feat(13-03): implement TerraformSource and HelmSource

- Terraform searches registry.terraform.io v1 modules API with namespace/name/provider URLs
- Helm searches artifacthub.io for charts (kind=0) with repo/chart URL construction
- Both sources: context cancellation, nil registry, httptest-based tests

pkg/recon/sources/terraform_test.go

@@ -0,0 +1,190 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+func terraformStubHandler(t *testing.T, calls *int32) http.HandlerFunc {
+	t.Helper()
+	return func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt32(calls, 1)
+		if r.URL.Path != "/v1/modules" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+		if r.URL.Query().Get("q") == "" {
+			t.Errorf("missing q param")
+		}
+		body := terraformSearchResponse{
+			Modules: []terraformModule{
+				{
+					ID:        "hashicorp/openai/aws",
+					Namespace: "hashicorp",
+					Name:      "openai",
+					Provider:  "aws",
+				},
+				{
+					ID:        "community/llm-gateway/azure",
+					Namespace: "community",
+					Name:      "llm-gateway",
+					Provider:  "azure",
+				},
+			},
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(body)
+	}
+}
+
+func TestTerraform_SweepEmitsFindings(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("terraform", 1000, 100)
+
+	var calls int32
+	srv := httptest.NewServer(terraformStubHandler(t, &calls))
+	defer srv.Close()
+
+	src := &TerraformSource{
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 32)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() { done <- src.Sweep(ctx, "", out); close(out) }()
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if err := <-done; err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	// 2 keywords * 2 modules = 4 findings
+	if len(findings) != 4 {
+		t.Fatalf("expected 4 findings, got %d", len(findings))
+	}
+	for _, f := range findings {
+		if f.SourceType != "recon:terraform" {
+			t.Errorf("SourceType=%q want recon:terraform", f.SourceType)
+		}
+	}
+	if got := atomic.LoadInt32(&calls); got != 2 {
+		t.Errorf("expected 2 server calls, got %d", got)
+	}
+}
+
+func TestTerraform_ModuleURLConstruction(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("terraform", 1000, 100)
+
+	var calls int32
+	srv := httptest.NewServer(terraformStubHandler(t, &calls))
+	defer srv.Close()
+
+	src := &TerraformSource{
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 32)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() { done <- src.Sweep(ctx, "", out); close(out) }()
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if err := <-done; err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	// Verify URL contains namespace/name/provider structure.
+	hasHashicorp := false
+	hasCommunity := false
+	for _, f := range findings {
+		if contains(f.Source, "/modules/hashicorp/openai/aws") {
+			hasHashicorp = true
+		}
+		if contains(f.Source, "/modules/community/llm-gateway/azure") {
+			hasCommunity = true
+		}
+	}
+	if !hasHashicorp {
+		t.Error("expected finding with hashicorp/openai/aws module URL")
+	}
+	if !hasCommunity {
+		t.Error("expected finding with community/llm-gateway/azure module URL")
+	}
+}
+
+func TestTerraform_EnabledAlwaysTrue(t *testing.T) {
+	s := &TerraformSource{}
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("expected Enabled=true")
+	}
+}
+
+func TestTerraform_NameAndRate(t *testing.T) {
+	s := &TerraformSource{}
+	if s.Name() != "terraform" {
+		t.Errorf("unexpected name: %s", s.Name())
+	}
+	if s.Burst() != 2 {
+		t.Errorf("burst: %d", s.Burst())
+	}
+	if s.RespectsRobots() {
+		t.Error("expected RespectsRobots=false")
+	}
+}
+
+func TestTerraform_CtxCancelled(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("terraform", 1000, 100)
+
+	src := &TerraformSource{
+		BaseURL:  "http://127.0.0.1:1",
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	out := make(chan recon.Finding, 1)
+	err := src.Sweep(ctx, "", out)
+	if !errors.Is(err, context.Canceled) {
+		t.Fatalf("expected context.Canceled, got %v", err)
+	}
+}
+
+func TestTerraform_NilRegistryNoError(t *testing.T) {
+	src := &TerraformSource{Client: NewClient()}
+	out := make(chan recon.Finding, 1)
+	if err := src.Sweep(context.Background(), "", out); err != nil {
+		t.Fatalf("expected nil, got %v", err)
+	}
+}