Code Generation in
C#.net – T4Template in Visual Studio
Problem Statement:
Need to create more number of *.cs file with [TestClass]
and [TestMethod]
Mostly the code remains constant. Only few parameters
changes.
Consider creating and testing [TestClass] and
[TestMethod] to be written for all Continents, Countries, and States.
Solution:
Using a template to generate *.cs files with static code
and only substituting the lookup values for all Continents, Countries, and
States.
1. Create a class to hold configurable values
// Holds the single record with all values
public partial class TestRecord
{
public string Regulationstate { get; set; }
public string Authorityname { get; set; }
public int rulecount { get; set; }
public string Conti { get; set; }
public string Country { get; set; }
public string State { get; set; }
private string mname;
public String Methodname
{
get { return
mname; }
set { mname = String.Concat(Regulationstate, Authorityname, Conti, Country, State,
Methodname, "()"); }
}
public TestRecord(string regulationstate, string authorityname, string conti, string country, string state)
{
Conti = conti;
Country = country;
State = state;
Methodname = String.Concat(Conti, Country, State,
Methodname, "()");
Regulationstate = regulationstate;
Authorityname = authorityname;
}
}
2. To hold the collection of TestRecord
//COllection of TestRecord List
partial class TestRecordList : IEnumerable
{
public List<TestRecord> mdt { get; set; }
public TestRecordList()
{
this.mdt = FillTestList().ToList<TestRecord>();
}
public IEnumerable<TestRecord>
FillTestList()
{
List<TestRecord>
testlist = new List<TestRecord>
{
new TestRecord("Asiacode","SoutEast","asia_test","india_test","tamilnadu_test"),
new TestRecord("Asiacode","SoutEast","assd_ia","srilanfd_ka","codf_lombo"),
new TestRecord("Asiacode","SoutEast","asia","pakistadf_n","Islamabdf_ad"),
new TestRecord("UKcode","London","asiad_d","pakisdf_tan","Islamafd_bad"),
new TestRecord("UKcode","Licester","asDD_ia","paDF_kistan","Islafdf_mabad"),
new TestRecord("USAcode","sss","asiDD_a","pakistan","Islamafd_bad"),
};
return testlist;
}
public IEnumerator GetEnumerator()
{
return this.GetEnumerator();
}
}
2. Create a new file
RuntimeTempalte(*.tt) file using Add item to project in VS2013
3. Kindly note the Name of the *.tt
template is TestRecordList (same as
class) and marked as partial class
<#@ template language="C#" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Text" #>
<#@ import namespace="System.Collections.Generic"
#>
<#@ output extension=".cs" #>
<#@ import namespace="System.Xml" #>
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
<# var ite =
mdt.Select(x => x.Regulationstate).Distinct().ToList();#>
<#foreach(var i in ite)
{#>
[TestClass]
public class
<#= i #> {
<# foreach(TestRecord item in mdt)
{
if(item.Regulationstate ==i)
{#>
[TestMethod]
public void <#=item.Methodname#>
{
//select top 1000
//from Dataworks
//where
// statecode =
"<#=item.Regulationstate#>";
//caption1= "<#=item.Conti#>";
//and caption2= "<#=item.Country#>";
//and caption3= "<#=item.State#>";
string caption1= "<#=item.Conti#>";
string caption2= "<#=item.Country#>";
string caption3= "<#=item.State#>";
}
<#}#>
<#}#>
}
<#}#>
4. Write a small Console Application
to Generate and export to test.cs within
the project.
class Program
{
static void Main(string[] args)
{
TestRecordList ts = new TestRecordList();
string content = ts.TransformText();
string path = @"..\..\Op\test.cs";
System.IO.File.WriteAllText(path, content);
}
}
5.
Output file generated is below
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
[TestClass]
public class Asiacode
{
[TestMethod]
public void asia_testindia_testtamilnadu_test()
{
//select top 1000
//from Dataworks
//where
// statecode =
"Asiacode";
//caption1= "asia_test";
//and caption2= "india_test";
//and caption3=
"tamilnadu_test";
string caption1 = "asia_test";
string caption2 = "india_test";
string caption3 = "tamilnadu_test";
}
[TestMethod]
public void asiasrilankacolombo()
{
//select top 1000
//from Dataworks
//where
// statecode =
"Asiacode";
//caption1= "asia";
//and caption2=
"srilanka";
//and caption3=
"colombo";
string caption1 = "asia";
string caption2 = "srilanka";
string caption3 = "colombo";
}
[TestMethod]
public void asiapakistanIslamabad()
{
//select top 1000
//from Dataworks
//where
// statecode =
"Asiacode";
//caption1= "asia";
//and caption2= "pakistan";
//and caption3=
"Islamabad";
string caption1 = "asia";
string caption2 = "pakistan";
string caption3 = "Islamabad";
}
}
[TestClass]
public class UKcode
{
[TestMethod]
public void asiapakistanIslamabad()
{
//select top 1000
//from Dataworks
//where
// statecode = "UKcode";
//caption1= "asia";
//and caption2=
"pakistan";
//and caption3=
"Islamabad";
string caption1 = "asia";
string caption2 = "pakistan";
string caption3 = "Islamabad";
}
[TestMethod]
public void asiapakistanIslamabad()
{
//select top 1000
//from Dataworks
//where
// statecode = "UKcode";
//caption1= "asia";
//and caption2=
"pakistan";
//and caption3=
"Islamabad";
string caption1 = "asia";
string caption2 = "pakistan";
string caption3 = "Islamabad";
}
}
[TestClass]
public class USAcode
{
[TestMethod]
public void asiapakistanIslamabad()
{
//select top 1000
//from Dataworks
//where
// statecode =
"USAcode";
//caption1= "asia";
//and caption2=
"pakistan";
//and caption3=
"Islamabad";
string caption1 = "asia";
string caption2 = "pakistan";
string caption3 = "Islamabad";
}
}
