fix: correctly generate anyOf on unions with string and boolean constant

Author: pixunil

src/TypeFormatter/LiteralUnionTypeFormatter.ts

@@ -71,13 +71,7 @@ export class LiteralUnionTypeFormatter implements SubTypeFormatter {
 export function isLiteralUnion(type: UnionType): boolean {
     return type
         .getFlattenedTypes()
-        .every(
-            (item) =>
-                item instanceof LiteralType ||
-                item instanceof NullType ||
-                item instanceof StringType ||
-                item instanceof EnumType,
-        );
+        .every((item) => item instanceof LiteralType || item instanceof NullType || item instanceof EnumType);
 }
 
 /**

test/valid-data/type-union/main.ts

@@ -6,6 +6,9 @@ type MyType4 = "s" | 1;
 type MyType5 = "s" | 1[];
 type MyType6 = ("s" | 1)[];
 
+type MyType7 = string | true;
+type MyType8 = "s" | true;
+
 export interface TypeUnion {
     var1: MyType1;
     var2: MyType2;
@@ -14,4 +17,7 @@ export interface TypeUnion {
     var4: MyType4;
     var5: MyType5;
     var6: MyType6;
+
+    var7: MyType7;
+    var8: MyType8;
 }

test/valid-data/type-union/schema.json

@@ -70,6 +70,27 @@
             ]
           },
           "type": "array"
+        },
+        "var7": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "const": true,
+              "type": "boolean"
+            }
+          ]
+        },
+        "var8": {
+          "enum": [
+            "s",
+            true
+          ],
+          "type": [
+            "string",
+            "boolean"
+          ]
         }
       },
       "required": [
@@ -78,7 +99,9 @@
         "var3",
         "var4",
         "var5",
-        "var6"
+        "var6",
+        "var7",
+        "var8"
       ],
       "type": "object"
     }