput6}`,
 );