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14 changes: 12 additions & 2 deletions format-clock-edge-cases/timeConverter.js
Original file line number Diff line number Diff line change
@@ -1,11 +1,21 @@
function formatAs12HourClock(time) {

const hours = Number(time.slice(0, 2));
const minutes = time.slice(3);

if (hours === 0) {
return `12:${minutes} am`;
}

if (hours === 12) {
return `${time} pm`;
}

if (hours > 12) {
return `${hours - 12}:00 pm`;
return `${hours - 12}:${minutes} pm`;
}

return `${time} am`;
}

export {formatAs12HourClock};
export {formatAs12HourClock};
22 changes: 22 additions & 0 deletions format-clock-edge-cases/timeConverter.test.js
Original file line number Diff line number Diff line change
Expand Up @@ -9,3 +9,25 @@ test("correctly convert time after 12:00", function(){
test("can correctly convert morning time", function() {
assert.equal(formatAs12HourClock("08:00"), "08:00 am");
});

test("correctly convert midnight", function() {
assert.equal(formatAs12HourClock("00:00"), "12:00 am");
});
test("correctly convert noon", function() {
assert.equal(formatAs12HourClock("12:00"), "12:00 pm");
});
test("correctly convert 13:00", function() {
assert.equal(formatAs12HourClock("13:00"), "1:00 pm");
});
test("correctly keep the minutes", function() {
assert.equal(formatAs12HourClock("13:45"), "1:45 pm");
});
test("correctly convert 12:30", function() {
assert.equal(formatAs12HourClock("12:30"), "12:30 pm");
});
test("correctly convert the last minute of the day", function() {
assert.equal(formatAs12HourClock("23:59"), "11:59 pm");
});
test("correctly convert 00:30", function() {
assert.equal(formatAs12HourClock("00:30"), "12:30 am");
});
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