lib/file: Fix write function bugs

.gitignore

@@ -23,3 +23,5 @@
 
 #vscode
 .vscode
+
+writeTest

src/lib/file.cpp

@@ -26,7 +26,11 @@
 
 File::File(std::string path, char mode, uint64_t cursorPosition): mode(mode), path(path), cursorPosition(cursorPosition){
     std::filesystem::path filePath = path;
-    this->size = ErrorOr<uint64_t>(std::filesystem::file_size(filePath));
+    if(this->mode == 'w' || this->mode == 'a'){
+        this->size = ErrorOr<uint64_t>(0);
+    }else{
+        this->size = ErrorOr<uint64_t>(std::filesystem::file_size(filePath));
+    }
     this->open();
 }
 
@@ -166,7 +170,7 @@ ErrorOrVoid File::writeString(tiny_utf8::string data){
 }
 
 ErrorOr<File*> File::open(std::string path, char mode, uint64_t startPosition){
-    if (!std::filesystem::exists(path)) {
+    if (!std::filesystem::exists(path) && (mode == 'r' || mode == 'm')) {
         return ErrorOr<File*>(true, ErrorCodes::FILE_NOT_FOUND, nullptr);
     }
 

src/test/file.cpp

@@ -48,11 +48,11 @@ int main(){
     File *readFile;
 
     //writeByte test
-    writeFile = File::open("resources/unicode_data/writeTest", 'w').value;
+    writeFile = File::open("resources/writeTest", 'w').value;
     writeFile->writeByte('a');
     writeFile->close();
 
-    readFile = File::open("resources/unicode_data/writeTest", 'r').value;
+    readFile = File::open("resources/writeTest", 'r').value;
     uint8_t testByte = readFile->readByte().value;
     ASSERT(testByte == 'a');
     std::cout << "Passed write byte test." << std::endl;