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Cleanup routines added for the created files during runs

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This commit is contained in:
kivancgnlp 2025-12-11 18:43:52 +03:00
parent 8e7e878eab
commit aef794d020
6 changed files with 239 additions and 39 deletions
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31
exercises/24_file_io/file_io1.rs
View File

@ -12,17 +12,40 @@ fn main() {
// TODO : What would be the expected text ? // TODO : What would be the expected text ?
assert_eq!(, contents); assert_eq!(, contents);
} }
Err(_) => { Err(err) => {
panic!("Error reading file."); eprintln!("File read error. {}", err);
} }
} }
file_cleanup();
} }
fn create_required_files() { fn create_required_files() {
let file_path = Path::new(TEST_FILE_NAME); let file_path = Path::new(TEST_FILE_NAME);
if !file_path.exists() { if !file_path.exists() {
fs::write(file_path, "This is the file content.").unwrap(); let file_write_result = fs::write(file_path, "This is the file content.");
println!("File created."); if file_write_result.is_ok() {
println!("Successfully wrote to file.");
} else {
panic!("Error writing to file.");
}
} else {
println!("File already exist.");
}
}
fn file_cleanup() {
let file_path = Path::new(TEST_FILE_NAME);
if file_path.exists() {
let remove_status = fs::remove_file(file_path);
if remove_status.is_ok() {
println!("Successfully removed file.");
} else {
panic!("Error deleting file.");
}
} else {
println!("No cleanup necassary since file not exist.");
} }
} }

56
exercises/24_file_io/file_io2.rs
View File

@ -2,19 +2,21 @@ use std::fs;
use std::io::{BufRead, BufReader, BufWriter, Write}; use std::io::{BufRead, BufReader, BufWriter, Write};
use std::path::Path; use std::path::Path;
const TEST_FILE_NAME: &str = "MultiLineTextFile.txt"; const TEST_INPUT_FILE_NAME: &str = "MultiLineTextFile.txt";
const TEST_OUTPUT_FILE_NAME: &str = "MultiLineOutputFile.txt";
fn main() { fn main() {
create_required_files(); create_required_files();
let input_file = fs::File::open(TEST_FILE_NAME); let input_file = fs::File::open(TEST_INPUT_FILE_NAME);
if input_file.is_err() { if input_file.is_err() {
panic!("Input file open error"); panic!("Input file open error");
} }
let buffered_input_file = BufReader::new(input_file.unwrap()); // TODO : How to create a new BufReader using input file
let buffered_input_file =;
let output_file = fs::File::create("MultiLineOutputFile.txt"); let output_file = fs::File::create(TEST_OUTPUT_FILE_NAME);
if output_file.is_err() { if output_file.is_err() {
eprintln!( eprintln!(
@ -23,8 +25,7 @@ fn main() {
); );
panic!("Output file open error"); panic!("Output file open error");
} }
// TODO : How to create a new BufReader using input file let mut buffered_file_writer = BufWriter::new(output_file.ok().unwrap());
let buffered_input_file =;
let mut line_number = 1; let mut line_number = 1;
@ -33,26 +34,59 @@ fn main() {
let write_result = let write_result =
buffered_file_writer.write(format!("Line {} : {}\n", line_number, line).as_bytes()); buffered_file_writer.write(format!("Line {} : {}\n", line_number, line).as_bytes());
if write_result.is_err() { if write_result.is_err() {
eprintln!("Write result error: {}", write_result.unwrap_err()); eprintln!("Line write error: {}", write_result.unwrap_err());
break; break;
} }
line_number += 1; line_number += 1;
} else { } else {
panic!("Write line error"); panic!("Line read error");
} }
} }
println!("{} : lines processed", line_number - 1); println!("{} : lines processed", line_number - 1);
file_cleanup();
} }
fn create_required_files() { fn create_required_files() {
let file_path = Path::new(TEST_FILE_NAME); let file_path = Path::new(TEST_INPUT_FILE_NAME);
if !file_path.exists() { if !file_path.exists() {
let text = "This is the first line of the text. let text = "This is the first line of the text.
This is the second line. This is the second line.
And this is the third and the last line."; And this is the third and the last line.";
fs::write(file_path, text).unwrap(); let file_write_result = fs::write(file_path, text);
println!("File created.");
if file_write_result.is_ok() {
println!("Multi line file created successfully!");
} else {
eprintln!(
"Error creating file : {} , error : {:?}",
file_path.display(),
file_write_result.err()
);
}
}
}
fn file_cleanup() {
let file_names = vec![TEST_INPUT_FILE_NAME, TEST_OUTPUT_FILE_NAME];
for file_name in file_names {
let file_path = Path::new(file_name);
if file_path.exists() {
let remove_status = fs::remove_file(file_path);
if remove_status.is_ok() {
println!("Successfully deleted file {}", file_name);
} else {
eprintln!(
"Error deleting file {}, err : {:?}",
file_name,
remove_status.err()
);
}
} else {
println!("No cleanup necassary since {} not exist.", file_name);
}
} }
} }

