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[英]Does running unit test need to run the Main method in the code to be tested?
[英]Using the same code in test method and in the method tested
我是TDD開發的新手,我剛剛開始使用Nunit 3.7.1,Newtonsoft.Json版本= 10.0.3,C#和.NET Framework 4.7進行一些測試。
我創建了此測試以測試json反序列化:
[Test]
public void ShouldGenerateBatchExportFile()
{
string json = @"{""ProductionOrderName"": ""proOrd"",""BatchName"": ""batch_01"",""Codes"": [ --- OMITTED FOR BREVETY --- ]}";
string path = @"d:\trzlexportsample.json";
BatchExportFile exportFile = null;
exportFile = JsonConvert.DeserializeObject<BatchExportFile>(json);
BatchExportFile generatedFile = _import.LoadBatchFile(path);
Assert.AreEqual(generatedFile.ProductionOrderName, exportFile.ProductionOrderName);
Assert.AreEqual(generatedFile.BatchName, exportFile.BatchName);
Assert.That(generatedFile.Codes, Has.Count.EqualTo(exportFile.Codes.Count));
Assert.That(generatedFile.Aggregations, Has.Count.EqualTo(exportFile.Aggregations.Count));
for(int index = 0; index < generatedFile.Codes.Count; index++)
{
CodeData gData = generatedFile.Codes[index];
CodeData testData = exportFile.Codes[index];
Assert.AreEqual(gData.CodeId, testData.CodeId);
Assert.AreEqual(gData.Serial, testData.Serial);
Assert.AreEqual(gData.AggregationLevelId, testData.AggregationLevelId);
Assert.AreEqual(gData.CommissioningFlag, testData.CommissioningFlag);
Assert.AreEqual(gData.LastChange, testData.LastChange);
Assert.AreEqual(gData.UserName, testData.UserName);
Assert.AreEqual(gData.Source, testData.Source);
Assert.AreEqual(gData.Reason, testData.Reason);
}
for (int index = 0; index < generatedFile.Aggregations.Count; index++)
{
AggregationData gData = generatedFile.Aggregations[index];
AggregationData testData = generatedFile.Aggregations[index];
Assert.AreEqual(gData.AggregationId, testData.AggregationId);
Assert.AreEqual(gData.Parent, testData.Parent);
Assert.That(gData.Children, Has.Count.EqualTo(testData.Children.Count));
for (int j = 0; j < gData.Children.Count; j++)
{
AggregationChildrenData gChildren = gData.Children[j];
AggregationChildrenData testChildren = testData.Children[j];
Assert.AreEqual(gChildren.Serial, testChildren.Serial);
Assert.AreEqual(gChildren.Serial, testChildren.Serial);
}
}
}
這是我正在測試的方法:
public BatchExportFile LoadBatchFile(string path)
{
if (string.IsNullOrWhiteSpace(path))
throw new ArgumentNullException(nameof(path));
BatchExportFile exportFile = null;
using (StreamReader file = File.OpenText(path))
{
JsonSerializer serializer = new JsonSerializer();
exportFile = (BatchExportFile)serializer.Deserialize(file, typeof(BatchExportFile));
}
return exportFile;
}
文件D:\\trzlexportsample.json
具有與string json
相同的內容。
我不確定我是否以正確的方式進行測試,因為在測試中,我使用的代碼與_import.LoadBatchFile(path)
方法中使用的代碼大致相同 。
在測試中,我有以下代碼:
exportFile = JsonConvert.DeserializeObject<BatchExportFile>(json);
在測試方法中,我有以下代碼:
using (StreamReader file = File.OpenText(path))
{
JsonSerializer serializer = new JsonSerializer();
exportFile = (BatchExportFile)serializer.Deserialize(file, typeof(BatchExportFile));
}
它們基本相同。
我的方法正確嗎?
換句話說,在測試和測試的方法中使用相同的代碼是否正確?
盡管您使用的是相同的代碼,但是您將其用於不同的目的:
如果您正在測試JSON序列化程序代碼本身,這將是有問題的。 但是,您使用的JSON序列化程序庫值得信賴,可以做正確的事情,因此您的方法是完全可以接受的。
顯然,另一種方法是根本不構造exportFile
,而用常量字符串替換對其成員的引用,例如
Assert.AreEqual(generatedFile.ProductionOrderName, "actual-order-name");
Assert.AreEqual(generatedFile.BatchName, "actual-batch-name");
... // And so on
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