feat(challenge): add tests for the timestamp microservice challenge

challenges/05-apis-and-microservices/apis-and-microservices-projects.json

@@ -14,16 +14,28 @@
       ],
       "tests": [
         {
-          "text": "I can pass a string as a parameter, and it will check to see whether that string contains either a unix timestamp or a natural language date (example: January 1, 2016).",
-          "testString": ""
+          "text": "It should handle a valid date, and return the correct unix timestamp",
+          "testString": "getUserInput => $.get(getUserInput('url') + '/api/timestamp/2016-12-25').then(data => { assert.equal(data.unix, 1482624000000, 'Should be a valid unix timestamp'); }, xhr => { throw new Error(xhr.responseText); })"
         },
         {
-          "text": "If it does, it returns both the Unix timestamp and the natural language form of that date.",
-          "testString": ""
+          "text": "It should handle a valid date, and return the correct UTC string",
+          "testString": "getUserInput => $.get(getUserInput('url')+ '/api/timestamp/2016-12-25').then(data => { assert.equal(data.utc, 'Sun, 25 Dec 2016 00:00:00 GMT', 'Should be a valid UTC date string'); }, xhr => { throw new Error(xhr.responseText); })"
         },
         {
-          "text": "If it does not contain a date or Unix timestamp, it returns null for those properties.",
-          "testString": ""
+          "text": "It should handle a valid unix date, and return the correct unix timestamp",
+          "testString": "getUserInput => $.get(getUserInput('url') + '/api/timestamp/1482624000000').then(data => { assert.equal(data.unix, 1482624000000) ;  }, xhr => { throw new Error(xhr.responseText); })"
+        },
+        {
+          "text": "It should return the expected error message for an invalid date",
+          "testString": "getUserInput => $.get(getUserInput('url') + '/api/timestamp/this-is-not-a-date').then(data => { assert.equal(data.error.toLowerCase(), 'invalid date');}, xhr => { throw new Error(xhr.responseText); })"
+        },
+        {
+          "text": "It should handle an empty date parameter, and return the current time in unix format",
+          "testString": "getUserInput => $.get(getUserInput('url') + '/api/timestamp').then(data => { var now = Date.now(); assert.approximately(data.unix, now, 20000) ;}, xhr => { throw new Error(xhr.responseText); })"
+        },
+        {
+          "text": "It should handle an empty date parameter, and return the current time in UTC format",
+          "testString": "getUserInput => $.get(getUserInput('url') + '/api/timestamp').then(data => { var now = Date.now(); var serverTime = (new Date(data.utc)).getTime(); assert.approximately(serverTime, now, 20000) ;}, xhr => { throw new Error(xhr.responseText); })"
         }
       ],
       "solutions": [],