Add tests

tests/cases/conformance/types/mapped/recursiveMappedTypes.ts

@@ -0,0 +1,15 @@
+// @declaration: true
+
+// Recursive mapped types simply appear empty
+
+type Recurse = {
+    [K in keyof Recurse]: Recurse[K]
+}
+
+type Recurse1 = {
+    [K in keyof Recurse2]: Recurse2[K]
+}
+
+type Recurse2 = {
+    [K in keyof Recurse1]: Recurse1[K]
+}