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feat: Add a --nocapture option to display test harnesses' outputs

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This new feature can be accessed by invoking rustlings with --nocapture.

Both unit and integration tests added.

closes #262

BREAKING CHANGES:
The following function take a new boolean argument:
	* `run`
	* `verify`
	* `test`
	* `compile_and_test`
This commit is contained in:
Abdou Seck 2020-06-04 10:31:17 -04:00
parent 02a2fe4871
commit 8ad5f9bf53
7 changed files with 113 additions and 21 deletions
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4
info.toml
View File

@ -802,7 +802,7 @@ name = "try_from_into"
path = "exercises/conversions/try_from_into.rs"
mode = "test"
hint = """
Follow the steps provided right before the `From` implementation.
Follow the steps provided right before the `TryFrom` implementation.
You can also use the example at https://doc.rust-lang.org/std/convert/trait.TryFrom.html"""
[[exercises]]
@ -819,4 +819,4 @@ mode = "test"
hint = """
The implementation of FromStr should return an Ok with a Person object,
or an Err with a string if the string is not valid.
This is a some like an `try_from_into` exercise."""
This is almost like the `try_from_into` exercise."""

44
src/exercise.rs
View File

@ -11,15 +11,21 @@ const I_AM_DONE_REGEX: &str = r"(?m)^\s*///?\s*I\s+AM\s+NOT\s+DONE";
const CONTEXT: usize = 2;
const CLIPPY_CARGO_TOML_PATH: &str = "./exercises/clippy/Cargo.toml";
// Get a temporary file name that is hopefully unique to this process
#[inline]
fn temp_file() -> String {
format!("./temp_{}", process::id())
}
// The mode of the exercise.
#[derive(Deserialize, Copy, Clone)]
#[serde(rename_all = "lowercase")]
pub enum Mode {
// Indicates that the exercise should be compiled as a binary
Compile,
// Indicates that the exercise should be compiled as a test harness
Test,
// Indicates that the exercise should be linted with clippy
Clippy,
}
@ -28,41 +34,60 @@ pub struct ExerciseList {
pub exercises: Vec<Exercise>,
}
// A representation of a rustlings exercise.
// This is deserialized from the accompanying info.toml file
#[derive(Deserialize)]
pub struct Exercise {
// Name of the exercise
pub name: String,
// The path to the file containing the exercise's source code
pub path: PathBuf,
// The mode of the exercise (Test, Compile, or Clippy)
pub mode: Mode,
// The hint text associated with the exercise
pub hint: String,
}
// An enum to track of the state of an Exercise.
// An Exercise can be either Done or Pending
#[derive(PartialEq, Debug)]
pub enum State {
// The state of the exercise once it's been completed
Done,
// The state of the exercise while it's not completed yet
Pending(Vec<ContextLine>),
}
// The context information of a pending exercise
#[derive(PartialEq, Debug)]
pub struct ContextLine {
// The source code that is still pending completion
pub line: String,
// The line number of the source code still pending completion
pub number: usize,
// Whether or not this is important
pub important: bool,
}
// The result of compiling an exercise
pub struct CompiledExercise<'a> {
exercise: &'a Exercise,
_handle: FileHandle,
}
impl<'a> CompiledExercise<'a> {
// Run the compiled exercise
pub fn run(&self) -> Result<ExerciseOutput, ExerciseOutput> {
self.exercise.run()
}
}
// A representation of an already executed binary
#[derive(Debug)]
pub struct ExerciseOutput {
// The textual contents of the standard output of the binary
pub stdout: String,
// The textual contents of the standard error of the binary
pub stderr: String,
}
@ -140,7 +165,11 @@ path = "{}.rs""#,
}
fn run(&self) -> Result<ExerciseOutput, ExerciseOutput> {
let cmd = Command::new(&temp_file())
let arg = match self.mode {
Mode::Test => "--show-output",
_ => ""
};
let cmd = Command::new(&temp_file()).arg(arg)
.output()
.expect("Failed to run 'run' command");
@ -205,6 +234,7 @@ impl Display for Exercise {
}
}
#[inline]
fn clean() {
let _ignored = remove_file(&temp_file());
}
@ -280,4 +310,16 @@ mod test {
assert_eq!(exercise.state(), State::Done);
}
#[test]
fn test_exercise_with_output() {
let exercise = Exercise {
name: "finished_exercise".into(),
path: PathBuf::from("tests/fixture/success/testSuccess.rs"),
mode: Mode::Test,
hint: String::new(),
};
let out = exercise.compile().unwrap().run().unwrap();
assert!(out.stdout.contains("THIS TEST TOO SHALL PASS"));
}
}

