1 files changed, 50 insertions, 0 deletions
diff --git a/src/test/persistence/FSTest.java b/src/test/persistence/FSTest.java
new file mode 100644
index 0000000..d8b8660
--- /dev/null
+++ b/src/test/persistence/FSTest.java
@@ -0,0 +1,50 @@
+package persistence;
+
+import model.asn1.exceptions.InvalidDBException;
+import org.json.JSONObject;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class FSTest {
+    @Test
+    void testReadFail() {
+        // open(2) - EPERM
+        assertThrows(InvalidDBException.class, () -> FS.read(Path.of("/dev/mem")));
+        // open(2) - EISDIR
+        assertThrows(InvalidDBException.class, () -> FS.read(Path.of("/")));
+        // open(2) - ENOENT
+        assertThrows(InvalidDBException.class,
+                () -> FS.read(Path.of("919123082901382901", "9210388888888190231")));
+        // Cannot parse
+        assertThrows(InvalidDBException.class, () -> FS.read(Path.of("/dev/null")));
+        assertThrows(InvalidDBException.class, () -> FS.read(Path.of("README.md")));
+    }
+
+    @Test
+    void testReadSuccess() {
+        assertTrue(FS.read(Path.of("data", "valid_full.json")).keySet().contains("serial"));
+    }
+
+    @Test
+    void testWriteFail() {
+        // open(2) - EISDIR
+        assertThrows(IOException.class, () -> FS.write(Path.of("/"), new JSONObject()));
+        // open(2) - EPERM
+        assertThrows(IOException.class, () -> FS.write(Path.of("/dev/abc"), new JSONObject()));
+        // open(2) - ENOENT
+        assertThrows(IOException.class, () -> FS.write(Path.of("asdjiasoda", "jisdsaod"), new JSONObject()));
+    }
+
+    @Test
+    void testWriteSuccess() throws IOException {
+        FS.write(Path.of("data", ".tmp"), new JSONObject());
+        assertTrue(Files.exists(Path.of("data")));
+        Files.delete(Path.of("data", ".tmp"));
+    }
+}