Remove lifetimes and internalize copies of strings

* Broke testing out into more distinct tests

FFI-tests/ffi_test.py

@@ -51,6 +51,7 @@ class PIHashes(Structure):
 # Setting the ctypes return type references for the foreign functions
 # returns a pointer to the library that we'll need to pass to all function calls
 lib.ext_init.restype = c_void_p
+lib.ext_init.argtypes = [c_char_p]
 # Returns a longlong hash, takes a pointer and a string
 lib.ext_get_ahash.restype = c_ulonglong
 lib.ext_get_ahash.argtypes = [c_void_p, c_char_p]
@@ -65,7 +66,7 @@ lib.ext_free_phashes.argtypes = [c_void_p]
 lib.ext_free.argtypes = [c_void_p]
 
 #initialize the library
-lib_struct = lib.ext_init("./.hash_cache".encode(encoding="utf-8"))
+lib_struct = lib.ext_init("./.hash_cache".encode('utf-8'))
 
 #print("Pointer to lib_struct: ", lib_struct)
 

src/cache.rs

@@ -58,26 +58,26 @@ impl PartialEq<CacheMetadata> for CacheMetadata {
 * Structure to hold implementation of the cache
 */
 #[repr(C)]
-pub struct Cache<'a> {
-    pub cache_dir: &'a str,
+pub struct Cache {
+    pub cache_dir: String,
     pub use_cache: bool,
 }
 
-impl<'a> Default for Cache<'a> {
-    fn default() -> Cache<'a> {
+impl Default for Cache {
+    fn default() -> Cache {
         Cache {
-            cache_dir: DEFAULT_CACHE_DIR,
+            cache_dir: String::from(DEFAULT_CACHE_DIR),
             use_cache: true,
         }
     }
 }
 
-impl<'a> Cache<'a> {
+impl Cache {
     /**
      * Create the required directories for the cache
      */
     pub fn init(&self) -> Result<(), Error> {
-        match create_dir_all(self.cache_dir) {
+        match create_dir_all(&self.cache_dir) {
             Ok(_) => {
                 let metadata_path_str = format!("{}/{}", self.cache_dir, CACHE_METADATA_FILE);
                 let metadata_path = Path::new(&metadata_path_str);
@@ -97,8 +97,8 @@ impl<'a> Cache<'a> {
                                 // If they match, continue
                                 if current_metadata != loaded_metadata {
                                     // If they don't wipe the cache to start new
-                                    match remove_dir_all(self.cache_dir) {
-                                        Ok(_) => match create_dir_all(self.cache_dir) {
+                                    match remove_dir_all(&self.cache_dir) {
+                                        Ok(_) => match create_dir_all(&self.cache_dir) {
                                             Ok(_) => (),
                                             Err(e) => println!("Error: {}", e),
                                         },
@@ -130,7 +130,7 @@ impl<'a> Cache<'a> {
      * Clean the cache directory completely
      */
     pub fn clean(&self) -> Result<(), Error> {
-        remove_dir_all(self.cache_dir)
+        remove_dir_all(&self.cache_dir)
     }
 
     /**
@@ -170,8 +170,11 @@ impl<'a> Cache<'a> {
                 );
                 let cache_dir_str =
                     format!("{}/image/{}x{}/{}", self.cache_dir, size, size, &sha1[..10]);
-                // println!("Saving: {}", cache_path_str);
-                match create_dir_all(cache_dir_str) {
+                println!("Test");
+                println!("{}", DEFAULT_CACHE_DIR);
+                println!("{}", &self.cache_dir);
+                //                println!("Saving: {}", &cache_path_str);
+                match create_dir_all(&cache_dir_str) {
                     Ok(_) => {
                         let file_path = Path::new(&cache_path_str);
                         match File::create(file_path) {
@@ -185,10 +188,16 @@ impl<'a> Cache<'a> {
                                     }
                                 }
                             }
-                            Err(e) => return Err(e),
+                            Err(e) => {
+                                println!("Unable to create file {:?}", file_path);
+                                return Err(e);
+                            }
                         }
                     }
-                    Err(e) => return Err(e),
+                    Err(e) => {
+                        println!("Unable to create directory {:?}", &cache_dir_str);
+                        return Err(e);
+                    }
                 }
             }
             Err(e) => {

src/hash/ahash.rs

@@ -11,19 +11,19 @@ use super::{HashType, PerceptualHash, Precision, PreparedImage};
 
 use super::image::GenericImageView;
 
