add from ndnuon and to ndnuon to stdlib

crates/nu-std/std/formats/mod.nu

@@ -28,3 +28,13 @@ export def "to ndjson" []: any -> string {
 export def "to jsonl" []: any -> string {
     each { to json --raw } | to text
 }
+
+# Convert from NDNUON, i.e. newline-delimited NUON, to structured
+def "from ndnuon" []: [string -> any] {
+    lines | each { from nuon }
+}
+
+# Convert structured data to NDNUON, i.e. newline-delimited NUON
+def "to ndnuon" []: [any -> string] {
+    each { to nuon --raw } | to text
+}

crates/nu-std/tests/test_formats.nu

@@ -84,3 +84,22 @@ def to_jsonl_single_object [] {
   let expect = "{\"a\":1}"
   assert equal $result $expect "could not convert to JSONL"
 }
+
+#[test]
+def from_ndnuon_multiple_objects [] {
+  let result = test_data_multiline | formats from ndnuon
+  let expect = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_single_object [] {
+  let result = '{a: 1}' | formats from ndnuon
+  let expect = [{a:1}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_invalid_object [] {
+  assert error { '{"a":1' | formats from ndnuon }
+}

crates/nu-std/tests/test_std_formats.nu

@@ -84,3 +84,22 @@ def to_jsonl_single_object [] {
   let expect = "{\"a\":1}"
   assert equal $result $expect "could not convert to JSONL"
 }
+
+#[test]
+def from_ndnuon_multiple_objects [] {
+  let result = test_data_multiline | formats from ndnuon
+  let expect = [{a:1},{a:2},{a:3},{a:4},{a:5},{a:6}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_single_object [] {
+  let result = '{a: 1}' | formats from ndnuon
+  let expect = [{a:1}]
+  assert equal $result $expect "could not convert from NDNUON"
+}
+
+#[test]
+def from_ndnuon_invalid_object [] {
+  assert error { '{"a":1' | formats from ndnuon }
+}