add unit tests for various utility functions,

add integration test for LDAPClient,
add aiutomatic openldap configuration for testing through make,
add make targets for tests
improve make targets for build/clean,
update README with build and test instructions

Makefile

@@ -1,9 +1,23 @@
-build: clean
+.PHONY: build test clean dev-init
-	CGO_ENABLED=0 go build -ldflags="-s -w" -o dist/ .
 
-test: clean
+build: clean
-	go run .
+	@echo "======================== Building Binary ======================="
+	CGO_ENABLED=0 go build -ldflags="-s -w" -v -o dist/ .
+
+tests: dev-reinit
+	@echo "======================== Running Tests ========================="
+	go test -v -cover -coverpkg=./app/ -coverprofile coverage ./test/
+	@echo "======================= Coverage Report ========================"
+	go tool cover -func=coverage
+	@rm -f coverage
 
 clean:
+	@echo "======================== Cleaning Project ======================"
 	go clean
 	rm -f dist/*
+
+dev-init:
+	@cd scripts; make dev-init
+
+dev-reinit:
+	@cd scripts; make dev-reinit

README.md

@@ -34,3 +34,20 @@ ProxmoxAAS LDAP provides a simple API for managing users and groups in a simplif
     - baseDN: base DN ie. `dc=domain,dc=net`
     - sessionSecretKey: random value used to randomize cookie values, replace with any sufficiently large random string
 3. Run the binary
+
+## Building and Testing from Source
+
+Building requires the go toolchain. Testing requires the go toolchain, make, and apt. Currently only supports Debian.
+
+### Building from Source
+
+1. Clone the repository
+2. Run `go get` to get requirements
+3. Run `make` to build the binary
+
+### Testing Source
+
+1. Clone the repository
+2. Run `go get` to get requirements
+3. Run `make dev-init` to install test requirements including openldap (slapd), ldap-utils, debconf-utils
+4. Run `make tests` to run all tests

scripts/Makefile

@@ -0,0 +1,18 @@
+.PHONY: dev-init
+
+prerequisites:
+	@echo "=================== Installing Prerequisites ==================="
+	apt install debconf-utils slapd ldap-utils sudo gettext
+	git clone https://git.tronnet.net/tronnet/open-ldap-setup
+	cd open-ldap-setup/; bash gencert.sh < ../gencert.conf;
+	rm -rf open-ldap-setup/
+
+dev-init: prerequisites dev-reinit
+
+dev-reinit:
+	@echo "====================== Initializing Slapd ======================"
+	cat debconf-slapd.conf | debconf-set-selections
+	DEBIAN_FRONTEND=noninteractive dpkg-reconfigure slapd
+	git clone https://git.tronnet.net/tronnet/open-ldap-setup
+	cd open-ldap-setup/; bash setup.sh < ../setup.conf;
+	rm -rf open-ldap-setup/

scripts/debconf-slapd.conf

@@ -0,0 +1,16 @@
+slapd slapd/password1 password admin
+slapd slapd/internal/adminpw password admin
+slapd slapd/internal/generated_adminpw password admin
+slapd slapd/password2 password admin
+slapd slapd/unsafe_selfwrite_acl note
+slapd slapd/purge_database boolean true
+slapd slapd/domain string test.paasldap
+slapd slapd/ppolicy_schema_needs_update select abort installation
+slapd slapd/invalid_config boolean true
+slapd slapd/move_old_database boolean true
+slapd slapd/backend select MDB
+slapd shared/organization string paasldap
+slapd slapd/dump_database_destdir string /var/backups/slapd-VERSION
+slapd slapd/no_configuration boolean false
+slapd slapd/dump_database select when needed
+slapd slapd/password_mismatch note

scripts/gencert.conf

@@ -0,0 +1,2 @@
+paasldap
+localhost

scripts/setup.conf

@@ -0,0 +1,10 @@
+dc=test,dc=paasldap
+adminuser
+adminuser@test.paasldap
+admin
+user
+admin123
+admin123
+/etc/ssl/certs/ldap-ca-cert.pem
+/etc/ldap/ldap-server-cert.pem
+/etc/ldap/ldap-server-key.pem

