adapter_test.go

// Copyright 2018 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package mongodbadapter

import (
	"context"
	"fmt"
	"github.com/casbin/casbin/v2/util"
	"github.com/stretchr/testify/assert"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
	"os"
	"testing"

	"github.com/casbin/casbin/v2"
)

var dbHost = os.Getenv("DB_HOST")
var testDbURI = ""

func getDbURI() string {
	if testDbURI == "" {
		if dbHost != "" {
			testDbURI = "mongodb://" + dbHost + "/casbin_test"
		} else {
			testDbURI = "mongodb://127.0.0.1:27017/casbin_test"
		}
	}

	return testDbURI
}

func getDbURL() string {
	if dbHost != "" {
		return "mongodb://" + dbHost
	} else {
		return "mongodb://127.0.0.1:27017"
	}
}

func testGetPolicy(t *testing.T, e *casbin.Enforcer, res [][]string) {
	t.Helper()
	myRes := e.GetPolicy()
	t.Log("Policy: ", myRes)

	if !util.Array2DEquals(res, myRes) {
		t.Error("Policy: ", myRes, ", supposed to be ", res)
	}
}

func testGetPolicyWithoutOrder(t *testing.T, e *casbin.Enforcer, res [][]string) {
	myRes := e.GetPolicy()

	if !arrayEqualsWithoutOrder(myRes, res) {
		t.Error("Policy: ", myRes, ", supposed to be ", res)
	}
}

func arrayEqualsWithoutOrder(a [][]string, b [][]string) bool {
	if len(a) != len(b) {
		return false
	}

	mapA := make(map[int]string)
	mapB := make(map[int]string)
	order := make(map[int]struct{})
	l := len(a)

	for i := 0; i < l; i++ {
		mapA[i] = util.ArrayToString(a[i])
		mapB[i] = util.ArrayToString(b[i])
	}

	for i := 0; i < l; i++ {
		for j := 0; j < l; j++ {
			if _, ok := order[j]; ok {
				if j == l-1 {
					return false
				} else {
					continue
				}
			}
			if mapA[i] == mapB[j] {
				order[j] = struct{}{}
				break
			} else if j == l-1 {
				return false
			}
		}
	}
	return true
}

func initPolicy(t *testing.T, dbURL string) {
	// Because the DB is empty at first,
	// so we need to load the policy from the file adapter (.CSV) first.
	e, err := casbin.NewEnforcer("examples/rbac_model.conf", "examples/rbac_policy.csv")
	if err != nil {
		panic(err)
	}

	a, err := NewAdapter(dbURL)
	if err != nil {
		panic(err)
	}
	// This is a trick to save the current policy to the DB.
	// We can't call e.SavePolicy() because the adapter in the enforcer is still the file adapter.
	// The current policy means the policy in the Casbin enforcer (aka in memory).
	err = a.SavePolicy(e.GetModel())
	if err != nil {
		panic(err)
	}

	// Clear the current policy.
	e.ClearPolicy()
	testGetPolicy(t, e, [][]string{})

	// Load the policy from DB.
	err = a.LoadPolicy(e.GetModel())
	if err != nil {
		panic(err)
	}
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)
}

func TestAdapter(t *testing.T) {
	initPolicy(t, getDbURL())

	// Note: you don't need to look at the above code
	// if you already have a working DB with policy inside.

	// Now the DB has policy, so we can provide a normal use case.
	// Create an adapter and an enforcer.
	// NewEnforcer() will load the policy automatically.
	a, err := NewAdapter(getDbURL())
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)
	// AutoSave is enabled by default.
	// Now we disable it.
	e.EnableAutoSave(false)
	// Because AutoSave is disabled, the policy change only affects the policy in Casbin enforcer,
	// it doesn't affect the policy in the storage.
	e.AddPolicy("alice", "data1", "write")
	// Reload the policy from the storage to see the effect.
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	// This is still the original policy.
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)

	// Now we enable the AutoSave.
	e.EnableAutoSave(true)

	// Because AutoSave is enabled, the policy change not only affects the policy in Casbin enforcer,
	// but also affects the policy in the storage.
	e.AddPolicy("alice", "data1", "write")
	// Reload the policy from the storage to see the effect.
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	// The policy has a new rule: {"alice", "data1", "write"}.
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
		{"alice", "data1", "write"},
	},
	)

