Add more unit tests

backend/internal/dnsproviders/common_test.go

@@ -0,0 +1,33 @@
+package dnsproviders
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetAll(t *testing.T) {
+	providers := GetAll()
+	// This number will have to (annoyingly) be updated
+	// when adding new dns providers to the list
+	assert.Equal(t, 45, len(providers))
+
+	_, dynuExists := providers["dns_dynu"]
+	assert.Equal(t, true, dynuExists)
+	_, duckDNSExists := providers["dns_duckdns"]
+	assert.Equal(t, true, duckDNSExists)
+	_, cfExists := providers["dns_cf"]
+	assert.Equal(t, true, cfExists)
+	_, randomExists := providers["dns_shouldnotexist"]
+	assert.Equal(t, false, randomExists)
+}
+
+func TestGet(t *testing.T) {
+	provider, err := Get("dns_duckdns")
+	assert.Nil(t, err)
+	assert.Equal(t, "dns_duckdns", provider.Title)
+
+	provider, err = Get("dns_shouldnotexist")
+	assert.NotNil(t, err)
+	assert.Equal(t, "provider_not_found", err.Error())
+}