Remove object parsing in TimeSeries::Value

We're only every passing hashes

app/models/time_series.rb

@@ -49,8 +49,8 @@ class TimeSeries
   private
     def initialize_values(data)
       [ nil, *data ].each_cons(2).map do |previous, current|
-        TimeSeries::Value.new current,
-          previous: (TimeSeries::Value.new(previous) if previous),
+        TimeSeries::Value.new **current,
+          previous_value: previous.try(:[], :value),
           series: self
       end
     end

app/models/time_series/value.rb

@@ -7,10 +7,9 @@ class TimeSeries::Value
   validates :date, presence: true
   validate :value_must_be_of_known_type
 
-  def initialize(obj, series: nil, previous: nil)
-    @date, @value, @original = parse_object obj
-    @series = series
-    @trend = create_trend previous
+  def initialize(date:, value:, original: nil, series: nil, previous_value: nil)
+    @date, @value, @original, @series = date, value, original, series
+    @trend = create_trend previous_value
 
     validate!
   end
@@ -32,24 +31,10 @@ class TimeSeries::Value
   private
     attr_reader :series
 
-    def parse_object(obj)
-      if obj.is_a?(Hash)
-        date = obj[:date]
-        value = obj[:value]
-        original = obj.fetch(:original, obj)
-      else
-        date = obj.date
-        value = obj.value
-        original = obj
-      end
-
-      [ date, value, original ]
-    end
-
-    def create_trend(previous)
+    def create_trend(previous_value)
       TimeSeries::Trend.new \
         current: value,
-        previous: previous&.value,
+        previous: previous_value,
         series: series
     end
 

test/models/family_test.rb

@@ -73,9 +73,9 @@ class FamilyTest < ActiveSupport::TestCase
     assert_equal @expected_snapshots.count, net_worth_series.values.count
 
     @expected_snapshots.each_with_index do |row, index|
-      expected_assets = TimeSeries::Value.new({ date: row["date"], value: Money.new(row["assets"].to_d) })
-      expected_liabilities = TimeSeries::Value.new({ date: row["date"], value: Money.new(row["liabilities"].to_d) })
-      expected_net_worth = TimeSeries::Value.new({ date: row["date"], value: Money.new(row["net_worth"].to_d) })
+      expected_assets = TimeSeries::Value.new(date: row["date"], value: Money.new(row["assets"].to_d))
+      expected_liabilities = TimeSeries::Value.new(date: row["date"], value: Money.new(row["liabilities"].to_d))
+      expected_net_worth = TimeSeries::Value.new(date: row["date"], value: Money.new(row["net_worth"].to_d))
 
       assert_in_delta expected_assets.value.amount, Money.new(asset_series.values[index].value).amount, 0.01
       assert_in_delta expected_liabilities.value.amount, Money.new(liability_series.values[index].value).amount, 0.01