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https://github.com/nushell/nushell.git
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fb72da0e82
# Description
this pr condenses `MutBuiltinVar`, `LetBuiltinVar` and `ConstBuiltinVar`
into one error:
```nu
Error: nu::parser::name_is_builtin_var
× `in` used as variable name.
╭─[entry #69:1:1]
1 │ let in = 420
· ─┬
· ╰── already a builtin variable
╰────
help: 'in' is the name of a builtin Nushell variable and cannot be used
as a variable name
```
it also fixes this case which was previously not handled
```nu
let $nu = 420 # this variable would have been 'lost'
```
38 lines
676 B
Rust
38 lines
676 B
Rust
use nu_test_support::{nu, pipeline};
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#[test]
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fn let_name_builtin_var() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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let in = 3
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"#
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));
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assert!(actual
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.err
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.contains("'in' is the name of a builtin Nushell variable"));
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}
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#[test]
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fn let_doesnt_mutate() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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let i = 3; $i = 4
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"#
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));
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assert!(actual.err.contains("immutable"));
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}
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#[test]
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fn let_with_external_failed() {
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let actual = nu!(
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cwd: ".",
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pipeline(r#"let x = nu --testbin outcome_err "aa"; echo fail"#)
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);
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assert!(!actual.out.contains("fail"));
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}
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