add() test added + init() test added

LList.zig

@@ -98,7 +98,19 @@ pub fn Node(comptime T: type) type {
     };
 }
 
-test "leaks" {
+test "init()" {
+
+    var testList: LList(u64) = undefined;
+    try testList.init(testingAllocator);
+
+    try expect(testList.first == null);
+    try expect(testList.counter == 0);
+
+    try testList.deinit();
+    
+}
+
+test "deinit()" {
 
     var testList: LList(u64) = undefined;
     try testList.init(testingAllocator);
@@ -111,8 +123,27 @@ test "leaks" {
     
 }
 
+test "add()" {
 
-test "size" {
+    var testList: LList(u64) = undefined;
+    try testList.init(testingAllocator);
+
+    const firstNode = try testList.add(1);
+    const secondNode = try testList.add(2);
+    const thirdNode = try testList.add(3);
+    const fourtNode = try testList.add(4);
+
+    try expect(firstNode.value.* == 1);
+    try expect(secondNode.value.* == 2);
+    try expect(thirdNode.value.* == 3);
+    try expect(fourtNode.value.* == 4);
+
+    try testList.deinit();
+    
+}
+
+
+test "size()" {
 
     var testList: LList(u64) = undefined;
     try testList.init(testingAllocator);