CLDC-1543 Route to mortgage questions only if mortgage is used (#1179)

* Route to mortagage questions only if mortgage is used

* Fix tests for deposit derived var

* more routing

* Only display mortgage lender questions if mortgage is used

app/models/form/sales/pages/about_deposit_without_discount.rb

@@ -2,7 +2,9 @@ class Form::Sales::Pages::AboutDepositWithoutDiscount < ::Form::Page
   def initialize(id, hsh, subsection)
     super
     @header = "About the deposit"
-    @depends_on = [{ "is_type_discount?" => false }]
+    @depends_on = [{ "is_type_discount?" => false, "ownershipsch" => 1 },
+                   { "ownershipsch" => 2 },
+                   { "ownershipsch" => 3, "mortgageused" => 1 }]
   end
 
   def questions

app/models/form/sales/pages/mortgage_lender.rb

@@ -4,6 +4,9 @@ class Form::Sales::Pages::MortgageLender < ::Form::Page
     @header = ""
     @description = ""
     @subsection = subsection
+    @depends_on = [{
+      "mortgageused" => 1,
+    }]
   end
 
   def questions

app/models/form/sales/pages/mortgage_length.rb

@@ -1,4 +1,11 @@
 class Form::Sales::Pages::MortgageLength < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @depends_on = [{
+      "mortgageused" => 1,
+    }]
+  end
+
   def questions
     @questions ||= [
       Form::Sales::Questions::MortgageLength.new(nil, nil, self),

app/models/form/sales/questions/deposit_amount.rb

@@ -9,5 +9,10 @@ class Form::Sales::Questions::DepositAmount < ::Form::Question
     @width = 5
     @prefix = "£"
     @hint_text = "Enter the total cash sum paid by the buyer towards the property that was not funded by the mortgage"
+    @derived = true
+  end
+
+  def selected_answer_option_is_derived?(_log)
+    true
   end
 end

spec/models/form/sales/pages/about_deposit_without_discount_spec.rb

@@ -29,7 +29,9 @@ RSpec.describe Form::Sales::Pages::AboutDepositWithoutDiscount, type: :model do
 
   it "has correct depends_on" do
     expect(page.depends_on).to eq(
-      [{ "is_type_discount?" => false }],
+      [{ "is_type_discount?" => false, "ownershipsch" => 1 },
+       { "ownershipsch" => 2 },
+       { "ownershipsch" => 3, "mortgageused" => 1 }],
     )
   end
 end

spec/models/form/sales/pages/mortgage_lender_spec.rb

@@ -28,6 +28,8 @@ RSpec.describe Form::Sales::Pages::MortgageLender, type: :model do
   end
 
   it "has correct depends_on" do
-    expect(page.depends_on).to be_nil
+    expect(page.depends_on).to eq([{
+      "mortgageused" => 1,
+    }])
   end
 end

spec/models/form/sales/pages/mortgage_length_spec.rb

@@ -28,6 +28,8 @@ RSpec.describe Form::Sales::Pages::MortgageLength, type: :model do
   end
 
   it "has correct depends_on" do
-    expect(page.depends_on).to be_nil
+    expect(page.depends_on).to eq([{
+      "mortgageused" => 1,
+    }])
   end
 end

spec/models/form/sales/questions/deposit_amount_spec.rb

@@ -27,8 +27,8 @@ RSpec.describe Form::Sales::Questions::DepositAmount, type: :model do
     expect(question.type).to eq("numeric")
   end
 
-  it "is not marked as derived" do
-    expect(question.derived?).to be false
+  it "is marked as derived" do
+    expect(question.derived?).to be true
   end
 
   it "has the correct hint" do