File samples replaced by programatically generated files

exercises/24_file_io/SampleFilesFolder/MultiLineTextFile.txt

@@ -1,3 +0,0 @@
-This is the first line of the text.
-This is the second line.
-And this is the third and the last line.

exercises/24_file_io/SampleFilesFolder/SampleTextFile.txt

@@ -1 +0,0 @@
-This is the file content.

exercises/24_file_io/file_io1.rs

@@ -1,14 +1,17 @@
 use std::fs;
+use std::path::Path;
 
+const TEST_FILE_NAME: &str = "SampleTextFile.txt";
 fn main() {
 
-    let read_str_result = fs::read_to_string("exercises/24_file_io/SampleFilesFolder/SampleTextFile.txt");
+    create_required_files();
+
+    let read_str_result = fs::read_to_string(TEST_FILE_NAME);
 
     match read_str_result {
         Ok(contents) => {
-            // TODO : What should the read string would be ?
-            let expected_string = 
-            assert_eq!(expected_string, contents);
+            // TODO : What would be the expected text ?
+            assert_eq!(, contents);
         }
         Err(e) => {
             eprintln!("Error reading file: {}", e);
@@ -16,3 +19,14 @@ fn main() {
         }
     }
 }
+
+
+fn create_required_files(){
+    let file_path = Path::new(TEST_FILE_NAME);
+
+    if file_path.exists() == false {
+        fs::write(&file_path, "This is the file content.").unwrap();
+        println!("File created.");
+    }
+
+}

exercises/24_file_io/file_io2.rs

@@ -1,18 +1,22 @@
 
 use std::fs;
 use std::io::{BufRead, BufReader, BufWriter, Write};
+use std::path::Path;
+
+const TEST_FILE_NAME: &str = "MultiLineTextFile.txt";
 
 fn main() {
 
-    let input_file = fs::File::open("exercises/24_file_io/SampleFilesFolder/MultiLineTextFile.txt");
+    create_required_files();
+    let input_file = fs::File::open(TEST_FILE_NAME);
 
     if input_file.is_err() {
         eprintln!("Input file open error : {}", input_file.as_ref().unwrap_err());
         assert!(false);
     }
 
-    // TODO : How can we create a BufReader using input_file as parameter
-    let buffered_input_file = ;
+    // TODO : How to create a new BufReader using input file
+    let buffered_input_file =;
 
     let output_file = fs::File::create("MultiLineOutputFile.txt");
 
@@ -40,4 +44,17 @@ fn main() {
     }
 
     println!("{} : lines processed", line_number - 1);
+}
+
+fn create_required_files(){
+    let file_path = Path::new(TEST_FILE_NAME);
+
+    if file_path.exists() == false {
+        let text = "This is the first line of the text.
+        This is the second line.
+        And this is the third and the last line.";
+        fs::write(&file_path, text).unwrap();
+        println!("File created.");
+    }
+
 }

exercises/24_file_io/file_io3.rs

@@ -1,22 +1,22 @@
+use std::fs;
 use std::path::{Path, PathBuf};
 
 fn main() {
 
+    create_required_files();
     let mut path_buffer = PathBuf::new();
 
-    path_buffer.push("exercises");
-    path_buffer.push("24_file_io");
     path_buffer.push("SampleFilesFolder");
     path_buffer.push("MultiLineTextFile.txt");
 
-    // TODO : How we can get the metadata from path_buffer ?
+    // TODO : How to get metadata using path_buffer ?
     let meta_data_result = path_buffer.
 
     if let Ok(meta_data) = meta_data_result {
         println!("Metadata about the file : {:?}", path_buffer);
         println!("File creation time {:?}", meta_data.created().unwrap());
         println!("File size {}", meta_data.len());
-        assert_eq!(meta_data.len(), 101);
+        assert_eq!(meta_data.len(), 117);
         println!("File permissions {:?}", meta_data.permissions());
         assert_eq!(meta_data.permissions().readonly(), false);
     }else {
@@ -27,4 +27,25 @@ fn main() {
 
 
 
