nushell/crates/nu-command/tests/commands/let_.rs

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use nu_test_support::{nu, pipeline};
#[test]
fn let_parse_error() {
let actual = nu!(
cwd: ".", pipeline(
r#"
let in = 3
"#
));
assert!(actual
.err
.contains("'in' is the name of a builtin Nushell variable"));
}
#[test]
fn let_doesnt_mutate() {
let actual = nu!(
cwd: ".", pipeline(
r#"
let i = 3; $i = 4
"#
));
assert!(actual.err.contains("immutable"));
}
#[test]
fn let_with_external_failed() {
let actual = nu!(
cwd: ".",
pipeline(r#"let x = nu --testbin outcome_err "aa"; echo fail"#)
);
assert!(!actual.out.contains("fail"));
}