Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test2/functionName/functionName.test.js

@@ -0,0 +1,19 @@
+import expect from 'expect';
+let output = '';
+const console = {};
+console.debug = (x) => output = x;
+// Override for testing
+const functionName = fn => (console.debug(fn.name), fn);
+test('Testing functionName', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof functionName === 'function').toBeTruthy();
+  functionName(Math.max);
+  expect(output).toBe('max');
+  function fun(x) {return x;}
+  functionName(fun);
+  expect(output).toBe('fun');
+  const fn = x => x;
+  functionName(fn);
+  expect(output).toBe('fn');
+});