This pull request introduces comprehensive unit tests across multiple packages to ensure functionality and reliability of YAML/JSON marshaling, provider interfaces, dependency resolution, dry-run validations, and container runtime templates. The changes focus on improving test coverage and validating different configurations and edge cases.

Testing for YAML/JSON marshaling and unmarshaling:

• Added tests in pkg/jyaml/jyaml_test.go to validate MarshalJSON, MarshalJSONIndent, MarshalYAML, Unmarshal, UnmarshalStrict, and UnmarshalFromFile functions, including scenarios with invalid data and strict mode validation.

Mocking and testing provider interfaces:

• Introduced MockProvider in pkg/provider/provider_test.go to test the Provider interface, including methods like Create, Delete, DryRun, Status, and UpdateResourcesTags. Added test cases for both successful and error scenarios.

Dependency resolution testing:

• Implemented tests in pkg/provisioner/dependency_test.go for NewDependencies and its methods (withKubernetes, withContainerRuntime, etc.), as well as the Resolve method to validate dependency resolution logic.

Dry-run validation:

• Added dry-run tests in pkg/provisioner/dryrun_test.go to validate configurations for Kubernetes versions and container runtimes, including both valid and invalid scenarios.

Container runtime template testing:

• pkg/provisioner/templates/container-toolkit_test.go: Added tests for NewContainerToolkit and its Execute method to validate default and custom configurations.
• pkg/provisioner/templates/containerd_test.go: Added tests for NewContainerd and its Execute method, ensuring correct version handling and configuration commands.
• pkg/provisioner/templates/crio_test.go: Added tests for NewCriO and its Execute method to validate CRI-O installation and service start commands.
• pkg/provisioner/templates/docker_test.go: Added tests for NewDocker and its Execute method to validate Docker versioning and service enablement.