tests: re: 79db394;

ref: ziglang/zig#1832

std/array_list.zig

@@ -398,3 +398,14 @@ test "std.ArrayList.insertSlice" {
     assert(list.len == 6);
     assert(list.items[0] == 1);
 }
+
+const Item = struct {
+    integer: i32,
+    sub_items: ArrayList(Item),
+};
+
+test "std.ArrayList: ArrayList(T) of struct T" {
+    var root = Item{ .integer = 1, .sub_items = ArrayList(Item).init(debug.global_allocator) };
+    try root.sub_items.append( Item{ .integer = 42, .sub_items = ArrayList(Item).init(debug.global_allocator) } );
+    assert(root.sub_items.items[0].integer == 42);
+}

test/cases/struct_contains_slice_of_itself.zig

@@ -5,6 +5,11 @@ const Node = struct {
     children: []Node,
 };
 
+const NodeAligned = struct {
+    payload: i32,
+    children: []align(@alignOf(NodeAligned)) NodeAligned,
+};
+
 test "struct contains slice of itself" {
     var other_nodes = []Node{
         Node{
@@ -41,3 +46,40 @@ test "struct contains slice of itself" {
     assert(root.children[2].children[0].payload == 31);
     assert(root.children[2].children[1].payload == 32);
 }
+
+test "struct contains aligned slice of itself" {
+    var other_nodes = []NodeAligned{
+        NodeAligned{
+            .payload = 31,
+            .children = []NodeAligned{},
+        },
+        NodeAligned{
+            .payload = 32,
+            .children = []NodeAligned{},
+        },
+    };
+    var nodes = []NodeAligned{
+        NodeAligned{
+            .payload = 1,
+            .children = []NodeAligned{},
+        },
+        NodeAligned{
+            .payload = 2,
+            .children = []NodeAligned{},
+        },
+        NodeAligned{
+            .payload = 3,
+            .children = other_nodes[0..],
+        },
+    };
+    const root = NodeAligned{
+        .payload = 1234,
+        .children = nodes[0..],
+    };
+    assert(root.payload == 1234);
+    assert(root.children[0].payload == 1);
+    assert(root.children[1].payload == 2);
+    assert(root.children[2].payload == 3);
+    assert(root.children[2].children[0].payload == 31);
+    assert(root.children[2].children[1].payload == 32);
+}