12/21/22 15:56:24

6 files changed, 69 insertions, 9 deletions

diff --git a/rust-cli/grrs/Cargo.toml b/rust-cli/grrs/Cargo.toml
index 08077b2..fc86a5f 100644
--- a/rust-cli/grrs/Cargo.toml
+++ b/rust-cli/grrs/Cargo.toml
@@ -6,4 +6,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-clap = { version = "4.0", features = ["derive"] }
\ No newline at end of file
+clap = { version = "4.0", features = ["derive"] }
+
+[dev-dependencies]
+assert_cmd = "2.0.7"
+predicates = "2.1.4"
\ No newline at end of file
diff --git a/rust-cli/grrs/src/lib.rs b/rust-cli/grrs/src/lib.rs
new file mode 100644
index 0000000..f91064f
--- /dev/null
+++ b/rust-cli/grrs/src/lib.rs
@@ -0,0 +1,13 @@
+use std::{io::{BufReader, BufRead, Error}, fs::File};
+
+pub fn find_matches(file: &File, pattern: &str) -> Result<Vec<String>, Error> {
+    let reader = BufReader::new(file);
+    let mut result = Vec::<String>::new();
+    for line in reader.lines() {
+        let line_val = line.unwrap();
+        if line_val.contains(&pattern) {
+            result.push(line_val);
+        }
+    }
+    return Ok(result);
+}
\ No newline at end of file
diff --git a/rust-cli/grrs/src/main.rs b/rust-cli/grrs/src/main.rs
index 09e2d3a..e5ed13b 100644
--- a/rust-cli/grrs/src/main.rs
+++ b/rust-cli/grrs/src/main.rs
@@ -1,5 +1,4 @@
-use std::io::{BufReader, BufRead};
-use std::fs::File;
+use std::fs::{File};
 use::clap::Parser;
 
 #[derive(Parser)]
@@ -8,14 +7,22 @@ struct Cli {
     path: std::path::PathBuf,
 }
 
-
 fn main() {
     let args = Cli::parse();
-    //println!("pattern: {}, path: {}",args.pattern, args.path.display());
+    if !args.path.exists() {
+        eprintln!("The file at '{}' does not exist", &args.path.display());
+        return;
+    }
+    if args.pattern.is_empty() {
+        eprintln!("No pattern was supplied, see --help");
+        return;
+    }
     let file = File::open(args.path).expect("could not read file");
-    let mut reader = BufReader::new(file);
-    for line in reader.lines() {
-        if line.unwrap_or_default().contains(&args.pattern) {
-        }
+    let matches = grrs::find_matches(&file, &args.pattern).unwrap();
+    if matches.len() < 1 {
+        return;
+    }
+    for line in matches {
+        println!("{}", line);
     }
 }
diff --git a/rust-cli/grrs/tests/finds_correct_matches.rs b/rust-cli/grrs/tests/finds_correct_matches.rs
new file mode 100644
index 0000000..db5228a
--- /dev/null
+++ b/rust-cli/grrs/tests/finds_correct_matches.rs
@@ -0,0 +1,4 @@
+#[test]
+fn finds_correct_matches() {
+    
+}
\ No newline at end of file
diff --git a/rust-cli/grrs/tests/finds_matches.rs b/rust-cli/grrs/tests/finds_matches.rs
new file mode 100644
index 0000000..5f301fc
--- /dev/null
+++ b/rust-cli/grrs/tests/finds_matches.rs
@@ -0,0 +1,12 @@
+use std::fs::File;
+
+#[test]
+fn finds_matches() {
+    let mut test_file = File::create("finds_matches.txt").unwrap();
+    std::io::Write::write_all(&mut test_file, b"asdf\ntesting").unwrap();
+    std::io::Write::flush(&mut test_file).unwrap();
+    let file_to_test = File::open("finds_matches.txt").expect("could not read test file");
+    let matches = grrs::find_matches(&file_to_test, "asdf").unwrap();
+    assert_eq!(matches.len(), 1);
+    std::fs::remove_file("finds_matches.txt").unwrap();
+}
\ No newline at end of file
diff --git a/rust-cli/grrs/tests/test_utils.rs b/rust-cli/grrs/tests/test_utils.rs
new file mode 100644
index 0000000..d408e87
--- /dev/null
+++ b/rust-cli/grrs/tests/test_utils.rs
@@ -0,0 +1,20 @@
+use std::{fs::{File}, path::Path};
+
+pub fn get_test_file_with_contents(name: &str, contents:&str) -> &File {
+    let  path = get_unused_filename();
+    return File::open(path);
+}
+
+fn get_unused_filename() -> String {
+    let files = std::fs::read_dir(Path::new(".")).unwrap();
+    let file_suffix = "-testing.txt";
+    let mut file_no = 1;
+    for file in files {
+        let dir = file.unwrap();
+    }
+
+    return file_no
+        .to_string()
+        .to_owned()
+        .push_str(&file_suffix);
+}
\ No newline at end of file