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https://github.com/nushell/nushell.git
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e879d4ecaf
# Description Does some misc changes to `ListStream`: - Moves it into its own module/file separate from `RawStream`. - `ListStream`s now have an associated `Span`. - This required changes to `ListStreamInfo` in `nu-plugin`. Note sure if this is a breaking change for the plugin protocol. - Hides the internals of `ListStream` but also adds a few more methods. - This includes two functions to more easily alter a stream (these take a `ListStream` and return a `ListStream` instead of having to go through the whole `into_pipeline_data(..)` route). - `map`: takes a `FnMut(Value) -> Value` - `modify`: takes a function to modify the inner stream.
107 lines
3.0 KiB
Rust
107 lines
3.0 KiB
Rust
//! Test support for [Nushell](https://nushell.sh) plugins.
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//!
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//! # Example
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//!
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//! ```rust
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//! use std::sync::Arc;
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//!
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//! use nu_plugin::*;
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//! use nu_plugin_test_support::PluginTest;
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//! use nu_protocol::{
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//! Example, IntoInterruptiblePipelineData, LabeledError, PipelineData, ShellError, Signature,
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//! Span, Type, Value,
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//! };
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//!
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//! struct LowercasePlugin;
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//! struct Lowercase;
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//!
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//! impl PluginCommand for Lowercase {
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//! type Plugin = LowercasePlugin;
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//!
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//! fn name(&self) -> &str {
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//! "lowercase"
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//! }
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//!
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//! fn usage(&self) -> &str {
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//! "Convert each string in a stream to lowercase"
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//! }
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//!
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//! fn signature(&self) -> Signature {
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//! Signature::build(self.name()).input_output_type(
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//! Type::List(Type::String.into()),
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//! Type::List(Type::String.into()),
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//! )
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//! }
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//!
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//! fn examples(&self) -> Vec<Example> {
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//! vec![Example {
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//! example: r#"[Hello wORLD] | lowercase"#,
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//! description: "Lowercase a list of strings",
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//! result: Some(Value::test_list(vec![
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//! Value::test_string("hello"),
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//! Value::test_string("world"),
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//! ])),
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//! }]
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//! }
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//!
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//! fn run(
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//! &self,
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//! _plugin: &LowercasePlugin,
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//! _engine: &EngineInterface,
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//! call: &EvaluatedCall,
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//! input: PipelineData,
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//! ) -> Result<PipelineData, LabeledError> {
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//! let span = call.head;
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//! Ok(input.map(
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//! move |value| {
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//! value
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//! .as_str()
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//! .map(|string| Value::string(string.to_lowercase(), span))
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//! // Errors in a stream should be returned as values.
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//! .unwrap_or_else(|err| Value::error(err, span))
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//! },
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//! None,
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//! )?)
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//! }
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//! }
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//!
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//! impl Plugin for LowercasePlugin {
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//! fn commands(&self) -> Vec<Box<dyn PluginCommand<Plugin=Self>>> {
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//! vec![Box::new(Lowercase)]
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//! }
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//! }
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//!
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//! // #[test]
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//! fn test_examples() -> Result<(), ShellError> {
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//! PluginTest::new("lowercase", LowercasePlugin.into())?
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//! .test_command_examples(&Lowercase)
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//! }
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//!
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//! // #[test]
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//! fn test_lowercase() -> Result<(), ShellError> {
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//! let input = vec![Value::test_string("FooBar")].into_pipeline_data(Span::test_data(), None);
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//! let output = PluginTest::new("lowercase", LowercasePlugin.into())?
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//! .eval_with("lowercase", input)?
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//! .into_value(Span::test_data());
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//!
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//! assert_eq!(
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//! Value::test_list(vec![
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//! Value::test_string("foobar")
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//! ]),
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//! output
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//! );
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//! Ok(())
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//! }
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//! #
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//! # test_examples().unwrap();
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//! # test_lowercase().unwrap();
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//! ```
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mod diff;
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mod fake_persistent_plugin;
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mod fake_register;
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mod plugin_test;
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mod spawn_fake_plugin;
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pub use plugin_test::PluginTest;
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