Test output for invalid syntax in elm input file.

InvalidIpc.elm

@@ -0,0 +1 @@
+This is not a valid elm file.

src/elm-electron.ts

@@ -16,9 +16,9 @@ if (fs.existsSync(inputPath)) {
     fs.writeFileSync(elmPath, elmCode)
   })
 
-  app.ports.parsingError.subscribe(function(outputFile: any) {
-    console.log(`Error parsing input file ${inputPath}\n`)
-    console.log(outputFile)
+  app.ports.parsingError.subscribe(function(errorString: string) {
+    console.error(`Error parsing input file ${inputPath}\n`)
+    console.error(errorString)
     process.exit(1)
   })
 } else {

tests/e2e/e2e.ts

@@ -71,7 +71,7 @@ const expectCommandSuccess = (command: string) => {
 }
 
 describe('end to end', function() {
-  it('gives error for invalid input file', () => {
+  it('gives error for non-existent input file', () => {
     const binFile = path.join(__dirname, '../../bin/elm-electron')
     const ipcFile = path.join(__dirname, 'NonExistentIpc.elm')
     const outputElmPath = path.join(__dirname, '../../generated', 'Result.elm')
@@ -81,6 +81,16 @@ describe('end to end', function() {
     assertCommandOutput(command, 'nonexistentInputFileError')
   }).timeout(30000)
 
+  it('gives error for invalid syntax input file', () => {
+    const binFile = path.join(__dirname, '../../bin/elm-electron')
+    const ipcFile = path.join(__dirname, '../../InvalidIpc.elm')
+    const outputElmPath = path.join(__dirname, '../../generated', 'Result.elm')
+    const outputTsPath = path.join(__dirname, '../../generated', 'result.ts')
+    const command = `/usr/local/bin/node ${binFile} ${ipcFile} --ts ${outputTsPath} --elm ${outputElmPath}`
+    expectCommandSuccess(`/usr/local/bin/npm run build`)
+    assertCommandOutput(command, 'invalidSyntaxInputFileError')
+  }).timeout(30000)
+
   it('generates ts and elm files with a valid input file', () => {
     const binFile = path.join(__dirname, '../../bin/elm-electron')
     const ipcFile = path.join(__dirname, 'Ipc.elm')

tests/e2e/invalidSyntaxInputFileError.approved.txt

@@ -0,0 +1,6 @@
+{
+  "type": "error-result",
+  "stderr": "Error parsing input file /Users/dillon/Dropbox/opensource/elm-electron/InvalidIpc.elm\n\nErr ((),{ data = \"This is not a valid elm file.\\n\", input = \"This is not a valid elm file.\\n\", position = 0 },[\"expected end of input\"])\n",
+  "stdout": "",
+  "status": 1
+}