use clap::Command;
use serde_json::json;
use serial_test::serial;
use standout::cli::FnHandler;
use standout::cli::{App, ExitStatus, HelpResult, Output, RunErrorKind, SuccessKind};
use standout::EmbeddedTemplates;
use standout::Theme;
use standout_fixtures::downstream;
use standout_test::TestHarness;
const TEMPLATES: &[(&str, &str)] = &[("review", "listed")];
fn configured_help(app: &App, cmd: Command, args: &[&str]) -> String {
match app.get_matches_from(cmd, args, &standout::InputSources::from_process()) {
HelpResult::Help(h) | HelpResult::PagedHelp(h) => h,
other => panic!("expected rendered help, got {other:?}"),
}
}
#[test]
#[serial]
fn the_help_word_renders_themed_help_through_run() {
let fixture = downstream().flat().build();
let result =
TestHarness::new()
.text_output()
.run(fixture.app(), fixture.command(), ["lookma", "help"]);
result.assert_success();
assert_eq!(result.success_kind(), Some(SuccessKind::ClapHelp));
result.assert_stdout_contains("Diff a git range");
result.assert_stdout_contains("USAGE");
}
#[test]
#[serial]
fn downstream_theme_help_preserves_option_cues_through_run() {
let fixture = downstream().build();
let result =
TestHarness::new()
.with_color()
.run(fixture.app(), fixture.command(), ["lookma", "help"]);
result.assert_success();
assert_eq!(result.success_kind(), Some(SuccessKind::ClapHelp));
let output = result.stdout();
let plain = result.stdout_plain();
assert!(
!output.contains("[header?]") && !output.contains("[metavar?]"),
"app output themes must not leak unresolved help tags:\n{output}"
);
assert!(plain.contains("RANGE"), "{plain}");
assert!(plain.contains("--threshold <RATIO>"), "{plain}");
assert!(plain.contains("-c, --color <BOOL>"), "{plain}");
assert!(
plain.contains("--pattern <pattern>"),
"fallback metavars should survive the App run path:\n{plain}"
);
assert!(
plain.contains("default: brief") && plain.contains("possible values: brief, full, none"),
"defaults and enumerated values should survive the App run path:\n{plain}"
);
let staged = plain
.find("--staged")
.expect("rendered help should include --staged");
let threshold = plain
.find("--threshold")
.expect("rendered help should include --threshold");
let staged_block = &plain[staged..threshold];
assert!(
!staged_block.contains('<') && !staged_block.contains("possible values:"),
"presence flags should not advertise bool values:\n{plain}"
);
}
#[test]
#[serial]
fn the_help_flags_render_themed_help_through_run() {
let fixture = downstream().flat().without_help_word().build();
for flag in ["--help", "-h"] {
let result = TestHarness::new().text_output().run(
fixture.app(),
fixture.command(),
["lookma", flag],
);
result.assert_success();
assert_eq!(result.success_kind(), Some(SuccessKind::ClapHelp));
result.assert_stdout_contains("USAGE");
}
}
#[test]
#[serial]
fn the_help_word_renders_a_topic_through_run() {
let fixture = downstream().flat().build();
let result = TestHarness::new().text_output().run(
fixture.app(),
fixture.command(),
["lookma", "help", "ranges"],
);
result.assert_success();
result.assert_stdout_contains("two revisions separated by two dots");
}
#[test]
#[serial]
fn the_help_word_renders_a_subcommands_help_through_run() {
let fixture = downstream().build();
let word = TestHarness::new().text_output().run(
fixture.app(),
fixture.command(),
["lookma", "help", "review"],
);
word.assert_success();
word.assert_stdout_contains("Review a range hunk by hunk");
drop(word);
let flag = TestHarness::new().text_output().run(
fixture.app(),
fixture.command(),
["lookma", "review", "--help"],
