allow str from to convert more things to string (#2977)

* allow str from to convert more things to string

* fixed FileSize so it reports with units configured

* added tests

crates/nu-command/tests/commands/str_/from.rs

@@ -0,0 +1,158 @@
+use nu_test_support::playground::{Dirs, Playground};
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn from_range() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 1..5 | str from | to json
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "[\"1\",\"2\",\"3\",\"4\",\"5\"]");
+}
+
+#[test]
+fn from_number() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 5 | str from
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "5");
+}
+
+#[test]
+fn from_decimal() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 1.5 | str from
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "1.5");
+}
+
+#[test]
+fn from_boolean() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo $true | str from
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "true");
+}
+
+#[test]
+fn from_string() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo "one" | str from
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "one");
+}
+
+#[test]
+fn from_filename() {
+    Playground::setup("from_filename", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContentToBeTrimmed(
+            "sample.toml",
+            r#"
+                [dependency]
+                name = "nu"
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(),
+            "ls sample.toml | get name | str from"
+        );
+
+        assert_eq!(actual.out, "sample.toml");
+    })
+}
+
+#[test]
+fn from_filesize() {
+    Playground::setup("from_filesize", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContentToBeTrimmed(
+            "sample.toml",
+            r#"
+                [dependency]
+                name = "nu"
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(),
+            "ls sample.toml | get size | str from"
+        );
+
+        assert_eq!(actual.out, "25 B");
+    })
+}
+
+#[test]
+fn from_decimal_correct_trailing_zeros() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        = 1.23000 | str from -d 3
+        "#
+    ));
+
+    assert!(actual.out.contains("1.230"));
+}
+
+#[test]
+fn from_int_decimal_correct_trailing_zeros() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        = 1.00000 | str from -d 3
+        "#
+    ));
+
+    assert!(actual.out.contains("1.000"));
+}
+
+#[test]
+fn from_int_decimal_trim_trailing_zeros() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        = 1.00000 | str from | format "{$it} flat"
+        "#
+    ));
+
+    assert!(actual.out.contains("1 flat")); // "1" would match "1.0"
+}
+
+#[test]
+fn from_table() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo '[{"name": "foo", "weight": 32.377}, {"name": "bar", "weight": 15.2}]'
+        | from json
+        | str from weight -d 2
+        "#
+    ));
+
+    assert!(actual.out.contains("32.38"));
+    assert!(actual.out.contains("15.20"));
+}

crates/nu-command/tests/commands/str_/mod.rs

@@ -128,7 +128,7 @@ fn converts_to_int() {
             | rename number
             | where number == 1
             | get number
-            
+
         "#
     ));
 
@@ -343,57 +343,6 @@ fn substrings_the_input_and_treats_end_index_as_length_if_blank_end_index_given(
     })
 }
 
-#[test]
-fn from_decimal_correct_trailing_zeros() {
-    let actual = nu!(
-        cwd: ".", pipeline(
-        r#"
-        = 1.23000 | str from -d 3
-        "#
-    ));
-
-    assert!(actual.out.contains("1.230"));
-}
-
-#[test]
-fn from_int_decimal_correct_trailing_zeros() {
-    let actual = nu!(
-        cwd: ".", pipeline(
-        r#"
-        = 1.00000 | str from -d 3
-        "#
-    ));
-
-    assert!(actual.out.contains("1.000"));
-}
-
-#[test]
-fn from_int_decimal_trim_trailing_zeros() {
-    let actual = nu!(
-        cwd: ".", pipeline(
-        r#"
-        = 1.00000 | str from | format "{$it} flat"
-        "#
-    ));
-
-    assert!(actual.out.contains("1 flat")); // "1" would match "1.0"
-}
-
-#[test]
-fn from_table() {
-    let actual = nu!(
-        cwd: ".", pipeline(
-        r#"
-        echo '[{"name": "foo", "weight": 32.377}, {"name": "bar", "weight": 15.2}]'
-        | from json
-        | str from weight -d 2
-        "#
-    ));
-
-    assert!(actual.out.contains("32.38"));
-    assert!(actual.out.contains("15.20"));
-}
-
 #[test]
 fn str_reverse() {
     let actual = nu!(