《软件测试技术》课程第二周随笔

这次的博客内容为，举例解释等价类划分。

1. 问题描述

EditBox

在文本输入框内输入文字，然后按确认键。

允许接收的文字为：1至6个英文字符或数字。

2.等价类划分

	有效等价类	编号	无效等价类	编号
包括的字符	a-z,A-Z,0-9	1	其他字符	3
字符串长度	1-6	2	0	4
			大于6	5

3.测试用例

编号	输入	覆盖等价类	预期输出
Test1	a	1,2	Accepted
Test2	A	1,2	Accepted
Test3	0	1,2	Accepted
Test4	abAB01	1,2	Accepted
Test5		4	Please try again.
Test6	abcdefg	5	Please try again.
Test7	@	3	Please try again.
Test8	a b	3	Please try again.
Test9	ab_cd	3	Please try again.

4.代码实现及结果样例

使用C#编写，具体代码如下。

这是C#自动生成的，描述GUI的Form1.Designer.cs的代码：

namespace csharptest
{partial class Form1{/// <summary>/// 必需的设计器变量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary>/// 清理所有正在使用的资源。/// </summary>/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows 窗体设计器生成的代码/// <summary>/// 设计器支持所需的方法 - 不要/// 使用代码编辑器修改此方法的内容。/// </summary>private void InitializeComponent(){this.textBox1 = new System.Windows.Forms.TextBox();this.label1 = new System.Windows.Forms.Label();this.button1 = new System.Windows.Forms.Button();this.SuspendLayout();// // textBox1// this.textBox1.Location = new System.Drawing.Point(24, 49);this.textBox1.Name = "textBox1";this.textBox1.Size = new System.Drawing.Size(185, 21);this.textBox1.TabIndex = 0;// // label1// this.label1.AutoSize = true;this.label1.Location = new System.Drawing.Point(51, 19);this.label1.Name = "label1";this.label1.Size = new System.Drawing.Size(131, 12);this.label1.TabIndex = 1;this.label1.Text = "请输入0~6个字母或数字";// // button1// this.button1.Location = new System.Drawing.Point(72, 85);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(75, 23);this.button1.TabIndex = 2;this.button1.Text = "确认";this.button1.UseVisualStyleBackColor = true;this.button1.Click += new System.EventHandler(this.button1_Click);// // Form1// this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(227, 124);this.Controls.Add(this.button1);this.Controls.Add(this.label1);this.Controls.Add(this.textBox1);this.Name = "Form1";this.Text = "EditBox";this.ResumeLayout(false);this.PerformLayout();}#endregionprivate System.Windows.Forms.TextBox textBox1;private System.Windows.Forms.Label label1;private System.Windows.Forms.Button button1;}
}

这是其他代码，有关于判断字符串是否合法的部分，文件名为Form1.cs：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace csharptest
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private bool check(String text){if (text.Length <= 0) return false;if (text.Length > 6) return false;for (int i = 0; i < text.Length; i++){char c = text[i];if ((c < 'a' || c > 'z') && (c < 'A' || c > 'Z') && (c < '0' || c > '9'))return false;}return true;}private void button1_Click(object sender, EventArgs e){if (check(textBox1.Text))MessageBox.Show("Accepted");elseMessageBox.Show("Please try again.");}}
}