-pub struct AHash<'a> {
-    prepared_image: Box<PreparedImage<'a>>,
+pub struct AHash {
+    prepared_image: Box<PreparedImage>,
 }
 
-impl<'a> AHash<'a> {
-    pub fn new(path: &'a Path, precision: &Precision, cache: &Option<Cache>) -> Self {
+impl AHash {
+    pub fn new(path: &Path, precision: &Precision, cache: &Option<Cache>) -> Self {
         AHash {
             prepared_image: Box::new(prepare_image(&path, &HashType::AHash, &precision, cache)),
         }
     }
 }
 
-impl<'a> PerceptualHash for AHash<'a> {
+impl PerceptualHash for AHash {
     /**
      * Calculate the ahash of the provided prepared image.
      *

src/hash/dhash.rs

@@ -11,19 +11,19 @@ use super::{HashType, PerceptualHash, Precision, PreparedImage};
 
 use super::image::GenericImageView;
 
-pub struct DHash<'a> {
-    prepared_image: Box<PreparedImage<'a>>,
+pub struct DHash {
+    prepared_image: Box<PreparedImage>,
 }
 
-impl<'a> DHash<'a> {
-    pub fn new(path: &'a Path, precision: &Precision, cache: &Option<Cache>) -> Self {
+impl DHash {
+    pub fn new(path: &Path, precision: &Precision, cache: &Option<Cache>) -> Self {
         DHash {
             prepared_image: Box::new(prepare_image(&path, &HashType::DHash, &precision, cache)),
         }
     }
 }
 
-impl<'a> PerceptualHash for DHash<'a> {
+impl PerceptualHash for DHash {
     /**
      * Calculate the dhash of the provided prepared image
      *

src/hash/mod.rs

@@ -6,12 +6,14 @@
 extern crate dft;
 extern crate image;
 
-use self::image::FilterType;
-use cache::Cache;
 use std::f64;
 use std::fmt;
 use std::path::Path;
 
+use cache::Cache;
+
+use self::image::FilterType;
+
 mod ahash;
 mod dhash;
 mod phash;
@@ -42,23 +44,23 @@ const HAMMING_DISTANCE_SIMILARITY_LIMIT: u64 = 5u64;
 /**
  * Prepared image that can be used to generate hashes
  */
-pub struct PreparedImage<'a> {
-    orig_path: &'a str,
+pub struct PreparedImage {
+    orig_path: String,
     image: Option<image::DynamicImage>,
 }
 
 /**
  * Wraps the various perceptual hashes
  */
-pub struct PerceptualHashes<'a> {
-    pub orig_path: &'a str,
+pub struct PerceptualHashes {
+    pub orig_path: String,
     pub ahash: u64,
     pub dhash: u64,
     pub phash: u64,
 }
 
-impl<'a> PerceptualHashes<'a> {
-    pub fn similar(&self, other: &'a PerceptualHashes<'a>) -> bool {
+impl PerceptualHashes {
+    pub fn similar(&self, other: &PerceptualHashes) -> bool {
         if self.orig_path != other.orig_path
             && calculate_hamming_distance(self.ahash, other.ahash)
                 <= HAMMING_DISTANCE_SIMILARITY_LIMIT
@@ -82,6 +84,7 @@ impl<'a> PerceptualHashes<'a> {
  * High aims for 128 bit precision
  */
 #[allow(dead_code)]
+#[derive(Copy, Clone)]
 pub enum Precision {
     Low,
     Medium,
@@ -89,7 +92,6 @@ pub enum Precision {
 }
 
