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68f8369cb4
- file_io3: replace the hardcoded expected file size (117) with SAMPLE_TEXT.len(), so the check is derived from the actual content instead of an unexplained magic number. - file_io3: use create_dir_all instead of create_dir, and add a sample_file_path() helper shared by main/create_required_files/ file_cleanup to avoid three separate ad-hoc path constructions. - file_io1/file_io2: hoist the sample text into a SAMPLE_TEXT constant used by both the exercise and its solution, removing duplicated literals. No behavioral change: all three solutions were rebuilt and run locally, producing identical output (file size still 117, permissions still non-readonly) with no leftover files.
54 lines
1.2 KiB
Rust
54 lines
1.2 KiB
Rust
use std::fs;
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use std::path::Path;
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const TEST_FILE_NAME: &str = "SampleTextFile.txt";
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const SAMPLE_TEXT: &str = "This is the file content.";
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fn main() -> Result<(), std::io::Error> {
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create_required_files()?;
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let read_str_result = fs::read_to_string(TEST_FILE_NAME);
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match read_str_result {
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Ok(contents) => {
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// TODO : What would be the expected text ?
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assert_eq!(, contents);
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}
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Err(err) => {
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eprintln!("File read error. {}", err);
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}
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}
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file_cleanup()?;
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Ok(())
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}
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fn create_required_files() -> Result<(), std::io::Error> {
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let file_path = Path::new(TEST_FILE_NAME);
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if !file_path.exists() {
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fs::write(file_path, SAMPLE_TEXT)?;
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} else {
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println!("File already exist.");
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}
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Ok(())
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}
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fn file_cleanup() -> Result<(), std::io::Error> {
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let file_path = Path::new(TEST_FILE_NAME);
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if file_path.exists() {
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fs::remove_file(file_path).inspect(|_| {
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println!("Test file {} deleted.", TEST_FILE_NAME);
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})?;
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} else {
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println!(
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"No cleanup necessary since {} not exist.",
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file_path.display()
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);
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}
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Ok(())
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}
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