	// Remove the added rule.
	e.RemovePolicy("alice", "data1", "write")
	if err := a.RemovePolicy("p", "p", []string{"alice", "data1", "write"}); err != nil {
		t.Errorf("Expected RemovePolicy() to be successful; got %v", err)
	}
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)

	// Remove "data2_admin" related policy rules via a filter.
	// Two rules: {"data2_admin", "data2", "read"}, {"data2_admin", "data2", "write"} are deleted.
	e.RemoveFilteredPolicy(0, "data2_admin")
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
	},
	)

	e.RemoveFilteredPolicy(1, "data1")
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{{"bob", "data2", "write"}})

	e.RemoveFilteredPolicy(2, "write")
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{})
}

func TestAddPolicies(t *testing.T) {
	initPolicy(t, getDbURL())

	a, err := NewAdapter(getDbURL())
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}

	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)
	a.AddPolicies("p", "p", [][]string{
		{"bob", "data2", "read"},
		{"alice", "data2", "write"},
		{"alice", "data2", "read"},
		{"bob", "data1", "write"},
		{"bob", "data1", "read"},
	},
	)

	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}

	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
		{"bob", "data2", "read"},
		{"alice", "data2", "write"},
		{"alice", "data2", "read"},
		{"bob", "data1", "write"},
		{"bob", "data1", "read"},
	},
	)

	// Remove the added rule.
	if err := a.RemovePolicies("p", "p", [][]string{
		{"bob", "data2", "read"},
		{"alice", "data2", "write"},
		{"alice", "data2", "read"},
		{"bob", "data1", "write"},
		{"bob", "data1", "read"},
	}); err != nil {
		t.Errorf("Expected RemovePolicies() to be successful; got %v", err)
	}
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)
}

func TestDeleteFilteredAdapter(t *testing.T) {
	a, err := NewFilteredAdapter(getDbURL() + "/casbin_test_new")
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_tenant_service.conf", a)
	if err != nil {
		panic(err)
	}

	e.AddPolicy("domain1", "alice", "data3", "read", "accept", "service1")
	e.AddPolicy("domain1", "alice", "data3", "write", "accept", "service2")

	// Reload the policy from the storage to see the effect.
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	// The policy has a new rule: {"alice", "data1", "write"}.
	testGetPolicy(t, e, [][]string{
		{"domain1", "alice", "data3", "read", "accept", "service1"},
		{"domain1", "alice", "data3", "write", "accept", "service2"},
	},
	)
	// test RemoveFiltered Policy with "" fileds
	e.RemoveFilteredPolicy(0, "domain1", "", "", "read")
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{
		{"domain1", "alice", "data3", "write", "accept", "service2"},
	},
	)

	e.RemoveFilteredPolicy(0, "domain1", "", "", "", "", "service2")
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{})
}

func TestFilteredAdapter(t *testing.T) {
	// Now the DB has policy, so we can provide a normal use case.
	// Create an adapter and an enforcer.
	// NewEnforcer() will load the policy automatically.
	a, err := NewFilteredAdapter(getDbURL())
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}

	// Load filtered policies from the database.
	e.AddPolicy("alice", "data1", "write")
	e.AddPolicy("bob", "data2", "write")
	// Reload the filtered policy from the storage.
	filter := &bson.M{"v0": "bob"}
	if err := e.LoadFilteredPolicy(filter); err != nil {
		t.Errorf("Expected LoadFilteredPolicy() to be successful; got %v", err)
	}
	// Only bob's policy should have been loaded
	testGetPolicy(t, e, [][]string{{"bob", "data2", "write"}})

	// Verify that alice's policy remains intact in the database.
	filter = &bson.M{"v0": "alice"}
	if err := e.LoadFilteredPolicy(filter); err != nil {
		t.Errorf("Expected LoadFilteredPolicy() to be successful; got %v", err)
	}
	// Only alice's policy should have been loaded,
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"alice", "data1", "write"},
	},
	)

	// Test safe handling of SavePolicy when using filtered policies.
	if err := e.SavePolicy(); err == nil {
		t.Errorf("Expected SavePolicy() to fail for a filtered policy")
	}
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	if err := e.SavePolicy(); err != nil {
		t.Errorf("Expected SavePolicy() to be successful; got %v", err)
	}

	e.RemoveFilteredPolicy(2, "write")
	if err := e.LoadPolicy(); err != nil {
		t.Errorf("Expected LoadPolicy() to be successful; got %v", err)
	}
	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"data2_admin", "data2", "read"},
	},
	)
}

func TestNewAdapterWithInvalidURL(t *testing.T) {
	defer func() {
		if r := recover(); r == nil {
			t.Error("Expected recovery from panic")
		}
	}()

