Extract out xpath to a plugin. (#2661)

crates/nu-cli/tests/commands/xpath.rs

@@ -1,41 +0,0 @@
-use nu_test_support::fs::Stub::FileWithContentToBeTrimmed;
-use nu_test_support::playground::Playground;
-use nu_test_support::{nu, pipeline};
-
-#[test]
-fn position_function_in_predicate() {
-    let actual = nu!(
-        cwd: ".", pipeline(
-        r#"
-        echo "<?xml version="1.0" encoding="UTF-8"?><a><b/><b/></a>" | from xml | to xml | xpath "count(//a/*[position() = 2])"
-        "#
-    ));
-
-    assert_eq!(actual.out, "1.0000");
-}
-
-#[test]
-fn functions_implicitly_coerce_argument_types() {
-    let actual = nu!(
-        cwd: ".", pipeline(
-        r#"
-        echo "<?xml version="1.0" encoding="UTF-8"?><a>true</a>" | from xml | to xml | xpath "count(//*[contains(., true)])"
-        "#
-    ));
-
-    assert_eq!(actual.out, "1.0000");
-}
-
-#[test]
-fn find_guid_permilink_is_true() {
-    let actual = nu!(
-        cwd: "tests/fixtures/formats", pipeline(
-        r#"
-            open jonathan.xml
-            | to xml
-            | xpath '//guid/@isPermaLink'
-        "#
-    ));
-
-    assert_eq!(actual.out, "true");
-}