1 files changed, 61 insertions, 0 deletions
diff --git a/spec/gpio_spec.rb b/spec/gpio_spec.rb
new file mode 100644
index 0000000..48dd8ec
--- /dev/null
+++ b/spec/gpio_spec.rb
@@ -0,0 +1,61 @@
+require 'fileutils'
+require './spec/spec_helper'
+require './gpio'
+
+RSpec.describe Gpio do
+  let(:gpio) { described_class.new(1, prefix: "./spec/fixtures") }
+
+  before do
+    gpio.value = false
+  end
+
+  describe "#export" do
+    subject { gpio.export }
+
+    before do
+      FileUtils.touch("./spec/fixtures/export")
+    end
+
+    after do
+      FileUtils.remove("./spec/fixtures/export")
+    end
+
+    it "writes the pin to the export file" do
+      subject
+      export_file = File.read("./spec/fixtures/export")
+      expect(export_file).to eq("1")
+    end
+
+    it "sets the pin as an output" do
+      subject
+      direction_file = File.read("./spec/fixtures/gpio1/direction")
+      expect(direction_file).to eq("out")
+    end
+  end
+
+  describe "#toggle" do
+    subject { gpio.toggle }
+
+    it "toggles the value to true" do
+      expect { subject }.to change { gpio.value }.from(false).to(true)
+    end
+  end
+
+  describe "#value" do
+    subject { gpio.value }
+
+    it "returns false" do
+      expect(subject).to be_falsey
+    end
+
+    context "value is set to true" do
+      before do
+        gpio.value = true
+      end
+
+      it "returns true" do
+        expect(subject).to be_truthy
+      end
+    end
+  end
+end