WIP: On week ai refacotor tests log generation

AGENTS.md

@@ -0,0 +1,143 @@
+---
+applyTo: '**'
+---
+
+# Context
+- Senior Software Engineer with years experience (Go expert)
+- Assume expert-level knowledge of languages, frameworks, tools, best practices
+- Provide detailed technical responses without oversimplifying
+- Show architectural/design considerations and security implications
+- When code is requested, provide code only unless explanations are explicitly asked
+
+# Project Structure
+- The repo conteins several "Bears", which are compoiles as standalone binaryes
+- All Beats are built on top of a common framework, `libbeat`
+- OSS Beats (root level): `auditbeat/`, `filebeat/`, `heartbeat/`, `metricbeat/`, `packetbeat/`, `winlogbeat/`
+- Elastic-licensed Beats: under `x-pack/` folder (e.g., `x-pack/osquerybeat/`)
+- Shared framework: `libbeat/` - common interfaces, processors, outputs, pipeline, publisher. Follows same licensing scheme as individual Beats
+- NEVER import Elastic-licensed code (`x-pack/`) into OSS code
+- Build/dev tools: `dev-tools/` - mage build system, packaging templates, testing utilities
+- Documentation: `docs/` - markdown documentation
+- Testing infrastructure: `testing/` - test utilities, environments, terraform configs
+- Integration tests: `tests/` folder in each Beat. Some Beats also have `testing/` folder - these map to different testing frameworks in `libbeat`
+- When modifying a Beat: check both OSS version (root) and x-pack version (if it exists in `x-pack/`)
+- Config files: Beat root and module directories contain `.yml`, `.yaml` config files
+- Current Beats version is in `libbeat/version/version.go:20`
+- Documentation for Beats version < 9.0.0 is in AsciiDoc format
+
+## Automation
+- [Mage](https://magefile.org/) is used for project automation
+- Common commands (run in Beat folder): `mage update` (regenerate files), `mage build` (compile), `mage check` (format, update, validate), `mage unitTest` (run tests), `mage clean` (remove build artifacts)
+- After code changes: run `mage update` first if modifying fields/configs, then `mage check` for validation
+- Root-level commands: `mage fmt` (format all), `mage unitTest` (test all Beats), `mage checkLicenseHeaders` (validate headers)
+- Legacy Makefile targets exist for compatibility but Mage is preferred
+- Never run mage targets like `test`, `unitTest`, `goIntegTest`, etc. without explicitly stating intent and asking for confirmation. These commands run the entire test suite, which can take a very long time.
+
+# Communication
+- Direct, honest, no sugar-coating
+- Correct mistakes immediately, challenge incorrect assumptions
+- Precise language, eliminate unnecessary words
+- Be concise - avoid fluff, sacrifice grammar for conciseness
+- Avoid speculation - state when unsure, suggest research methods
+- Ask clarifying questions when requirements are vague
+
+# Code References & Precision
+- Format: `filepath:line_number` or `filepath:start-end` (ALWAYS exact locations)
+- Never: "around line X", "similar to", vague references
+- Always: specific element names (functions, classes, methods, variables)
+- Quote exact text from code/logs - zero paraphrasing
+- Read entire files, check related files (imports, dependencies, config)
+- Trace execution flow across multiple files
+- Identify ALL instances of patterns, provide multiple examples
+- Reference exact variable names, function calls, error codes
+- Never use approximations ("around", "similar to")
+
+# Problem-Solving Workflow
+1. Root cause analysis: reference exact files:line, provide evidence chain (symptoms → causes), quantify frequency/severity
+2. Present 2-3 solution options with pros/cons, highlight recommended option
+3. Wait for confirmation before implementing
+4. Implementation: complete function/method modifications (never fragments), all imports/dependencies, exact config changes with parameter names/values, before/after comparisons, exact line numbers
