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// SPDX-License-Identifier: ISC
// Copyright © 2021 siddharth <s@ricketyspace.net>
package db
import (
"os"
"path"
"testing"
)
func stringsContain(haystack []string, needle string) bool {
for _, s := range haystack {
if s == needle {
return true
}
}
return false
}
func TestOpenPathNotSet(t *testing.T) {
// Set custom path for db.
dbPath = ""
defer os.Remove(dbPath)
_, err := Open()
if err == nil {
t.Errorf("Error: db.Open did not fail when dbPath is empty\n")
return
}
if err.Error() != "FernDB path not set" {
t.Errorf("Error: db.Open wrong error message when dbPath is empty\n")
return
}
}
func TestOpenNewDB(t *testing.T) {
// Set custom path for db.
dbPath = path.Join(os.TempDir(), "fern-db.json")
defer os.Remove(dbPath)
// Open empty db.
db, err := Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
// Verify that 'mutex' is initialized.
if db.mutex == nil {
t.Errorf("db.mutex is nil")
return
}
db.mutex.Lock()
db.mutex.Unlock()
// Verify that 'downloaded' is initialized
if db.downloaded == nil {
t.Errorf("db.downloaded is nil")
return
}
}
func TestOpenExistingDB(t *testing.T) {
// Set custom path for db.
dbPath = path.Join(os.TempDir(), "fern-db.json")
defer os.Remove(dbPath)
// Write a sample test db to fern-db.json
testDBJSON := []byte(`{"mkbhd":["rivian","v-raptor","m1-imac"],"npr":["william-prince","joy-oladokun","lucy-ducas"],"simone":["weightless","ugly-desks","safety-hat"]}`)
dbFile, err := os.Create(dbPath)
defer dbFile.Close()
if err != nil {
t.Errorf("Unable to create fern-db.json: %v", err.Error())
return
}
n, err := dbFile.Write(testDBJSON)
if len(testDBJSON) != n {
t.Errorf("Write to fern-db.json failed: %v", err.Error())
return
}
// Open the db.
db, err := Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
// Verify that 'mutex' is initialized.
if db.mutex == nil {
t.Errorf("db.mutex is nil")
return
}
db.mutex.Lock()
db.mutex.Unlock()
// Validate db.downloaded.
var entries, expectedEntries []string
var ok bool
if len(db.downloaded) != 3 {
t.Errorf("db.downloaded does not contain 3 feeds")
return
}
// mkbhd
if entries, ok = db.downloaded["mkbhd"]; !ok {
t.Errorf("db.downloaded does not contain mkbhd")
return
}
expectedEntries = []string{"rivian", "v-raptor", "m1-imac"}
for _, entry := range entries {
if !stringsContain(expectedEntries, entry) {
t.Errorf("%v does not exist in db.downloaded[mkbhd]", entry)
return
}
}
// simone
if entries, ok = db.downloaded["simone"]; !ok {
t.Errorf("db.downloaded does not contain simone")
return
}
expectedEntries = []string{"weightless", "ugly-desks", "safety-hat"}
for _, entry := range entries {
if !stringsContain(expectedEntries, entry) {
t.Errorf("%v does not exist in db.downloaded[simone]", entry)
return
}
}
// npr
if entries, ok = db.downloaded["npr"]; !ok {
t.Errorf("db.downloaded does not contain npr")
return
}
expectedEntries = []string{"william-prince", "lucy-ducas", "joy-oladokun"}
for _, entry := range entries {
if !stringsContain(expectedEntries, entry) {
t.Errorf("%v does not exist in db.downloaded[npr]", entry)
return
}
}
}
func TestExists(t *testing.T) {
// Set custom path for db.
dbPath = path.Join(os.TempDir(), "fern-db.json")
defer os.Remove(dbPath)
// Write a sample test db to fern-db.json
testDBJSON := []byte(`{"npr":["william-prince","joy-oladokun","lucy-ducas"]}`)
dbFile, err := os.Create(dbPath)
defer dbFile.Close()
if err != nil {
t.Errorf("Unable to create fern-db.json: %v", err.Error())
return
}
n, err := dbFile.Write(testDBJSON)
if len(testDBJSON) != n {
t.Errorf("Write to fern-db.json failed: %v", err.Error())
return
}
// Open the db.
db, err := Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
// Test Exists.
if db.Exists("mkbhd", "v-raptor") {
t.Errorf("db.Exists failed: mkbhd does not exist in db")
return
}
if db.Exists("npr", "julien-baker") {
t.Errorf("db.Exists failed: (%s, %s) does not exist in db",
"npr", "julien-baker")
return
}
if !db.Exists("npr", "joy-oladokun") {
t.Errorf("db.Exists failed: (%s, %s) exists in db",
"npr", "joy-oladokun")
return
}
}
func TestAdd(t *testing.T) {
// Set custom path for db.
