Remove duplicated helper functions, move them to utils package

utils/files_test.go

@@ -0,0 +1,38 @@
+package utils
+
+import (
+	"path/filepath"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Files", func() {
+	Describe("IsAudioFile", func() {
+		It("returns true for a MP3 file", func() {
+			Expect(IsAudioFile(filepath.Join("path", "to", "test.mp3"))).To(BeTrue())
+		})
+
+		It("returns true for a FLAC file", func() {
+			Expect(IsAudioFile("test.flac")).To(BeTrue())
+		})
+
+		It("returns false for a non-audio file", func() {
+			Expect(IsAudioFile("test.jpg")).To(BeFalse())
+		})
+	})
+
+	Describe("IsImageFile", func() {
+		It("returns true for a PNG file", func() {
+			Expect(IsImageFile(filepath.Join("path", "to", "test.png"))).To(BeTrue())
+		})
+
+		It("returns true for a JPEG file", func() {
+			Expect(IsImageFile("test.JPEG")).To(BeTrue())
+		})
+
+		It("returns false for a non-image file", func() {
+			Expect(IsImageFile("test.mp3")).To(BeFalse())
+		})
+	})
+})