Add denormalized list of artist_ids to album, to speed-up artist's albums queries

This will be removed once we have a proper many-to-many relationship between album and artist

utils/sanitize_strings_test.go

@@ -0,0 +1,32 @@
+package utils
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("SanitizeStrings", func() {
+	It("returns all lowercase chars", func() {
+		Expect(SanitizeStrings("Some Text")).To(Equal("some text"))
+	})
+
+	It("removes accents", func() {
+		Expect(SanitizeStrings("Quintão")).To(Equal("quintao"))
+	})
+
+	It("remove extra spaces", func() {
+		Expect(SanitizeStrings(" some  text  ")).To(Equal("some text"))
+	})
+
+	It("remove duplicated words", func() {
+		Expect(SanitizeStrings("legião urbana urbana legiÃo")).To(Equal("legiao urbana"))
+	})
+
+	It("remove symbols", func() {
+		Expect(SanitizeStrings("Tom’s Diner ' “40” ‘A’")).To(Equal("40 a diner toms"))
+	})
+
+	It("remove opening brackets", func() {
+		Expect(SanitizeStrings("[Five Years]")).To(Equal("five years"))
+	})
+})