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test/static/optional.ts

@@ -0,0 +1,49 @@
+import { Expect } from './assert'
+import { Type, Static } from '@sinclair/typebox'
+
+{
+  const T = Type.Object({
+    A: Type.Optional(Type.String()),
+  })
+  type T = Static<typeof T>
+
+  Expect(T).ToStatic<{
+    A?: string
+  }>()
+}
+// Noop
+// prettier-ignore
+{
+  const T = Type.Object({
+    A: Type.Optional(Type.String(), false),
+  })
+  type T = Static<typeof T>
+
+  Expect(T).ToStatic<{
+    A: string
+  }>()
+}
+// Additive
+// prettier-ignore
+{
+  const T = Type.Object({
+    A: Type.Optional(Type.String(), true),
+  })
+  type T = Static<typeof T>
+
+  Expect(T).ToStatic<{
+    A?: string
+  }>()
+}
+// Subtractive
+// prettier-ignore
+{
+  const T = Type.Object({
+    A: Type.Optional(Type.Optional(Type.String()), false)
+  })
+  type T = Static<typeof T>
+
+  Expect(T).ToStatic<{
+    A: string
+  }>()
+}