"""Tests for the skeleton module."""
from config_skeleton import merge


def test_merge_empty():
    """Test correct response for an empty merge."""
    assert merge() == {}


def test_merge_single():
    """Test merge command with a single input."""
    assert merge({}) == {}

    dic = {"test": "value", "test2": "value2"}

    assert merge(dic) == dic


def test_merge_double_no_overlap():
    """Test merge command with two non-overlapping inputs."""
    d1 = {"test": "value", "test2": "value2"}
    d2 = {"test3": "value3"}
    d_res = {"test": "value", "test2": "value2", "test3": "value3"}

    assert merge(d1, d2) == d_res


def test_merge_double_overlap():
    """Test merge command with two overlapping inputs."""
    d1 = {"test": "value", "test2": "value2"}
    d2 = {"test2": "value3"}
    d_res = {"test": "value", "test2": "value3"}

    assert merge(d1, d2) == d_res


def test_merge_triple_no_overlap():
    """Test merge command with three non-overlapping inputs.

    This test tells us that the recursion works.
    """
    d1 = {"test": "value", "test2": "value2"}
    d2 = {"test3": "value3"}
    d3 = {"test4": "value4"}
    d_res = {
        "test": "value",
        "test2": "value2",
        "test3": "value3",
        "test4": "value4",
    }

    assert merge(d1, d2, d3) == d_res


def test_merge_triple_overlap():
    """Test merge command with three overlapping inputs.

    This test tells us that the recursion works.
    """
    d1 = {"test": "value", "test2": "value2"}
    d2 = {"test3": "value3"}
    d3 = {"test2": "value4"}
    d_res = {
        "test": "value",
        "test2": "value4",
        "test3": "value3",
    }

    assert merge(d1, d2, d3) == d_res