.NET Core之单元测试(三):Mock框架Moq的使用
江浙沪柯蓝 人气:0编写一个API
新增一个接口
public interface IFoo
{
bool Ping(string ip);
}
接口实现
public class Foo : IFoo
{
public bool Ping(string ip)
{
return new Random().Next(1, 100) % 2 == 1;
}
}
编写一个待测试的API,其中有三个依赖项:SqliteDbContext
,ILogger<SampleController>
和IFoo
API实现的功能:先获取SqliteDbContext中的SampleEntity,如果其中的属性StringValue值为ping,并且结果为False,则返回404
,否则返回SampleEntity
[Route("api/[controller]")]
[ApiController]
public class SampleController : ControllerBase
{
private readonly SqliteDbContext _sqliteDbContext;
private readonly ILogger<SampleController> _logger;
private readonly IFoo _foo;
public SampleController(SqliteDbContext sqliteDbContext, ILogger<SampleController> logger,IFoo foo)
{
_logger = logger;
_sqliteDbContext = sqliteDbContext;
}
public async Task<IActionResult> Get(int id)
{
var sampleData = await _sqliteDbContext.SampleEntity
.SingleOrDefaultAsync(s => s.Id == id);
if (sampleData.StringValue == "ping")
{
var pingOk = _foo.Ping("localhost");
if (!pingOk)
return NotFound();
}
return Ok(sampleData);
}
}
测试用例
- Mock
ILogger<SampleController>
var loggerMock = new Mock<ILogger<SampleController>>();
var logger = loggerMock.Object;
- Mock
Ping(string ip)
var fooMock = new Mock<IFoo>();
fooMock.Setup(foo => foo.Ping("localhost")).Returns(true);
var foo = fooMock.Object;
关于
Moq
的更多操作可参见:Moq4 Quickstart
- 修改
GetSqliteDbContextAsync()
,新增一个ID为2的数据记录
private async Task<SqliteDbContext> GetSqliteDbContextAsync()
{
var options = new DbContextOptionsBuilder<SqliteDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString())
.Options;
var sqliteDbContext = new SqliteDbContext(options);
sqliteDbContext.SampleEntity.Add(new Infrastructure.Entities.SampleEntity
{
Id = 1,
BoolValue = false,
DateTimeValue = DateTime.Now,
StringValue = "sample"
});
sqliteDbContext.SampleEntity.Add(new Infrastructure.Entities.SampleEntity
{
Id = 2,
BoolValue = false,
DateTimeValue = DateTime.Now,
StringValue = "ping"
});
await sqliteDbContext.SaveChangesAsync();
return sqliteDbContext;
}
- 测试
Ping==True
[TestMethod]
public async Task Get_ReturnOK_WithPingTrue()
{
// Arrange
var dbContext = await GetSqliteDbContextAsync();
var loggerMock = new Mock<ILogger<SampleController>>();
var logger = loggerMock.Object;
var fooMock = new Mock<IFoo>();
fooMock.Setup(foo => foo.Ping("localhost")).Returns(true);
var foo = fooMock.Object;
var controller = new SampleController(dbContext, logger, foo);
// Act
var response = await controller.Get(2);
var responseModel = ((OkObjectResult)response).Value as SampleEntity;
// Assert
Assert.IsInstanceOfType(response, typeof(OkObjectResult));
Assert.IsTrue(responseModel.Id == 2);
Assert.IsFalse(responseModel.BoolValue);
Assert.IsTrue(responseModel.StringValue == "ping");
}
- 测试
Ping==False
[TestMethod]
public async Task Get_ReturnOK_WithPingFalse()
{
// Arrange
var dbContext = await GetSqliteDbContextAsync();
var loggerMock = new Mock<ILogger<SampleController>>();
var logger = loggerMock.Object;
var fooMock = new Mock<IFoo>();
fooMock.Setup(foo => foo.Ping("localhost")).Returns(false);
var foo = fooMock.Object;
var controller = new SampleController(dbContext, logger, foo);
// Act
var response = await controller.Get(2);
// Assert
Assert.IsInstanceOfType(response, typeof(NotFoundResult));
}
- 测试结果
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