);
flag.assert_success();
flag.assert_stdout_contains("Review a range hunk by hunk");
}
#[test]
#[serial]
fn the_help_word_honours_the_output_flag_through_run() {
let fixture = downstream().flat().build();
let tagged = TestHarness::new().run(
fixture.app(),
fixture.command(),
["lookma", "help", "--output", "term-debug"],
);
tagged.assert_success();
tagged.assert_stdout_contains("[header]USAGE[/header]");
drop(tagged);
for mode in ["json", "yaml", "csv", "xml"] {
let result = TestHarness::new().run(
fixture.app(),
fixture.command(),
["lookma", "help", "--output", mode],
);
result.assert_success();
result.assert_stdout_contains("USAGE");
assert!(
!result.stdout().contains("[header]"),
"{mode}: structured modes still print human help:\n{}",
result.stdout()
);
assert!(
!result.stdout().trim_start().starts_with('{'),
"{mode}: must not emit a JSON help document:\n{}",
result.stdout()
);
}
}
#[test]
#[serial]
fn structured_help_on_a_color_tty_still_looks_like_help() {
let fixture = downstream().flat().build();
let result = TestHarness::new().with_color().run(
fixture.app(),
fixture.command(),
["lookma", "help", "--output", "json"],
);
result.assert_success();
result.assert_stdout_contains("USAGE");
assert!(
result.stdout().contains('\u{1b}'),
"help --output=json on a color TTY must still look like help:\n{:?}",
result.stdout()
);
}
#[test]
#[serial]
fn structured_topics_still_print_human_text() {
let fixture = downstream().flat().build();
let list = TestHarness::new().run(
fixture.app(),
fixture.command(),
["lookma", "help", "topics", "--output", "json"],
);
list.assert_success();
list.assert_stdout_contains("Available Topics");
assert!(
!list.stdout().trim_start().starts_with('{'),
"topics --output=json must not emit a JSON document:\n{}",
list.stdout()
);
drop(list);
let topic = TestHarness::new().run(
fixture.app(),
fixture.command(),
["lookma", "help", "ranges", "--output", "yaml"],
);
topic.assert_success();
topic.assert_stdout_contains("two revisions separated by two dots");
assert!(
!topic.stdout().trim_start().starts_with('{'),
"topic --output=yaml must not emit a structured document:\n{}",
topic.stdout()
);
}
#[test]
#[serial]
fn the_output_flag_reaches_the_word_but_not_the_flags() {
let fixture = downstream().flat().build();
let word = TestHarness::new().no_color().run(
fixture.app(),
fixture.command(),
["lookma", "help", "--output", "term-debug"],
);
word.assert_stdout_contains("[header]USAGE[/header]");
drop(word);
let flag = TestHarness::new().no_color().run(
fixture.app(),
fixture.command(),
["lookma", "--help", "--output", "term-debug"],
);
flag.assert_success();
flag.assert_stdout_contains("USAGE");
assert!(
!flag.stdout().contains("[header]"),
"`--help` renders in Auto, so the requested mode is not applied:\n{}",
flag.stdout()
);
}
#[test]
#[serial]
fn a_pager_request_rides_back_as_a_typed_success() {
let fixture = downstream().flat().build();
let result = TestHarness::new().text_output().run(
fixture.app(),
fixture.command(),
["lookma", "help", "--page"],
);
result.assert_success();
assert_eq!(result.success_kind(), Some(SuccessKind::PagedHelp));
result.assert_stdout_contains("USAGE");
}
fn assert_is_root_help(rendered: &str) {
assert!(
rendered.contains("Git range to diff"),
"expected the root's help, got:\n{rendered}"
);
}
#[test]
#[serial]
fn an_option_value_is_not_read_as_the_targeted_command() {
let fixture = downstream().build();
let args = ["lookma", "--output-file-path", "review", "--help"];
let dispatched = TestHarness::new().run(fixture.app(), fixture.command(), args);
