test: using test helper

test/hash.cc

@@ -1,4 +1,5 @@
 #include "md5.h"
+#include "helper.h"
 #include "gtest/gtest.h"
 
 using md5::MD5;
@@ -262,14 +263,6 @@ const std::array<std::pair<uint8_t, std::string_view>, 256> test_items {{
     {0xff, "11b7aaa64c413d2f0fccf893881c46a2"},
 }};
 
-std::string build_test_data(uint8_t index) {
-    std::string data(index, 0x00);
-    for (uint8_t i = 0; i < index; ++i) {
-        data[i] = static_cast<char>(i);
-    }
-    return data;
-};
-
 TEST(md5sum, hash) {
     for (const auto &[index, expect] : test_items) {
         auto data = build_test_data(index);
@@ -279,13 +272,9 @@ TEST(md5sum, hash) {
 }
 
 TEST(md5sum, hash_ce) {
-    auto to_string = [](const std::array<char, 32> &digest) {
-        return std::string {digest.data(), 32};
-    };
-
     for (const auto &[index, expect] : test_items) {
         auto data = build_test_data(index);
-        EXPECT_EQ(to_string(MD5::HashCE(data)), expect);
-        EXPECT_EQ(to_string(MD5::HashCE(data.c_str(), index)), expect);
+        EXPECT_EQ(MD5::HashCE(data), expect);
+        EXPECT_EQ(MD5::HashCE(data.c_str(), index), expect);
     }
 }

test/helper.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <string>
+
+inline std::string build_test_data(const uint32_t size) {
+    std::string data(size, 0x00);
+    for (uint32_t i = 0; i < size; ++i) {
+        data[i] = static_cast<char>(i);
+    }
+    return data;
+};
+
+namespace testing::internal {
+
+inline bool operator==(const std::array<char, 32> &s1, const std::string_view &s2) {
+    return std::string {s1.data(), 32} == s2;
+}
+
+} // namespace testing::internal

test/simple.cc

@@ -1,4 +1,5 @@
 #include "md5.h"
+#include "helper.h"
 #include "gtest/gtest.h"
 
 using md5::MD5;
@@ -6,21 +7,21 @@ using md5::MD5;
 TEST(md5sum, empty) {
     auto expect = "d41d8cd98f00b204e9800998ecf8427e";
 
+    EXPECT_EQ(MD5::Hash(""), expect);
+    EXPECT_EQ(MD5::HashCE(""), expect);
+    EXPECT_EQ(MD5().Final().Digest(), expect);
+
     MD5 md5;
-    EXPECT_EQ(md5.Final().Digest(), expect);
-    md5.Reset();
-    EXPECT_EQ(md5.Final().Digest(), expect);
-    md5.Reset();
-    EXPECT_EQ(md5.Update("").Final().Digest(), expect);
+    EXPECT_EQ(md5.Reset().Final().Digest(), expect);
+    EXPECT_EQ(md5.Reset().Final().Digest(), expect);
+    EXPECT_EQ(md5.Reset().Update("").Final().Digest(), expect);
 }
 
 TEST(md5sum, simple) {
     auto expect = "5227827849ea5e9d942ff40dbbfaffd6";
 
     EXPECT_EQ(MD5::Hash("dnomd343"), expect);
-
-    auto result = std::string {MD5::HashCE("dnomd343").data(), 32};
-    EXPECT_EQ(result, expect);
+    EXPECT_EQ(MD5::HashCE("dnomd343"), expect);
 
     MD5 md5;
     EXPECT_EQ(md5.Reset().Update("").Update("dnomd343").Final().Digest(), expect);

test/stream.cc

@@ -1,13 +1,11 @@
 #include "md5.h"
+#include "helper.h"
 #include "gtest/gtest.h"
 
 using md5::MD5;
 
 TEST(md5sum, stream) {
-    std::string test_data(256 * 256, 0x00); // max -> 65536
-    for (uint64_t i = 0; i < test_data.size(); ++i) {
-        test_data[i] = static_cast<char>(i & 0xff);
-    }
+    auto test_data = build_test_data(256 * 256);
 
     MD5 md5;
     for (uint64_t size = 1; size <= 256; ++size) {