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227d1d9508
<!-- if this PR closes one or more issues, you can automatically link the PR with them by using one of the [*linking keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword), e.g. - this PR should close #xxxx - fixes #xxxx you can also mention related issues, PRs or discussions! --> # Description - fixes #9567 I have fixed everything mentioned in the issue, and made their help messages more similar. <!-- Thank you for improving Nushell. Please, check our [contributing guide](../CONTRIBUTING.md) and talk to the core team before making major changes. Description of your pull request goes here. **Provide examples and/or screenshots** if your changes affect the user experience. --> # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> - Previously, `last` on binary data returned an integer. Now it returns a binary - Now, `[] | last` and `[] | first` are both errors. - Now, `ls | table | first` and `ls | table | last` are both errors.
134 lines
2.8 KiB
Rust
134 lines
2.8 KiB
Rust
use nu_test_support::fs::Stub::EmptyFile;
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use nu_test_support::playground::Playground;
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use nu_test_support::{nu, pipeline};
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#[test]
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fn gets_first_rows_by_amount() {
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Playground::setup("first_test_1", |dirs, sandbox| {
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sandbox.with_files(vec![
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EmptyFile("los.txt"),
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EmptyFile("tres.txt"),
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EmptyFile("amigos.txt"),
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EmptyFile("arepas.clu"),
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]);
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let actual = nu!(
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cwd: dirs.test(), pipeline(
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r#"
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ls
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| first 3
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| length
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"#
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));
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assert_eq!(actual.out, "3");
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})
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}
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#[test]
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fn gets_all_rows_if_amount_higher_than_all_rows() {
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Playground::setup("first_test_2", |dirs, sandbox| {
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sandbox.with_files(vec![
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EmptyFile("los.txt"),
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EmptyFile("tres.txt"),
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EmptyFile("amigos.txt"),
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EmptyFile("arepas.clu"),
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]);
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let actual = nu!(
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cwd: dirs.test(), pipeline(
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r#"
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ls
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| first 99
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| length
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"#
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));
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assert_eq!(actual.out, "4");
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})
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}
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#[test]
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fn gets_first_row_when_no_amount_given() {
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Playground::setup("first_test_3", |dirs, sandbox| {
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sandbox.with_files(vec![EmptyFile("caballeros.txt"), EmptyFile("arepas.clu")]);
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let actual = nu!(
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cwd: dirs.test(), pipeline(
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r#"
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ls
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| first
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| length
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"#
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));
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assert_eq!(actual.out, "1");
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})
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}
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#[test]
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fn gets_first_row_as_list_when_amount_given() {
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let actual = nu!(pipeline(
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r#"
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[1, 2, 3]
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| first 1
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| describe
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"#
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));
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assert_eq!(actual.out, "list<int> (stream)");
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}
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#[test]
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fn gets_first_bytes() {
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let actual = nu!(pipeline(
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r#"
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(0x[aa bb cc] | first 2) == 0x[aa bb]
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"#
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));
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn gets_first_byte() {
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let actual = nu!(pipeline(
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r#"
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0x[aa bb cc] | first
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"#
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));
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assert_eq!(actual.out, "170");
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}
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#[test]
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// covers a situation where `first` used to behave strangely on list<binary> input
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fn works_with_binary_list() {
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let actual = nu!("([0x[01 11]] | first) == 0x[01 11]");
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn errors_on_negative_rows() {
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let actual = nu!(pipeline(
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r#"
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[1, 2, 3]
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| first -10
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"#
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));
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assert!(actual.err.contains("use a positive value"));
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}
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#[test]
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fn errors_on_empty_list_when_no_rows_given() {
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let actual = nu!(pipeline(
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r#"
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[]
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| first
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"#
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));
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assert!(actual.err.contains("index too large"));
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}
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