dbPath = path.Join(os.TempDir(), "fern-db.json")
defer os.Remove(dbPath)
// Write a sample test db to fern-db.json
testDBJSON := []byte(`{"npr":["william-prince","joy-oladokun"]}`)
dbFile, err := os.Create(dbPath)
defer dbFile.Close()
if err != nil {
t.Errorf("Unable to create fern-db.json: %v", err.Error())
return
}
n, err := dbFile.Write(testDBJSON)
if len(testDBJSON) != n {
t.Errorf("Write to fern-db.json failed: %v", err.Error())
return
}
// Open the db.
db, err := Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
// Test `Add` for an existing feed.
db.Add("npr", "julian-baker")
if len(db.downloaded["npr"]) != 3 {
t.Errorf("db.Add failed: expected 3 entries for 'npr'")
return
}
if !db.Exists("npr", "julian-baker") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"julian-baker")
return
}
db.Add("npr", "julian-baker")
if len(db.downloaded["npr"]) != 3 {
t.Errorf("db.Add failed: expected 3 entries for 'npr'")
return
}
// Test `Add` for nonexistent feed.
db.Add("mark-rober", "glitter-bomb")
if len(db.downloaded["mark-rober"]) != 1 {
t.Errorf("db.Add failed: expected 1 entry for 'mark-rober'")
return
}
if !db.Exists("mark-rober", "glitter-bomb") {
t.Errorf("db.Add failed: expected %s in 'mark-rober' feed",
"glitter-bomb")
return
}
db.Add("mark-rober", "squirrel-maze")
if len(db.downloaded["mark-rober"]) != 2 {
t.Errorf("db.Add failed: expected 2 entries for 'mark-rober'")
return
}
if !db.Exists("mark-rober", "squirrel-maze") {
t.Errorf("db.Add failed: expected %s in 'mark-rober' feed",
"squirrel-maze")
return
}
}
func TestWriteNewDB(t *testing.T) {
// Set custom path for db.
dbPath = path.Join(os.TempDir(), "fern-db.json")
defer os.Remove(dbPath)
// Open the db.
db, err := Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
// Populate db with test data and write to db to disk.
db.Add("npr", "william-prince")
db.Add("npr", "julian-baker")
db.Add("mkbhd", "v-raptor")
db.Write()
// Read db refreshly from disk and verify the db contents.
db, err = Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
if len(db.downloaded["npr"]) != 2 {
t.Errorf("db.Add failed: expected 2 entries for 'npr'")
return
}
if !db.Exists("npr", "william-prince") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"william-prince")
return
}
if !db.Exists("npr", "julian-baker") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"julian-baker")
return
}
if len(db.downloaded["mkbhd"]) != 1 {
t.Errorf("db.Add failed: expected 1 entry for 'npr'")
return
}
if !db.Exists("mkbhd", "v-raptor") {
t.Errorf("db.Add failed: expected %s in 'mkbhd' feed",
"v-raptor")
return
}
}
func TestWriteExistingDB(t *testing.T) {
// Set custom path for db.
dbPath = path.Join(os.TempDir(), "fern-db.json")
defer os.Remove(dbPath)
// Write a sample test db to fern-db.json
testDBJSON := []byte(`{"npr":["kurt-vile","joy-oladokun"]}`)
dbFile, err := os.Create(dbPath)
defer dbFile.Close()
if err != nil {
t.Errorf("Unable to create fern-db.json: %v", err.Error())
return
}
n, err := dbFile.Write(testDBJSON)
if len(testDBJSON) != n {
t.Errorf("Write to fern-db.json failed: %v", err.Error())
return
}
// Open the db.
db, err := Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
// Populate db with test data and write to db to disk.
db.Add("npr", "william-prince")
db.Add("npr", "julian-baker")
db.Add("mkbhd", "v-raptor")
db.Write()
// Read db refreshly from disk and verify the db contents.
db, err = Open()
if err != nil {
t.Errorf("db.Open failed: %v", err.Error())
return
}
if len(db.downloaded["npr"]) != 4 {
t.Errorf("db.Add failed: expected 2 entries for 'npr'")
return
}
if !db.Exists("npr", "kurt-vile") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"kurt-vile")
return
}
if !db.Exists("npr", "joy-oladokun") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"joy-oladokun")
return
}
if !db.Exists("npr", "william-prince") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"william-prince")
return
}
if !db.Exists("npr", "julian-baker") {
t.Errorf("db.Add failed: expected %s in 'npr' feed",
"julian-baker")
return
}
if len(db.downloaded["mkbhd"]) != 1 {
t.Errorf("db.Add failed: expected 1 entry for 'npr'")
return
}
if !db.Exists("mkbhd", "v-raptor") {
t.Errorf("db.Add failed: expected %s in 'mkbhd' feed",
"v-raptor")
return
}
}
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