 // Get the size of the required image
-//
 impl Precision {
     fn get_size(&self) -> u32 {
         match *self {
@@ -103,6 +105,7 @@ impl Precision {
 /**
  * Types of hashes supported
  */
+#[derive(Copy, Clone)]
 pub enum HashType {
     AHash,
     DHash,
@@ -141,12 +144,12 @@ pub trait PerceptualHash {
  * A PreparedImage struct with the required information for performing hashing
  *
  */
-pub fn prepare_image<'a>(
-    path: &'a Path,
+pub fn prepare_image(
+    path: &Path,
     hash_type: &HashType,
     precision: &Precision,
     cache: &Option<Cache>,
-) -> PreparedImage<'a> {
+) -> PreparedImage {
     let image_path = path.to_str().unwrap();
     let size: u32 = match *hash_type {
         HashType::PHash => precision.get_size() * 4,
@@ -154,10 +157,10 @@ pub fn prepare_image<'a>(
     };
     // Check if we have the already converted image in a cache and use that if possible.
     match *cache {
-        Some(ref c) => {
-            match c.get_image_from_cache(&path, size) {
+        Some(ref cache) => {
+            match cache.get_image_from_cache(&path, size) {
                 Some(image) => PreparedImage {
-                    orig_path: &*image_path,
+                    orig_path: String::from(&*image_path),
                     image: Some(image),
                 },
                 None => {
@@ -165,7 +168,7 @@ pub fn prepare_image<'a>(
                     // Oh, and save it in a cache
                     match processed_image.image {
                         Some(ref image) => {
-                            match c.put_image_in_cache(&path, size, &image) {
+                            match cache.put_image_in_cache(&path, size, &image) {
                                 Ok(_) => {}
                                 Err(e) => println!("Unable to store image in cache. {}", e),
                             };
@@ -197,7 +200,7 @@ fn process_image(image_path: &str, size: u32) -> PreparedImage {
         }
     };
     PreparedImage {
-        orig_path: &*image_path,
+        orig_path: String::from(&*image_path),
         image,
     }
 }
@@ -205,8 +208,8 @@ fn process_image(image_path: &str, size: u32) -> PreparedImage {
 /**
  * Get a specific HashType hash
  */
-pub fn get_perceptual_hash<'a>(
-    path: &'a Path,
+pub fn get_perceptual_hash(
+    path: &Path,
     precision: &Precision,
     hash_type: &HashType,
     cache: &Option<Cache>,
@@ -221,17 +224,17 @@ pub fn get_perceptual_hash<'a>(
 /**
  * Get all perceptual hashes for an image
  */
-pub fn get_perceptual_hashes<'a>(
-    path: &'a Path,
+pub fn get_perceptual_hashes(
+    path: &Path,
     precision: &Precision,
     cache: &Option<Cache>,
-) -> PerceptualHashes<'a> {
+) -> PerceptualHashes {
     let image_path = path.to_str().unwrap();
     let ahash = ahash::AHash::new(&path, &precision, &cache).get_hash(&cache);
     let dhash = dhash::DHash::new(&path, &precision, &cache).get_hash(&cache);
     let phash = phash::PHash::new(&path, &precision, &cache).get_hash(&cache);
     PerceptualHashes {
-        orig_path: &*image_path,
+        orig_path: String::from(&*image_path),
         ahash: ahash,
         dhash: dhash,
         phash: phash,

src/hash/phash.rs

@@ -12,19 +12,19 @@ use super::image::{DynamicImage, GenericImageView, Pixel};
 use super::prepare_image;
 use super::{HashType, PerceptualHash, Precision, PreparedImage};
 
-pub struct PHash<'a> {
-    prepared_image: Box<PreparedImage<'a>>,
+pub struct PHash {
+    prepared_image: Box<PreparedImage>,
 }
 
-impl<'a> PHash<'a> {
-    pub fn new(path: &'a Path, precision: &Precision, cache: &Option<Cache>) -> Self {
+impl PHash {
+    pub fn new(path: &Path, precision: &Precision, cache: &Option<Cache>) -> Self {
         PHash {
             prepared_image: Box::new(prepare_image(&path, &HashType::PHash, &precision, cache)),
         }
     }
 }
 
-impl<'a> PerceptualHash for PHash<'a> {
+impl PerceptualHash for PHash {
     /**
      * Calculate the phash of the provided prepared image
      *
@@ -45,14 +45,14 @@ impl<'a> PerceptualHash for PHash<'a> {
                 let data_matrix: Vec<Vec<f64>> = match *cache {
                     Some(ref c) => {
                         match c.get_matrix_from_cache(
-                            &Path::new(self.prepared_image.orig_path),
+                            &Path::new(&self.prepared_image.orig_path),
                             width as u32,
                         ) {
                             Some(matrix) => matrix,
                             None => {
                                 let matrix = create_data_matrix(width, height, &image);
                                 match c.put_matrix_in_cache(
-                                    &Path::new(self.prepared_image.orig_path),
+                                    &Path::new(&self.prepared_image.orig_path),
                                     width as u32,
                                     &matrix,
                                 ) {

src/lib.rs

@@ -20,20 +20,20 @@ pub mod cache;
 pub mod hash;
 
