Added test cases for TV Licence (#794)

* Update LBTT rate increase for non-primary residences

* Fix SDLT description

* Add documention for LTT and LBTT

* Change the legend in graphs

* Added test cases for TV Licence

---------

Co-authored-by: Nikhil Woodruff <[email protected]>

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    added:
+    - Test cases for TV Licence.

policyengine_uk/tests/policy/baseline/gov/dcms/bbc/tv-licence/tv_licence.yaml

@@ -0,0 +1,20 @@
+- name: TV Licence full price - ineligible for aged or blind discount.
+  period: 2023
+  input:
+    tv_licence_discount: 0
+  output:
+    tv_licence: 159.00
+
+- name: TV Licence half price - eligible for blind discount but not aged.
+  period: 2023
+  input:
+    tv_licence_discount: 0.5
+  output:
+    tv_licence: 79.50
+
+- name: Free TV Licence - eligible for aged discount.
+  period: 2023
+  input:
+    tv_licence_discount: 1
+  output:
+    tv_licence: 0

policyengine_uk/tests/policy/baseline/gov/dcms/bbc/tv_licence_discount.yaml

@@ -0,0 +1,44 @@
+- name: Ineligible for any discount.
+  period: 2023
+  input:
+    age: 74
+    pension_credit: 0
+    is_blind: false
+  output:
+    tv_licence_discount: 0
+
+- name: Eligible for aged discount only.
+  period: 2023
+  input:
+    age: 75
+    pension_credit: 1
+    is_blind: false
+  output:
+    tv_licence_discount: 1
+
+- name: Aged over 75 but ineligible for aged discount.
+  period: 2023
+  input:
+    age: 75
+    pension_credit: 0
+    is_blind: false
+  output:
+    tv_licence_discount: 0
+
+- name: Eligible for blind discount only.
+  period: 2023
+  input:
+    age: 74
+    pension_credit: 0
+    is_blind: true
+  output:
+    tv_licence_discount: 0.5
+
+- name: Eligible for both aged and blind discounts.
+  period: 2023
+  input:
+    age: 75
+    pension_credit: 1
+    is_blind: true
+  output:
+    tv_licence_discount: 1