This commit is the continuing phase of extracting functionality to subcrates. We extract test helpers and begin to change Nu shell's test organization along with it.

tests/commands/compact.rs

@@ -0,0 +1,52 @@
+use test_support::fs::Stub::FileWithContentToBeTrimmed;
+use test_support::playground::Playground;
+use test_support::{nu, pipeline};
+
+#[test]
+fn discards_rows_where_given_column_is_empty() {
+    Playground::setup("compact_test_1", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContentToBeTrimmed(
+            "los_tres_amigos.json",
+            r#"
+                {
+                    "amigos": [
+                        {"name":   "Yehuda", "rusty_luck": 1},
+                        {"name": "Jonathan", "rusty_luck": 1},
+                        {"name":   "Andres", "rusty_luck": 1},
+                        {"name":"GorbyPuff"}
+                    ]
+                }
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open los_tres_amigos.json
+                | get amigos
+                | compact rusty_luck
+                | count
+                | echo $it
+            "#
+        ));
+
+        assert_eq!(actual, "3");
+    });
+}
+#[test]
+fn discards_empty_rows_by_default() {
+    Playground::setup("compact_test_2", |dirs, _| {
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                echo "[1,2,3,14,null]"
+                | from-json
+                | compact
+                | count
+                | echo $it
+            "#
+        ));
+
+        assert_eq!(actual, "4");
+    });
+}