Nucleic: Build Script Error Investigation

nash/tests/stdin.rs

@@ -0,0 +1,74 @@
+//! End-to-end tests for scripts supplied through `nash -s` on standard input.
+
+use std::io::Write;
+use std::process::{Command, Output, Stdio};
+
+fn run_stdin(script: &str) -> Output {
+    let mut child = Command::new(env!("CARGO_BIN_EXE_nash"))
+        .args(["--noprofile", "--norc", "-s"])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .expect("spawn nash");
+
+    child
+        .stdin
+        .take()
+        .expect("piped stdin")
+        .write_all(script.as_bytes())
+        .expect("write script");
+
+    child.wait_with_output().expect("wait for nash")
+}
+
+#[test]
+fn multiline_compound_commands_execute_from_stdin() {
+    let output = run_stdin(
+        r#"greet() {
+    case "$1" in
+        world)
+            cat <<'EOF'
+hello world
+EOF
+            ;;
+        *)
+            echo unexpected
+            ;;
+    esac
+}
+greet world
+"#,
+    );
+
+    assert!(
+        output.status.success(),
+        "nash failed: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+    assert_eq!(String::from_utf8_lossy(&output.stdout), "hello world\n");
+}
+
+#[test]
+fn commands_can_consume_following_stdin() {
+    let output = run_stdin("read value\npayload\necho got:$value\n");
+
+    assert!(
+        output.status.success(),
+        "nash failed: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+    assert_eq!(String::from_utf8_lossy(&output.stdout), "got:payload\n");
+}
+
+#[test]
+fn incomplete_stdin_command_reports_a_parse_error() {
+    let output = run_stdin("if true; then\n    echo never\n");
+
+    assert!(!output.status.success());
+    assert!(
+        String::from_utf8_lossy(&output.stderr).contains("syntax error at end of input"),
+        "unexpected stderr: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+}