nushell/crates/nu-command/tests/commands/generate.rs
Darren Schroeder adb99938f7
rename unfold to generate (#10770)
# Description

This PR renames the `unfold` command to `generate`.
closes #10760

# User-Facing Changes
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2023-10-19 09:30:34 -05:00

104 lines
2.1 KiB
Rust

use nu_test_support::{nu, pipeline};
#[test]
fn generate_no_next_break() {
let actual = nu!(
"generate 1 {|x| if $x == 3 { {out: $x}} else { {out: $x, next: ($x + 1)} }} | to nuon"
);
assert_eq!(actual.out, "[1, 2, 3]");
}
#[test]
fn generate_null_break() {
let actual = nu!("generate 1 {|x| if $x <= 3 { {out: $x, next: ($x + 1)} }} | to nuon");
assert_eq!(actual.out, "[1, 2, 3]");
}
#[test]
fn generate_allows_empty_output() {
let actual = nu!(pipeline(
r#"
generate 0 {|x|
if $x == 1 {
{next: ($x + 1)}
} else if $x < 3 {
{out: $x, next: ($x + 1)}
}
} | to nuon
"#
));
assert_eq!(actual.out, "[0, 2]");
}
#[test]
fn generate_allows_no_output() {
let actual = nu!(pipeline(
r#"
generate 0 {|x|
if $x < 3 {
{next: ($x + 1)}
}
} | to nuon
"#
));
assert_eq!(actual.out, "[]");
}
#[test]
fn generate_allows_null_state() {
let actual = nu!(pipeline(
r#"
generate 0 {|x|
if $x == null {
{out: "done"}
} else if $x < 1 {
{out: "going", next: ($x + 1)}
} else {
{out: "stopping", next: null}
}
} | to nuon
"#
));
assert_eq!(actual.out, "[going, stopping, done]");
}
#[test]
fn generate_allows_null_output() {
let actual = nu!(pipeline(
r#"
generate 0 {|x|
if $x == 3 {
{out: "done"}
} else {
{out: null, next: ($x + 1)}
}
} | to nuon
"#
));
assert_eq!(actual.out, "[null, null, null, done]");
}
#[test]
fn generate_disallows_extra_keys() {
let actual = nu!("generate 0 {|x| {foo: bar, out: $x}}");
assert!(actual.err.contains("Invalid block return"));
}
#[test]
fn generate_disallows_list() {
let actual = nu!("generate 0 {|x| [$x, ($x + 1)]}");
assert!(actual.err.contains("Invalid block return"));
}
#[test]
fn generate_disallows_primitive() {
let actual = nu!("generate 0 {|x| 1}");
assert!(actual.err.contains("Invalid block return"));
}