tests: Cleanup test_exact_ouput

tests/test_exact_output.rs

@@ -1,5 +1,6 @@
 use assert_cmd::Command;
 use std::ffi::OsStr;
+use std::process::Output;
 use std::str;
 use std::sync::Once;
 
@@ -38,56 +39,52 @@ fn initialize() {
         copy_test_data("tests/test_dir");
         copy_test_data("tests/test_dir2");
         copy_test_data("tests/test_dir_unicode");
+
+        Command::new("sh")
+            .arg("-c")
+            .arg("mkdir -p /tmp/unreadable_folder && chmod 000 /tmp/unreadable_folder")
+            .output()
+            .unwrap();
     });
 }
 
-fn exact_output_test<T: AsRef<OsStr>>(
-    command_args: Vec<T>,
-    valid_outputs: Vec<String>,
-    error_outputs: Vec<String>,
-) {
+fn run_cmd<T: AsRef<OsStr>>(command_args: Vec<T>) -> Output {
     initialize();
-
-    let mut a = &mut Command::cargo_bin("dust").unwrap();
-
+    let mut to_run = &mut Command::cargo_bin("dust").unwrap();
     for p in command_args {
-        a = a.arg(p);
+        to_run = to_run.arg(p);
     }
+    to_run.unwrap()
+}
 
-    if !valid_outputs.is_empty() {
-        let stdout_output = str::from_utf8(&a.unwrap().stdout).unwrap().to_owned();
-        let will_fail = valid_outputs.iter().any(|i| stdout_output.contains(i));
-        if !will_fail {
-            eprintln!(
-                "output(stdout):\n{}\ndoes not contain any of:\n{}",
-                stdout_output,
-                valid_outputs.join("\n\n")
-            );
-        }
-        assert!(will_fail);
-    }
+fn exact_stdout_test<T: AsRef<OsStr>>(command_args: Vec<T>, valid_stdout: Vec<String>) {
+    let to_run = run_cmd(command_args);
 
-    // check stderr
-    if !error_outputs.is_empty() {
-        let stderr_output = str::from_utf8(&a.unwrap().stderr).unwrap().to_owned();
-        let will_fail = error_outputs.iter().any(|i| stderr_output.contains(i));
-        if !will_fail {
-            eprintln!(
-                "output(stderr):\n{}\ndoes not contain any of:\n{}",
-                stderr_output,
-                valid_outputs.join("\n\n")
-            );
-        }
-        assert!(will_fail);
+    let stdout_output = str::from_utf8(&to_run.stdout).unwrap().to_owned();
+    let will_fail = valid_stdout.iter().any(|i| stdout_output.contains(i));
+    if !will_fail {
+        eprintln!(
+            "output(stdout):\n{}\ndoes not contain any of:\n{}",
+            stdout_output,
+            valid_stdout.join("\n\n")
+        );
     }
+    assert!(will_fail);
+}
+
+fn exact_stderr_test<T: AsRef<OsStr>>(command_args: Vec<T>, valid_stderr: String) {
+    let to_run = run_cmd(command_args);
+
+    let stderr_output = str::from_utf8(&to_run.stderr).unwrap().trim();
+    assert_eq!(stderr_output, valid_stderr);
 }
 
 // "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
 #[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_main_basic() {
     // -c is no color mode - This makes testing much simpler
-    exact_output_test(vec!["-c", "-B", "/tmp/test_dir/"], main_output(), vec![]);
+    exact_stdout_test(vec!["-c", "-B", "/tmp/test_dir/"], main_output());
 }
 
 #[cfg_attr(target_os = "windows", ignore)]
@@ -100,7 +97,7 @@ pub fn test_main_multi_arg() {
         "/tmp/test_dir",
         "/tmp/test_dir",
     ];
-    exact_output_test(command_args, main_output(), vec![]);
+    exact_stdout_test(command_args, main_output());
 }
 
 fn main_output() -> Vec<String> {
@@ -131,7 +128,7 @@ fn main_output() -> Vec<String> {
 #[test]
 pub fn test_main_long_paths() {
     let command_args = vec!["-c", "-p", "-B", "/tmp/test_dir/"];
-    exact_output_test(command_args, main_output_long_paths(), vec![]);
+    exact_stdout_test(command_args, main_output_long_paths());
 }
 
 fn main_output_long_paths() -> Vec<String> {
@@ -159,7 +156,7 @@ fn main_output_long_paths() -> Vec<String> {
 #[test]
 pub fn test_substring_of_names_and_long_names() {
     let command_args = vec!["-c", "-B", "/tmp/test_dir2"];
-    exact_output_test(command_args, no_substring_of_names_output(), vec![]);
+    exact_stdout_test(command_args, no_substring_of_names_output());
 }
 
 fn no_substring_of_names_output() -> Vec<String> {
@@ -193,7 +190,7 @@ fn no_substring_of_names_output() -> Vec<String> {
 #[test]
 pub fn test_unicode_directories() {
     let command_args = vec!["-c", "-B", "/tmp/test_dir_unicode"];
-    exact_output_test(command_args, unicode_dir(), vec![]);
+    exact_stdout_test(command_args, unicode_dir());
 }
 
 fn unicode_dir() -> Vec<String> {
@@ -220,7 +217,7 @@ fn unicode_dir() -> Vec<String> {
 #[test]
 pub fn test_apparent_size() {
     let command_args = vec!["-c", "-s", "-b", "/tmp/test_dir"];
-    exact_output_test(command_args, apparent_size_output(), vec![]);
+    exact_stdout_test(command_args, apparent_size_output());
 }
 
 fn apparent_size_output() -> Vec<String> {
@@ -245,38 +242,21 @@ fn apparent_size_output() -> Vec<String> {
 #[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_permission_normal() {
-    Command::new("sh")
-        .arg("-c")
-        .arg("mkdir -p /tmp/unreadable_folder && chmod 000 /tmp/unreadable_folder")
-        .output()
-        .unwrap();
     let command_args = vec!["/tmp/unreadable_folder"];
-    let permission_msg = r#"Did not have permissions for all"#.trim().to_string();
-    exact_output_test(command_args, vec![], vec![permission_msg]);
-
-    Command::new("sh")
-        .arg("-c")
-        .arg("chmod 555 /tmp/unreadable_folder")
-        .output()
-        .unwrap();
+    let permission_msg =
+        r#"Did not have permissions for all directories (add --print-errors to see errors)"#
+            .trim()
+            .to_string();
+    exact_stderr_test(command_args, permission_msg);
 }
 
 #[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_permission_flag() {
-    Command::new("sh")
-        .arg("-c")
-        .arg("mkdir -p /tmp/unreadable_folder && chmod 000 /tmp/unreadable_folder")
-        .output()
-        .unwrap();
     // add the flag to CLI
     let command_args = vec!["--print-errors", "/tmp/unreadable_folder"];
-    let permission_msg = r#"Did not have permissions for directories"#.trim().to_string();
-    exact_output_test(command_args, vec![], vec![permission_msg]);
-
-    Command::new("sh")
-        .arg("-c")
-        .arg("chmod 555 /tmp/unreadable_folder")
-        .output()
-        .unwrap();
+    let permission_msg = r#"Did not have permissions for directories: /tmp/unreadable_folder"#
+        .trim()
+        .to_string();
+    exact_stderr_test(command_args, permission_msg);
 }