+5. Verification: provide exact commands and expected outputs, include tests with exact test names, use reverse logic to confirm resolution
+
+# Code Changes
+- Check workspace folders before suggesting changes, verify file existence/structure
+- State which files/folders changes apply to, provide full file paths
+- If file doesn't exist, clearly state it must be created and where
+- When user claims fixes implemented: verify changes align with discussion, point out discrepancies with exact locations
+- Maintain consistency with existing codebase patterns
+- Always ensure the application complies, both versions, the OSS and the one in the `x-pack` folder.
+
+# Log Analysis
+Four-pass method: Overview → Error Focus → Context Analysis → Cross-Reference
+- Search: exact error messages, variable/function names, state transitions (start/stop/fail/success)
+- Patterns: correlation IDs, request IDs, session IDs, timestamps, user IDs
+- Levels: error, warn, info, debug
+- Parse structured logs (JSON) for complete context
+- Track event sequences with timestamp ranges/frequency, find anomalies, track state changes
+
+# Response Standards
+- Always provide solutions when discussing errors - never just diagnose
+- Include specific files and line numbers for fixes
+- Don't wait to be asked for implementation details
+- If answer unknown, state clearly and suggest research methods
+- Exact matches, precise quotes, specific counts, measurements
+
+# Output
+- Save intermediate markdown to `.tmp-ai-io` folder (exclude from git)
+- Optimize .md files for token efficiency - concise, minimal formatting, no emojis
+- At end of each plan, list unresolved questions if any
+- Take time to think through problems - thorough, precise answers
+- Solve step-by-step
+
+# Go Code Standards
+
+## General
+- Follow Go best practices and idiomatic style from "Effective Go"
+- Maintain consistency with existing codebase patterns
+- Write clear, self-documenting code with meaningful variable names
+- Add comments for complex logic or non-obvious behavior
+- Prefer explicit error handling over silent failures
+- Use `any` instead of `interface{}`
+- For all .go files edited, ALWAYS add `// This file was contributed to by generative AI` below license header if not already present
+- When you're done, run `mage fmt` to ensure all changes are correctly formated and the imports are correct
+
+## Style
+- Use the "Effective Go" formatting standards
+- Follow project's existing naming conventions
+- Keep functions focused and single-purpose
+- Prefer composition over inheritance
+- Use interfaces for abstraction
+
+## Error Handling
+- Always handle errors explicitly; never ignore them
+- Return errors from functions when operations can fail
+- Use descriptive error messages with context
+- Wrap errors with additional context when propagating
+
+## Testing
+- Write unit tests for new functionality
+- Use table-driven tests when appropriate
+- Follow existing test patterns in codebase
+- Ensure tests are deterministic, don't rely on external state
+- Only use `t.Helper()` on functions whose goal is to make assertions
+- Use `t.Context()` instead of `context.Background()`
+- Use testify for assertions. Prefer `assert.*`,`require.*` is for fatal erros ONLY
+- When using testify assertions (assert.*, require.*), always include context messages as last argument
+
+## Performance
+- Consider performance implications for hot paths
+- Use appropriate data structures for use case
+- Avoid premature optimization
+- Profile before optimizing
+
+## Documentation
+- Document exported functions and types
+- Keep comments concise, focused on "why" not "what"
+- Update documentation when changing behavior
+
+## Project-Specific
+- OSS beats are in the root folder, the ones in `x-pack` are Elastic licensed.
+- Follow Elastic Beats module structure conventions
+- Maintain compatibility with existing Beat interfaces
+- Consider cross-platform compatibility (Linux, Windows, macOS)
+- Follow project's module and package organization patterns