test/bad_config.json

@@ -0,0 +1 @@
+{,,}

test/test_config.json

@@ -0,0 +1,14 @@
+{
+    "listenPort": 80,
+    "ldapURL": "ldap://localhost",
+    "startTLS": true,
+    "basedn": "dc=test,dc=paasldap",
+    "sessionSecretKey": "test",
+    "sessionCookieName": "PAASLDAPAuthTicket",
+    "sessionCookie": {
+        "path": "/",
+        "httpOnly": true,
+        "secure": false,
+        "maxAge": 7200
+    }
+}

test/test_utils.go

@@ -0,0 +1,156 @@
+package tests
+
+import (
+	"fmt"
+	"math/rand"
+	"net/http"
+	"proxmoxaas-ldap/app"
+	"reflect"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-ldap/ldap/v3"
+)
+
+func RandInt(min int, max int) int {
+	return rand.Intn(max+1-min) + min
+}
+
+func RandString(n int) string {
+	var letters = []rune("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	b := make([]rune, n)
+	for i := range b {
+		b[i] = letters[rand.Intn(len(letters))]
+	}
+	return string(b)
+}
+
+// random ldap style DN
+func RandDN(n int) string {
+	return fmt.Sprintf("cn=%s,ou=%s,dc=%s,dc=%s", RandString(n), RandString(n), RandString(n), RandString(n))
+}
+
+// typically for testing values of a variable
+func AssertEquals[T comparable](t *testing.T, label string, a T, b T) {
+	t.Helper()
+	if a != b {
+		t.Errorf(`%s = %#v; expected %#v.`, label, a, b)
+	}
+}
+
+// asserting the success or failure of a generic error
+func AssertError(t *testing.T, label string, gotErr error, expectErr error) {
+	t.Helper()
+	if gotErr != nil && expectErr != nil {
+		if gotErr.Error() != expectErr.Error() {
+			t.Errorf(`%s returned %s; expected %s`, label, gotErr.Error(), expectErr.Error())
+		}
+	} else {
+		if gotErr != expectErr {
+			t.Errorf(`%s returned %s; expected %s`, label, gotErr.Error(), expectErr.Error())
+		}
+	}
+}
+
+// typically for asserting the success or failure of an ldap result
+func AssertLDAPError(t *testing.T, label string, gotErr any, expectErrCode uint16) {
+	t.Helper()
+	expectError := ldap.LDAPResultCodeMap[expectErrCode]
+	if expectErrCode == ldap.LDAPResultSuccess { // expect success
+		if gotErr != nil { // got an error
+			gotErr := gotErr.(error)
+			t.Errorf(`%s returned %s; expected %s.`, label, gotErr.Error(), "success")
+		} // did not get an error
+	} else { // expect error
+		if gotErr == nil { // did not get an error
+			t.Errorf(`%s returned %s; expected %s.`, label, "success", expectError)
+			return
+		}
