Command tests (#922)

* WIP command tests

* Finish marking todo tests

* update

* update

* Windows cd test ignoring

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

@@ -0,0 +1,122 @@
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn base64_defaults_to_encoding_with_standard_character_type() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 'username:password' | hash base64 
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "dXNlcm5hbWU6cGFzc3dvcmQ=");
+}
+
+#[test]
+fn base64_encode_characterset_binhex() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 'username:password' | hash base64 --character_set binhex --encode
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "F@0NEPjJD97kE\'&bEhFZEP3");
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn error_when_invalid_character_set_given() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 'username:password' | hash base64 --character_set 'this is invalid' --encode
+        "#
+        )
+    );
+
+    assert!(actual
+        .err
+        .contains("this is invalid is not a valid character-set"));
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn base64_decode_characterset_binhex() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo "F@0NEPjJD97kE'&bEhFZEP3" | hash base64 --character_set binhex --decode
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "username:password");
+}
+
+#[test]
+fn error_invalid_decode_value() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo "this should not be a valid encoded value" | hash base64 --character_set url-safe --decode
+        "#
+        )
+    );
+
+    assert!(actual
+        .err
+        .contains("invalid base64 input for character set url-safe"));
+}
+
+#[test]
+fn error_use_both_flags() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        echo 'username:password' | hash base64 --encode --decode
+        "#
+        )
+    );
+
+    assert!(actual
+        .err
+        .contains("only one of --decode and --encode flags can be used"));
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn md5_works_with_file() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+        open sample.db | hash md5 
+        "#
+        )
+    );
+
+    assert_eq!(actual.out, "4de97601d232c427977ef11db396c951");
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn sha256_works_with_file() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats", pipeline(
+        r#"
+        open sample.db | hash sha256
+        "#
+        )
+    );
+
+    assert_eq!(
+        actual.out,
+        "2f5050e7eea415c1f3d80b5d93355efd15043ec9157a2bb167a9e73f2ae651f2"
+    );
+}