integration test for arg parsing, minor shuffling around of things

README.md

@@ -3,6 +3,7 @@ fif
 [![Crates.io](https://img.shields.io/crates/v/fif.svg?style=flat-square)](https://crates.io/crates/fif)
 [![Crates.io](https://img.shields.io/crates/l/fif.svg?style=flat-square)](https://git.bune.city/lynnesbian/fif/src/branch/master/LICENSE)
 ![Minimum Supported Rust Version](https://img.shields.io/badge/msrv-1.43.0-orange?style=flat-square)
+[![CI Status](https://drone.bune.city/api/badges/lynnesbian/fif/status.svg?style=flat-square)](https://drone.bune.city/lynnesbian/fif)
 
 A command-line tool for detecting and optionally correcting files with incorrect extensions.
 

src/main.rs

@@ -214,10 +214,10 @@ fn init_db() {
 }
 
 fn main() {
-	let args = parameters::Parameters::parse();
+	let args: parameters::Parameters = parameters::Parameters::parse();
 
 	let mut builder = env_logger::Builder::from_env(
-		Env::new().filter_or("RUST_LOG", "WARN")
+		Env::new().filter_or("RUST_LOG", "INFO")
 	);
 
 	builder
@@ -231,13 +231,7 @@ fn main() {
 
 	debug!("Iterating directory: {:?}", args.dirs);
 
-	let extensions: Vec<&str> = if let Some(exts) = &args.exts {
-		exts.iter().map(|s| s.as_str()).collect()
-	} else if let Some(exts) = &args.ext_set {
-		exts.extensions().to_vec()
-	} else {
-		unreachable!()
-	};
+	let extensions = args.extensions();
 
 	debug!("Checking files with extensions: {:?}", extensions);
 
@@ -254,7 +248,7 @@ fn main() {
 
 	if entries.is_empty() {
 		warn!("No files matching requested options found.");
-		exit(exitcode::DATAERR);
+		exit(exitcode::OK);
 	}
 
 	trace!("Found {} items to check", entries.len());
@@ -271,7 +265,7 @@ fn main() {
 	for result in &results {
 		match result {
 			Ok(r) => {
-				info!(
+				debug!(
 					"{:?} should have file extension {}",
 					r.file,
 					r.recommended_extension().unwrap_or_else(|| "???".into())
@@ -290,6 +284,7 @@ fn main() {
 		OutputFormat::Script => {
 			let s = Script::new();
 			if s.write_all(&results, &mut BufWriter::new(stdout().lock())).is_err() {
+				error!("Failed to write to stdout.");
 				exit(exitcode::IOERR);
 			}
 		}

src/parameters.rs

@@ -40,3 +40,18 @@ pub struct Parameters {
 	#[clap(name = "DIR", default_value = ".", parse(from_os_str))]
 	pub dirs: PathBuf,
 }
+
+impl Parameters {
+	pub fn extensions(&self) -> Vec<&str> {
+		if let Some(exts) = &self.exts {
+			// extensions supplied like "-e png,jpg,jpeg"
+			exts.iter().map(|s| s.as_str()).collect()
+		} else if let Some(exts) = &self.ext_set {
+			// extensions supplied like "-E images"
+			exts.extensions()
+		} else {
+			// neither -E nor -e was passed - this should be impossible
+			unreachable!()
+		}
+	}
+}

src/tests/mod.rs

@@ -8,6 +8,7 @@ use mime_guess::Mime;
 use smartstring::alias::String;
 use std::collections::HashMap;
 use std::path::Path;
+use crate::parameters::Parameters;
 
 const JPEG_BYTES: &[u8] = b"\xFF\xD8\xFF";
 const PNG_BYTES: &[u8] = b"\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";
@@ -109,12 +110,26 @@ fn simple_directory() {
 	let results = scan_from_walkdir(&entries);
 	for result in results {
 		let result = result.expect("Error while scanning file");
+
 		if !result.valid {
 			// this should be "wrong.jpg", which is a misnamed png file
+			// 1. ensure extension is "png"
+			assert_eq!(extension_from_path(&*result.file).unwrap(), String::from("jpg"));
+			// 2. ensure mime type detected is IMAGE_PNG
 			assert_eq!(result.mime, IMAGE_PNG);
+			// 3. ensure recommended extension is in the list of known extensions for PNG files
+			assert!(mime_extension_lookup(IMAGE_PNG).unwrap().contains(&result.recommended_extension().unwrap()));
 			continue;
 		}
 
+		// check if the recommended extension for this file is in the list of known extensions for its mimetype
+		assert!(
+			mime_extension_lookup(result.mime.clone())
+				.unwrap()
+				.contains(&result.recommended_extension().unwrap())
+		);
+
+		// make sure the guessed mimetype is correct based on the extension of the scanned file
 		assert_eq!(
 			result.mime,
 			match extension_from_path(&*result.file).as_deref() {
@@ -127,3 +142,18 @@ fn simple_directory() {
 		);
 	}
 }
+
+#[test]
+fn argument_parsing() {
+	use clap::Clap;
+
+	// check if "jpg" is in the list of extensions to be considered when passing "-E images"
+	let args: Parameters = Parameters::parse_from(vec!["fif", "-E", "images"]);
+	assert!(args.extensions().contains(&"jpg"));
+
+	// make sure "scan_hidden" is false
+	assert!(!args.scan_hidden);
+
+	// exts should be none
+	assert!(args.exts.is_none());
+}