+		gotErr := gotErr.(error)
+		if !ldap.IsErrorWithCode(gotErr, expectErrCode) { // got an error that does not match the expected error
+			t.Errorf(`%s returned %s; expected %s.`, label, gotErr.Error(), expectError)
+		} // got the expected error
+	}
+}
+
+// typically for asserting the success or failure of an http result
+func AssertStatus(t *testing.T, label string, gotCode int, expectCode int) {
+	t.Helper()
+	if expectCode == http.StatusOK {
+		if gotCode != http.StatusOK { // got an error
+			t.Errorf(`%s returned %d; expected %d.`, label, gotCode, expectCode)
+		}
+	} else { // expect error
+		if gotCode == http.StatusOK { // did not get an error
+			t.Errorf(`%s returned %d; expected %d.`, label, gotCode, expectCode)
+		} else if gotCode != expectCode { // got an error that does not match the expected error
+			t.Errorf(`%s returned %d; expected %d.`, label, gotCode, expectCode)
+		}
+	}
+}
+
+// compare if two users are equal, accepts LDAPUser or gin.H
+func AssertLDAPUserEquals(t *testing.T, label string, a any, b app.LDAPUser) {
+	t.Helper()
+
+	aObj, ok := a.(app.LDAPUser)
+	if ok {
+		if !reflect.DeepEqual(aObj, b) {
+			t.Errorf(`%s = %#v; expected %#v.`, label, aObj, b)
+		}
+		return
+	}
+
+	aGin, ok := a.(gin.H)
+	if ok {
+		bGin := app.LDAPUserToGin(b)
+		if !reflect.DeepEqual(aGin, bGin) {
+			t.Errorf(`%s = %#v; expected %#v.`, label, aGin, bGin)
+		}
+		return
+	}
+
+	// not a supported type
+	t.Errorf(`%s = %#v; expected %#v.`, label, a, b)
+}
+
+// compare if two users are equal, accepts LDAPUser or gin.H
+func AssertLDAPGroupEquals(t *testing.T, label string, a any, b app.LDAPGroup) {
+	t.Helper()
+
+	aObj, ok := a.(app.LDAPGroup)
+	if ok {
+		if !reflect.DeepEqual(aObj, b) {
+			t.Errorf(`%s = %#v; expected %#v.`, label, aObj, b)
+		}
+		return
+	}
+
+	aGin, ok := a.(gin.H)
+	if ok {
+		bGin := app.LDAPGroupToGin(b)
+		if !reflect.DeepEqual(aGin, bGin) {
+			t.Errorf(`%s = %#v; expected %#v.`, label, aGin, bGin)
+		}
+		return
+	}
+
+	// not a supported type
+	t.Errorf(`%s = %#v; expected %#v.`, label, a, b)
+}
+
+var _config, _ = app.GetConfig("test_config.json")
+var BaseDN = _config.BaseDN
+var PeopleDN = fmt.Sprintf("ou=people,%s", BaseDN)
+var GroupDN = fmt.Sprintf("ou=groups,%s", BaseDN)
+
+type User struct {
+	username string
+	password string
+	userObj  app.LDAPUser
+}
+
+type Group struct {
+	groupname string
+	groupObj  app.LDAPGroup
+}

