Changed 14.7

Author: mattpocock

src/03-art-of-type-arguments/14.7-string-number-union.problem.ts

@@ -13,3 +13,11 @@ type tests = [
   Expect<Equal<typeof result1, { output: "a" }>>,
   Expect<Equal<typeof result2, { output: 123 }>>
 ];
+
+// @ts-expect-error
+const error1 = inferItemLiteral({
+  a: 1,
+});
+
+// @ts-expect-error
+const error2 = inferItemLiteral([1, 2]);

src/03-art-of-type-arguments/14.7-string-number-union.solution.ts

@@ -11,5 +11,13 @@ const result2 = inferItemLiteral(123);
 
 type tests = [
   Expect<Equal<typeof result1, { output: "a" }>>,
-  Expect<Equal<typeof result2, { output: 123 }>>,
+  Expect<Equal<typeof result2, { output: 123 }>>
 ];
+
+// @ts-expect-error
+const error1 = inferItemLiteral({
+  a: 1,
+});
+
+// @ts-expect-error
+const error2 = inferItemLiteral([1, 2]);