Initial commit

spec/models/duration_timecode_spec.rb

@@ -0,0 +1,60 @@
+require "spec_helper"
+require_relative "../../app/models/duration_timecode"
+
+describe DurationTimecode do
+  describe ".parse" do
+    it "returns a new instance from a HH:MM:SS formatted string" do
+      duration = described_class.parse("00:30:20")
+
+      expect(duration).to be_a(described_class)
+      expect(duration.hours).to be_zero
+      expect(duration.minutes).to eq(30)
+      expect(duration.seconds).to eq(20)
+    end
+
+    context "with an invalid format" do
+      it "raises an error" do
+        expect {
+          described_class.parse("bad format")
+        }.to raise_error(ArgumentError)
+      end
+    end
+  end
+
+  describe ".from_seconds" do
+    it "returns a new instance from total seconds" do
+      duration = described_class.from_seconds(3662)
+
+      expect(duration.hours).to eq(1)
+      expect(duration.minutes).to eq(1)
+      expect(duration.seconds).to eq(2)
+    end
+  end
+
+  describe "#to_i" do
+    it "returns the total number of seconds" do
+      duration = described_class.parse("01:01:02")
+
+      expect(duration.to_i).to eq(3662)
+    end
+  end
+
+  describe "#to_s" do
+    it "returns a string in HH:MM:SS format" do
+      duration = described_class.new(0, 15, 30)
+
+      expect(duration.to_s).to eq("00:15:30")
+    end
+  end
+
+  describe "#+" do
+    it "returns an instance representing the sum" do
+      duration1 = described_class.new(0, 15, 40)
+      duration2 = described_class.new(0, 3, 25)
+
+      sum = duration1 + duration2
+
+      expect(sum.to_s).to eq("00:19:05")
+    end
+  end
+end