test/unit_test.go

@@ -0,0 +1,126 @@
+package tests
+
+import (
+	"errors"
+	"fmt"
+	app "proxmoxaas-ldap/app"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-ldap/ldap/v3"
+)
+
+// test the GetConfig utility function because it used in other tests
+func TestConfig_ValidPath(t *testing.T) {
+	config, err := app.GetConfig("test_config.json")
+
+	AssertError(t, "GetConfig()", err, nil)
+	AssertEquals(t, "config.ListenPort", config.ListenPort, 80)
+	AssertEquals(t, "config.LdapURL", config.LdapURL, "ldap://localhost")
+	AssertEquals(t, "config.BaseDN", config.BaseDN, "dc=test,dc=paasldap")
+	AssertEquals(t, "config.SessionSecretKey", config.SessionSecretKey, "test")
+	AssertEquals(t, "config.SessionCookieName", config.SessionCookieName, "PAASLDAPAuthTicket")
+	AssertEquals(t, "config.SessionCookie.Path", config.SessionCookie.Path, "/")
+	AssertEquals(t, "config.SessionCookie.HttpOnly", config.SessionCookie.HttpOnly, true)
+	AssertEquals(t, "config.SessionCookie.Secure", config.SessionCookie.Secure, false)
+	AssertEquals(t, "config.SessionCookie.MaxAge", config.SessionCookie.MaxAge, 7200)
+}
+
+func TestConfig_InvalidPath(t *testing.T) {
+	badFileName := RandString(16)
+	_, err := app.GetConfig(badFileName)
+	expectedErr := fmt.Errorf("open %s: no such file or directory", badFileName)
+	AssertError(t, "GetConfig()", err, expectedErr)
+
+	_, err = app.GetConfig("bad_config.json")
+	expectedErr = fmt.Errorf("invalid character ',' looking for beginning of object key string")
+	AssertError(t, "GetConfig()", err, expectedErr)
+}
+
+// test the LDAPEntryToUser and LDAPUserToGin utility functions
+func TestLDAPUserDataPipeline(t *testing.T) {
+	var memberOf []string
+	for i := 0; i < RandInt(5, 20); i++ {
+		memberOf = append(memberOf, RandDN(16))
+	}
+
+	expectedUser := app.LDAPUser{
+		DN: RandDN(16),
+		Attributes: app.LDAPUserAttributes{
+			CN:       RandString(16),
+			SN:       RandString(16),
+			Mail:     RandString(16),
+			UID:      RandString(16),
+			MemberOf: memberOf,
+		},
+	}
+
+	attributes := make(map[string][]string)
+	attributes["cn"] = []string{expectedUser.Attributes.CN}
+	attributes["sn"] = []string{expectedUser.Attributes.SN}
+	attributes["mail"] = []string{expectedUser.Attributes.Mail}
+	attributes["uid"] = []string{expectedUser.Attributes.UID}
+	attributes["memberOf"] = expectedUser.Attributes.MemberOf
+
+	entry := ldap.NewEntry(expectedUser.DN, attributes)
+
+	user := app.LDAPEntryToLDAPUser(entry)
+	AssertLDAPUserEquals(t, "LDAPEntryToLDAPUser(entry) -> user", user, expectedUser)
+
+	json := app.LDAPUserToGin(user)
+	AssertLDAPUserEquals(t, "LDAPUserToGin(user) -> json", json, expectedUser)
+}
+
+// test the LDAPEntryToGroup and LDAPGroupToGin utility functions
+func TestLDAPGroupDataPipeline(t *testing.T) {
+	var member []string
+	for i := 0; i < RandInt(5, 20); i++ {
+		member = append(member, RandDN(16))
+	}
+
+	expectedGroup := app.LDAPGroup{
+		DN: RandDN(16),
+		Attributes: app.LDAPGroupAttributes{
+			Member: member,
+		},
+	}
+
+	attributes := make(map[string][]string)
+	attributes["member"] = expectedGroup.Attributes.Member
+
+	entry := ldap.NewEntry(expectedGroup.DN, attributes)
+
+	group := app.LDAPEntryToLDAPGroup(entry)
+	AssertLDAPGroupEquals(t, "LDAPEntryToLDAPGroup(entry) -> group", group, expectedGroup)
+
+	json := app.LDAPGroupToGin(group)
+	AssertLDAPGroupEquals(t, "LDAPGroupToGin(group) -> json", json, expectedGroup)
+}
+
+func TestHandleResponse(t *testing.T) {
+	for errorCode := range ldap.LDAPResultCodeMap {
+		expectedMessage := RandString(16)
+		LDAPerr := ldap.NewError(errorCode, errors.New(expectedMessage))
+		res := gin.H{
+			"error": LDAPerr,
+		}
+		LDAPResult := ldap.LDAPResultCodeMap[errorCode]
+
+		handledResponseError := (app.HandleResponse(res))["error"].(gin.H)
+
+		AssertEquals(t, `HandleResponse(res)["error"]["code"]`, handledResponseError["code"].(uint16), errorCode)
+		AssertEquals(t, `HandleResponse(res)["error"]["result"]`, handledResponseError["result"].(string), LDAPResult)
+		AssertEquals(t, `HandleResponse(res)["error"]["message"]`, handledResponseError["message"].(string), expectedMessage)
+	}
+
+	res := gin.H{
+		"ok":     true,
+		"status": RandInt(0, 600),
+	}
+
+	handledResponse := app.HandleResponse(res)
+
+	AssertEquals(t, `HandleResponse(res)["ok"]`, handledResponse["ok"].(bool), res["ok"].(bool))
+	AssertEquals(t, `HandleResponse(res)["satus"]`, handledResponse["status"].(int), res["status"].(int))
+	AssertEquals(t, `HandleResponse(res)["error"]`, handledResponse["error"], nil)
+}