Fix unit test

Author: zenden2k

Source/Core/Utils/CoreUtils.cpp

@@ -529,6 +529,9 @@ int64_t GetFileSize(const std::string& utf8Filename) {
 }
 
 std::string FileSizeToString(int64_t sizeBytes) {
+    if (sizeBytes < 0) {
+        return {};
+    }
     const char* units[] = { "B", "KB", "MB", "GB", "TB", "PB" };
     const int numUnits = sizeof(units) / sizeof(units[0]);
     double size = static_cast<double>(sizeBytes);

Source/Core/Utils/Tests/CoreUtilsTest.cpp

@@ -163,11 +163,11 @@ TEST_F(CoreUtilsTest, GetDefaultExtensionForMimeType)
 
 TEST_F(CoreUtilsTest, fileSizeToString) 
 {
-    EXPECT_EQ(FileSizeToString(140*1024*1024), "140.0 MB");
-    EXPECT_EQ(FileSizeToString(static_cast<int64_t>(25.5*1024)), "26 KB");
-    EXPECT_EQ(FileSizeToString(0), "0 bytes");
-    EXPECT_EQ("10.0 GB", FileSizeToString(10ULL * 1024 * 1024 * 1024));
-    EXPECT_EQ("n/a", FileSizeToString(-1));
+    EXPECT_EQ(FileSizeToString(140*1024*1024), "140 MB");
+    EXPECT_EQ(FileSizeToString(static_cast<int64_t>(25.5*1024)), "25.5 KB");
+    EXPECT_EQ(FileSizeToString(0), "0 B");
+    EXPECT_EQ("10 GB", FileSizeToString(10ULL * 1024 * 1024 * 1024));
+    EXPECT_EQ("", FileSizeToString(-1));
 }
 
 TEST_F(CoreUtilsTest, Utf8ToWstring)