History tests

app/src/main/java/org/solovyev/android/io/FileSystem.java

@@ -0,0 +1,42 @@
+package org.solovyev.android.io;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+import org.solovyev.android.calculator.ErrorReporter;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+@Singleton
+public class FileSystem {
+
+    @Inject
+    ErrorReporter errorReporter;
+
+    @Inject
+    public FileSystem() {
+    }
+
+    public boolean writeSilently(@NonNull File file, @NonNull String data) {
+        try {
+            write(file, data);
+            return true;
+        } catch (IOException e) {
+            errorReporter.onException(e);
+        }
+        return false;
+    }
+
+    public void write(@NonNull File file, @NonNull String data) throws IOException {
+        FileSaver.save(file, data);
+    }
+
+    @Nullable
+    public CharSequence read(File file) throws IOException {
+        return FileLoader.load(file);
+    }
+}