working for comparing filepath to string (#2906)

* working for comparing filepath to string

* added tests

crates/nu-engine/tests/evaluate/mod.rs

@@ -0,0 +1 @@
+mod operator;

crates/nu-engine/tests/evaluate/operator.rs

@@ -0,0 +1,38 @@
+use nu_test_support::fs::Stub::EmptyFile;
+use nu_test_support::playground::Playground;
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn filter_ls_by_in_array() {
+    Playground::setup("filter_ls_by_1", |dirs, sandbox| {
+        sandbox.with_files(vec![
+            EmptyFile("jean-luc.cap"),
+            EmptyFile("riker.cmdr"),
+            EmptyFile("data.ltcmdr"),
+            EmptyFile("troi.ltcmdr"),
+            EmptyFile("worf.lt"),
+            EmptyFile("geordi.lt"),
+        ]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                ls | where name in ['data.ltcmdr', 'riker.cmdr'] | get name | to json
+            "#
+        ));
+
+        assert_eq!(actual.out, "[\"data.ltcmdr\",\"riker.cmdr\"]");
+    })
+}
+
+#[test]
+fn filter_json_with_in_array() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo '[{"name": "foo", "size": 3}, {"name": "foo", "size": 2}, {"name": "bar", "size": 4}]' | from json | where size in [2] | get name
+        "#
+    ));
+
+    assert_eq!(actual.out, "foo");
+}

crates/nu-engine/tests/main.rs

@@ -0,0 +1,3 @@
+extern crate nu_test_support;
+
+mod evaluate;