Merge pull request #7051 from erictleung/fix/clarify-ambiguity-for-counting-cards

Clarify Counting Cards instructions & add tests

challenges/01-front-end-development-certification/basic-javascript.json

@@ -3281,9 +3281,10 @@
       "description": [
         "In the casino game Blackjack, a player can gain an advantage over the house by keeping track of the relative number of high and low cards remaining in the deck. This is called <a href='https://en.wikipedia.org/wiki/Card_counting' target='_blank'>Card Counting</a>.",
         "Having more high cards remaining in the deck favors the player. Each card is assigned a value according to the table below. When the count is positive, the player should bet high. When the count is zero or negative, the player should bet low.",
-        "<table class=\"table table-striped\"><thead><tr><th>Value</th><th>Cards</th></tr></thead><tbody><tr><td>+1</td><td>2, 3, 4, 5, 6</td></tr><tr><td>0</td><td>7, 8, 9</td></tr><tr><td>-1</td><td>10, 'J', 'Q', 'K','A'</td></tr></tbody></table>",
+        "<table class=\"table table-striped\"><thead><tr><th>Count Change</th><th>Cards</th></tr></thead><tbody><tr><td>+1</td><td>2, 3, 4, 5, 6</td></tr><tr><td>0</td><td>7, 8, 9</td></tr><tr><td>-1</td><td>10, 'J', 'Q', 'K','A'</td></tr></tbody></table>",
         "You will write a card counting function. It will receive a <code>card</code> parameter and increment or decrement the global <code>count</code> variable according to the card's value (see table). The function will then return a string with the current count and the string <code>\"Bet\"</code> if the count is positive, or <code>\"Hold\"</code> if the count is zero or negative. The current count and the player's decision (<code>\"Bet\"</code> or <code>\"Hold\"</code>) should be separated by a single space.<br><br>",
-        "<strong>Example Output</strong><br><code>\"-3 Hold\"<br>\"5 Bet\"</code>"
+        "<strong>Example Output</strong><br><code>\"-3 Hold\"<br>\"5 Bet\"</code>",
+        "<strong>Hint</strong><br>Do NOT reset <code>count</code> to 0 when value is 7, 8, or 9."
       ],
       "releasedOn": "January 1, 2016",
       "challengeSeed": [
@@ -3308,6 +3309,8 @@
         "assert((function(){ count = 0; cc(2);cc(3);cc(4);cc(5);var out = cc(6); if(out === \"5 Bet\") {return true;} return false; })(), 'message: Cards Sequence 2, 3, 4, 5, 6 should return <code>\"5 Bet\"</code>');",
         "assert((function(){ count = 0; cc(7);cc(8);var out = cc(9); if(out === \"0 Hold\") {return true;} return false; })(), 'message: Cards Sequence 7, 8, 9 should return <code>\"0 Hold\"</code>');",
         "assert((function(){ count = 0; cc(10);cc('J');cc('Q');cc('K');var out = cc('A'); if(out === \"-5 Hold\") {return true;} return false; })(), 'message: Cards Sequence 10, J, Q, K, A should return <code>\"-5 Hold\"</code>');",
+        "assert((function(){ count = 0; cc(3);cc(7);cc('Q');cc(8);var out = cc('A'); if(out === \"-1 Hold\") {return true;} return false; })(), 'message: Cards Sequence 3, 7, Q, 8, A should return <code>\"-1 Hold\"</code>');",
+        "assert((function(){ count = 0; cc(2);cc('J');cc(9);cc(2);var out = cc(7); if(out === \"1 Bet\") {return true;} return false; })(), 'message: Cards Sequence 2, J, 9, 2, 7 should return <code>\"1 Bet\"</code>');",
         "assert((function(){ count = 0; cc(3);cc(2);cc('A');cc(10);var out = cc('K'); if(out === \"-1 Hold\") {return true;} return false; })(), 'message: Cards Sequence 3, 2, A, 10, K should return <code>\"-1 Hold\"</code>');"
       ],
       "type": "checkpoint",