Start adding template function tests

pkg/gcsql/initsql/init.go

@@ -12,12 +12,9 @@ import (
 )
 
 func banMaskTmplFunc(ban gcsql.IPBan) string {
-	if ban.ID < 1 {
 	if ban.RangeStart == ban.RangeEnd {
 		return ban.RangeStart
 	}
-		return ""
-	}
 	ipn, err := gcutil.GetIPRangeSubnet(ban.RangeStart, ban.RangeEnd)
 	if err != nil {
 		return "?"
@@ -69,7 +66,7 @@ func getTopPostIDTmplFunc(post *gcsql.Post) int {
 	return id
 }
 
-func numRepliesTmplFunc(boardid, opID int) int {
+func numRepliesTmplFunc(_, opID int) int {
 	num, err := gcsql.GetThreadReplyCountFromOP(opID)
 	if err != nil {
 		return 0

pkg/gcsql/initsql/init_test.go

@@ -0,0 +1,68 @@
+package initsql
+
+import (
+	"testing"
+
+	"github.com/gochan-org/gochan/pkg/gcsql"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBanMaskTmplFunc(t *testing.T) {
+	testCases := []struct {
+		desc       string
+		rangeStart string
+		rangeEnd   string
+		expects    string
+		banID      int
+	}{
+		{
+			desc: "expect empty string if either value is enpty",
+		},
+		{
+			desc:       "expect rangeStart if banID is 0 and rangeStart == rangEnd",
+			rangeStart: "192.168.56.1",
+			rangeEnd:   "192.168.56.1",
+			expects:    "192.168.56.1",
+		},
+		{
+			desc:       `expect "?" if an error is received and banID > 0`,
+			banID:      1,
+			rangeStart: "lol",
+			rangeEnd:   "lmao",
+			expects:    "?",
+		},
+		{
+			desc:       "expect CIDR if ban exists, comparison is valid, and IPs differ (IPv4)",
+			banID:      1,
+			rangeStart: "192.168.56.0",
+			rangeEnd:   "192.168.56.255",
+			expects:    "192.168.56.0/24",
+		},
+		{
+			desc:       "expect CIDR if ban exists, comparison is valid, and IPs differ (IPv6)",
+			banID:      1,
+			rangeStart: "2801::",
+			rangeEnd:   "2801::ffff",
+			expects:    "2801::/112",
+		},
+		{
+			desc:       "expect IP if ban exists, comparison is valid, and IPs are the same (IPv4)",
+			banID:      1,
+			rangeStart: "192.168.56.1",
+			rangeEnd:   "192.168.56.1",
+			expects:    "192.168.56.1",
+		},
+	}
+	var ban gcsql.IPBan
+	for _, tC := range testCases {
+		t.Run(tC.desc, func(tr *testing.T) {
+			ban = gcsql.IPBan{
+				ID:         tC.banID,
+				RangeStart: tC.rangeStart,
+				RangeEnd:   tC.rangeEnd,
+			}
+			result := banMaskTmplFunc(ban)
+			assert.Equal(tr, tC.expects, result)
+		})
+	}
+}