diff --git a/tests/at/cases_mapped.yaml b/tests/at/cases_mapped.yaml
new file mode 100644
index 00000000..3ac53d77
--- /dev/null
+++ b/tests/at/cases_mapped.yaml
@@ -0,0 +1,40 @@
+version: '1.0'
+cases:
+- id: suite_enc_switch_001_s1
+  name: 编码切换
+  module: enc_switch
+  steps:
+  - step_type: action
+    action: keyboard_hot_key
+    key: ctrl+t
+  - step_type: action
+    action: dtk_dropdown_menu
+    selector:
+      accessible_id: PToolButton
+    items:
+    - GB18030
+  - step_type: action
+    action: keyboard_type
+    text: UOS给世界更好的选择
+  - step_type: action
+    action: element_action
+    selector:
+      accessible_id: PActUtf8
+    do: click
+  - step_type: action
+    action: keyboard_press
+    key: enter
+  - step_type: action
+    action: keyboard_hot_key
+    key: ctrl+s
+  - step_type: action
+    action: file_dialog_select
+    path: /tmp/enc_switch_test.txt
+    wait: 3.0
+  - step_type: assert
+    action: assert_element
+    selector:
+      accessible_id: PTextEdit
+  - step_type: assert
+    action: assert_file_exists
+    path: /tmp/enc_switch_test.txt
diff --git a/tests/at/coverage-report.yaml b/tests/at/coverage-report.yaml
new file mode 100644
index 00000000..f22543fb
--- /dev/null
+++ b/tests/at/coverage-report.yaml
@@ -0,0 +1,9 @@
+scan_total: 3
+transient_items: []
+unreachable: 0
+denominator: 3
+covered: 3
+uncovered: 0
+coverage: 100.0
+passed: true
+uncovered_elements: []
diff --git a/tests/at/element-coverage-manifest.yaml b/tests/at/element-coverage-manifest.yaml
new file mode 100644
index 00000000..ec990db3
--- /dev/null
+++ b/tests/at/element-coverage-manifest.yaml
@@ -0,0 +1,26 @@
+version: '1.0'
+source: at-case-authoring:element-map.yaml
+scan_total: 3
+elements:
+  PToolButton:
+    role: push button
+    ui_name: UTF-8菜单
+    desc: 底部编码下拉菜单触发按钮（DDropdownMenu PToolButton）
+    locator: accessible_id
+  PActUtf8:
+    role: menu item
+    ui_name: UTF-8
+    desc: 编码菜单中 Unicode 组下的 UTF-8 选项（QAction，有 objectName）
+    locator: accessible_id
+  PTextEdit:
+    role: text
+    ui_name: 文本编辑区
+    desc: 文本编辑区域（TextEdit，键盘输入目标）
+    locator: accessible_id
+transient_items: []
+unresolved:
+- name: GB18030
+  role: menu item
+  ui_name: GB18030
+  desc: 编码菜单中简体中文组下的 GB18030 选项（QAction，无 setObjectName/setAccessibleName）
+  reason: id_name/object_name 未填 (TBD)，运行时无法按名定位
diff --git a/tests/at/yaml/elements.yaml b/tests/at/yaml/elements.yaml
new file mode 100644
index 00000000..3401f348
--- /dev/null
+++ b/tests/at/yaml/elements.yaml
@@ -0,0 +1,7 @@
+elements:
+  PToolButton:
+    accessible_id: PToolButton
+  PActUtf8:
+    accessible_id: PActUtf8
+  PTextEdit:
+    accessible_id: PTextEdit
diff --git a/tests/at/yaml/enc_switch/enc_switch.suite.yaml b/tests/at/yaml/enc_switch/enc_switch.suite.yaml
new file mode 100644
index 00000000..6b38360d
--- /dev/null
+++ b/tests/at/yaml/enc_switch/enc_switch.suite.yaml
@@ -0,0 +1,49 @@
+name: enc_switch_suite
+app: deepin-editor
+module: enc_switch
+setup:
+- action: session_start
+  command: deepin-editor
+  wait: 3.0
+suites:
+- id: suite_enc_switch_001_s1
+  name: 编码切换
+  description: ''
+  steps:
+  - step_type: action
+    action: keyboard_hot_key
+    key: ctrl+t
+  - step_type: action
+    action: dtk_dropdown_menu
+    selector:
+      accessible_id: PToolButton
+    items:
+    - GB18030
+  - step_type: action
+    action: keyboard_type
+    text: UOS给世界更好的选择
+  - step_type: action
+    action: element_action
+    selector:
+      accessible_id: PActUtf8
+    do: click
+  - step_type: action
+    action: keyboard_press
+    key: enter
+  - step_type: action
+    action: keyboard_hot_key
+    key: ctrl+s
+  - step_type: action
+    action: file_dialog_select
+    path: /tmp/enc_switch_test.txt
+    wait: 3.0
+  assert_steps:
+  - step_type: assert
+    action: assert_element
+    selector:
+      accessible_id: PTextEdit
+  - step_type: assert
+    action: assert_file_exists
+    path: /tmp/enc_switch_test.txt
+teardown:
+- action: session_stop