 #[repr(C)]
-pub struct PIHash<'a> {
-    cache: Option<Cache<'a>>,
+pub struct PIHash {
+    cache: Option<Cache>,
 }
 
-impl<'a> PIHash<'a> {
+impl PIHash {
     /**
      * Create a new pihash library, and initialize a cache of a path is passed.
      * If none is passed then no cache is initialized or used with the library
      */
-    pub fn new(cache_path: Option<&'a str>) -> PIHash<'a> {
+    pub fn new(cache_path: Option<&str>) -> PIHash {
         match cache_path {
             Some(path) => {
                 let cache = Cache {
-                    cache_dir: path,
+                    cache_dir: String::from(path),
                     use_cache: true,
                 };
                 match cache.init() {
@@ -57,7 +57,7 @@ impl<'a> PIHash<'a> {
         hash::get_perceptual_hash(&path, &precision, &hash_type, &self.cache)
     }
 
-    pub fn get_phashes(&self, path: &'a Path) -> hash::PerceptualHashes {
+    pub fn get_phashes(&self, path: &Path) -> hash::PerceptualHashes {
         hash::get_perceptual_hashes(&path, &hash::Precision::Medium, &self.cache)
     }
 
@@ -218,6 +218,9 @@ mod tests {
     use super::test::Bencher;
     use super::PIHash;
 
+    thread_local!(static LIB: PIHash = PIHash::new(Some(cache::DEFAULT_CACHE_DIR)));
+    thread_local!(static NO_CACHE_LIB: PIHash = PIHash::new(None));
+
     #[test]
     fn test_can_get_test_images() {
         let paths = fs::read_dir(&Path::new("./test_images")).unwrap();
@@ -257,7 +260,7 @@ mod tests {
     ) {
         let mut hashes: [u64; 3] = [0; 3];
         for index in 0..image_paths.len() {
-//            println!("{}, {:?}", index, image_paths[index]);
+            //            println!("{}, {:?}", index, image_paths[index]);
             let image_path = image_paths[index];
             let calculated_hash = lib.get_perceptual_hash(&image_path, &hash_precision, &hash_type);
             println!(
@@ -288,37 +291,57 @@ mod tests {
         }
     }
 
-    #[test]
-    fn test_confirm_ahash_results() {
-        // Prep_library
-        let lib = PIHash::new(Some(cache::DEFAULT_CACHE_DIR));
-        let no_cache_lib = PIHash::new(None);
+    /**
+     * Test image set with and without caching
+     */
+    fn test_image_set(
+        hash_type: hash::HashType,
+        hash_precision: hash::Precision,
+        max_hamming_distance: u64,
+        image_paths: [&Path; 3],
+        image_hashes: [u64; 3],
+    ) {
+        LIB.with(|lib| {
+            test_imageset_hash(
+                hash_type,
+                hash_precision,
+                max_hamming_distance,
+                image_paths,
+                image_hashes,
+                lib,
+            );
+        });
+        NO_CACHE_LIB.with(|lib| {
+            test_imageset_hash(
+                hash_type,
+                hash_precision,
+                max_hamming_distance,
+                image_paths,
+                image_hashes,
+                lib,
+            );
+        });
+    }
 
-        // Sample_01 tests
+    #[test]
+    fn test_confirm_ahash_results_sample_01() {
         let sample_01_images: [&Path; 3] = [
             &Path::new("./test_images/sample_01_large.jpg"),
             &Path::new("./test_images/sample_01_medium.jpg"),
             &Path::new("./test_images/sample_01_small.jpg"),
         ];
         let sample_01_hashes: [u64; 3] = [857051991849750, 857051991849750, 857051991849750];
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::AHash,
             hash::Precision::Medium,
             0u64,
             sample_01_images,
             sample_01_hashes,
-            &lib,
-        );
-        test_imageset_hash(
-            hash::HashType::AHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_01_images,
-            sample_01_hashes,
-            &no_cache_lib,
         );
+    }
 
