Add more tests

Author: ehmicky

src/main.test.js

@@ -70,3 +70,10 @@ test.serial('Can use .beautiful() deeply', (t) => {
   t.true(consoleArg.includes(`${figures.cross} Error: test`))
   t.true(consoleArg.includes(`\n    ${figures.cross} CUSTOMERROR: INNER`))
 })
+
+test.serial('Can use "custom" option', (t) => {
+  const error = new Error('test')
+  error.pretty = (errorString) => errorString.toUpperCase()
+  const { consoleArg } = handleError(error, { custom: 'pretty' })
+  t.true(consoleArg.includes(`${figures.cross} ERROR: TEST`))
+})

src/options/validate.test.js

@@ -30,6 +30,7 @@ each(
     { timeout: Number.NaN },
     { timeout: Number.NEGATIVE_INFINITY },
     { timeout: -1 },
+    { custom: 0 },
     { unknown: true },
     { classes: true },
     { classes: { default: true } },