C# how to mock Configuration.GetSection(“foo:bar”).Get>()

Question

I have a list like following in config.json file `

{
  \"foo\": {
    \"bar\": [
      \"1\",
      \"2\",
      \"3\"
    ]
  }
}`

I am ab

Answer 1

In general, if you have a key/value at the root level and you want to mock this piece of code:

var threshold = _configuration.GetSection("RootLevelValue").Value;

you can do:

var mockIConfigurationSection = new Mock();
mockIConfigurationSection.Setup(x => x.Key).Returns("RootLevelValue");
mockIConfigurationSection.Setup(x => x.Value).Returns("0.15");
_mockIConfiguration.Setup(x => x.GetSection("RootLevelValue")).Returns(mockIConfigurationSection.Object);

If the key/value is not at the root level, and you want to mock a code that is like this one:

var threshold = _configuration.GetSection("RootLevelValue:SecondLevel").Value;

you have to mock Path as well:

var mockIConfigurationSection = new Mock();
mockIConfigurationSection.Setup(x => x.Path).Returns("RootLevelValue");
mockIConfigurationSection.Setup(x => x.Key).Returns("SecondLevel");
mockIConfigurationSection.Setup(x => x.Value).Returns("0.15");

and so on for the third level:

var threshold = _configuration.GetSection("RootLevelValue:SecondLevel:ThirdLevel").Value;

you have to mock Path as well:

var mockIConfigurationSection = new Mock();
mockIConfigurationSection.Setup(x => x.Path).Returns("RootLevelValue:SecondLevel");
mockIConfigurationSection.Setup(x => x.Key).Returns("ThirdLevel");
mockIConfigurationSection.Setup(x => x.Value).Returns("0.15");