-        // Sample_02 tests
+    #[test]
+    fn test_confirm_ahash_results_sample_02() {
         let sample_02_images: [&Path; 3] = [
             &Path::new("./test_images/sample_02_large.jpg"),
             &Path::new("./test_images/sample_02_medium.jpg"),
@@ -329,24 +352,17 @@ mod tests {
             18446744073441116160,
             18446744073441116160,
         ];
-        test_imageset_hash(
-            hash::HashType::AHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_02_images,
-            sample_02_hashes,
-            &lib,
-        );
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::AHash,
             hash::Precision::Medium,
             0u64,
             sample_02_images,
             sample_02_hashes,
-            &no_cache_lib,
         );
+    }
 
-        // Sample_03 tests
+    #[test]
+    fn test_confirm_ahash_results_sample_03() {
         let sample_03_images: [&Path; 3] = [
             &Path::new("./test_images/sample_03_large.jpg"),
             &Path::new("./test_images/sample_03_medium.jpg"),
@@ -354,24 +370,17 @@ mod tests {
         ];
         let sample_03_hashes: [u64; 3] =
             [135670932300497406, 135670932300497406, 135670932300497406];
-        test_imageset_hash(
-            hash::HashType::AHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_03_images,
-            sample_03_hashes,
-            &lib,
-        );
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::AHash,
             hash::Precision::Medium,
             0u64,
             sample_03_images,
             sample_03_hashes,
-            &no_cache_lib,
         );
+    }
 
-        // Sample_04 tests
+    #[test]
+    fn test_confirm_ahash_results_sample_04() {
         let sample_04_images: [&Path; 3] = [
             &Path::new("./test_images/sample_04_large.jpg"),
             &Path::new("./test_images/sample_04_medium.jpg"),
@@ -382,34 +391,20 @@ mod tests {
             18446460933225054208,
             18446460933225054208,
         ];
-        test_imageset_hash(
-            hash::HashType::AHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_04_images,
-            sample_04_hashes,
-            &lib,
-        );
-        test_imageset_hash(
-            hash::HashType::AHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_04_images,
-            sample_04_hashes,
-            &no_cache_lib,
-        );
-
-        // Clean_Cache
-        // super::teardown();
+        LIB.with(|lib| {
+            test_imageset_hash(
+                hash::HashType::AHash,
+                hash::Precision::Medium,
+                0u64,
+                sample_04_images,
+                sample_04_hashes,
+                lib,
+            );
+        });
     }
 
     #[test]
-    fn test_confirm_dhash_results() {
-        // Prep_library
-        let lib = PIHash::new(Some(cache::DEFAULT_CACHE_DIR));
-        let no_cache_lib = PIHash::new(None);
-
-        // Sample_01 tests
+    fn test_confirm_dhash_results_sample_01() {
         let sample_01_images: [&Path; 3] = [
             &Path::new("./test_images/sample_01_large.jpg"),
             &Path::new("./test_images/sample_01_medium.jpg"),
@@ -420,24 +415,20 @@ mod tests {
             3404580580803739582,
             3404580580803739582,
         ];
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_01_images,
-            sample_01_hashes,
-            &lib,
-        );
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_01_images,
-            sample_01_hashes,
-            &no_cache_lib,
-        );
+        LIB.with(|lib| {
+            test_imageset_hash(
+                hash::HashType::DHash,
+                hash::Precision::Medium,
+                0u64,
+                sample_01_images,
+                sample_01_hashes,
+                lib,
+            );
+        });
+    }
 
-        // Sample_02 tests
+    #[test]
+    fn test_confirm_dhash_results_sample_02() {
         let sample_02_images: [&Path; 3] = [
             &Path::new("./test_images/sample_02_large.jpg"),
             &Path::new("./test_images/sample_02_medium.jpg"),
@@ -448,24 +439,20 @@ mod tests {
             14726771606135242753,
             14726771606135242753,
         ];
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_02_images,
-            sample_02_hashes,
-            &lib,
-        );
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_02_images,
-            sample_02_hashes,
-            &no_cache_lib,
-        );
+        LIB.with(|lib| {
+            test_imageset_hash(
+                hash::HashType::DHash,
+                hash::Precision::Medium,
+                0u64,
+                sample_02_images,
+                sample_02_hashes,
+                lib,
+            );
+        });
+    }
 
