forked from extern/nushell
Improve empty pipelines (#7383)
# Description This fix changes pipelines to allow them to actually be empty. Mapping over empty pipelines gives empty pipelines. Empty pipelines immediately return `None` when iterated. This removes a some of where `Span::new(0, 0)` was coming from, though there are other cases where we still use it. # User-Facing Changes None # Tests + Formatting Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # After Submitting If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date.
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@ -43,7 +43,7 @@ fn sets_the_column_from_a_block_full_stream_output() {
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let actual = nu!(
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cwd: "tests/fixtures/formats", pipeline(
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r#"
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wrap content
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{content: null}
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| upsert content { open --raw cargo_sample.toml | lines | first 5 }
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| get content.1
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| str contains "nu"
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@ -58,7 +58,7 @@ fn sets_the_column_from_a_subexpression() {
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let actual = nu!(
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cwd: "tests/fixtures/formats", pipeline(
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r#"
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wrap content
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{content: null}
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| upsert content (open --raw cargo_sample.toml | lines | first 5)
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| get content.1
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| str contains "nu"
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