Merge pull request #262 from netlify/chore/improve-error-message

feat: improve error message

Author: ehmicky

src/line_parser.js

@@ -96,7 +96,7 @@ const parseParts = function (from, parts) {
 
   const toIndex = parts.findIndex(isToPart)
   if (toIndex === -1) {
-    throw new Error('Missing destination path/URL')
+    throw new Error('The destination path/URL must start with "/", "http:" or "https:"')
   }
 
   const queryParts = parts.slice(0, toIndex)

tests/line_parser.js

@@ -162,8 +162,8 @@ each(
     { title: 'invalid_dot_netlify_path', errorMessage: /must not start/ },
     { title: 'invalid_no_to_no_status', errorMessage: /Missing destination/ },
     { title: 'invalid_no_to_status', errorMessage: /Missing "to" field/ },
-    { title: 'invalid_no_to_query', errorMessage: /Missing destination/ },
-    { title: 'invalid_no_slash', errorMessage: /Missing destination/ },
+    { title: 'invalid_no_to_query', errorMessage: /must start with/ },
+    { title: 'invalid_no_slash', errorMessage: /must start with/ },
     { title: 'invalid_mistaken_headers', errorMessage: /Missing destination/ },
   ],
   ({ title }, { fixtureName = title, errorMessage }) => {