add fibonacci

README.md

@@ -14,5 +14,3 @@ The first exercise, `helloWorld` will walk you through the process in more depth
 ## planned exercises (in no particular order for the moment):
 1. book titles (MC)
 1. pig latin (MC)
-1. fibonacci 
-1. convert to snake case

fibonacci/README.md

@@ -0,0 +1,10 @@
+# Exercise XX - fibonacci
+
+Create a function that returns a specific member of the fibonacci sequence:
+
+> a series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.
+
+```javascript
+fibonacci(4) // returns the 4th member of the series: 3  (1, 1, 2, 3)
+fibonacci(6) // returns 8
+```

fibonacci/fibonacci.js

@@ -0,0 +1,5 @@
+var fibonacci = function() {
+
+}
+
+module.exports = fibonacci

fibonacci/fibonacci.spec.js

@@ -0,0 +1,25 @@
+var fibonacci = require('./fibonacci')
+
+describe('fibonacci', function() {
+  it('works', function() {
+    expect(fibonacci(4)).toEqual(3);
+  });
+  xit('works', function() {
+    expect(fibonacci(6)).toEqual(8);
+  });
+  xit('works', function() {
+    expect(fibonacci(10)).toEqual(55);
+  });
+  xit('works', function() {
+    expect(fibonacci(15)).toEqual(610);
+  });
+  xit('works', function() {
+    expect(fibonacci(25)).toEqual(75025);
+  });
+  xit('doesn\'t accept negatives', function() {
+    expect(fibonacci(-25)).toEqual("OOPS");
+  });
+  xit('DOES accept strings', function() {
+    expect(fibonacci("8")).toEqual(21);
+  });
+});