Add exercise: gigasecond

config.json

@@ -22,6 +22,13 @@
         "exceptions"
       ]
     },
+    {
+      "slug": "gigasecond",
+      "difficulty": 1,
+      "topics": [
+        "dates"
+      ]
+    },
     {
       "slug": "difference-of-squares",
       "difficulty": 1,

exercises/gigasecond/example.jl

@@ -0,0 +1 @@
+add_gigasecond(date::DateTime) = date + Dates.Second(10^9)

exercises/gigasecond/gigasecond.jl

@@ -0,0 +1,3 @@
+function add_gigasecond(date::DateTime)
+
+end

exercises/gigasecond/runtests.jl

@@ -0,0 +1,15 @@
+using Base.Test
+
+include("gigasecond.jl")
+
+samples = Dict(
+    DateTime("2011-04-25") => DateTime("2043-01-01T01:46:40"),
+    DateTime("1977-06-13") => DateTime("2009-02-19T01:46:40"),
+    DateTime("1959-07-19") => DateTime("1991-03-27T01:46:40"),
+    DateTime("2015-01-24T22:00:00") => DateTime("2046-10-02T23:46:40"),
+    DateTime("2015-01-24T23:59:59") => DateTime("2046-10-03T01:46:39")
+)
+
+@testset "add gigasecond to $sample[1]" for sample in samples
+    @test add_gigasecond(sample[1]) == sample[2]
+end