add tests (在测试模块，增加 emv界面测试 和 计量界面测试)

tests/test_weight.py

@@ -0,0 +1,146 @@
+from common import *
+
+from PySide6.QtWidgets import (
+    QApplication,
+    QWidget,
+    QFormLayout,
+    QHBoxLayout,
+    QVBoxLayout,
+    QLabel,
+    QSpacerItem,
+    QSizePolicy,
+)
+from PySide6.QtCore import Qt
+from qfluentwidgets import LineEdit, PushButton, StrongBodyLabel
+
+
+class WeightControlUI(QWidget):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        # ========== 1. 窗口基础设置 ==========
+        self.setWindowTitle("计量一体机调试")
+        self.resize(800, 600)  # 窗口大小
+        self.setStyleSheet("background-color: white;")  # 背景颜色，根据主题来变化
+
+        self.__initWidget()
+
+    def __initWidget(self):
+
+        # 创建控件
+        self.__createWidget()
+
+        # 设置样式
+        self.__initStyles()
+
+        # 设置布局
+        self.__initLayout()
+
+    def __createWidget(self):
+        # ========== 创建表单控件 ==========
+        # 右侧编辑栏
+        self.target_weight_edit = LineEdit()
+        self.target_weight_edit.setPlaceholderText("目标重量")
+
+        self.current_weight_edit = LineEdit()
+        self.current_weight_edit.setPlaceholderText("当前重量")
+        self.current_weight_edit.setReadOnly(True)  # 只读
+
+        self.error_edit = LineEdit()
+        self.error_edit.setPlaceholderText("误差")
+        self.error_edit.setReadOnly(True)  # 只读
+
+        # ========== 按钮 ==========
+        self.calibrate_btn = PushButton("重量标定")
+        self.confirm_btn = PushButton("确认")
+        self.compensate_btn = PushButton("补称")
+        self.motor_forward_btn = PushButton("电机正转")
+        self.motor_reverse_btn = PushButton("电机反转")
+
+    def __initStyles(self):
+        # 设置按钮大小
+        # 固定大小为 160x46
+        for btn in [
+            self.calibrate_btn,
+            self.confirm_btn,
+            self.compensate_btn,
+            self.motor_forward_btn,
+            self.motor_reverse_btn,
+        ]:
+            btn.setFixedSize(160, 46)  # 固定按钮尺寸
+
+    def __initLayout(self):
+        # ========== 布局设计 ==========
+        # 表单布局（标签+输入框，右对齐）
+        form_layout = QFormLayout()
+        form_layout.addRow(StrongBodyLabel("目标重量："), self.target_weight_edit)
+        form_layout.addRow(StrongBodyLabel("当前重量："), self.current_weight_edit)
+        form_layout.addRow(StrongBodyLabel("误差："), self.error_edit)
+        form_layout.setRowWrapPolicy(QFormLayout.DontWrapRows)  # 禁止换行
+        form_layout.setVerticalSpacing(20)  # 行间距
+        form_layout.setLabelAlignment(Qt.AlignLeft | Qt.AlignVCenter)  # 标签左对齐
+
+        # 用QHBoxLayout 包裹 form_layout，两侧加弹簧
+        form_horizontal_layout = QHBoxLayout()
+        # 左侧弹簧：占据左边多余空间
+        form_horizontal_layout.addItem(
+            QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Minimum)
+        )
+        # 添加表单布局
+        form_horizontal_layout.addLayout(form_layout)
+        # 右侧弹簧：占据右边多余空间
+        form_horizontal_layout.addItem(
+            QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Minimum)
+        )
+
+        # 按钮布局（第一行：重量标定 + 确认；第二行：补称 + 电机正转 + 电机反转）
+        # 第一行按钮布局（中间留空，让按钮居中）
+        btn_row1_layout = QHBoxLayout()
+        btn_row1_layout.addSpacerItem(
+            QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Minimum)
+        )
+        btn_row1_layout.addWidget(self.calibrate_btn)
+        btn_row1_layout.addSpacerItem(
+            QSpacerItem(160, 0, QSizePolicy.Fixed, QSizePolicy.Minimum)
+        )  # 两个按钮之间的间距为160
+        btn_row1_layout.addWidget(self.confirm_btn)
+        btn_row1_layout.addSpacerItem(
+            QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Minimum)
+        )
+
+        # 第二行按钮布局（均匀分布）
+        btn_row2_layout = QHBoxLayout()
+        btn_row2_layout.addWidget(self.compensate_btn)
+        btn_row2_layout.addSpacerItem(
+            QSpacerItem(60, 0, QSizePolicy.Fixed, QSizePolicy.Minimum)
+        )
+        btn_row2_layout.addWidget(self.motor_forward_btn)
+        btn_row2_layout.addSpacerItem(
+            QSpacerItem(60, 0, QSizePolicy.Fixed, QSizePolicy.Minimum)
+        )
+        btn_row2_layout.addWidget(self.motor_reverse_btn)
+        btn_row2_layout.setContentsMargins(0, 0, 0, 0)  # 清除边距
+
+        # 主布局（垂直排列：表单 + 按钮行1 + 按钮行2）
+        main_layout = QVBoxLayout(self)
+        main_layout.addLayout(form_horizontal_layout)
+        main_layout.addSpacing(40)  # 表单与按钮的间距
+        main_layout.addLayout(btn_row1_layout)
+        main_layout.addSpacing(30)  # 两行按钮的间距
+        main_layout.addLayout(btn_row2_layout)
+        main_layout.setContentsMargins(80, 60, 80, 60)  # 窗口内边距
+        # main_layout.setAlignment(Qt.AlignTop | Qt.AlignHCenter)  # 整体上对齐，水平居中
+        main_layout.setAlignment(Qt.AlignVCenter | Qt.AlignHCenter)  # 垂直、水平居中
+
+
+if __name__ == "__main__":
+    import sys
+
+    app = QApplication(sys.argv)
+    # 设置qfluentwidgets全局主题（如浅色主题）
+    from qfluentwidgets import setTheme, Theme
+
+    setTheme(Theme.LIGHT)
+    window = WeightControlUI()
+    window.show()
+    sys.exit(app.exec())