More robust testing

server/services/poll.go

@@ -8,6 +8,8 @@ import (
 	"go-sjles-pta-vote/server/models"
 )
 
+var ErrQuestionAlreadyExists = errors.New("Question already exists")
+
 func CreatePoll(poll *models.Poll) (*models.Poll, error) {
 	new_poll := models.Poll{}
 
@@ -33,7 +35,7 @@ func CreatePoll(poll *models.Poll) (*models.Poll, error) {
 		if err != nil {
 			return nil, err
 		}
-		return nil, errors.New("Already exists")
+		return nil, ErrQuestionAlreadyExists
 	}
 	
 	stmt, err := db_conn.Prepare(`

server/services/services_test.go

@@ -1,6 +1,7 @@
 package services
 
 import (
+	"math/rand"
 	"os"
 	"testing"
 	"time"
@@ -10,7 +11,71 @@ import (
 	"go-sjles-pta-vote/server/models"
 )
 
+const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-=`~!@#$%^&*()_+[]\\;',./{}|:\"<>?"
+
+func RandString(length int) string {
+	rand_bytes := make([]byte, length)
+	for rand_index := range length {
+		rand_bytes[rand_index] = charset[rand.Intn(len(charset))]
+	}
+	return string(rand_bytes)
+}
+
 func TestCreatePoll(t *testing.T) {
+	parameters := []struct{
+		question string
+		table_index int64
+	}{
+		{RandString(10) + "1", 1},
+		{RandString(10) + "2", 2},
+		{RandString(10) + "3", 3},
+		{"\"" + RandString(10) + "4", 4},
+		{"'" + RandString(10) + "5", 5},
+		{";" + RandString(10) + "6", 6},
+	}
+
+	tmp_db, err := os.CreateTemp("", "vote_test.*.db")
+	if err != nil {
+		t.Errorf(`Failed to create temporary db file: %v`, err)
+	}
+
+	init_conf := &config.Config{
+		DBPath: string(tmp_db.Name()),
+	}
+	config.SetConfig(init_conf)
+
+	defer os.Remove(tmp_db.Name())
+	tmp_db.Close()
+	
+	if _, err := db.Connect(); err != nil {
+		t.Errorf(`Failed to create the database: %v`, err)
+	}
+
+	for i := range parameters {
+		create_poll := &models.Poll{
+			Question: parameters[i].question,
+			ExpiresAt: time.Now().Add(time.Hour * 10).Format("2006-01-02 15:04:05"),
+		}
+
+		new_poll, err := CreatePoll(create_poll)
+
+		if err != nil {
+			t.Fatalf(`Failed to create new poll %s: %v`, parameters[i].question, err)
+		}
+
+		if new_poll == nil {
+			t.Fatalf(`Failed to insert %s into table`, parameters[i].question)
+		}
+
+		if new_poll.ID != parameters[i].table_index {
+			t.Fatalf(`Incorrect increment in index for %s: expected %d != %d`, parameters[i].question, parameters[i].table_index, new_poll.ID)
+		}
+	}
+}
+
+func TestAlreadyExists(t *testing.T) {
+	question := "TestQuestion"
+
 	tmp_db, err := os.CreateTemp("", "vote_test.*.db")
 	if err != nil {
 		t.Errorf(`Failed to create temporary db file: %v`, err)
@@ -29,17 +94,23 @@ func TestCreatePoll(t *testing.T) {
 	}
 
 	create_poll := &models.Poll{
-		Question: "TestQuestion",
+		Question: question,
 		ExpiresAt: time.Now().Add(time.Hour * 10).Format("2006-01-02 15:04:05"),
 	}
 
 	new_poll, err := CreatePoll(create_poll)
-	
+
 	if err != nil {
-		t.Errorf(`Failed to insert into table: %v`, err)
+		t.Fatalf(`Failed to create new poll %s: %v`, question, err)
 	}
 
 	if new_poll == nil {
-		t.Errorf(`Failed to insert into table`)
+		t.Fatalf(`Failed to insert %s into table`, question)
+	}
+
+	new_poll, err = CreatePoll(create_poll)
+
+	if err != ErrQuestionAlreadyExists {
+		t.Fatalf(`Should have failed adding %s as it already exists`, question)
 	}
 }