-        // Sample_03 tests
+    #[test]
+    fn test_confirm_dhash_results_sample_03() {
         let sample_03_images: [&Path; 3] = [
             &Path::new("./test_images/sample_03_large.jpg"),
             &Path::new("./test_images/sample_03_medium.jpg"),
@@ -473,24 +460,20 @@ mod tests {
         ];
         let sample_03_hashes: [u64; 3] =
             [144115181601817086, 144115181601817086, 144115181601817086];
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_03_images,
-            sample_03_hashes,
-            &lib,
-        );
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_03_images,
-            sample_03_hashes,
-            &no_cache_lib,
-        );
+        LIB.with(|lib| {
+            test_imageset_hash(
+                hash::HashType::DHash,
+                hash::Precision::Medium,
+                0u64,
+                sample_03_images,
+                sample_03_hashes,
+                lib,
+            );
+        });
+    }
 
-        // Sample_04 tests
+    #[test]
+    fn test_confirm_dhash_results_sample_04() {
         let sample_04_images: [&Path; 3] = [
             &Path::new("./test_images/sample_04_large.jpg"),
             &Path::new("./test_images/sample_04_medium.jpg"),
@@ -501,58 +484,37 @@ mod tests {
             18374262188442386433,
             18374262188442386433,
         ];
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_04_images,
-            sample_04_hashes,
-            &lib,
-        );
-        test_imageset_hash(
-            hash::HashType::DHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_04_images,
-            sample_04_hashes,
-            &no_cache_lib,
-        );
-
-        // Clean_Cache
-        // super::teardown();
+        LIB.with(|lib| {
+            test_imageset_hash(
+                hash::HashType::DHash,
+                hash::Precision::Medium,
+                0u64,
+                sample_04_images,
+                sample_04_hashes,
+                lib,
+            );
+        });
     }
 
     #[test]
-    fn test_confirm_phash_results() {
-        // Prep_library
-        let lib = PIHash::new(Some(cache::DEFAULT_CACHE_DIR));
-        let no_cache_lib = PIHash::new(None);
-
-        // Sample_01 tests
+    fn test_confirm_phash_results_sample_01() {
         let sample_01_images: [&Path; 3] = [
             &Path::new("./test_images/sample_01_large.jpg"),
             &Path::new("./test_images/sample_01_medium.jpg"),
             &Path::new("./test_images/sample_01_small.jpg"),
         ];
         let sample_01_hashes: [u64; 3] = [72357778504597504, 72357778504597504, 72357778504597504];
-        test_imageset_hash(
-            hash::HashType::PHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_01_images,
-            sample_01_hashes,
-            &lib,
-        );
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::PHash,
             hash::Precision::Medium,
             0u64,
             sample_01_images,
             sample_01_hashes,
-            &no_cache_lib,
         );
+    }
 
-        // Sample_02 tests
+    #[test]
+    fn test_confirm_phash_results_sample_02() {
         let sample_02_images: [&Path; 3] = [
             &Path::new("./test_images/sample_02_large.jpg"),
             &Path::new("./test_images/sample_02_medium.jpg"),
@@ -563,24 +525,17 @@ mod tests {
             5332332327550844928,
             5332332327550844928,
         ];
-        test_imageset_hash(
-            hash::HashType::PHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_02_images,
-            sample_02_hashes,
-            &lib,
-        );
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::PHash,
             hash::Precision::Medium,
             0u64,
             sample_02_images,
             sample_02_hashes,
-            &no_cache_lib,
         );
+    }
 
-        // Sample_03 tests
+    #[test]
+    fn test_confirm_phash_results_sample_03() {
         let sample_03_images: [&Path; 3] = [
             &Path::new("./test_images/sample_03_large.jpg"),
             &Path::new("./test_images/sample_03_medium.jpg"),
@@ -591,24 +546,17 @@ mod tests {
             6917529027641081856,
             6917529027641081856,
         ];
-        test_imageset_hash(
-            hash::HashType::PHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_03_images,
-            sample_03_hashes,
-            &lib,
-        );
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::PHash,
             hash::Precision::Medium,
             0u64,
             sample_03_images,
             sample_03_hashes,
-            &no_cache_lib,
         );
+    }
 