55
exercises/24_file_io/file_io3.rs
View File

@ -13,14 +13,19 @@ fn main() {
if let Ok(meta_data) = meta_data_result { if let Ok(meta_data) = meta_data_result {
println!("Metadata about the file : {:?}", path_buffer); println!("Metadata about the file : {:?}", path_buffer);
println!("File creation time {:?}", meta_data.created().unwrap()); println!("File creation time {:?}", meta_data.created());
println!("File size {}", meta_data.len()); println!("File size {}", meta_data.len());
assert_eq!(meta_data.len(), 117); assert_eq!(meta_data.len(), 117);
println!("File permissions {:?}", meta_data.permissions()); println!("File permissions {:?}", meta_data.permissions());
assert!(!meta_data.permissions().readonly()); assert!(!meta_data.permissions().readonly());
} else { } else {
panic!("Could not get metadata"); eprintln!(
"Could not get metadata. Error: {:?}",
meta_data_result.err()
);
} }
file_cleanup();
} }
fn create_required_files() { fn create_required_files() {
@ -29,15 +34,53 @@ fn create_required_files() {
let dir_path = file_path.parent().unwrap(); let dir_path = file_path.parent().unwrap();
if !dir_path.exists() { if !dir_path.exists() {
fs::create_dir(dir_path).unwrap(); let dir_create_result = fs::create_dir(dir_path);
println!("Created directory {:?}", dir_path); if dir_create_result.is_ok() {
println!("{:?} created", dir_path);
}
} }
if !file_path.exists() { if !file_path.exists() {
let text = "This is the first line of the text. let text = "This is the first line of the text.
This is the second line. This is the second line.
And this is the third and the last line."; And this is the third and the last line.";
fs::write(file_path, text).unwrap(); let file_write_result = fs::write(&file_path, text);
println!("File created.");
if file_write_result.is_ok() {
println!("Multi line file created successfully!");
} else {
eprintln!(
"Error creating file : {} , error : {:?}",
file_path.display(),
file_write_result.err()
);
}
}
}
fn file_cleanup() {
let mut path_buffer = PathBuf::new();
path_buffer.push("SampleFilesFolder");
path_buffer.push("MultiLineTextFile.txt");
if path_buffer.exists() {
let remove_status = fs::remove_file(&path_buffer);
if remove_status.is_ok() {
println!("Test file deleted.");
} else {
panic!("Error deleting file.");
}
}
path_buffer.pop();
if path_buffer.exists() {
let remove_status = fs::remove_dir(&path_buffer);
if remove_status.is_ok() {
println!("Test directory deleted.");
} else {
panic!("Error deleting directory.");
}
} }
} }

31
solutions/24_file_io/file_io1.rs
View File

@ -11,17 +11,40 @@ fn main() {
Ok(contents) => { Ok(contents) => {
assert_eq!("This is the file content.", contents); assert_eq!("This is the file content.", contents);
} }
Err(_) => { Err(err) => {
panic!("Error reading file."); eprintln!("File read error. {}", err);
} }
} }
file_cleanup();
} }
fn create_required_files() { fn create_required_files() {
let file_path = Path::new(TEST_FILE_NAME); let file_path = Path::new(TEST_FILE_NAME);
if !file_path.exists() { if !file_path.exists() {
fs::write(file_path, "This is the file content.").unwrap(); let file_write_result = fs::write(file_path, "This is the file content.");
println!("File created."); if file_write_result.is_ok() {
println!("Successfully wrote to file.");
} else {
panic!("Error writing to file.");
}
} else {
println!("File already exist.");
}
}
fn file_cleanup() {
let file_path = Path::new(TEST_FILE_NAME);
if file_path.exists() {
let remove_status = fs::remove_file(file_path);
if remove_status.is_ok() {
println!("Successfully removed file.");
} else {
panic!("Error deleting file.");
}
} else {
println!("No cleanup necassary since file not exist.");
} }
} }