	_, err := NewAdapter("localhost:40001?foo=1&bar=2")
	if err != nil {
		panic(err)
	}
}

func TestNewAdapterWithUnknownURL(t *testing.T) {
	defer func() {
		if r := recover(); r == nil {
			t.Error("Expected recovery from panic")
		}
	}()

	_, err := NewAdapter("fakeserver:27017")
	if err != nil {
		panic(err)
	}
}

func TestNewAdapterWithDatabase(t *testing.T) {
	_, err := NewAdapter(fmt.Sprint(getDbURL() + "/abc"))
	if err != nil {
		panic(err)
	}
}

func TestUpdatePolicy(t *testing.T) {
	initPolicy(t, getDbURL())

	a, err := NewAdapter(getDbURL())
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}

	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)
	testUpdatePolicy(t, a.(*adapter))
	testUpdatePolicies(t, a.(*adapter))
}

func testUpdatePolicy(t *testing.T, a *adapter) {
	// NewEnforcer() will load the policy automatically.
	e, _ := casbin.NewEnforcer("examples/rbac_model.conf", a)

	e.EnableAutoSave(true)
	e.UpdatePolicy([]string{"alice", "data1", "read"}, []string{"alice", "data1", "write"})
	e.LoadPolicy()
	testGetPolicy(t, e, [][]string{{"alice", "data1", "write"}, {"bob", "data2", "write"}, {"data2_admin", "data2", "read"}, {"data2_admin", "data2", "write"}})
}

func testUpdatePolicies(t *testing.T, a *adapter) {
	// NewEnforcer() will load the policy automatically.
	e, _ := casbin.NewEnforcer("examples/rbac_model.conf", a)

	e.EnableAutoSave(true)
	e.UpdatePolicies([][]string{{"alice", "data1", "write"}, {"bob", "data2", "write"}}, [][]string{{"alice", "data1", "read"}, {"bob", "data2", "read"}})
	e.LoadPolicy()
	testGetPolicy(t, e, [][]string{{"alice", "data1", "read"}, {"bob", "data2", "read"}, {"data2_admin", "data2", "read"}, {"data2_admin", "data2", "write"}})
}

func initUpdateFilteredPolicies(sec string, ptype string, newPolicies [][]string, fieldIndex int, fieldValues ...string) ([]CasbinRule, []CasbinRule, map[string]interface{}) {
	selector := make(map[string]interface{})
	selector["ptype"] = ptype

	if fieldIndex <= 0 && 0 < fieldIndex+len(fieldValues) {
		if fieldValues[0-fieldIndex] != "" {
			selector["v0"] = fieldValues[0-fieldIndex]
		}
	}
	if fieldIndex <= 1 && 1 < fieldIndex+len(fieldValues) {
		if fieldValues[1-fieldIndex] != "" {
			selector["v1"] = fieldValues[1-fieldIndex]
		}
	}
	if fieldIndex <= 2 && 2 < fieldIndex+len(fieldValues) {
		if fieldValues[2-fieldIndex] != "" {
			selector["v2"] = fieldValues[2-fieldIndex]
		}
	}
	if fieldIndex <= 3 && 3 < fieldIndex+len(fieldValues) {
		if fieldValues[3-fieldIndex] != "" {
			selector["v3"] = fieldValues[3-fieldIndex]
		}
	}
	if fieldIndex <= 4 && 4 < fieldIndex+len(fieldValues) {
		if fieldValues[4-fieldIndex] != "" {
			selector["v4"] = fieldValues[4-fieldIndex]
		}
	}
	if fieldIndex <= 5 && 5 < fieldIndex+len(fieldValues) {
		if fieldValues[5-fieldIndex] != "" {
			selector["v5"] = fieldValues[5-fieldIndex]
		}
	}

	oldLines := make([]CasbinRule, 0)
	newLines := make([]CasbinRule, 0, len(newPolicies))
	for _, newPolicy := range newPolicies {
		newLines = append(newLines, savePolicyLine(ptype, newPolicy))
	}
	return oldLines, newLines, selector
}