filebeat/input/filestream/fswatch_integration_test.go

@@ -25,6 +25,7 @@ import (
 	"testing"
 
 	loginp "github.com/elastic/beats/v7/filebeat/input/filestream/internal/input-logfile"
+	"github.com/elastic/beats/v7/filebeat/testhelpers"
 	"github.com/elastic/beats/v7/libbeat/tests/integration"
 	"github.com/elastic/elastic-agent-libs/logp/logptest"
 )
@@ -41,7 +42,7 @@ func TestFileWatcherNotifications(t *testing.T) {
 			//  - closedHarvesters is empty at the end of this scan
 
 			// Write to the file, so we get a write operation
-			integration.WriteLogFile(t, logFilePath, 10, true)
+			testhelpers.WriteLogFile(t, logFilePath, 10, true)
 			fw.watch(t.Context())
 			evt = <-fw.events
 			requireOperation(t, evt, loginp.OpWrite)
@@ -180,7 +181,7 @@ func TestFileWatcherNotifications(t *testing.T) {
 
 			// Create a 3000 bytes file
 			logFilePath := filepath.Join(dir, "log.log")
-			integration.WriteLogFile(t, logFilePath, 50, false)
+			testhelpers.WriteLogFile(t, logFilePath, 50, false)
 
 			cfg := defaultFileWatcherConfig()
 			fw, err := newFileWatcher(

filebeat/input/filestream/input_integration_test.go

@@ -37,7 +37,8 @@
 	"golang.org/x/text/encoding/unicode"
 	"golang.org/x/text/transform"
 
+	"github.com/elastic/beats/v7/filebeat/testhelpers"
 	"github.com/elastic/beats/v7/libbeat/tests/integration"
 )
 
 // test_close_renamed from test_harvester.py
@@ -1178,7 +1179,7 @@
 	// Escape windows path separator
 	logFilePathStr := strings.ReplaceAll(logFilePath, `\`, `\\`)
 
-	integration.WriteLogFile(t, logFilePath, 50, false)
+	testhelpers.WriteLogFile(t, logFilePath, 50, false)
 
 	id := "fake-ID-" + uuid.Must(uuid.NewV4()).String()
 	// The duration used to configure the input need to obey
@@ -1218,7 +1219,7 @@
 
 	// Add more data to the file while the reader is blocked
 	// on its backoff and its context has been cancelled.
-	integration.WriteLogFile(t, logFilePath, 5, true)
+	testhelpers.WriteLogFile(t, logFilePath, 5, true)
 
 	// Ensure the FileWatcher detected the new data and sent a write event
 	env.WaitLogsContains(

filebeat/testing/integration/helper.go → filebeat/testhelpers/helper.go

@@ -15,7 +15,9 @@
 // specific language governing permissions and limitations
 // under the License.
 
-package integration
+// This file was contributed to by generative AI
+
+package testhelpers
 
 import (
 	"bufio"
@@ -32,7 +34,7 @@ import (
 // false is returned. It will fail the test on any error reading/parsing
 // the registry file.
 func AssertLastOffset(t *testing.T, path string, offset int) bool {
-	entries, _ := readFilestreamRegistryLog(t, path)
+	entries, _ := ReadFilestreamRegistryLog(t, path)
 	lastEntry := entries[len(entries)-1]
 	if lastEntry.Offset != offset {
 		t.Errorf("expecting offset %d got %d instead", offset, lastEntry.Offset)
@@ -53,7 +55,7 @@ func AssertLastOffset(t *testing.T, path string, offset int) bool {
 	return true
 }
 
-type registryEntry struct {
+type RegistryEntry struct {
 	Key      string
 	Offset   int
 	EOF      bool
@@ -63,13 +65,14 @@ type registryEntry struct {
 	Removed  bool
 }
 
-func readFilestreamRegistryLog(t *testing.T, path string) ([]registryEntry, map[string]string) {
+func ReadFilestreamRegistryLog(t *testing.T, path string) ([]RegistryEntry, map[string]string) {
 	file, err := os.Open(path)
 	if err != nil {
 		t.Fatalf("could not open file '%s': %s", path, err)
 	}
+	defer file.Close()
 
-	var entries []registryEntry
+	var entries []RegistryEntry
 	fileNameToNative := map[string]string{}
 	s := bufio.NewScanner(file)
 
@@ -89,7 +92,7 @@ func readFilestreamRegistryLog(t *testing.T, path string) ([]registryEntry, map[
 			continue
 		}
 		// Filestream entry
-		et := registryEntry{
+		et := RegistryEntry{
 			Key:      e.Key,
 			Offset:   e.Value.Cursor.Offset,
 			EOF:      e.Value.Cursor.EOF,