chore: add rustic_testing to workspace crates

Signed-off-by: simonsan <[email protected]>

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["crates/core", "crates/backend", "examples/*"]
+members = ["crates/core", "crates/backend", "crates/testing", "examples/*"]
 resolver = "2"
 
 [workspace.package]
@@ -9,6 +9,10 @@ rust-version = "1.71.1"
 rustic_backend = { path = "crates/backend" }
 rustic_core = { path = "crates/core" }
 simplelog = "0.12.1"
+aho-corasick = "1.1.2"
+
+# dev-dependencies
+tempfile = "3.9.0"
 
 # see: https://nnethercote.github.io/perf-book/build-configuration.html
 [profile.dev]

crates/backend/Cargo.toml

@@ -72,7 +72,7 @@ clap = { version = "4.4.18", optional = true, features = ["derive", "env", "wrap
 merge = { version = "0.1.0", optional = true }
 
 # local backend
-aho-corasick = "1.1.2"
+aho-corasick = { workspace = true }
 shell-words = "1.1.0"
 walkdir = "2.4.0"
 

crates/core/Cargo.toml

@@ -141,4 +141,4 @@ rustdoc-json = "0.8.9"
 rustic_backend = { workspace = true }
 rustup-toolchain = "0.1.6"
 simplelog = "0.12.1"
-tempfile = "3.9.0"
+tempfile = { workspace = true }

crates/testing/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "rustic_testing"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+aho-corasick = { workspace = true }
+once_cell = "1.19.0"
+tempfile = { workspace = true }

crates/testing/src/lib.rs

@@ -0,0 +1,71 @@
+use aho_corasick::{AhoCorasick, PatternID};
+use std::{error::Error, ffi::OsStr};
+use tempfile::NamedTempFile;
+
+pub type TestResult<T> = std::result::Result<T, Box<dyn Error>>;
+
+pub fn get_matches<I, P>(patterns: I, output: String) -> TestResult<Vec<(PatternID, usize)>>
+where
+    I: IntoIterator<Item = P>,
+    P: AsRef<[u8]>,
+{
+    let ac = AhoCorasick::new(patterns)?;
+    let mut matches = vec![];
+    for mat in ac.find_iter(output.as_str()) {
+        add_match_to_vector(&mut matches, mat);
+    }
+    Ok(matches)
+}
+
+pub fn add_match_to_vector(matches: &mut Vec<(PatternID, usize)>, mat: aho_corasick::Match) {
+    matches.push((mat.pattern(), mat.end() - mat.start()))
+}
+
+pub fn get_temp_file() -> TestResult<NamedTempFile> {
+    Ok(NamedTempFile::new()?)
+}
+
+pub fn files_differ(
+    path_left: impl AsRef<OsStr>,
+    path_right: impl AsRef<OsStr>,
+) -> TestResult<bool> {
+    // diff the directories
+    #[cfg(not(windows))]
+    {
+        let proc = std::process::Command::new("diff")
+            .arg(path_left)
+            .arg(path_right)
+            .output()?;
+
+        if proc.stdout.is_empty() {
+            return Ok(false);
+        }
+    }
+
+    #[cfg(windows)]
+    {
+        let proc = std::process::Command::new("fc.exe")
+            .arg("/L")
+            .arg(path_left)
+            .arg(path_right)
+            .output()?;
+
+        let output = String::from_utf8(proc.stdout)?;
+
+        dbg!(&output);
+
+        let patterns = &["FC: no differences encountered"];
+        let ac = AhoCorasick::new(patterns)?;
+        let mut matches = vec![];
+
+        for mat in ac.find_iter(output.as_str()) {
+            matches.push((mat.pattern(), mat.end() - mat.start()));
+        }
+
+        if matches == vec![(PatternID::must(0), 30)] {
+            return Ok(false);
+        }
+    }
+
+    Ok(true)
+}