Add spec over style class

Author: darthjee

spec/lib/ruby_gnuplot/style_spec.rb

@@ -1,5 +1,66 @@
-describe Gnuplot::Plot do
+describe Gnuplot::Plot::Style do
   subject(:style) { described_class.new }
 
-  xit "Adds tests here"
+  let(:index) { style.index }
+
+  describe '#to_s' do
+    context "when nothing has been set" do
+      it 'creates an empty style' do
+        expect(style.to_s).to eq("set style line #{index}")
+      end
+    end
+
+    context 'when setting the stype' do
+      before do
+        style.ls = 1
+        style.lw = 2
+        style.lc = 3
+        style.pt = 4
+        style.ps = 5
+        style.fs = 6
+      end
+
+      it 'creates and indexes the style' do
+        expect(style.to_s).to eq(
+          "set style line #{index} ls 1 lw 2 lc 3 pt 4 ps 5 fs 6"
+        )
+      end
+    end
+
+    context 'when setting the stype on initialize' do
+      subject(:style) do
+        described_class.new do |style|
+          style.ls = 1
+          style.lw = 2
+          style.lc = 3
+          style.pt = 4
+          style.ps = 5
+          style.fs = 6
+        end
+      end
+
+      it 'creates and indexes the style' do
+        expect(style.to_s).to eq(
+          "set style line #{index} ls 1 lw 2 lc 3 pt 4 ps 5 fs 6"
+        )
+      end
+    end
+
+    context 'when setting using the full method name' do
+      before do
+        style.linestyle = 1
+        style.linewidth = 2
+        style.linecolor = 3
+        style.pointtype = 4
+        style.pointsize = 5
+        style.fill      = 6
+      end
+
+      it 'creates and indexes the style' do
+        expect(style.to_s).to eq(
+          "set style line #{index} ls 1 lw 2 lc 3 pt 4 ps 5 fs 6"
+        )
+      end
+    end
+  end
 end