dispatched.assert_success();
assert_is_root_help(dispatched.stdout());
drop(dispatched);
assert_is_root_help(&configured_help(fixture.app(), fixture.command(), &args));
}
#[test]
#[serial]
fn a_short_option_value_is_not_read_as_the_targeted_command() {
let fixture = downstream().build();
let result = TestHarness::new().run(
fixture.app(),
fixture.command(),
["lookma", "-p", "review", "--help"],
);
result.assert_success();
assert_is_root_help(result.stdout());
}
#[test]
#[serial]
fn the_walk_stops_where_the_help_request_is() {
let fixture = downstream().build();
for flag in ["--help", "-h"] {
let result =
TestHarness::new().run(fixture.app(), fixture.command(), ["lookma", flag, "review"]);
result.assert_success();
assert_is_root_help(result.stdout());
}
}
fn broken_theme() -> Theme {
Theme::new().add("header", "no-such-style")
}
fn app_with_a_broken_theme() -> App {
App::builder()
.templates(EmbeddedTemplates::new(TEMPLATES, ""))
.help_handling(true)
.include_framework_templates(false)
.theme(broken_theme())
.command_with(
"review",
FnHandler::new(|_m, _ctx| Ok(Output::Render(json!({})))),
|cfg| cfg,
)
.unwrap()
.build()
.unwrap()
}
#[test]
#[serial]
fn a_help_that_cannot_be_rendered_is_not_a_usage_error() {
let fixture = downstream().build();
for args in [
&["lookma", "help"][..],
&["lookma", "--help"][..],
&["lookma", "-h"][..],
] {
let result = TestHarness::new().run(&app_with_a_broken_theme(), fixture.command(), args);
result.assert_error();
result.assert_error_kind(RunErrorKind::Render);
result.assert_exit_status(ExitStatus::FAILURE);
result.assert_error_contains("failed to render help");
}
}
#[test]
#[serial]
fn a_render_failure_is_not_disguised_as_an_unrecognized_topic() {
let fixture = downstream().build();
let result = TestHarness::new().run(
&app_with_a_broken_theme(),
fixture.command(),
["lookma", "help", "review"],
);
result.assert_error();
result.assert_error_kind(RunErrorKind::Render);
result.assert_error_contains("failed to render help");
assert!(
!result
.error()
.unwrap_or_default()
.contains("wasn't recognized"),
"a broken theme is not an unknown topic: {:?}",
result.error()
);
}
#[test]
#[serial]
fn both_entry_points_render_the_same_help() {
let fixture = downstream().flat().build();
for args in [
["lookma", "help", "--output", "text"],
["lookma", "--help", "--output", "text"],
] {
let dispatched = TestHarness::new().run(fixture.app(), fixture.command(), args);
dispatched.assert_success();
let configured = configured_help(fixture.app(), fixture.command(), &args);
assert_eq!(
dispatched.stdout(),
configured,
"entry points disagree for {args:?}"
);
}
}
#[test]
#[serial]
fn a_flat_command_keeps_the_word_as_data_through_run_without_the_opt_in() {
let fixture = downstream().flat().without_help_word().build();
let result =
TestHarness::new()
.text_output()
.run(fixture.app(), fixture.command(), ["lookma", "help"]);
result.assert_success();
result.assert_stdout_eq("range=help");
}
#[test]
#[serial]
fn the_escape_delivers_the_literal_word_through_run() {
let fixture = downstream().flat().build();
let result = TestHarness::new().run(fixture.app(), fixture.command(), ["lookma", "--", "help"]);
result.assert_success();
result.assert_stdout_eq("range=help");
}
#[test]
#[serial]
fn a_normal_invocation_is_untouched_through_run() {
let fixture = downstream().flat().build();
let result = TestHarness::new().text_output().run(
fixture.app(),
fixture.command(),
["lookma", "main..HEAD"],
);
result.assert_success();
result.assert_stdout_eq("range=main..HEAD");
}