EnvironmentAbstractions.TestHelpers

Examples of MockEnvironmentProvider

The EnvironmentAbstractions.TestHelpers provides a helper implementation of IEnvironmentProvider which can be passed to classes to mock access to the environment.

By default, all existing values are set from the current environment.

[Fact] public void MethodReturnsExpectedValue() { IEnvironmentProvider environmentProvider = new MockEnvironmentProvider(); MyClass instance = new MyClass(environmentProvider); string value = instance.Method(); }

To use an instance of the environment without any values already set, specify the useExistingEnvironmentValues parameter to the MockEnvironmentProvider constructor:

[Fact] public void MethodReturnsExpectedValue() { IEnvironmentProvider environmentProvider = new MockEnvironmentProvider(useExistingEnvironmentValues: false); // The only Environment property with a value will be UserName environmentProvider.UserName = "UserA"; }

To use an instance of the environment with existing environment variable values, specify the addExistingEnvironmentVariables parameter to the MockEnvironmentProvider constructor:

[Fact] public void MethodReturnsExpectedValue() { IEnvironmentProvider environmentProvider = new MockEnvironmentProvider(addExistingEnvironmentVariables: true); // All existing environment variables are set but UserName is overidden environmentProvider["UserName"] = "UserA"; }

Examples of MockEnvironmentVariableProvider

The EnvironmentAbstractions.TestHelpers provides a helper implementation of IEnvironmentVariableProvider which can be passed to classes to mock environment variable values.

Use a clean set of environment variables where only what is added is available

[Fact] public void MethodReturnsExpectedValue() { IEnvironmentVariableProvider environmentVariableProvider = new MockEnvironmentVariableProvider { ["Variable1"] = "Value1"; }; MyClass instance = new MyClass(environmentVariableProvider); string value = instance.Method(); }

To make all existing environment variables available, specify the addExistingEnvironmentVariables parameter to the MockEnvironmentVariableProvider constructor:

[Fact] public void MethodReturnsExpectedValue() { IEnvironmentVariableProvider environmentVariableProvider = new MockEnvironmentVariableProvider(addExistingEnvironmentVariables: true); environmentVariableProvider["UserName"] = @"User1"; // Accessing environment variables returns actual values except %UserName% has been changed for just this test }