func TestUpdateFilteredPolicies(t *testing.T) {
	initPolicy(t, getDbURL())

	a, err := NewAdapter(getDbURL())
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}

	testGetPolicy(t, e, [][]string{
		{"alice", "data1", "read"},
		{"bob", "data2", "write"},
		{"data2_admin", "data2", "read"},
		{"data2_admin", "data2", "write"},
	},
	)

	initUpdateFilteredPolicies("p", "p", [][]string{{"alice", "data1", "write"}}, 0, "alice", "data1", "read")

	e.EnableAutoSave(true)
	e.UpdateFilteredPolicies([][]string{{"alice", "data1", "write"}}, 0, "alice", "data1", "read")
	e.UpdateFilteredPolicies([][]string{{"bob", "data2", "read"}}, 0, "bob", "data2", "write")
	e.LoadPolicy()
	testGetPolicyWithoutOrder(t, e, [][]string{{"alice", "data1", "write"}, {"bob", "data2", "read"}, {"data2_admin", "data2", "read"}, {"data2_admin", "data2", "write"}})
}

func TestNewAdapterWithWrongParams(t *testing.T) {
	func() {
		defer func() {
			if r := recover(); r == nil {
				t.Error("Expected recovery from panic")
			}

		}()

		_, _ = NewAdapter(nil)
	}()

	func() {
		defer func() {
			if r := recover(); r == nil {
				t.Error("Expected recovery from panic")
			}

		}()

		_, _ = NewAdapter(1)
	}()
}

func TestNewAdapterWithCollection(t *testing.T) {
	client, err := mongo.NewClient(options.Client().ApplyURI(getDbURI()))

	if err != nil {
		panic(err)
	}

	// connect
	_ = client.Connect(context.Background())

	defer func() {
		if r := recover(); r != nil {
			t.Error("Expected recovery from panic")
		}

		_ = client.Disconnect(context.Background())
	}()

	_, _ = NewAdapterWithCollection(client.Database("casbin_test").Collection("casbin_rule"))
}

func TestExtended(t *testing.T) {
	policies := [][3]string{
		{"", "/register", "POST"},
		{"", "/login", "POST"},
		{"", "/ping", "GET"},
		{"root", "/*", "*"},
		{"user", "/user", "GET"},
		{"god", "/god", "GET"},
	}

	t.Run("create", func(t *testing.T) {
		// Now the DB has policy, so we can provide a normal use case.
		// Create an adapter and an enforcer.
		// NewEnforcer() will load the policy automatically.
		a, _ := NewAdapter(getDbURI())

		e, err := casbin.NewEnforcer("examples/custom.conf", a)

		if err != nil {
			t.Error(err)
			panic(err)
		}

		// Clear all entries
		e.ClearPolicy()

		// Save empty list
		_ = e.SavePolicy()

		// Now we enable the AutoSave.
		e.EnableAutoSave(true)

		for index, policy := range policies {
			ok, err := e.AddPolicy(policy[0], policy[1], policy[2])

			assert.True(t, ok, "returns false @ index %d", index)
			assert.NoError(t, err, "returns error @ index %d", index)
		}

		var ok, vv bool

		vv = e.HasPolicy("", "/register", "POST")
		assert.True(t, vv, "blubb")

		vv = e.HasPolicy("god", "/god", "GET")
		assert.True(t, vv, "blubb")

		ok, err = e.AddPolicy("god", "/god", "GET")
		assert.False(t, ok, "blubb")
		assert.NoError(t, err, "Haha")

		t.Run("test", func(t *testing.T) {
			a, _ := NewAdapter(getDbURI())

			e, err := casbin.NewEnforcer("examples/custom.conf", a)

			if err != nil {
				t.Error(err)
				panic(err)
			}

			// Test add polices again
			for index, policy := range policies {
				ok, err := e.AddPolicy(policy[0], policy[1], policy[2])

				assert.False(t, ok, "returns true @ index %d", index)
				assert.NoError(t, err, "returns error @ index %d", index)
			}

			var vv bool

			vv = e.HasPolicy("", "/register", "POST")
			assert.True(t, vv, "blubb")

			vv = e.HasPolicy("god", "/god", "GET")
			assert.True(t, vv, "blubb")
		})
	})

}