unit test helper: big revamp (#8894)

* initial commit

* multiple changes:

- TestCaseContext fixture no longer need to autouse=True
- Helper.from_module() allows extra param to specify yaml file
- test_django_check: adjusted .py and .yaml

* set fixtures per testcase

* set fixtures per testcase

* rollback to original state

* patch_ansible_module fixture

- now it works not only in parametrized functions but also directly with args

* tests/unit/plugins/modules/helper.py

- improved encapsulation, class Helper no longer knows details about test cases
- test functions no longer parametrized, that allows using test case fixtures per test function
- renamed 'context' to 'mock'

* enable Helper.from_list(), better param name 'ansible_module'

* adjusted test fiels to new helper

* remove unnecessary .license file

* fix bracket

* fix reference name

* Update tests/unit/plugins/modules/helper.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* revert to parametrized test func instead of multiple funcs

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/unit/plugins/modules/test_xfconf.yaml

@@ -21,7 +21,8 @@
     previous_value: '100'
     type: int
     value: '90'
-  run_command_calls:
+  mocks:
+    run_command:
     - command: [/testbin/xfconf-query, --channel, xfwm4, --property, /general/inactive_opacity]
       environ: &env-def {environ_update: {LANGUAGE: C, LC_ALL: C}, check_rc: false}
       rc: 0
@@ -44,7 +45,8 @@
     previous_value: '90'
     type: int
     value: '90'
-  run_command_calls:
+  mocks:
+    run_command:
     - command: [/testbin/xfconf-query, --channel, xfwm4, --property, /general/inactive_opacity]
       environ: *env-def
       rc: 0
@@ -61,13 +63,14 @@
     property: /general/SaveOnExit
     state: present
     value_type: bool
-    value: False
+    value: false
   output:
     changed: true
     previous_value: 'true'
     type: bool
     value: 'False'
-  run_command_calls:
+  mocks:
+    run_command:
     - command: [/testbin/xfconf-query, --channel, xfce4-session, --property, /general/SaveOnExit]
       environ: *env-def
       rc: 0
@@ -90,32 +93,33 @@
     previous_value: [Main, Work, Tmp]
     type: [string, string, string]
     value: [A, B, C]
-  run_command_calls:
+  mocks:
+    run_command:
     - command: [/testbin/xfconf-query, --channel, xfwm4, --property, /general/workspace_names]
       environ: *env-def
       rc: 0
       out: "Value is an array with 3 items:\n\nMain\nWork\nTmp\n"
       err: ""
     - command:
-        - /testbin/xfconf-query
-        - --channel
-        - xfwm4
-        - --property
-        - /general/workspace_names
-        - --create
-        - --force-array
-        - --type
-        - string
-        - --set
-        - A
-        - --type
-        - string
-        - --set
-        - B
-        - --type
-        - string
-        - --set
-        - C
+      - /testbin/xfconf-query
+      - --channel
+      - xfwm4
+      - --property
+      - /general/workspace_names
+      - --create
+      - --force-array
+      - --type
+      - string
+      - --set
+      - A
+      - --type
+      - string
+      - --set
+      - B
+      - --type
+      - string
+      - --set
+      - C
       environ: *env-def
       rc: 0
       out: ""
@@ -132,32 +136,33 @@
     previous_value: [A, B, C]
     type: [string, string, string]
     value: [A, B, C]
-  run_command_calls:
+  mocks:
+    run_command:
     - command: [/testbin/xfconf-query, --channel, xfwm4, --property, /general/workspace_names]
       environ: *env-def
       rc: 0
       out: "Value is an array with 3 items:\n\nA\nB\nC\n"
       err: ""
     - command:
-        - /testbin/xfconf-query
-        - --channel
-        - xfwm4
-        - --property
-        - /general/workspace_names
-        - --create
-        - --force-array
-        - --type
-        - string
-        - --set
-        - A
-        - --type
-        - string
-        - --set
-        - B
-        - --type
-        - string
-        - --set
-        - C
+      - /testbin/xfconf-query
+      - --channel
+      - xfwm4
+      - --property
+      - /general/workspace_names
+      - --create
+      - --force-array
+      - --type
+      - string
+      - --set
+      - A
+      - --type
+      - string
+      - --set
+      - B
+      - --type
+      - string
+      - --set
+      - C
       environ: *env-def
       rc: 0
       out: ""
@@ -170,9 +175,10 @@
   output:
     changed: true
     previous_value: [A, B, C]
-    type: null
-    value: null
-  run_command_calls:
+    type:
+    value:
+  mocks:
+    run_command:
     - command: [/testbin/xfconf-query, --channel, xfwm4, --property, /general/workspace_names]
       environ: *env-def
       rc: 0