Closes #311. Show more informative error when beautifier not found

spec/atom-beautify-spec.coffee

@@ -1,29 +1,67 @@
-Beautify = require '../src/beautify'
+Beautifiers = require "../src/beautifiers"
+beautifiers = new Beautifiers()
+Beautifier = require "../src/beautifiers/beautifier"
 
 # Use the command `window:run-package-specs` (cmd-alt-ctrl-p) to run specs.
 #
 # To run a specific `it` or `describe` block add an `f` to the front (e.g. `fit`
 # or `fdescribe`). Remove the `f` to unfocus the block.
 
-describe "AtomBeautify", ->
-  activationPromise = null
+describe "Atom-Beautify", ->
 
     beforeEach ->
-    atom.workspaceView = new WorkspaceView
-    activationPromise = atom.packages.activatePackage('atomBeautify')
 
-#  describe "when the beautify event is triggered", ->
-#    it "attaches and then detaches the view", ->
-#      expect(atom.workspaceView.find('.atom-beautify')).not.toExist()
-#
-#      # This is an activation event, triggering it will cause the package to be
-#      # activated.
-#      atom.workspaceView.trigger 'beautify'
-#
-#      waitsForPromise ->
-#        activationPromise
-#
+        # Activate package
+        waitsForPromise ->
+            activationPromise = atom.packages.activatePackage('atom-beautify')
+            # Force activate package
+            pack = atom.packages.getLoadedPackage("atom-beautify")
+            pack.activateNow()
+            # Change logger level
+            # atom.config.set('atom-beautify._loggerLevel', 'verbose')
+            # Return promise
+            return activationPromise
+
+    describe "Beautifiers", ->
+
+        describe "Beautifier::run", ->
+
+            beautifier = null
+
+            beforeEach ->
+                beautifier = new Beautifier()
+
+            it "should error when beautifier's program not found", ->
+                expect(beautifier).not.toBe(null)
+                expect(beautifier instanceof Beautifier).toBe(true)
+
+                # waitsForRuns = (fn, message, timeout) ->
+                #     isCompleted = false
+                #     completed = ->
+                #         console.log('completed')
+                #         isCompleted = true
                 #     runs ->
-#        expect(atom.workspaceView.find('.atom-beautify')).toExist()
-#        atom.workspaceView.trigger 'beautify'
-#        expect(atom.workspaceView.find('.atom-beautify')).not.toExist()
+                #         console.log('runs')
+                #         fn(completed)
+                #     waitsFor(->
+                #         console.log('waitsFor', isCompleted)
+                #         isCompleted
+                #     , message, timeout)
+                #
+                # waitsForRuns((cb) ->
+                #     console.log('waitsForRuns', cb)
+                #     setTimeout(cb, 2000)
+                # , "Waiting for beautification to complete", 5000)
+
+                waitsForPromise shouldReject: true, ->
+                    p = beautifier.run("program", [])
+                    expect(p).not.toBe(null)
+                    expect(p instanceof beautifier.Promise).toBe(true)
+                    cb = (v) ->
+                        # console.log(v)
+                        expect(v).not.toBe(null)
+                        expect(v instanceof Error).toBe(true)
+                        expect(v.code).toBe("CommandNotFound")
+                        return v
+                    p.then(cb, cb)
+                    return p

src/beautifiers/beautifier.coffee

@@ -135,7 +135,7 @@ module.exports = class Beautifier
     ###
     Run command-line interface command
     ###
-    run: (executable, args, {ignoreReturnCode} = {}) ->
+    run: (executable, args, {ignoreReturnCode, help} = {}) ->
         # Resolve executable
         Promise.resolve(executable)
         .then((exe) =>
@@ -173,6 +173,29 @@ module.exports = class Beautifier
                         )
                         cmd.on('error', (err) =>
                             @debug('error', err)
+                            # Check if error is ENOENT (command could not be found)
+                            if err.code is 'ENOENT' or err.errno is 'ENOENT'
+                                # Create new improved error
+                                # notify user that it may not be installed or in path
+                                message = "Could not find '#{exe}'. The program may not be installed."
+                                er = new Error(message) # +(if help then "\n\n#{help}" else "")
+                                if help?
+                                    if typeof help is "object"
+                                        helpStr = "See #{help.link} for program installation instructions.\n"
+                                        helpStr += "You can configure Atom Beautify with the absolute path \
+                                            to '#{help.program or exe}' by setting '#{help.pathOption}' in \
+                                            the Atom Beautify package settings.\n" if help.pathOption
+                                        helpStr += help.additional if help.additional
+                                        er.description = helpStr
+                                    else #if typeof help is "string"
+                                        er.description = help
+                                er.code = 'CommandNotFound'
+                                er.errno = er.code
+                                er.syscall = 'beautifier::run'
+                                er.file = exe
+                                reject(er)
+                            else
+                                # continue as normal error
                                 reject(err)
                         )
                     )

src/beautify.coffee

@@ -76,7 +76,7 @@ beautify = ({onSave}) ->
 
             # console.log(e)
             stack = error.stack
-            detail = error.message
+            detail = error.description or error.message
             atom.notifications?.addError(error.message, {
                 stack, detail, dismissable : true})