Fix assertions of union types

mafintosh · Aug 10, 2018 · 45b9708 · 45b9708
1 parent 20b299d
commit 45b9708
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/test/typings.ts b/test/typings.ts
@@ -49,9 +49,8 @@ const personValidator = createValidator({
 
 if (personValidator(input)) {
   assertType<string>(input.name)
-  assertType<number | undefined>(input.age)
-  input.age === undefined
-  input.age === 1
+  if (typeof input.age !== 'undefined') assertType<number>(input.age)
+  if (typeof input.age !== 'number') assertType<undefined>(input.age)
 }
 
 const namesValidator = createValidator({
@@ -139,7 +138,8 @@ const user2Validator = createValidator({
 
 if (user2Validator(input)) {
   assertType<{ first: string | undefined, last: string }>(input.name)
-  assertType<string | undefined>(input.name.first)
+  if (typeof input.name.first !== 'undefined') assertType<string>(input.name.first)
+  if (typeof input.name.first !== 'string') assertType<undefined>(input.name.first)
   assertType<string>(input.name.last)
 
   if (input.items !== undefined) {
@@ -165,7 +165,9 @@ const specificValuesValidator = createValidator({
 })
 
 if (specificValuesValidator(input)) {
-  assertType<true | 1000 | 'XX'>(input)
+  if (input !== true && input !== 1000) assertType<'XX'>(input)
+  if (input !== 1000 && input !== 'XX') assertType<true>(input)
+  if (input !== 'XX' && input !== true) assertType<1000>(input)
 }
 
 const metricValidator = createValidator({