Complete hash_computer coverage; removed unneeded dependency

.gitignore

@@ -9,4 +9,6 @@ Cargo.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
+*.profraw
+*.profdata
 .vs

Cargo.toml

@@ -8,7 +8,6 @@ edition = "2018"
 
 [dependencies]
 bit_field = "0.10.1"
-crunchy = "0.2.2"
 md5 = "0.7.0"
 packed_simd = { version = "0.3.4", package = "packed_simd_2", features = ["into_bits"] }
 permutohedron = "0.2.4"

tests/hash_computer_test.rs

@@ -1,31 +1,15 @@
+#![feature(array_map)]
+
 use packed_simd::u8x32;
 
 extern crate trustpilot_challenge_rust;
 use trustpilot_challenge_rust::hash_computer;
 
-fn prepare_message(message_string: &str) -> u8x32 {
-    let mut bytes_static: [u8; 32] = [0; 32];
-    let bytes = message_string.as_bytes();
-    for i in 0..bytes.len() {
-        bytes_static[i] = bytes[i];
+fn parse_hash(hash: u128) -> u32 {
+    ((hash >> 96) as u32).to_be()
 }
 
-    bytes_static[bytes.len()] = b' ';
-
-    u8x32::from(bytes_static)
-}
-
-fn prepare_messages(message_strings: [&str; 8]) -> [u8x32; 8] {
-    let mut result: [u8x32; 8] = [u8x32::splat(0); 8];
-    for i in 0..8 {
-        result[i] = prepare_message(message_strings[i]);
-    }
-    result
-}
-
-#[test]
-fn it_computes_hashes() {
-    let messages: [&str; 8] = /*[""; 8];*/[
+static MESSAGES: [&str; 8] = [
     "DAPUpOGHw620yalJA0vjFPK7ThgHyAN",
     "4xRslaTeBCNyRu2EiIDueEx3BTbIP5H",
     "kFPd2zk60eEFpNwgEOZAcyDcxRVv0Y8",
@@ -36,7 +20,7 @@ fn it_computes_hashes() {
     "VXqOIzYdLIqx6tw8LJbR7SqR5iYgTlQ"
 ];
 
-    let expected: [u128; 8] = [
+static EXPECTED_HASHES: [u128; 8] = [
     0xC6F9E9B203CEA81A7BA28BE276B96A6F,
     0x45BF15D8B08E1AEADE1305B8E43B8F2C,
     0x7AA53B4627C8DD3714F2874EDE04DA7D,
@@ -47,11 +31,65 @@ fn it_computes_hashes() {
     0xCED45BA82BD1BDCF546255CB6A530FE3,
 ];
 
-    let messages_simd = prepare_messages(messages);
+// just some random u128 numbers
+static WRONG_HASHES: [u128; 8] = [
+    0xF6999358632CA7EBC3E687329B5B330E,
+    0x2DFA25CE0B6E11E794A4BAE87EECBBE4,
+    0x24436F08BD36CD5E010C4469D6612462,
+    0x78A35F791CA6C57396C1C4CB6A773848,
+    0xB6906785D8BD81BAF1AA1E2A9F1D17E9,
+    0x7841A7132C2784CE7FAC83AD01A43B45,
+    0x10D0C197833BE4365F9D5C8262005C77,
+    0x654CB866EE50773F999CD32C123E6C12,
+];
+
+static MIXED_HASHES: [u128; 4] = [
+    WRONG_HASHES[0],
+    EXPECTED_HASHES[3],
+    WRONG_HASHES[1],
+    EXPECTED_HASHES[6],
+];
+
+fn prepare_message(message_string: &str) -> u8x32 {
+    let mut bytes_static: [u8; 32] = [0; 32];
+    let bytes = message_string.as_bytes();
+    for i in 0..bytes.len() {
+        bytes_static[i] = bytes[i];
+    }
 
-    let hashes = hash_computer::compute_hashes(messages_simd, messages[0].len());
+    bytes_static[bytes.len()] = b' ';
 
+    u8x32::from(bytes_static)
+}
+
+fn prepare_messages(message_strings: [&str; 8]) -> [u8x32; 8] {
+    let mut result: [u8x32; 8] = [u8x32::splat(0); 8];
     for i in 0..8 {
-        assert_eq!((expected[i] >> 96) as u32, hashes[i].to_be());
+        result[i] = prepare_message(message_strings[i]);
     }
+    result
+}
+
+#[test]
+fn it_computes_hashes() {
+    let messages_simd = prepare_messages(MESSAGES);
+
+    let hashes = hash_computer::compute_hashes(&messages_simd, MESSAGES[0].len());
+    assert_eq!(EXPECTED_HASHES.map(parse_hash), hashes);
+}
+
+#[test]
+fn it_verifies_hashes() {
+    let messages_simd = prepare_messages(MESSAGES);
+
+    let results = hash_computer::find_hashes(&messages_simd, MESSAGES[0].len(), &(EXPECTED_HASHES.map(parse_hash)));
+    assert!(results.is_some());
+    assert_eq!(results.unwrap(), messages_simd);
+
+    let results = hash_computer::find_hashes(&messages_simd, MESSAGES[0].len(), &(WRONG_HASHES.map(parse_hash)));
+    assert!(results.is_none());
+
+    let results = hash_computer::find_hashes(&messages_simd, MESSAGES[0].len(), &(MIXED_HASHES.map(parse_hash)));
+    assert!(results.is_some());
+    assert_eq!(results.unwrap(), [messages_simd[3], messages_simd[6]]);
 }