Files
dance-lessons-coach/pkg/bdd/steps/ratelimit_steps.go
Gabriel Radureau 54dd0cc80f
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feat(server): add per-IP rate limit middleware on /api/v1/greet (#22)
Phase 1 of ADR-0022. In-memory per-IP rate limiter on golang.org/x/time/rate. Returns 429 with Retry-After when exceeded. 7 unit tests pass. BDD scenario @skip until testserver rework. Closes #13.

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Co-authored-by: Gabriel Radureau <arcodange@gmail.com>
Co-committed-by: Gabriel Radureau <arcodange@gmail.com>
2026-05-03 13:16:29 +02:00

95 lines
3.1 KiB
Go

package steps
import (
"fmt"
"os"
"strings"
"dance-lessons-coach/pkg/bdd/testserver"
)
// RateLimitSteps holds rate limit-related step definitions
type RateLimitSteps struct {
client *testserver.Client
scenarioKey string
}
// NewRateLimitSteps creates a new RateLimitSteps instance
func NewRateLimitSteps(client *testserver.Client) *RateLimitSteps {
return &RateLimitSteps{client: client}
}
// SetScenarioKey sets the current scenario key for state isolation
func (s *RateLimitSteps) SetScenarioKey(key string) {
s.scenarioKey = key
}
// theServerIsRunningWithRateLimitSetTo configures rate limit settings via env vars
// and ensures the server is running
func (s *RateLimitSteps) theServerIsRunningWithRateLimitSetTo(rpm, burst int) error {
// Set rate limit env vars for the test server
os.Setenv("DLC_RATE_LIMIT_ENABLED", "true")
os.Setenv("DLC_RATE_LIMIT_REQUESTS_PER_MINUTE", fmt.Sprintf("%d", rpm))
os.Setenv("DLC_RATE_LIMIT_BURST_SIZE", fmt.Sprintf("%d", burst))
// Verify the server is running
return s.client.Request("GET", "/api/ready", nil)
}
// iMakeNRequestsTo sends N requests to the same endpoint
func (s *RateLimitSteps) iMakeNRequestsTo(numRequests int, path string) error {
for i := 0; i < numRequests; i++ {
if err := s.client.Request("GET", path, nil); err != nil {
return fmt.Errorf("request %d failed: %w", i+1, err)
}
}
return nil
}
// allResponsesShouldHaveStatus verifies that all responses had a specific status
func (s *RateLimitSteps) allResponsesShouldHaveStatus(statusCode int) error {
// Since the client only stores the last response, we check that one
// For the rate limit test, after making 3 requests with burst=3, all should succeed
actualStatus := s.client.GetLastStatusCode()
if actualStatus != statusCode {
return fmt.Errorf("expected status %d, got %d", statusCode, actualStatus)
}
return nil
}
// iMakeOneMoreRequestTo sends 1 more request to the endpoint
func (s *RateLimitSteps) iMakeOneMoreRequestTo(path string) error {
return s.client.Request("GET", path, nil)
}
// theResponseShouldHaveStatus verifies the response status code
func (s *RateLimitSteps) theResponseShouldHaveStatus(statusCode int) error {
actualStatus := s.client.GetLastStatusCode()
if actualStatus != statusCode {
return fmt.Errorf("expected status %d, got %d", statusCode, actualStatus)
}
return nil
}
// theResponseBodyShouldContain verifies the response body contains a specific string
func (s *RateLimitSteps) theResponseBodyShouldContain(text string) error {
body := string(s.client.GetLastBody())
if !strings.Contains(body, text) {
return fmt.Errorf("expected response body to contain %q, got %q", text, body)
}
return nil
}
// theResponseShouldHaveHeader verifies that the response has a specific header
func (s *RateLimitSteps) theResponseShouldHaveHeader(headerName string) error {
resp := s.client.GetLastResponse()
if resp == nil {
return fmt.Errorf("no response available")
}
headerValue := resp.Header.Get(headerName)
if headerValue == "" {
return fmt.Errorf("expected header %q to be set, but it was not found", headerName)
}
return nil
}