implement Color#opacity=

3 files changed, 182 insertions, 0 deletions

diff --git a/test/quad_spec.rb b/test/quad_spec.rb
new file mode 100644
index 0000000..58f2dfd
--- /dev/null
+++ b/test/quad_spec.rb
@@ -0,0 +1,92 @@
+require 'ruby2d'
+
+RSpec.describe Ruby2D::Quad do
+  describe '#new' do
+    it "creates a quad with white color by default" do
+      quad = Quad.new(
+        300, 200,
+        350, 200,
+        300, 250,
+        250, 250
+      )
+
+      expect(quad.color).to   be_a(Ruby2D::Color)
+      expect(quad.color.r).to eq(1)
+      expect(quad.color.g).to eq(1)
+      expect(quad.color.b).to eq(1)
+      expect(quad.color.a).to eq(1)
+    end
+
+    it 'creates a new quad with one color via string' do
+      quad = Quad.new(
+        300, 200,
+        350, 200,
+        300, 250,
+        250, 250,
+        "red"
+      )
+
+      expect(quad.color).to be_a(Ruby2D::Color)
+    end
+
+    it "creates a new triangle with one color via array of numbers" do
+      quad = Quad.new(
+        300, 200,
+        350, 200,
+        300, 250,
+        250, 250,
+        [0.1, 0.3, 0.5, 0.7]
+      )
+
+      expect(quad.color).to be_a(Ruby2D::Color)
+    end
+
+    it "creates a new quad with 4 colors via array of 4 strings" do
+      quad = Quad.new(
+        300, 200,
+        350, 200,
+        300, 250,
+        250, 250,
+        ["red", "green", "blue", "black"]
+      )
+
+      expect(quad.color).to be_a(Ruby2D::Color::Set)
+    end
+
+    it "creates a new quad with 4 colors via array of 4 arrays of arrays of numbers" do
+      quad = Quad.new(
+        300, 200,
+        350, 200,
+        300, 250,
+        250, 250,
+        [[0.1, 0.3, 0.5, 0.7], [0.2, 0.4, 0.6, 0.8], [0.3, 0.5, 0.7, 0.9], [0.4, 0.6, 0.8, 1.0]]
+      )
+
+      expect(quad.color).to be_a(Ruby2D::Color::Set)
+    end
+
+    it "throws an error when array of 3 strings is passed" do
+      expect do
+        Quad.new(
+          300, 200,
+          350, 200,
+          300, 250,
+          250, 250,
+          ["red", "green", "blue"]
+        )
+      end.to raise_error("Quads require 4 colors, one for each vertex. 3 were given.")
+    end
+
+    it "throws an error when array of 5 strings is passed" do
+      expect do
+        Quad.new(
+          300, 200,
+          350, 200,
+          300, 250,
+          250, 250,
+          ["red", "green", "blue", "black", "fuchsia"]
+        )
+      end.to raise_error("Quads require 4 colors, one for each vertex. 5 were given.")
+    end
+  end
+end
diff --git a/test/testcard.rb b/test/testcard.rb
index 44cc817..b25813b 100644
--- a/test/testcard.rb
+++ b/test/testcard.rb
@@ -175,6 +175,10 @@ pointer = Square.new(0, 0, 10, [1, 1, 1, 1])
 pointer_outline = Square.new(0, 0, 18, [0, 1, 0, 0])
 flash = 0
 
+# Updating opacity
+opacity_square = Square.new(500, 255, 50, ["red", "green", "blue", "yellow"])
+time_start     = Time.now
+
 on key: 'escape' do
   close
 end
@@ -202,6 +206,10 @@ update do
   if (get :frames) % 20 == 0
     fps.text = "FPS: #{(get :fps).round(3)}"
   end
+
+  elapsed_time = Time.now - time_start
+  opacity = Math.sin(3 * elapsed_time.to_f).abs
+  opacity_square.color.opacity = opacity
 end
 
 show
diff --git a/test/triangle_spec.rb b/test/triangle_spec.rb
new file mode 100644
index 0000000..f71b097
--- /dev/null
+++ b/test/triangle_spec.rb
@@ -0,0 +1,82 @@
+require 'ruby2d'
+
+RSpec.describe Ruby2D::Triangle do
+  describe '#new' do
+    it "creates a triangle with white color by default" do
+      triangle = Triangle.new(
+        320,  50,
+        540, 430,
+        100, 430
+      )
+      expect(triangle.color).to   be_a(Ruby2D::Color)
+      expect(triangle.color.r).to eq(1)
+      expect(triangle.color.g).to eq(1)
+      expect(triangle.color.b).to eq(1)
+      expect(triangle.color.a).to eq(1)
+    end
+
+    it 'creates a new triangle with one color via string' do
+      triangle = Triangle.new(
+        320,  50,
+        540, 430,
+        100, 430,
+        "black"
+      )
+
+      expect(triangle.color).to be_a(Ruby2D::Color)
+    end
+
+    it "creates a new triangle with one color via array of numbers" do
+      triangle = Triangle.new(
+        320,  50,
+        540, 430,
+        100, 430,
+        [0.1, 0.3, 0.5, 0.7]
+      )
+
+      expect(triangle.color).to be_a(Ruby2D::Color)
+    end
+
+    it "creates a new triangle with 3 colors via array of 3 strings" do
+      triangle = Triangle.new(
+        320,  50,
+        540, 430,
+        100, 430,
+        ["red", "green", "blue"]
+      )
+      expect(triangle.color).to be_a(Ruby2D::Color::Set)
+    end
+
+    it "creates a new triangle with 3 colors via array of 3 arrays of arrays of numbers" do
+      triangle = Triangle.new(
+        320,  50,
+        540, 430,
+        100, 430,
+        [[0.1, 0.3, 0.5, 0.7], [0.2, 0.4, 0.6, 0.8], [0.3, 0.5, 0.7, 0.9]]
+      )
+      expect(triangle.color).to be_a(Ruby2D::Color::Set)
+    end
+
+    it "throws an error when array of 2 strings is passed" do
+      expect do
+        Triangle.new(
+          320,  50,
+          540, 430,
+          100, 430,
+          ["red", "green"]
+        )
+      end.to raise_error("Triangles require 3 colors, one for each vertex. 2 were given.")
+    end
+
+    it "throws an error when array of 4 strings is passed" do
+      expect do
+        Triangle.new(
+          320,  50,
+          540, 430,
+          100, 430,
+          ["red", "green", "blue", "fuchsia"]
+        )
+      end.to raise_error("Triangles require 3 colors, one for each vertex. 4 were given.")
+    end
+  end
+end