Merge pull request JuliaLang#42 from aawray/ex-pangram

Add exercise: pangram

config.json

@@ -69,7 +69,7 @@
       "topics": [
         "control-flow (conditionals)",
         "integers",
-		"mathematics"
+        "mathematics"
       ]
     },
     {
@@ -139,6 +139,15 @@
         "filtering"
       ]
     },
+    {
+      "slug": "pangram",
+      "difficulty": 1,
+      "topics": [
+        "arrays",
+        "strings",
+        "filtering"
+      ]
+    },
     {
       "slug": "bob",
       "difficulty": 2,

exercises/pangram/example.jl

@@ -0,0 +1,2 @@
+ispangram(input::AbstractString) = length(Set(matchall(r"[a-z]", lowercase(input)))) == 26
+

exercises/pangram/pangram.jl

@@ -0,0 +1,4 @@
+function ispangram(input::AbstractString)
+
+end
+

exercises/pangram/runtests.jl

@@ -0,0 +1,40 @@
+using Base.Test
+
+include("pangram.jl")
+
+@testset "empty sentence" begin
+    @test !ispangram("")
+end
+
+@testset "pangram with only lower case" begin
+    @test ispangram("the quick brown fox jumps over the lazy dog")
+end
+
+@testset "missing character 'x'" begin
+    @test !ispangram("a quick movement of the enemy will jeopardize five gunboats")
+end
+
+@testset "another missing character 'x'" begin
+    @test !ispangram("the quick brown fish jumps over the lazy dog")
+end
+
+@testset "pangram with underscores" begin
+    @test ispangram("the_quick_brown_fox_jumps_over_the_lazy_dog")
+end
+
+@testset "pangram with numbers" begin
+    @test ispangram("the 1 quick brown fox jumps over the 2 lazy dogs")
+end
+
+@testset "missing letters replaced by numbers" begin
+    @test !ispangram("7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog")
+end
+
+@testset "pangram with mixed case and punctuation" begin
+    @test ispangram("\"Five quacking Zephyrs jolt my wax bed.\"")
+end
+
+@testset "upper and lower case versions of the same character should not be counted separately" begin
+    @test !ispangram("the quick brown fox jumped over the lazy FOX")
+end
+