Initial recurse test

stdlib-candidate/tests/mod.nu

@@ -1,3 +1,4 @@
 export module fs.nu
 export module record.nu
+export module recurse.nu
 export module str_xpend.nu

stdlib-candidate/tests/recurse.nu

@@ -0,0 +1,32 @@
+use std assert
+use ../std-rfc recurse
+
+const fixture = [
+    0
+    { a: 1 }
+    {
+        b: [
+            2
+            [
+                [c d];
+                [3 4]
+            ]
+        ]
+    }
+]
+
+export def test [] {
+    assert equal ($fixture | recurse) [
+        $fixture                        # [0, {a: 1}, {b: [2, [[c, d]; [3, 4]]]}]
+        $fixture.0                      # 0
+        $fixture.1                      # {a: 1}
+        $fixture.1.a                    # 1
+        $fixture.2                      # {b: [2, [[c, d]; [3, 4]]]}
+        $fixture.2.b                    # [2, [[c, d]; [3, 4]]]
+        $fixture.2.b.0                  # 2
+        $fixture.2.b.1                  #  [c, d]; [3, 4]]
+        $fixture.2.b.1.0                # {c: 3, d: 4}
+        $fixture.2.b.1.0.c              # 3
+        $fixture.2.b.1.0.d              # 4
+    ]
+}