Just a commit

crystal/current

@@ -0,0 +1 @@
+hello-world

crystal/hello-world/GETTING_STARTED.md

@@ -0,0 +1,10 @@
+# Welcome to Crystal!
+
+## Installation
+
+*Note: Currently, Crystal only supports Linux and OSX.*
+
+Use one of the [installation guides](http://crystal-lang.org/docs/installation/index.html) for instructions on installing Crystal.
+
+## Running Tests
+`crystal spec hello_world_spec.cr`

crystal/hello-world/README.md

@@ -0,0 +1,70 @@
+# Hello World
+
+Write a function that greets the user by name, or by saying "Hello, World!" if no name is given.
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is the traditional first program for beginning programming in a new language.
+
+**Note:** You can skip this exercise by running:
+
+    exercism skip $LANGUAGE hello-world
+
+## Specification
+
+Write a `Hello World!` function that can greet someone given their name.
+The function should return the appropriate greeting.
+
+For an input of "Alice", the response should be "Hello, Alice!".
+
+If a name is not given, the response should be "Hello, World!"
+
+## Test-Driven Development
+
+As programmers mature, they eventually want to test their code.
+
+Here at Exercism we simulate [Test-Driven Development](http://en.wikipedia.org/wiki/Test-driven_development) (TDD), where you write your tests before writing any functionality. The simulation comes in the form of a pre-written test suite, which will signal that you have solved the problem.
+
+It will also provide you with a safety net to explore other solutions without breaking the functionality.
+
+### A typical TDD workflow on Exercism:
+
+1. Run the test file and pick one test that's failing.
+2. Write some code to fix the test you picked.
+3. Re-run the tests to confirm the test is now passing.
+4. Repeat from step 1.
+5. Submit your solution (`exercism submit /path/to/file`)
+
+## Instructions
+
+Submissions are encouraged to be general, within reason. Having said that, it's also important not to over-engineer a solution.
+
+It's important to remember that the goal is to make code as expressive and readable as we can. However, solutions to the hello-world exercise will not be reviewed by a person, but by rikki- the robot, who will offer an encouraging word.
+
+## Setup
+
+Follow the setup instructions for Crystal here:
+
+http://exercism.io/languages/crystal
+
+More help installing can be found here:
+
+http://crystal-lang.org/docs/installation/index.html
+
+## Making the Test Suit Pass
+
+Execute the tests with:
+
+```bash
+$ crystal spec test_spec.cr
+```
+
+In each test suite all but the first test have been skipped.
+
+Once you get a test passing, you can unskip the next one by changing `pending` to `it`.
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+## Submitting Incomplete Problems
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.
+

crystal/hello-world/hello_world_spec.cr

@@ -0,0 +1,18 @@
+require "spec"
+require "./hello_world"
+
+describe "HelloWorld" do
+  describe "#hello" do
+    it "says hello with default 'World'" do
+      HelloWorld.hello.should eq "Hello, World"
+    end
+
+    pending "says hello with one name" do
+      HelloWorld.hello("Max").should eq "Hello, Max"
+    end
+
+    pending "says hello with another name" do
+      HelloWorld.hello("Alice").should eq "Hello, Alice"
+    end
+  end
+end