This is part of on-going work with capabilities when working with

tables and able to work with them for data processing & viewing
purposes. At the moment, certain ways to process said tables we
are able to view a histogram of a given column.

As usage matures, we may find certain core commands that could
be used ergonomically when working with tables on Nu.

tests/commands_test.rs

@@ -31,6 +31,35 @@ fn group_by() {
     })
 }
 
+#[test]
+fn histogram() {
+    Playground::setup("histogram_test_1", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContentToBeTrimmed(
+            "los_tres_caballeros.csv",
+            r#"
+                first_name,last_name,rusty_at
+                Andrés,Robalino,Ecuador
+                Jonathan,Turner,Estados Unidos
+                Yehuda,Katz,Estados Unidos
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), h::pipeline(
+            r#"
+                open los_tres_caballeros.csv
+                | histogram rusty_at countries
+                | where rusty_at == "Ecuador"
+                | get countries
+                | echo $it
+            "#
+        ));
+
+        assert_eq!(actual, "**************************************************");
+        // 50%
+    })
+}
+
 #[test]
 fn group_by_errors_if_unknown_column_name() {
     Playground::setup("group_by_test_2", |dirs, sandbox| {
@@ -56,7 +85,6 @@ fn group_by_errors_if_unknown_column_name() {
     })
 }
 
-#[cfg(data_processing_primitives)]
 #[test]
 fn split_by() {
     Playground::setup("split_by_test_1", |dirs, sandbox| {
@@ -86,7 +114,6 @@ fn split_by() {
     })
 }
 
-#[cfg(data_processing_primitives)]
 #[test]
 fn split_by_errors_if_no_table_given_as_input() {
     Playground::setup("split_by_test_2", |dirs, sandbox| {