-        // Sample_04 tests
+    #[test]
+    fn test_confirm_phash_results_sample_04() {
         let sample_04_images: [&Path; 3] = [
             &Path::new("./test_images/sample_04_large.jpg"),
             &Path::new("./test_images/sample_04_medium.jpg"),
@@ -619,25 +567,13 @@ mod tests {
             10997931646002397184,
             10997931646002397184,
         ];
-        test_imageset_hash(
+        test_image_set(
             hash::HashType::PHash,
             hash::Precision::Medium,
             0u64,
             sample_04_images,
             sample_04_hashes,
-            &lib,
         );
-        test_imageset_hash(
-            hash::HashType::PHash,
-            hash::Precision::Medium,
-            0u64,
-            sample_04_images,
-            sample_04_hashes,
-            &no_cache_lib,
-        );
-
-        // Clean_Cache
-        // super::teardown();
     }
 
     #[cfg(feature = "bench")]
@@ -655,7 +591,6 @@ mod tests {
         );
 
         bench.iter(|| {
-            // Sample_01 Bench
             lib.get_perceptual_hash(
                 &Path::new("./test_images/sample_01_large.jpg"),
                 &hash::Precision::Medium,
@@ -671,7 +606,6 @@ mod tests {
         let lib = PIHash::new(None);
 
         bench.iter(|| {
-            // Sample_01 Bench
             lib.get_perceptual_hash(
                 &Path::new("./test_images/sample_01_large.jpg"),
                 &hash::Precision::Medium,

src/main.rs

@@ -32,6 +32,7 @@ Options:
     -a, --ahash     Include an ahash calculation.
     -d, --dhash     Include an dhash calculation.
     -p, --phash     Include an phash calculation.
+    -n, --nocache  Disable caching behavior.
 ";
 
 #[derive(Debug, Deserialize)]
@@ -42,6 +43,7 @@ struct Args {
     flag_phash: bool,
     arg_path: String,
     arg_comparison: Vec<String>,
+    flag_nocache: bool,
 }
 
 fn main() {
@@ -55,8 +57,14 @@ fn main() {
         std::process::exit(0);
     }
 
+    let cache = if args.flag_nocache {
+        None
+    } else {
+        Some(pihash::cache::DEFAULT_CACHE_DIR)
+    };
+
     // Init the hashing library
-    let lib = pihash::PIHash::new(Some(pihash::cache::DEFAULT_CACHE_DIR));
+    let lib = pihash::PIHash::new(cache);
 
     // println!("{:?}", args);
     if args.arg_comparison.len() > 0 {
@@ -72,10 +80,10 @@ fn main() {
             ));
         }
 
-        let mut similar_images: Vec<&str> = Vec::new();
+        let mut similar_images: Vec<String> = Vec::new();
         for comparison_hash in comparison_hashes {
             if base_hash.similar(&comparison_hash) {
-                similar_images.push(&comparison_hash.orig_path);
+                similar_images.push(String::from(&comparison_hash.orig_path));
             }
         }
 
@@ -106,11 +114,11 @@ fn flags_get_all_perceptual_hashes(args: &Args) -> bool {
         || (!args.flag_ahash && !args.flag_dhash && !args.flag_phash)
 }
 
-fn get_requested_perceptual_hashes<'a>(
+fn get_requested_perceptual_hashes(
     lib: &pihash::PIHash,
-    image_path: &'a Path,
+    image_path: &Path,
     args: &Args,
-) -> pihash::hash::PerceptualHashes<'a> {
+) -> pihash::hash::PerceptualHashes {
     let ahash = if args.flag_ahash || flags_get_all_perceptual_hashes(&args) {
         lib.get_ahash(&image_path)
     } else {
@@ -130,7 +138,7 @@ fn get_requested_perceptual_hashes<'a>(
     };
 
     pihash::hash::PerceptualHashes {
-        orig_path: image_path.to_str().unwrap(),
+        orig_path: String::from(image_path.to_str().unwrap()),
         ahash: ahash,
         dhash: dhash,
         phash: phash,