Math#media - ability to compute median value.

crates/nu-cli/tests/commands/math/average.rs

@@ -0,0 +1,26 @@
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn can_average_numbers() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+             open sgml_description.json
+             | get glossary.GlossDiv.GlossList.GlossEntry.Sections
+             | math average
+             | echo $it
+         "#
+    ));
+
+    assert_eq!(actual.out, "101.5")
+}
+
+#[test]
+fn can_average_bytes() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats",
+        "ls | sort-by name | skip 1 | first 2 | get size | math average | format \"{$it}\" | echo $it"
+    );
+
+    assert_eq!(actual.out, "1.6 KB");
+}

crates/nu-cli/tests/commands/math/median.rs

@@ -0,0 +1,29 @@
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn median_numbers_with_even_rows() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+             echo [10 6 19 21 4]
+             | math median
+             | echo $it
+         "#
+    ));
+
+    assert_eq!(actual.out, "10")
+}
+
+#[test]
+fn median_numbers_with_odd_rows() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+             echo [3 8 9 12 12 15]
+             | math median
+             | echo $it
+         "#
+    ));
+
+    assert_eq!(actual.out, "10.5")
+}

crates/nu-cli/tests/commands/math/mod.rs

@@ -0,0 +1,184 @@
+mod average;
+mod median;
+
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn one_arg() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1
+        "#
+    ));
+
+    assert_eq!(actual.out, "1");
+}
+
+#[test]
+fn add() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1 + 1
+        "#
+    ));
+
+    assert_eq!(actual.out, "2");
+}
+
+#[test]
+fn add_compount() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1 + 2 + 2
+        "#
+    ));
+
+    assert_eq!(actual.out, "5");
+}
+
+#[test]
+fn precedence_of_operators() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1 + 2 * 2
+        "#
+    ));
+
+    assert_eq!(actual.out, "5");
+}
+
+#[test]
+fn precedence_of_operators2() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1 + 2 * 2 + 1
+        "#
+    ));
+
+    assert_eq!(actual.out, "6");
+}
+
+#[test]
+fn division_of_ints() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 4 / 2
+        "#
+    ));
+
+    assert_eq!(actual.out, "2");
+}
+
+#[test]
+fn division_of_ints2() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1 / 4
+        "#
+    ));
+
+    assert_eq!(actual.out, "0.25");
+}
+
+#[test]
+fn proper_precedence_history() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 2 / 2 / 2 + 1
+        "#
+    ));
+
+    assert_eq!(actual.out, "1.5");
+}
+
+#[test]
+fn parens_precedence() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 4 * (6 - 3)
+        "#
+    ));
+
+    assert_eq!(actual.out, "12");
+}
+
+#[test]
+fn duration_math() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 1w + 1d
+        "#
+    ));
+
+    assert_eq!(actual.out, "8:00:00:00");
+}
+
+#[test]
+fn it_math() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            echo 1020 | = $it + 10
+        "#
+    ));
+
+    assert_eq!(actual.out, "1030");
+}
+
+#[test]
+fn compound_comparison() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 4 > 3 && 2 > 1
+        "#
+    ));
+
+    assert_eq!(actual.out, "true");
+}
+
+#[test]
+fn compound_comparison2() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            = 4 < 3 || 2 > 1
+        "#
+    ));
+
+    assert_eq!(actual.out, "true");
+}
+
+#[test]
+fn compound_where() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            echo '[{"a": 1, "b": 1}, {"a": 2, "b": 1}, {"a": 2, "b": 2}]' | from json | where a == 2 && b == 1 | to json
+        "#
+    ));
+
+    assert_eq!(actual.out, r#"{"a":2,"b":1}"#);
+}
+
+#[test]
+fn compound_where_paren() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+            echo '[{"a": 1, "b": 1}, {"a": 2, "b": 1}, {"a": 2, "b": 2}]' | from json | where (a == 2 && b == 1) || b == 2 | to json
+        "#
+    ));
+
+    assert_eq!(actual.out, r#"[{"a":2,"b":1},{"a":2,"b":2}]"#);
+}