+}
+
+fn create_required_files(){
+    let file_path = PathBuf::from("SampleFilesFolder/MultiLineTextFile.txt");
+
+    let dir_path = file_path.parent().unwrap();
+
+    if dir_path.exists() == false {
+        fs::create_dir(dir_path).unwrap();
+        println!("Created directory {:?}", dir_path);
+    }
+
+    if file_path.exists() == false {
+
+        let text = "This is the first line of the text.
+        This is the second line.
+        And this is the third and the last line.";
+        fs::write(&file_path, text).unwrap();
+        println!("File created.");
+    }
+
 }

solutions/24_file_io/SampleFilesFolder/MultiLineTextFile.txt

@@ -1,3 +0,0 @@
-This is the first line of the text.
-This is the second line.
-And this is the third and the last line.

solutions/24_file_io/SampleFilesFolder/SampleTextFile.txt

@@ -1 +0,0 @@
-This is the file content.

solutions/24_file_io/file_io1.rs

@@ -1,8 +1,12 @@
 use std::fs;
+use std::path::Path;
 
+const TEST_FILE_NAME: &str = "SampleTextFile.txt";
 fn main() {
 
-    let read_str_result = fs::read_to_string("solutions/24_file_io/SampleFilesFolder/SampleTextFile.txt");
+    create_required_files();
+
+    let read_str_result = fs::read_to_string(TEST_FILE_NAME);
 
     match read_str_result {
         Ok(contents) => {
@@ -15,21 +19,13 @@ fn main() {
     }
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
 
-    #[test]
-    fn test_working_directory() {
-        let working_directory_result = std::path::Path::new(".").canonicalize();
+fn create_required_files(){
+    let file_path = Path::new(TEST_FILE_NAME);
 
-        match working_directory_result {
-            Ok(working_directory) => {
-                println!("The working directory is {:?}", working_directory);
-            }
-            Err(error) => {
-                println!("Error: {:?}", error);
-            }
-        }
+    if !file_path.exists() {
+        fs::write(file_path, "This is the file content.").unwrap();
+        println!("File created.");
     }
+
 }

solutions/24_file_io/file_io2.rs

@@ -1,10 +1,14 @@
 
 use std::fs;
 use std::io::{BufRead, BufReader, BufWriter, Write};
+use std::path::Path;
+
+const TEST_FILE_NAME: &str = "MultiLineTextFile.txt";
 
 fn main() {
 
-    let input_file = fs::File::open("solutions/24_file_io/SampleFilesFolder/MultiLineTextFile.txt");
+    create_required_files();
+    let input_file = fs::File::open(TEST_FILE_NAME);
 
     if input_file.is_err() {
         eprintln!("Input file open error : {}", input_file.as_ref().unwrap_err());
@@ -39,4 +43,17 @@ fn main() {
     }
 
     println!("{} : lines processed", line_number - 1);
+}
+
+fn create_required_files(){
+    let file_path = Path::new(TEST_FILE_NAME);
+
+    if file_path.exists() == false {
+        let text = "This is the first line of the text.
+        This is the second line.
+        And this is the third and the last line.";
+        fs::write(&file_path, text).unwrap();
+        println!("File created.");
+    }
+
 }

solutions/24_file_io/file_io3.rs

@@ -1,11 +1,11 @@
+use std::fs;
 use std::path::{Path, PathBuf};
 
 fn main() {
 
+    create_required_files();
     let mut path_buffer = PathBuf::new();
 
-    path_buffer.push("solutions");
-    path_buffer.push("24_file_io");
     path_buffer.push("SampleFilesFolder");
     path_buffer.push("MultiLineTextFile.txt");
 
@@ -15,7 +15,7 @@ fn main() {
         println!("Metadata about the file : {:?}", path_buffer);
         println!("File creation time {:?}", meta_data.created().unwrap());
         println!("File size {}", meta_data.len());
-        assert_eq!(meta_data.len(), 101);
+        assert_eq!(meta_data.len(), 117);
         println!("File permissions {:?}", meta_data.permissions());
         assert_eq!(meta_data.permissions().readonly(), false);
     }else {
@@ -26,4 +26,25 @@ fn main() {
 
 
 
+}
+
+fn create_required_files(){
+    let file_path = PathBuf::from("SampleFilesFolder/MultiLineTextFile.txt");
+
+    let dir_path = file_path.parent().unwrap();
+
+    if dir_path.exists() == false {
+        fs::create_dir(dir_path).unwrap();
+        println!("Created directory {:?}", dir_path);
+    }
+
+    if file_path.exists() == false {
+
+        let text = "This is the first line of the text.
+        This is the second line.
+        And this is the third and the last line.";
+        fs::write(&file_path, text).unwrap();
+        println!("File created.");
+    }
+
 }