Test cases for the statement in configsources.asciidoc#default_configsources.env.mapping
Prerequisite: The following environment variables must be set prior to running this test: "my_int_property" with the
value of "45" "MY_BOOLEAN_PROPERTY" with the value of "true" "my_string_property" with the value of "haha"
"MY_STRING_PROPERTY" with the value of "woohoo"
A bean supporting the MissingValueOnObserverMethodInjectionTest test that injects a non-existent
configuration property in a container lifecycle event observer method.
A test to verify that a ConfigProperty-annotated injection point in an
observer method with a payload that is not an instance of Optional that does not have a
corresponding configuration property value set will cause a DeploymentException to be thrown.