//! Tests of sourcing an already parsed program.

#![cfg(test)]
#![allow(clippy::panic_in_result_fn)]

use anyhow::Result;
use brush_builtins::{BuiltinSet, ShellBuilderExt as _};

async fn new_shell() -> Result<brush_core::Shell> {
    Ok(brush_core::Shell::builder()
        .default_builtins(BuiltinSet::BashMode)
        .build()
        .await?)
}

#[tokio::test]
async fn a_parsed_program_is_sourced_as_a_script() -> Result<()> {
    let mut shell = new_shell().await?;
    let params = shell.default_exec_params();
    let source_info = brush_core::SourceInfo::from(std::path::PathBuf::from("lib.sh"));
    let program = shell.parse_string("seen+=\"$1 \"; return 3; seen+=late")?;

    // Each run gets its own positional parameters, and `return` ends the script, not
    // its caller, with its status.
    for arg in ["a", "b"] {
        let result = shell
            .source_program(&program, &source_info, std::iter::once(arg), &params)
            .await?;
        assert_eq!(u8::from(result.exit_code), 3);
        assert!(!result.is_return_or_exit());
    }
    let result = shell
        .run_string("[[ $seen == 'a b ' ]]", &source_info, &params)
        .await?;
    assert_eq!(u8::from(result.exit_code), 0);
    Ok(())
}

#[tokio::test]
async fn a_sourced_program_runs_in_its_own_script_frame() -> Result<()> {
    let mut shell = new_shell().await?;
    let params = shell.default_exec_params();
    let source_info = brush_core::SourceInfo::from(std::path::PathBuf::from("lib.sh"));
    let program = shell.parse_string("src=${BASH_SOURCE[0]}")?;

    let result = shell
        .source_program(
            &program,
            &source_info,
            std::iter::empty::<String>(),
            &params,
        )
        .await?;
    assert_eq!(u8::from(result.exit_code), 0);
    let result = shell
        .run_string("[[ $src == lib.sh ]]", &source_info, &params)
        .await?;
    assert_eq!(u8::from(result.exit_code), 0);
    Ok(())
}

#[tokio::test]
async fn exit_in_a_sourced_program_still_exits() -> Result<()> {
    let mut shell = new_shell().await?;
    let params = shell.default_exec_params();
    let source_info = brush_core::SourceInfo::from(std::path::PathBuf::from("lib.sh"));
    let program = shell.parse_string("exit 4; echo late")?;

    // Only a `return` ends at the script's boundary; an `exit` goes on to end the shell.
    let result = shell
        .source_program(
            &program,
            &source_info,
            std::iter::empty::<String>(),
            &params,
        )
        .await?;
    assert_eq!(u8::from(result.exit_code), 4);
    assert!(result.is_exit());
    Ok(())
}