1..7
# ->parseYamls()
# ->parseYaml()
# ->mergeConfigValue()
ok 1 - ->mergeConfigValue() merges values for a given key under a given category
ok 2 - ->mergeConfigValue() merges values for a given key under a given category
ok 3 - ->mergeConfigValue() merges values for a given key under a given category
# ->getConfigValue()
ok 4 - ->getConfigValue() returns the value for the key in the given category
ok 5 - ->getConfigValue() returns the value for the key in the given category
ok 6 - ->getConfigValue() returns the value for the key in the all category if the key does not exist in the given category
ok 7 - ->getConfigValue() returns the default value if key is not found in the category and in the all category
# Looks like everything went fine.