Initial setup for integration tests.

Cargo.lock

@@ -73,12 +73,80 @@ version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89203f3fba0a3795506acaad8ebce3c80c0af93f994d5a1d7a0b1eeb23271929"
 
+[[package]]
+name = "ntest"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "984caf6c8aa869418ef88062fc685d07d50c04308e63f7eaff6a395b1f5aff33"
+dependencies = [
+ "ntest_proc_macro_helper",
+ "ntest_test_cases",
+ "ntest_timeout",
+]
+
+[[package]]
+name = "ntest_proc_macro_helper"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "115562228962147ca51748d19446a4261535a7b6a7b5ff02681e527dcefc22f7"
+
+[[package]]
+name = "ntest_test_cases"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c03e3201148714c580c5cf1ef68b1ed4039203068193197834a43503164b8237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "ntest_timeout"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a870300c30d4224cb16022a4660fd8084d6cb4d29618563c3016b50cc757d1e7"
+dependencies = [
+ "ntest_proc_macro_helper",
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
 
+[[package]]
+name = "proc-macro-crate"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d6ea3c4595b96363c13943497db34af4460fb474a95c43f4446ad341b8c9785"
+dependencies = [
+ "toml",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "rand"
 version = "0.8.3"
@@ -124,6 +192,7 @@ name = "rshred"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "ntest",
  "rand",
  "walkdir",
 ]
@@ -137,12 +206,29 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "serde"
+version = "1.0.123"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92d5161132722baa40d802cc70b15262b98258453e85e5d1d365c757c73869ae"
+
 [[package]]
 name = "strsim"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
+[[package]]
+name = "syn"
+version = "1.0.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c700597eca8a5a762beb35753ef6b94df201c81cca676604f547495a0d7f0081"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.11.0"
@@ -152,12 +238,27 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "toml"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a31142970826733df8241ef35dc040ef98c679ab14d7c3e54d827099b3acecaa"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "unicode-width"
 version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
 [[package]]
 name = "vec_map"
 version = "0.8.2"

Cargo.toml

@@ -13,6 +13,9 @@ clap = "2.33.3"
 rand = "0.8.3"
 walkdir = "2.3.1"
 
+[dev-dependencies]
+ntest = "0.7.3"
+
 [profile.release]
 opt-level = 'z' # optimize for size
 lto = true

src/lib.rs

@@ -68,7 +68,9 @@ impl Shredder {
 
                 match File::create(absolute_path) {
                     Ok(file) => {
-                        println!("File's size: {}", file_length);
+                        if options.verbosity > Verbosity::Low {
+                            println!("File's size: {}", file_length);
+                        }
                         let mut buffer = BufWriter::new(&file);
 
                         for _ in 0..options.rewrite_iterations {
@@ -215,7 +217,7 @@ impl PartialEq for Verbosity {
 
 #[cfg(test)]
 mod tests {
-    use crate::shred::Verbosity;
+    use crate::Verbosity;
 
     #[test]
     fn verbosity_check() {

src/main.rs

@@ -2,11 +2,9 @@ extern crate clap;
 
 use clap::{App, Arg, crate_authors, crate_name, crate_version};
 
-use crate::shred::{Shredder, Verbosity, ShredOptions};
 use std::process::exit;
 use std::str::FromStr;
-
+use rshred::{Verbosity, Shredder, ShredOptions};
-mod shred;
 
 fn main() {
     let params = App::new(crate_name!())

tests/common.rs

@@ -0,0 +1,18 @@
+use std::fs::File;
+use std::io::Write;
+
+pub const PLAIN_FILE_CONTENT: &str = "some sensitive data";
+
+pub const TEST_FILE: &str = "target/test/test.txt";
+const TEST_DIR: &str = "target/test";
+
+pub fn setup() {
+    std::fs::create_dir_all(TEST_DIR).unwrap();
+    let mut file = File::create("target/test/test.txt").unwrap();
+    file.write(PLAIN_FILE_CONTENT.as_bytes()).unwrap();
+}
+
+pub fn cleanup() {
+    std::fs::remove_file(TEST_FILE).unwrap();
+    std::fs::remove_dir(TEST_DIR).unwrap();
+}

tests/integration_test.rs

@@ -0,0 +1,30 @@
+extern crate rshred;
+
+use ntest::timeout;
+use ntest::assert_false;
+
+mod common;
+
+#[test]
+#[timeout(1000)]
+fn test_basic_shredding() {
+    common::setup();
+
+    let initial_file_length = std::fs::metadata(common::TEST_FILE).unwrap().len();
+
+    let options = rshred::ShredOptions::new(common::TEST_FILE.to_string())
+        .set_verbosity(rshred::Verbosity::None)
+        .set_is_interactive(false)
+        .set_keep_files(true)
+        .build();
+    rshred::Shredder::with_options(options).run();
+
+    let shredded_file_length = std::fs::metadata(common::TEST_FILE).unwrap().len();
+    // file's size hasn't changed
+    assert_eq!(initial_file_length, shredded_file_length);
+
+    // file's content will become an invalid UTF-8 string
+    assert_false!(std::fs::read_to_string(common::TEST_FILE).is_ok());
+
+    common::cleanup();
+}