Added ability to read WAD directory

src/tests/wad.rs

@@ -0,0 +1,36 @@
+use crate::WADFile;
+
+#[test]
+pub fn successful_wad_id() {
+    let wad_file = WADFile::new(String::from("WADs/doom1.wad"));
+
+    assert_eq!(wad_file.wad_id, "IWAD");
+}
+
+#[test]
+pub fn correct_lumps() {
+    let wad_file = WADFile::new(String::from("WADs/doom1.wad"));
+
+    assert_eq!(wad_file.num_lumps, 1264);
+}
+
+#[test]
+pub fn correct_dir_size() {
+    let wad_file = WADFile::new(String::from("WADs/doom1.wad"));
+
+    assert_eq!(wad_file.directory.len(), 1264);
+}
+
+#[test]
+pub fn correct_lump_name() {
+    let wad_file = WADFile::new(String::from("WADs/doom1.wad"));
+
+    assert_eq!(wad_file.directory[0].name, "PLAYPAL");
+}
+
+#[test]
+pub fn read_level_lump() {
+    let wad_file = WADFile::new(String::from("WADs/doom1.wad"));
+
+    assert_eq!(wad_file.directory[6].name, "E1M1");
+}