Add tests for Rubella::Weighting::Exponential

spec/spec_helper.rb

@@ -13,3 +13,4 @@ require 'rubella/input/json'
 require 'rubella/weighting/base'
 require 'rubella/weighting/per_count'
 require 'rubella/weighting/per_value'
+require 'rubella/weighting/exponential'

spec/unit/rubella/weighting/exponential/parse_spec.rb

@@ -0,0 +1,49 @@
+require 'spec_helper'
+
+describe Rubella::Weighting::Exponential, '.parse' do
+
+  it "returns a Rubella::Storage object" do
+    input = []
+    # input = Rubella::Input::Base.new [] # Does not work atm FIX IT!
+    weighting = Rubella::Weighting::Exponential.new
+
+    expect(weighting.parse(input)).to be_instance_of(Rubella::Storage)
+  end
+
+  it "splits data in given amount of buckets" do
+    input = [[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]]
+    weighting = Rubella::Weighting::Exponential.new 5
+
+    storage = weighting.parse(input)
+
+    expect(storage.length).to eq(1)
+    expect(storage.dataset_length).to eq(5)
+  end
+
+   it "computes the intensity exponential on the number of cores" do
+    input = [[10, 20, 10, 30], [20, 40, 20, 20], [40, 40, 40, 40]]
+    weighting = Rubella::Weighting::Exponential.new 5
+
+    storage = weighting.parse(input)
+
+    # THINK ABOUT: I'm not sure, if there should be values bigger than 1 ...
+    expect(storage.data[0][0]).to be(0.0)
+    expect(storage.data[0][1]).to be_between(0.45, 0.55).inclusive
+    expect(storage.data[0][2]).to be(0.0)
+    expect(storage.data[0][3]).to be(0.0)
+    expect(storage.data[0][4]).to be(0.0)
+
+    expect(storage.data[1][0]).to be(0.0)
+    expect(storage.data[1][1]).to be >= (1.0)
+    expect(storage.data[1][2]).to be >= (1.0)
+    expect(storage.data[1][3]).to be(0.0)
+    expect(storage.data[1][4]).to be(0.0)
+
+    expect(storage.data[2][0]).to be(0.0)
+    expect(storage.data[2][1]).to be(0.0)
+    expect(storage.data[2][2]).to be >= (1.0)
+    expect(storage.data[2][3]).to be(0.0)
+    expect(storage.data[2][4]).to be(0.0)
+  end
+
+end