134 lines
4.3 KiB
C#
134 lines
4.3 KiB
C#
using Microsoft.VisualStudio.TestTools.UnitTesting;
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using System;
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using System.Linq;
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namespace Falcon.SugarApi.Test
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{
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/// <summary>
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/// 字符串扩展方法测试
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/// </summary>
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[TestClass]
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public class StringExtendTest
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{
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[TestMethod]
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public void TestSplit() {
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var str = $"a,b.c;d，e。f；g";
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var strArr = str.SplitStr();
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Assert.AreEqual(7,strArr.Length,"分割后长度应该为7");
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str = "a,,, ,b ,c c,";
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strArr = str.SplitStr();
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Assert.AreEqual(3,strArr.Length,"分割后长度应该为3");
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Assert.AreEqual("a",strArr[0]);
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Assert.AreEqual("b",strArr[1]);
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Assert.AreEqual("c c",strArr[2]);
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str = null;
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strArr = str.SplitStr();
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Assert.IsNotNull(strArr);
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Assert.AreEqual(0,strArr.Length);
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//指定分隔符
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str = $"a,b.c;d，e。f；g";
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strArr = str.SplitStr(',');
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Assert.AreEqual(2,strArr.Length,"分割后长度应该为7");
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Assert.AreEqual("a",strArr[0]);
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Assert.AreEqual("b.c;d，e。f；g",strArr[1]);
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strArr = str.SplitStr(',','.');
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Assert.AreEqual(3,strArr.Length,"分割后长度应该为7");
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Assert.AreEqual("a",strArr[0]);
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Assert.AreEqual("b",strArr[1]);
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Assert.AreEqual("c;d，e。f；g",strArr[2]);
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}
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/// <summary>
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/// 测试ToDefault
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/// </summary>
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[TestMethod]
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public void TestToDefault() {
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var str = "";
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var r = "";
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r = str.ToDefault("abc");
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Assert.AreEqual("abc",r);
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str = null;
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r = str.ToDefault("abc");
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Assert.AreEqual("abc",r);
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str = "123";
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r = str.ToDefault("abc");
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Assert.AreEqual("123",r);
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}
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/// <summary>
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/// 检索子字符串测试
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/// </summary>
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[TestMethod]
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public void TestSubstringEx() {
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var str = "abcd33";
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string r;
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r = str.SubstringEx(str.Length + 1,1);
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Assert.IsTrue(r == "");
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r = str.SubstringEx(0,0);
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Assert.IsTrue(r == "");
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r = str.SubstringEx(3,-1);
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Assert.IsTrue(r == "c");
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r = str.SubstringEx(3,10);
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Assert.IsTrue(r == "d33");
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r = str.SubstringEx(-1,2);
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Assert.IsTrue(r == "a");
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r = str.SubstringEx(1,2);
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Assert.IsTrue(r == "bc");
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}
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/// <summary>
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/// 按一定长度分割字符串测试
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/// </summary>
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[TestMethod]
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public void TestSplitByLength() {
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string str;
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string[] result;
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str = "";
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Assert.ThrowsException<ArgumentNullException>(() => { result = str.Split(5).ToArray(); });
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str = "abc";
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Assert.ThrowsException<Exception>(() => { result = str.Split(0).ToArray(); });
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result = str.Split(1).ToArray();
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Assert.IsTrue(result.Length == 3);
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Assert.IsTrue(result[0] == "a");
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Assert.IsTrue(result[1] == "b");
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Assert.IsTrue(result[2] == "c");
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result = str.Split(2).ToArray();
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Assert.IsTrue(result.Length == 2);
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Assert.IsTrue(result[0] == "ab");
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Assert.IsTrue(result[1] == "c");
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result = str.Split(3).ToArray();
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Assert.IsTrue(result.Length == 1);
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Assert.IsTrue(result[0] == "abc");
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result = str.Split(4).ToArray();
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Assert.IsTrue(result.Length == 1);
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Assert.IsTrue(result[0] == "abc");
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}
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/// <summary>
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/// 去除头尾字符
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/// </summary>
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[TestMethod]
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public void TestTrimString() {
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var str = @"abcabcffe222256256";
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//去除头部的abc字符
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var r = str.TrimString("abc");
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Assert.AreEqual(r , "ffe222256256");
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//去除尾部256字符
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r = str.TrimString("","256");
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Assert.AreEqual(r,"abcabcffe222");
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//去除头部abc字符和尾部256字符
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r = str.TrimString("abc","256");
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Assert.AreEqual(r,"ffe222");
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}
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}
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}
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