Jan Novak
a9534ec2c1
Extract run(args, stdout, stderr) int from main() for in-process testability. Fix TLS failure classification (tlsErr now captured from TLSHandshakeDone hook). Add run_test.go with 14 table-driven in-process tests and cli_test.go with TestMain + 3 subprocess smoke tests. All servers use httptest; .invalid TLD for deterministic DNS failures. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
74 lines
3.2 KiB
Markdown
74 lines
3.2 KiB
Markdown
# Changelog
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All completed features are logged here in reverse-chronological order.
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---
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## 2026-07-01 00:49 — Integration tests (Go, Step 6)
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- Extracted `run(args, stdout, stderr) int` from `main()` to make the CLI testable in-process
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- Fixed TLS classification bug: `TLSHandshakeDone` fires with the error on cert rejection, so `tlsErr` is now captured and checked before the stale `tlsStart.IsZero()` guard
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- `run_test.go`: 14 in-process tests covering exit codes 0–6, multi-URL, sampling, and JSON structure assertions
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- `cli_test.go`: `TestMain` builds the real binary; 3 subprocess smoke tests exercise the actual `os.Exit` path
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- All test servers use `httptest` + stdlib; `.invalid` TLD for deterministic DNS failures; no external network dependency
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---
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## 2026-07-01 00:38 — Failure handling (Go, Step 5)
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- Classified network failures into `dns` / `connect` / `timeout` / `tls` with distinct exit codes (2–5)
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- Partial timing preserved up to the failure point (e.g. DNS phase shown on NXDOMAIN)
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- `--timeout` flag (default 10s) applied via `context.WithTimeout`
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- `--fail` flag: HTTP status ≥ 400 → exit code 6 (curl-style)
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- `-n` sampling continues on network failure; aggregates successes, reports fail count + cause
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- JSON output extended with `succeeded`, `failed`, `errors[]` fields
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- Highest exit code across all URLs/failure types is used as the process exit
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---
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## 2026-07-01 00:08 — JSON output flag (Go, Step 4)
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- `--json` flag emits a JSON array with one entry per URL
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- Schema always uses min/avg/max shape (consistent regardless of `-n`)
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- Phases absent from the request (e.g. TLS on HTTP) are omitted from the JSON object
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- Failed URLs are excluded from JSON output and reported to stderr
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- Text output unchanged and remains the default
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---
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## 2026-07-01 00:08 — Multiple URLs + sampling (Go, Step 3)
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- `-n`/`--count` flag repeats each URL N times and reports min/avg/max per phase
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- `probe.Summarize` aggregates a slice of Results into per-phase PhaseStats
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- Multi-sample output shows an aligned min/avg/max table with a header row
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- Single-sample output (n=1) is unchanged from Step 2
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---
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## 2026-07-01 00:08 — Per-phase breakdown (Go, Step 2)
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- Instrumented requests with `net/http/httptrace.ClientTrace`
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- DNS lookup, TCP connect, TLS handshake, Server/TTFB, Transfer, Total phases
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- TLS row omitted automatically for plain `http://` URLs
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- Aligned text output with separator before Total
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---
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## 2026-07-01 00:08 — Simple total latency (Go, Step 1)
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- `probe.Measure` performs an HTTP GET and records wall-clock total time
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- `main.go` prints URL, HTTP status code, and total duration for each URL
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- Exits with code 1 if any URL fails
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- Multiple URLs accepted as positional arguments
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---
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## 2026-07-01 00:08 — Project scaffold (Go, Step 0)
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- Created project structure: `go/`, `python/`, `docs/plans/`, `docs/usage/`
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- Initialised Go module `latprobe` (`go/go.mod`)
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- Minimal `go/main.go` that prints usage and exits cleanly when no URL is given
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- Stub `go/internal/probe/probe.go` defining the `Result` type and `Measure` signature
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- Foundation files: `README.md`, `CLAUDE.md`, `CHANGELOG.md`
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- Saved initial plan to `docs/plans/2026-07-01-00-08-go-latency-tool.md`
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