Merge pull request #3 from owenrumney/refactoring

Add lots of tests

.travis.yml

@@ -5,7 +5,7 @@ env:
   matrix:
   - GO111MODULE=on
   global:
-  - secure: LcoQjG0F9aI/duFMq4z7CXPZAeNj0+Kiu5Iht0CIZlEEEkxlCqqM/YdOlKUNeq1cgengiG3gD89HPMT1jtwto2Ay/YE9tHKwRNZUVCpd/xUhNa0OorO6YZgbn0ikWzQNz8lsfnUlzX2CEkB1BAvPUbVWaS79AvJ/VYVgRWYAUsjNYswnItJJ/7DtTGXRHasr+TxtXBIXYKGsWBHxA66IvCovRBudR9mxlAFQHc4TLdl01nOIJ66eJPV9F5R/GYLKdbTYx4vVUj/9C/st9Or4DwMNF4fnZBpXnE5v77YUXjfMYROko9+j7p5ijMpUxXjUwg4hOdJzPTaflujK6+OmtaSu5ZnkcGwqDsZyqLkjQOACY9fHVbdWKLmXfA2lVFgTpNYZXFgoeapv+ywTZL4isIip0IbmkhQB07hMJU4dq+P8mOzqXDTnPRwmkknNTVc6C8HnOCx8Bs02T4M6/raJUUAQoG7e1+vRjO52FHVJMjAOHOaV2rBhVHN4G6bJW/ZgyoAWOcVKv0cLYb3TChZbCRMsNE6OH63y8NqH0qwJa4LJukJ9ctXCu2sdzl2AwmkO2BsYpScacoXaO0mbxNIjqakmXjiYJfuYHkA6iDzuURS+quGN0KDfC2oyi6gFxGGXQV5qezFHv1IMU+f0VkdJrlmJ+CYWDnsS40ayEMWhKa4=
+    secure: 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
 script:
 - go vet ./...
 - go test -v ./...