bcherny · bcherny · Sep 12, 2021 · Jun 2, 2021 · Jun 2, 2021
diff --git a/src/normalizer.ts b/src/normalizer.ts
@@ -139,7 +139,7 @@ rules.set('Transform $defs to definitions', schema => {
 })
 
 rules.set('Transform const to singleton enum', schema => {
-  if (schema.const) {
+  if (schema.const !== undefined) {
     schema.enum = [schema.const]
     delete schema.const
   }

diff --git a/test/__snapshots__/test/test.ts.md b/test/__snapshots__/test/test.ts.md
@@ -9010,3 +9010,14 @@ Generated by [AVA](https://avajs.dev).
       [k: string]: unknown;␊
     }␊
     `
+
+## Normalize empty const to singleton enum
+
+> Snapshot 1
+
+    `{␊
+      "id": "foo",␊
+      "enum": [␊
+        ""␊
+      ]␊
+    }`
diff --git a/test/__snapshots__/test/test.ts.snap b/test/__snapshots__/test/test.ts.snap
diff --git a/test/normalizer/emptyStringConstToEnum.json b/test/normalizer/emptyStringConstToEnum.json
@@ -0,0 +1,11 @@
+{
+  "name": "Normalize empty const to singleton enum",
+  "in": {
+    "id": "foo",
+    "const": ""
+  },
+  "out": {
+    "id": "foo",
+    "enum": [""]
+  }
+}