MercuryToolbox/crates/zon/tests/zon_cli.rs

//! Integration tests for the `zon` command.

use std::path::PathBuf;

use assert_cmd::Command;
use predicates::prelude::*;

fn cargo_command() -> Command {
    Command::cargo_bin("zon").expect("binary")
}

fn fixture(path: &str) -> PathBuf {
    let fixture = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
        .join("..")
        .join("..")
        .join("fixtures")
        .join(path);
    assert!(
        fixture.exists(),
        "missing fixture `{path}` at {}",
        fixture.display()
    );
    fixture
}

#[test]
fn json_file_encodes_to_v1_zon_object() {
    cargo_command()
        .arg(fixture("json-family/zon/person.json"))
        .assert()
        .success()
        .stdout(predicate::str::contains("name:\"Ada\"\n"))
        .stdout(predicate::str::contains("active:true\n"))
        .stdout(predicate::str::contains("score:42\n"))
        .stdout(predicate::str::contains("tags:[\"math\",\"logic\"]\n"))
        .stdout(predicate::str::contains(
            "profile:{\"city\":\"London\",\"year\":1843}\n",
        ));
}

#[test]
fn zon_file_decodes_to_pretty_json() {
    cargo_command()
        .args(["--from", "zon", "--to", "json"])
        .arg(fixture("json-family/zon/person.zon"))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"name\": \"Ada\""))
        .stdout(predicate::str::contains("\"active\": true"))
        .stdout(predicate::str::contains("\"profile\": {"));
}

#[test]
fn jsonl_stdin_encodes_to_root_table() {
    cargo_command()
        .args(["--from", "json", "--input-format", "jsonl"])
        .write_stdin("{\"name\":\"Ada\",\"score\":10,\"active\":true}\n{\"name\":\"Bob\",\"score\":11,\"active\":false}\n")
        .assert()
        .success()
        .stdout(predicate::str::contains("@(2):name,score,active\n"))
        .stdout(predicate::str::contains("Ada,10,true\n"))
        .stdout(predicate::str::contains("Bob,11,false\n"));
}

#[test]
fn root_table_decodes_to_json_array() {
    cargo_command()
        .args(["--from", "zon", "--to", "json"])
        .arg(fixture("json-family/zon/records.zon"))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"name\": \"Ada\""))
        .stdout(predicate::str::contains("\"score\": 11"))
        .stdout(predicate::str::contains("\"active\": false"));
}

#[test]
fn explicit_path_wins_over_piped_stdin_noise() {
    cargo_command()
        .arg(fixture("json-family/zon/person.json"))
        .write_stdin("not zon or json from upstream pipeline")
        .assert()
        .success()
        .stdout(predicate::str::contains("name:\"Ada\""));
}

#[test]
fn accepts_stdin_path_stream_in_lines_mode() {
    cargo_command()
        .args(["--input-format", "lines"])
        .write_stdin(format!(
            "{}\n",
            fixture("json-family/zon/person.json").display()
        ))
        .assert()
        .success()
        .stdout(predicate::str::contains("name:\"Ada\""));
}

#[test]
fn lines_mode_accepts_path_with_spaces() {
    let temp = tempfile::tempdir().expect("tempdir");
    let path = temp.path().join("person with spaces.json");
    std::fs::write(&path, "{\"name\":\"Ada\",\"active\":true}\n").expect("spaced path fixture");

    cargo_command()
        .args(["--input-format", "lines"])
        .write_stdin(format!("{}\n", path.display()))
        .assert()
        .success()
        .stdout(predicate::str::contains("name:\"Ada\""));
}

#[test]
fn json_wrapper_reports_target_format_and_document_count() {
    cargo_command()
        .args(["--json", "--from", "json", "--input-format", "jsonl"])
        .arg(fixture("json-family/zon/records.jsonl"))
        .assert()
        .success()
        .stdout(predicate::str::contains("\"format\":\"zon\""))
        .stdout(predicate::str::contains("\"documents\":2"))
        .stdout(predicate::str::contains("@(2):name,score,active"));
}

#[test]
fn toon_wrapper_reports_target_format_and_document_count() {
    cargo_command()
        .args(["--toon", "--from", "json", "--input-format", "jsonl"])
        .arg(fixture("json-family/zon/records.jsonl"))
        .assert()
        .success()
        .stdout(predicate::str::contains("format: zon"))
        .stdout(predicate::str::contains("documents: 2"))
        .stdout(predicate::str::contains("@(2):name,score,active"));
}

#[test]
fn invalid_zon_reports_line_and_unsupported_nested_blocks() {
    cargo_command()
        .args(["--from", "zon", "--to", "json"])
        .arg(fixture("json-family/zon/invalid-nested.zon"))
        .assert()
        .failure()
        .stderr(predicate::str::contains("line 2"))
        .stderr(predicate::str::contains(
            "nested block values are not supported in zon v1",
        ));
}

#[test]
fn empty_stdin_without_path_exits_with_usage_code_2() {
    cargo_command()
        .write_stdin("")
        .assert()
        .code(2)
        .stderr(predicate::str::contains("input is empty"));
}

#[test]
fn invalid_stdin_path_stream_keeps_usage_code_2() {
    cargo_command()
        .args(["--input-format", "lines"])
        .write_stdin(".\\definitely-missing-zon-input.json\n")
        .assert()
        .code(2)
        .stderr(predicate::str::contains("stdin path line 1 does not exist"));
}

#[test]
fn help_names_zero_overhead_notation_and_examples() {
    cargo_command()
        .arg("--help")
        .assert()
        .success()
        .stdout(predicate::str::contains("Zero Overhead Notation"))
        .stdout(predicate::str::contains("not Zig Object Notation"))
        .stdout(predicate::str::contains(
            "bat --style=plain --paging=never .\\fixtures\\json-family\\zon\\records.jsonl | zon --input-format jsonl",
        ));
}