line_spec.rb in rubyvis-0.4.0

- old
+ new
@@ -1,9 +1,127 @@
 require File.expand_path(File.dirname(__FILE__)+"/spec_helper.rb")
 describe Rubyvis::Line do
+  include Rubyvis::GeneralSpec
   it "should have correct properties" do
     props=[:antialias, :bottom, :cursor, :data, :eccentricity, :events, :fill_style, :id, :interpolate, :left, :line_join, :line_width, :reverse, :right, :segmented, :stroke_style, :tension, :title, :top, :visible].inject({}) {|ac, v| ac[v]=true; ac}
     Rubyvis::Line.properties.should==props
+  end
+  it "should render correctly 'line_interpolation.html' example" do
+    data = pv.range(0, 10, 0.2).map {|x|
+    OpenStruct.new({:x=>x, :y=>Math.sin(x) + 2})}
+      
+      p_w=200
+      p_h=150
+      w = 20+p_w*2
+      h = 20+p_h*4
+      
+      p_w=200
+      p_h=150
+      #p data
+      w = 20+p_w*2
+      h = 20+p_h*4
+      
+      x = pv.Scale.linear(data, lambda {|d| d.x}).range(0, p_w-30)
+      
+      
+      y = pv.Scale.linear(data, lambda {|d| d.y}).range(0, p_h-20);
+      
+      interpolations=["linear","step-before","step-after","polar","polar-reverse", "basis", "cardinal"]
+      
+      #/* The root panel. */
+      vis = pv.Panel.new()
+      .width(w)
+      .height(h)
+      .bottom(20)
+      .left(20)
+      .right(10)
+      .top(5)
+      
+      interpolations.each_with_index do |inter,i|
+      n=i%2
+      m=(i/2).floor
+      panel=vis.add(Rubyvis::Panel).
+      left(n*(p_w+10)).
+      top(m*(p_h+10)).
+      width(p_w).
+      height(p_h)
+      panel.anchor('top').add(Rubyvis::Label).text(inter)
+      panel.add(Rubyvis::Line).data(data).
+      line_width(2).
+      left(lambda {|d| x.scale(d.x)}).
+      bottom(lambda {|d| y.scale(d.y)}).
+      interpolate(inter)
+  
+    end
+    vis.render()
+    pv_out=fixture_svg_read("line_interpolation.svg")
+    vis.to_svg.should have_same_svg_elements(pv_out)
+  end
+  it "should render correctly 'line_interpolation_segmented.html' example" do
+    data = pv.range(0, 10, 0.2).map {|x|
+    OpenStruct.new({:x=>x, :y=>Math.sin(x) + 2})}
+      
+      p_w=200
+      p_h=150
+      w = 20+p_w*2
+      h = 20+p_h*4
+      
+      p_w=200
+      p_h=150
+      #p data
+      w = 20+p_w*2
+      h = 20+p_h*4
+      
+      x = pv.Scale.linear(data, lambda {|d| d.x}).range(0, p_w-30)
+      
+      
+      y = pv.Scale.linear(data, lambda {|d| d.y}).range(0, p_h-20);
+      
+      interpolations=["linear","step-before","step-after","polar","polar-reverse", "basis", "cardinal","monotone"]
+      #/* The root panel. */
+      vis = pv.Panel.new()
+      .width(w)
+      .height(h)
+      .bottom(20)
+      .left(20)
+      .right(10)
+      .top(5)
+      
+      interpolations.each_with_index do |inter,i|
+      n=i%2
+      m=(i/2).floor
+      panel=vis.add(Rubyvis::Panel).
+      left(n*(p_w+10)).
+      top(m*(p_h+10)).
+      width(p_w).
+      height(p_h)
+    
+      panel.anchor('top').add(Rubyvis::Label).text(inter)
+      
+      panel.add(Rubyvis::Line).data(data).
+      segmented(true).
+      line_width(lambda {|d|d.y*2.0+self.index*0.5}).
+      left(lambda {|d| x.scale(d.x)}).
+      bottom(lambda {|d| y.scale(d.y)}).
+      interpolate(inter)
+    end
+    vis.render()
+    pv_out=fixture_svg_read("line_interpolation_segmented.svg")
+    vis.to_svg.should have_same_svg_elements(pv_out)
+  end
+  it "SvgScene.path_join should return correct value" do
+    s0=OpenStruct.new({:left=>1,:top=>2,:visible=>true, :line_width=>2.5})
+    s1=OpenStruct.new({:left=>3,:top=>4,:visible=>true, :line_width=>2.5})
+    s2=OpenStruct.new({:left=>5,:top=>6,:visible=>true, :line_width=>2.5})
+    s3=OpenStruct.new({:left=>7,:top=>8,:visible=>true, :line_width=>2.5})
+    Rubyvis::SvgScene.path_join(s0,s1,s2,s3).should=="M2.1161165235168156,4.883883476483184L4.116116523516816,6.883883476483184 5.883883476483184,5.116116523516816 3.8838834764831844,3.1161165235168156"
+    s0=OpenStruct.new({:left=>1.5,:top=>2,:visible=>true, :line_width=>3})
+    s1=OpenStruct.new({:left=>3.5,:top=>4,:visible=>true, :line_width=>3.5})
+    s2=OpenStruct.new({:left=>5.5,:top=>6,:visible=>true, :line_width=>4.0})
+    s3=OpenStruct.new({:left=>7.5,:top=>8,:visible=>true, :line_width=>4.5})
+    
+  Rubyvis::SvgScene.path_join(s0,s1,s2,s3).should=="M2.2625631329235425,5.2374368670764575L4.2625631329235425,7.2374368670764575 6.7374368670764575,4.7625631329235425 4.7374368670764575,2.7625631329235425"
+  
   end
   context "rendered" do
     before do
       @h=200
       @w=200
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