Add tests for custom type nillability

Author: andrew-farries

tests/data/schemaExtensions/nillable/nillability.go

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "type": "object",
+  "properties": {
+    "name": {
+      "type": "string",
+      "goJSONSchema": {
+        "nillable": true,
+        "type": "map[bool]string"
+      }
+    }
+  }
+}

tests/data/schemaExtensions/nillable/nillability.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "type": "object",
+  "properties": {
+    "name": {
+      "type": "string",
+      "goJSONSchema": {
+        "nillable": false,
+        "type": "map[bool]string"
+      }
+    }
+  }
+}

tests/data/schemaExtensions/nonNillable/nillability.go

@@ -185,6 +185,12 @@ func TestRegressions(t *testing.T) {
 	testExamples(t, basicConfig, "./data/regressions")
 }
 
+func TestSchemaExtensions(t *testing.T) {
+	t.Parallel()
+
+	testExamples(t, basicConfig, "./data/schemaExtensions")
+}
+
 func testExampleFile(t *testing.T, cfg generator.Config, fileName string) {
 	t.Helper()