Did a lot of things.

_build.rs

@@ -0,0 +1,47 @@
+use std::env;
+use std::fs::read_dir;
+use std::fs::DirEntry;
+use std::fs::File;
+use std::io::Write;
+use std::path::Path;
+
+fn main() {
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let destination = Path::new(&out_dir).join("tests.rs");
+    let mut test_file = File::create(&destination).unwrap();
+
+    // write_header(&mut test_file);
+
+    // let test_data_directories = read_dir("./tests/data/").unwrap();
+    
+    /*
+    for directory in test_data_directories {
+        write_test(&mut test_file, &directory.unwrap());
+    }
+    */
+}
+
+fn write_header(test_file: &mut File) {
+    write!(
+        test_file,
+        r#"
+use insta::assert_yaml_snapshot_matches;
+use whoareyou::*;
+"#
+    )
+    .unwrap();
+}
+
+fn write_test(test_file: &mut File, directory: &DirEntry) {
+    let directory = directory.path().canonicalize().unwrap();
+    let path = directory.display();
+    let test_name = format!("prefix_if_needed_{}", directory.file_name().unwrap().to_string_lossy());
+
+    write!(
+        test_file,
+        include_str!("./tests/test_template"),
+        name = test_name,
+        path = path
+    )
+    .unwrap();
+}