Merge nucleic/sleek-thistle-egret-fyej into dev

brush-shell/tests/version_tests.rs

@@ -0,0 +1,48 @@
+//! Integration tests for brush shell
+//!
+//! Most CLI tests have been moved to YAML format in tests/cases/brush/cli.yaml.
+//! This file contains tests that require dynamic value comparison.
+
+// For now, only compile this for Unix-like platforms (Linux, macOS).
+#![cfg(unix)]
+#![cfg(test)]
+#![allow(clippy::panic_in_result_fn)]
+
+use anyhow::Context;
+
+#[test]
+fn get_version_variables() -> anyhow::Result<()> {
+    let shell_path = assert_cmd::cargo::cargo_bin!("brush");
+    let brush_ver_str = get_variable(shell_path, /* shell_is_brush */ true, "BRUSH_VERSION")?;
+    let bash_ver_str = get_variable(shell_path, /* shell_is_brush */ false, "BASH_VERSION")?;
+
+    assert_eq!(brush_ver_str, env!("CARGO_PKG_VERSION"));
+    assert_ne!(
+        brush_ver_str, bash_ver_str,
+        "Should differ for scripting use-case"
+    );
+
+    Ok(())
+}
+
+fn get_variable(
+    shell_path: &std::path::Path,
+    shell_is_brush: bool,
+    var: &str,
+) -> anyhow::Result<String> {
+    let mut cmd = std::process::Command::new(shell_path);
+
+    if shell_is_brush {
+        cmd.arg("--no-config");
+    }
+
+    let output = cmd
+        .arg("--norc")
+        .arg("--noprofile")
+        .arg("-c")
+        .arg(format!("echo -n ${{{var}}}"))
+        .output()
+        .with_context(|| format!("failed to retrieve {var}"))?
+        .stdout;
+    Ok(String::from_utf8(output)?)
+}