spec/exponential_spec.rb in distribution-0.7.3 vs spec/exponential_spec.rb in distribution-0.8.0

@@ -1,94 +1,89 @@
-require File.expand_path(File.dirname(__FILE__)+"/spec_helper.rb")
-  
+require File.expand_path(File.dirname(__FILE__) + '/spec_helper.rb')
+
 describe Distribution::Exponential do
-  
-  shared_examples_for "exponential engine" do
-    it "should return correct pdf" do
+  shared_examples_for 'exponential engine' do
+    it 'should return correct pdf' do
       if @engine.respond_to? :pdf
-        [0.5,1,1.5].each {|l|
+        [0.5, 1, 1.5].each {|l|
           1.upto(5) {|x|
-            @engine.pdf(x,l).should be_within(1e-10).of(l*Math.exp(-l*x))
+            expect(@engine.pdf(x, l)).to be_within(1e-10).of(l * Math.exp(-l * x))
           }
         }
       else
         pending("No #{@engine}.pdf")
       end
     end
-    
-    it "should return correct cdf" do
+
+    it 'should return correct cdf' do
       if @engine.respond_to? :cdf
-        [0.5,1,1.5].each {|l|
+        [0.5, 1, 1.5].each {|l|
           1.upto(5) {|x|
-            @engine.cdf(x,l).should be_within(1e-10).of(1-Math.exp(-l*x))
+            expect(@engine.cdf(x, l)).to be_within(1e-10).of(1 - Math.exp(-l * x))
           }
         }
       else
         pending("No #{@engine}.cdf")
       end
     end
-  
-    
-    it "should return correct p_value" do
+
+    it 'should return correct p_value' do
       if @engine.respond_to? :p_value
-        [0.5,1,1.5].each {|l|
+        [0.5, 1, 1.5].each {|l|
           1.upto(5) {|x|
-            pr=@engine.cdf(x,l)
-            @engine.p_value(pr,l).should be_within(1e-10).of(x)
+            pr = @engine.cdf(x, l)
+            expect(@engine.p_value(pr, l)).to be_within(1e-10).of(x)
           }
         }
       else
         pending("No #{@engine}.p_value")
       end
     end
   end
-  
 
-  describe "singleton" do
+  describe 'singleton' do
     before do
-      @engine=Distribution::Exponential
+      @engine = Distribution::Exponential
     end
-    it_should_behave_like "exponential engine"
+    it_should_behave_like 'exponential engine'
   end
-  
+
   describe Distribution::Exponential::Ruby_ do
     before do
-      @engine=Distribution::Exponential::Ruby_
+      @engine = Distribution::Exponential::Ruby_
     end
-    it_should_behave_like "exponential engine"
-    
+    it_should_behave_like 'exponential engine'
   end
-    
+
   if Distribution.has_gsl?
     describe Distribution::Exponential::GSL_ do
       before do
-        @engine=Distribution::Exponential::GSL_
+        @engine = Distribution::Exponential::GSL_
       end
-    it_should_behave_like "exponential engine"
+      it_should_behave_like 'exponential engine'
     end
   end
-  
-#  if Distribution.has_java?
-#    describe Distribution::Exponential::Java_ do
-#      before do
-#        @engine=Distribution::Exponential::Java_
-#      end
-#    it_should_behave_like "exponential engine"
-#    
-#    end  
-#  end
-  describe "rng" do
-    it "should default to Kernel#rand if no :random is given" do
-      Random.stub(:rand)
-      Random.should_receive(:rand).and_return(0.5)
+
+  #  if Distribution.has_java?
+  #    describe Distribution::Exponential::Java_ do
+  #      before do
+  #        @engine=Distribution::Exponential::Java_
+  #      end
+  #    it_should_behave_like "exponential engine"
+  #
+  #    end
+  #  end
+  describe 'rng' do
+    it 'should default to Kernel#rand if no :random is given' do
+      allow(Random).to receive(:rand).and_return(0.5)
       rng = Distribution::Exponential.rng 1.0
-      rng.call()
+      rng.call
     end
 
-    it "should use a given rng if one is passed during construction" do
-      random = double("random")
-      random.should_receive(:rand).and_return(0.5)
-      rng = Distribution::Exponential::rng 1.0, :random => random
-      rng.call()
+    it 'should use a given rng if one is passed during construction' do
+      random = double('random')
+      allow(random).to receive(:rand).and_return(0.5)
+      rng = Distribution::Exponential.rng 1.0, random: random
+      rng.call
     end
-  end  
+  end
 end