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use assert_cmd::Command; use fs_extra::dir::create_all; use fs_extra::file::read_to_string; use fs_extra::file::write_all; use std::collections::HashMap; use std::fmt::{Display, Formatter}; use std::path::{Path, PathBuf}; use tempdir::TempDir; use walkdir::WalkDir; #[derive(Debug)] pub struct IntegrationTestEnvironment { label: String, tmp_dir: TempDir, entries: HashMap<PathBuf, Option<String>>, } impl IntegrationTestEnvironment { pub fn new<L>(label: L) -> Self where L: AsRef<str>, { let label = label.as_ref().to_string(); let tmp_dir = TempDir::new(&label).expect("fail to create tmp directory"); Self { label, tmp_dir, entries: HashMap::new(), } } pub fn add_file<P, C>(&mut self, path: P, content: C) where P: AsRef<Path>, C: AsRef<str>, { self.entries.insert( path.as_ref().to_path_buf(), Some(content.as_ref().to_string()), ); } pub fn read_file<P>(&self, path: P) -> String where P: AsRef<Path>, { let path = self.tmp_dir.path().join(path.as_ref()); read_to_string(&path).expect(format!("fail to read file {:?}", path).as_str()) } pub fn add_dir<P>(&mut self, path: P) where P: AsRef<Path>, { self.entries.insert(path.as_ref().to_path_buf(), None); } pub fn setup(&self) { for (path, content) in self.entries.iter() { let path = self.tmp_dir.path().join(path); if let Some(content) = content { if let Some(path) = path.parent() { create_all(path, false) .expect(format!("fail to create directory {:?}", path).as_str()) } write_all(path, content).expect("fail to create file"); } else { create_all(&path, false) .expect(format!("fail to create directory {:?}", path).as_str()) } } } pub fn tree(&self) -> Vec<PathBuf> { let mut tree: Vec<PathBuf> = WalkDir::new(self.tmp_dir.path()) .into_iter() .filter_map(|dir_entry| { if let Ok(dir_entry) = dir_entry { if let Ok(dir_entry) = dir_entry.path().strip_prefix(self.tmp_dir.path()) { return Some(dir_entry.to_path_buf()); } } None }) .collect(); tree.sort(); tree } pub fn command<C>(&self, crate_name: C) -> Command where C: AsRef<str>, { let mut command = Command::cargo_bin(crate_name).unwrap(); command.current_dir(&self.tmp_dir.path()); command } pub fn path(&self) -> &Path { self.tmp_dir.path() } } impl Display for IntegrationTestEnvironment { fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result { for e in self.tree() { writeln!(f, "{}", e.to_string_lossy())?; } Ok(()) } } #[cfg(test)] mod test { use predicates::prelude::Predicate; use predicates::str::contains; use crate::IntegrationTestEnvironment; #[test] fn integration_test_environment() { let mut e = IntegrationTestEnvironment::new("test"); e.add_file("file1", "test 1"); e.add_file("dir/file2", "test 2"); e.add_dir("emptry_dir"); e.setup(); let display = e.to_string(); assert!(contains("file1").eval(display.as_str())); assert!(contains("dir/file2").eval(display.as_str())); assert!(contains("emptry_dir").eval(display.as_str())); assert!(contains("test 1").eval(e.read_file("file1").as_str())); } } #[macro_export] macro_rules! println_output { ($v:ident) => { println!( "{}", String::from_utf8($v.stderr.clone()).expect("fail to read stderr") ); println!("---------------------------"); println!( "{}", String::from_utf8($v.stdout.clone()).expect("fail to read stdout") ); println!("---------------------------"); println!("{}", $v.status); }; } #[macro_export] macro_rules! println_result_output { ($v:ident) => { match $v { Ok(output) => { println_output!(output); } Err(outputError) => { println!("output error !!"); println!("{}", outputError.to_string()); } } }; }