50
solutions/24_file_io/file_io2.rs
View File

@ -2,11 +2,12 @@ use std::fs;
use std::io::{BufRead, BufReader, BufWriter, Write}; use std::io::{BufRead, BufReader, BufWriter, Write};
use std::path::Path; use std::path::Path;
const TEST_FILE_NAME: &str = "MultiLineTextFile.txt"; const TEST_INPUT_FILE_NAME: &str = "MultiLineTextFile.txt";
const TEST_OUTPUT_FILE_NAME: &str = "MultiLineOutputFile.txt";
fn main() { fn main() {
create_required_files(); create_required_files();
let input_file = fs::File::open(TEST_FILE_NAME); let input_file = fs::File::open(TEST_INPUT_FILE_NAME);
if input_file.is_err() { if input_file.is_err() {
panic!("Input file open error"); panic!("Input file open error");
@ -14,7 +15,7 @@ fn main() {
let buffered_input_file = BufReader::new(input_file.unwrap()); let buffered_input_file = BufReader::new(input_file.unwrap());
let output_file = fs::File::create("MultiLineOutputFile.txt"); let output_file = fs::File::create(TEST_OUTPUT_FILE_NAME);
if output_file.is_err() { if output_file.is_err() {
eprintln!( eprintln!(
@ -32,26 +33,59 @@ fn main() {
let write_result = let write_result =
buffered_file_writer.write(format!("Line {} : {}\n", line_number, line).as_bytes()); buffered_file_writer.write(format!("Line {} : {}\n", line_number, line).as_bytes());
if write_result.is_err() { if write_result.is_err() {
eprintln!("Write result error: {}", write_result.unwrap_err()); eprintln!("Line write error: {}", write_result.unwrap_err());
break; break;
} }
line_number += 1; line_number += 1;
} else { } else {
panic!("Write line error"); panic!("Line read error");
} }
} }
println!("{} : lines processed", line_number - 1); println!("{} : lines processed", line_number - 1);
file_cleanup();
} }
fn create_required_files() { fn create_required_files() {
let file_path = Path::new(TEST_FILE_NAME); let file_path = Path::new(TEST_INPUT_FILE_NAME);
if !file_path.exists() { if !file_path.exists() {
let text = "This is the first line of the text. let text = "This is the first line of the text.
This is the second line. This is the second line.
And this is the third and the last line."; And this is the third and the last line.";
fs::write(file_path, text).unwrap(); let file_write_result = fs::write(file_path, text);
println!("File created.");
if file_write_result.is_ok() {
println!("Multi line file created successfully!");
} else {
eprintln!(
"Error creating file : {} , error : {:?}",
file_path.display(),
file_write_result.err()
);
}
}
}
fn file_cleanup() {
let file_names = vec![TEST_INPUT_FILE_NAME, TEST_OUTPUT_FILE_NAME];
for file_name in file_names {
let file_path = Path::new(file_name);
if file_path.exists() {
let remove_status = fs::remove_file(file_path);
if remove_status.is_ok() {
println!("Successfully deleted file {}", file_name);
} else {
eprintln!(
"Error deleting file {}, err : {:?}",
file_name,
remove_status.err()
);
}
} else {
println!("No cleanup necassary since {} not exist.", file_name);
}
} }
} }

55
solutions/24_file_io/file_io3.rs
View File

@ -12,14 +12,19 @@ fn main() {
if let Ok(meta_data) = meta_data_result { if let Ok(meta_data) = meta_data_result {
println!("Metadata about the file : {:?}", path_buffer); println!("Metadata about the file : {:?}", path_buffer);
println!("File creation time {:?}", meta_data.created().unwrap()); println!("File creation time {:?}", meta_data.created());
println!("File size {}", meta_data.len()); println!("File size {}", meta_data.len());
assert_eq!(meta_data.len(), 117); assert_eq!(meta_data.len(), 117);
println!("File permissions {:?}", meta_data.permissions()); println!("File permissions {:?}", meta_data.permissions());
assert!(!meta_data.permissions().readonly()); assert!(!meta_data.permissions().readonly());
} else { } else {
panic!("Could not get metadata"); eprintln!(
"Could not get metadata. Error: {:?}",
meta_data_result.err()
);
} }
file_cleanup();
} }
fn create_required_files() { fn create_required_files() {
@ -28,15 +33,53 @@ fn create_required_files() {
let dir_path = file_path.parent().unwrap(); let dir_path = file_path.parent().unwrap();
if !dir_path.exists() { if !dir_path.exists() {
fs::create_dir(dir_path).unwrap(); let dir_create_result = fs::create_dir(dir_path);
println!("Created directory {:?}", dir_path); if dir_create_result.is_ok() {
println!("{:?} created", dir_path);
}
} }
if !file_path.exists() { if !file_path.exists() {
let text = "This is the first line of the text. let text = "This is the first line of the text.
This is the second line. This is the second line.
And this is the third and the last line."; And this is the third and the last line.";
fs::write(file_path, text).unwrap(); let file_write_result = fs::write(&file_path, text);
println!("File created.");
if file_write_result.is_ok() {
println!("Multi line file created successfully!");
} else {
eprintln!(
"Error creating file : {} , error : {:?}",
file_path.display(),
file_write_result.err()
);
}
}
}
fn file_cleanup() {
let mut path_buffer = PathBuf::new();
path_buffer.push("SampleFilesFolder");
path_buffer.push("MultiLineTextFile.txt");
if path_buffer.exists() {
let remove_status = fs::remove_file(&path_buffer);
if remove_status.is_ok() {
println!("Test file deleted.");
} else {
panic!("Error deleting file.");
}
}
path_buffer.pop();
if path_buffer.exists() {
let remove_status = fs::remove_dir(&path_buffer);
if remove_status.is_ok() {
println!("Test directory deleted.");
} else {
panic!("Error deleting directory.");
}
} }
} }