fix(): Add a test to ensure that numbers are supported

I also reformatted a few lines in the test suite to match the project formatting standard.
TAG: latest

fixes #120

Author: ericmorand-emakina

test/index.js

@@ -33,6 +33,7 @@ const actuals = {
     'function (a = (true, null)) {}',
     'function (a = (true, "bar")) {}',
     'function (a, b = (i++, true)) {}',
+    'function (a = 1) {}',
   ],
   named: [
     'function namedFn (a = {foo: "ba)r", baz: 123}, cb, ...restArgs) {return a * 3}',
@@ -44,6 +45,7 @@ const actuals = {
     'function namedFn(a = (true, null)) {}',
     'function namedFn(a = (true, "bar")) {}',
     'function namedFn(a, b = (i++, true)) {}',
+    'function namedFn(a = 1) {}',
   ],
   generators: [
     'function * namedFn (a = {foo: "ba)r", baz: 123}, cb, ...restArgs) {return a * 3}',
@@ -55,6 +57,7 @@ const actuals = {
     'function * namedFn(a = (true, null)) {}',
     'function * namedFn(a = (true, "bar")) {}',
     'function * namedFn(a, b = (i++, true)) {}',
+    'function * namedFn(a = 1) {}',
   ],
   arrows: [
     '(a = {foo: "ba)r", baz: 123}, cb, ...restArgs) => {return a * 3}',
@@ -66,6 +69,7 @@ const actuals = {
     '(a = (true, null)) => {}',
     '(a = (true, "bar")) => {}',
     '(a, b = (i++, true)) => {}',
+    '(a = 1) => {}',
     '(a) => a * 3 * a',
     'd => d * 355 * d',
     'e => {return e + 5235 / e}',
@@ -130,28 +134,35 @@ const regulars = [
     params: 'a',
     args: ['a'],
     body: '',
-    defaults: {a: 'false'},
+    defaults: { a: 'false' },
   },
   {
     name: null,
     params: 'a',
     args: ['a'],
     body: '',
-    defaults: {a: 'null'},
+    defaults: { a: 'null' },
   },
   {
     name: null,
     params: 'a',
     args: ['a'],
     body: '',
-    defaults: {a: '"bar"'},
+    defaults: { a: '"bar"' },
   },
   {
     name: null,
     params: 'a, b',
     args: ['a', 'b'],
     body: '',
-    defaults: {a: undefined, b: 'true'},
+    defaults: { a: undefined, b: 'true' },
+  },
+  {
+    name: null,
+    params: 'a',
+    args: ['a'],
+    body: '',
+    defaults: { a: '1' },
   },
 ]