20
src/main.rs
View File

@ -28,10 +28,9 @@ fn main() {
.author("Olivia Hugger, Carol Nichols")
.about("Rustlings is a collection of small exercises to get you used to writing and reading Rust code")
.arg(
Arg::with_name("verbose")
.short("V")
.long("verbose")
.help("Show tests' standard output")
Arg::with_name("nocapture")
.long("nocapture")
.help("Show outputs from the test exercises")
)
.subcommand(
SubCommand::with_name("verify")
@ -87,6 +86,7 @@ fn main() {
let toml_str = &fs::read_to_string("info.toml").unwrap();
let exercises = toml::from_str::<ExerciseList>(toml_str).unwrap().exercises;
let verbose = matches.is_present("nocapture");
if let Some(ref matches) = matches.subcommand_matches("run") {
let name = matches.value_of("name").unwrap();
@ -98,7 +98,7 @@ fn main() {
std::process::exit(1)
});
run(&exercise).unwrap_or_else(|_| std::process::exit(1));
run(&exercise, verbose).unwrap_or_else(|_| std::process::exit(1));
}
if let Some(ref matches) = matches.subcommand_matches("hint") {
@ -116,10 +116,10 @@ fn main() {
}
if matches.subcommand_matches("verify").is_some() {
verify(&exercises).unwrap_or_else(|_| std::process::exit(1));
verify(&exercises, verbose).unwrap_or_else(|_| std::process::exit(1));
}
if matches.subcommand_matches("watch").is_some() && watch(&exercises).is_ok() {
if matches.subcommand_matches("watch").is_some() && watch(&exercises, verbose).is_ok() {
println!(
"{emoji} All exercises completed! {emoji}",
emoji = Emoji("🎉", "★")
@ -161,7 +161,7 @@ fn spawn_watch_shell(failed_exercise_hint: &Arc<Mutex<Option<String>>>) {
});
}
fn watch(exercises: &[Exercise]) -> notify::Result<()> {
fn watch(exercises: &[Exercise], verbose: bool) -> notify::Result<()> {
/* Clears the terminal with an ANSI escape code.
Works in UNIX and newer Windows terminals. */
fn clear_screen() {
@ -176,7 +176,7 @@ fn watch(exercises: &[Exercise]) -> notify::Result<()> {
clear_screen();
let to_owned_hint = |t: &Exercise| t.hint.to_owned();
let failed_exercise_hint = match verify(exercises.iter()) {
let failed_exercise_hint = match verify(exercises.iter(), verbose) {
Ok(_) => return Ok(()),
Err(exercise) => Arc::new(Mutex::new(Some(to_owned_hint(exercise)))),
};
@ -191,7 +191,7 @@ fn watch(exercises: &[Exercise]) -> notify::Result<()> {
.iter()
.skip_while(|e| !filepath.ends_with(&e.path));
clear_screen();
match verify(pending_exercises) {
match verify(pending_exercises, verbose) {
Ok(_) => return Ok(()),
Err(exercise) => {
let mut failed_exercise_hint = failed_exercise_hint.lock().unwrap();

11
src/run.rs
View File

@ -2,15 +2,22 @@ use crate::exercise::{Exercise, Mode};
use crate::verify::test;
use indicatif::ProgressBar;
pub fn run(exercise: &Exercise) -> Result<(), ()> {
// Invoke the rust compiler on the path of the given exercise,
// and run the ensuing binary.
// The verbose argument helps determine whether or not to show
// the output from the test harnesses (if the mode of the exercise is test)
pub fn run(exercise: &Exercise, verbose: bool) -> Result<(), ()> {
match exercise.mode {
Mode::Test => test(exercise)?,
Mode::Test => test(exercise, verbose)?,
Mode::Compile => compile_and_run(exercise)?,
Mode::Clippy => compile_and_run(exercise)?,
}
Ok(())
}
// Invoke the rust compiler on the path of the given exercise
// and run the ensuing binary.
// This is strictly for non-test binaries, so output is displayed
fn compile_and_run(exercise: &Exercise) -> Result<(), ()> {
let progress_bar = ProgressBar::new_spinner();
progress_bar.set_message(format!("Compiling {}...", exercise).as_str());

