Add tests for utility class

spec/utility-spec.coffee

@@ -0,0 +1,25 @@
+Utility = require '../lib/utility'
+
+describe "utility", ->
+  defaultNoteDirectory = atom.config.get('nvatom.directory')
+  defaultNoteExtensions = atom.config.get('nvatom.extensions')
+
+  afterEach ->
+    atom.config.set('nvatom.directory', defaultDirectory)
+    atom.config.set('nvatom.extensions', defaultNoteExtensions)
+
+  describe 'trim', ->
+    expect(Utility.trim(null)).toBe(undefined)
+    expect(Utility.trim(undefined)).toBe(undefined)
+    expect(Utility.trim('')).toBe('')
+    expect(Utility.trim('  ')).toBe('')
+    expect(Utility.trim('  hello world  ')).toBe('hello world')
+    expect(Utility.trim('  hello world\t\n\r  ')).toBe('hello world')
+
+  describe 'getPrimaryNoteExtension', ->
+    atom.config.set('nvatom.extensions', ['.md', '.markdown'])
+    expect(Utility.getPrimaryNoteExtension()).toBe('.md')
+    atom.config.set('nvatom.extensions', ['.markdown'])
+    expect(Utility.getPrimaryNoteExtension()).toBe('.markdown')
+    atom.config.set('nvatom.extensions', [])
+    expect(Utility.getPrimaryNoteExtension()).toBe('.md')