add basic test

pkg/security/tests/fim_test.go

@@ -0,0 +1,53 @@
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2016-present Datadog, Inc.
+
+//go:build linux && functionaltests
+
+// Package tests holds tests related files
+package tests
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/DataDog/datadog-agent/pkg/security/secl/model"
+	"github.com/DataDog/datadog-agent/pkg/security/secl/rules"
+)
+
+func TestFIMOpen(t *testing.T) {
+	SkipIfNotAvailable(t)
+
+	ruleDefs := []*rules.RuleDefinition{
+		{
+			ID:         "test_fim_rule",
+			Expression: `fim.write.file.path == "{{.Root}}/test-open"`,
+		},
+	}
+
+	test, err := newTestModule(t, nil, ruleDefs)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer test.Close()
+
+	testFile, _, err := test.Path("test-open")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(testFile)
+
+	test.WaitSignal(t, func() error {
+		f, err := os.Create(testFile)
+		if err != nil {
+			return err
+		}
+		return f.Close()
+	}, func(event *model.Event, _ *rules.Rule) {
+		assert.Equal(t, "open", event.GetType(), "wrong event type")
+		assertInode(t, event.Open.File.Inode, getInode(t, testFile))
+	})
+}