32
src/verify.rs
View File

@ -2,10 +2,18 @@ use crate::exercise::{CompiledExercise, Exercise, Mode, State};
use console::style;
use indicatif::ProgressBar;
pub fn verify<'a>(start_at: impl IntoIterator<Item = &'a Exercise>) -> Result<(), &'a Exercise> {
// Verify that the provided container of Exercise objects
// can be compiled and run without any failures.
// Any such failures will be reported to the end user.
// If the Exercise being verified is a test, the verbose boolean
// determines whether or not the test harness outputs are displayed.
pub fn verify<'a>(
start_at: impl IntoIterator<Item = &'a Exercise>,
verbose: bool
) -> Result<(), &'a Exercise> {
for exercise in start_at {
let compile_result = match exercise.mode {
Mode::Test => compile_and_test(&exercise, RunMode::Interactive),
Mode::Test => compile_and_test(&exercise, RunMode::Interactive, verbose),
Mode::Compile => compile_and_run_interactively(&exercise),
Mode::Clippy => compile_only(&exercise),
};
@ -21,11 +29,13 @@ enum RunMode {
NonInteractive,
}
pub fn test(exercise: &Exercise) -> Result<(), ()> {
compile_and_test(exercise, RunMode::NonInteractive)?;
// Compile and run the resulting test harness of the given Exercise
pub fn test(exercise: &Exercise, verbose: bool) -> Result<(), ()> {
compile_and_test(exercise, RunMode::NonInteractive, verbose)?;
Ok(())
}
// Invoke the rust compiler without running the resulting binary
fn compile_only(exercise: &Exercise) -> Result<bool, ()> {
let progress_bar = ProgressBar::new_spinner();
progress_bar.set_message(format!("Compiling {}...", exercise).as_str());
@ -38,6 +48,7 @@ fn compile_only(exercise: &Exercise) -> Result<bool, ()> {
Ok(prompt_for_completion(&exercise, None))
}
// Compile the given Exercise and run the resulting binary in an interactive mode
fn compile_and_run_interactively(exercise: &Exercise) -> Result<bool, ()> {
let progress_bar = ProgressBar::new_spinner();
progress_bar.set_message(format!("Compiling {}...", exercise).as_str());
@ -63,7 +74,11 @@ fn compile_and_run_interactively(exercise: &Exercise) -> Result<bool, ()> {
Ok(prompt_for_completion(&exercise, Some(output.stdout)))
}
fn compile_and_test(exercise: &Exercise, run_mode: RunMode) -> Result<bool, ()> {
// Compile the given Exercise as a test harness and display
// the output if verbose is set to true
fn compile_and_test(
exercise: &Exercise, run_mode: RunMode, verbose: bool
) -> Result<bool, ()> {
let progress_bar = ProgressBar::new_spinner();
progress_bar.set_message(format!("Testing {}...", exercise).as_str());
progress_bar.enable_steady_tick(100);
@ -73,7 +88,10 @@ fn compile_and_test(exercise: &Exercise, run_mode: RunMode) -> Result<bool, ()>
progress_bar.finish_and_clear();
match result {
Ok(_) => {
Ok(output) => {
if verbose {
println!("{}", output.stdout);
}
success!("Successfully tested {}", &exercise);
if let RunMode::Interactive = run_mode {
Ok(prompt_for_completion(&exercise, None))
@ -92,6 +110,8 @@ fn compile_and_test(exercise: &Exercise, run_mode: RunMode) -> Result<bool, ()>
}
}
// Compile the given Exercise and return an object with information
// about the state of the compilation
fn compile<'a, 'b>(
exercise: &'a Exercise,
progress_bar: &'b ProgressBar,

1
tests/fixture/success/testSuccess.rs
View File

@ -1,4 +1,5 @@
#[test]
fn passing() {
println!("THIS TEST TOO SHALL PASS");
assert!(true);
}

22
tests/integration_tests.rs
View File

@ -159,3 +159,25 @@ fn run_test_exercise_does_not_prompt() {
.code(0)
.stdout(predicates::str::contains("I AM NOT DONE").not());
}
#[test]
fn run_single_test_success_with_output() {
Command::cargo_bin("rustlings")
.unwrap()
.args(&["--nocapture", "r", "testSuccess"])
.current_dir("tests/fixture/success/")
.assert()
.code(0)
.stdout(predicates::str::contains("THIS TEST TOO SHALL PAS"));
}
#[test]
fn run_single_test_success_without_output() {
Command::cargo_bin("rustlings")
.unwrap()
.args(&["r", "testSuccess"])
.current_dir("tests/fixture/success/")
.assert()
.code(0)
.stdout(predicates::str::contains("THIS TEST TOO SHALL PAS").not());
}