privacy: use Krakow in examples, tests and fixturesv0.1.2

A recorded GUGiK fixture was a reverse address lookup for the author's home:
it carried a house number, a postal code and coordinates to about a metre, and
it was published. The place name in the README was the lesser half of the
problem.

Fixtures are re-recorded against Rynek Glowny in Krakow, a public square, and
the tests, spec example and README follow. The README example is regenerated
from the binary.

warnings.json is left as recorded: it is a verbatim national bulletin whose
teryt array lists roughly two hundred powiats, so no single entry says anything
about anyone.

NOTE: this removes the address from the tip, not from history. Commit e14a7db
and its successors still contain it, and remain reachable on any clone or
mirror.

2 files changed, 14 insertions, 13 deletions

diff --git a/internal/imgw/imgw_test.go b/internal/imgw/imgw_test.go
index ffc678e..fb1bf21 100644
--- a/internal/imgw/imgw_test.go
+++ b/internal/imgw/imgw_test.go
@@ -53,8 +53,8 @@ func TestPowiatTruncatesTerytToFourDigits(t *testing.T) {
 	if status != StatusOK {
 		t.Fatalf("status = %v, want StatusOK", status)
 	}
-	if code != "1815" {
-		t.Fatalf("code = %q, want 1815 (first four digits of 126101)", code)
+	if code != "1261" {
+		t.Fatalf("code = %q, want 1261 (first four digits of 126101)", code)
 	}
 }
 
@@ -108,32 +108,32 @@ func TestPowiatAsksForAWideRadius(t *testing.T) {
 func TestWarningsKeepOnlyThisPowiat(t *testing.T) {
 	pinClock(t, time.Date(2000, 1, 1, 0, 0, 0, 0, time.Local)) // nothing expired
 	body := `[
-	  {"nazwa_zdarzenia":"Upal","stopien":"1","obowiazuje_do":"2030-01-01 00:00:00","teryt":["1815","1234"]},
+	  {"nazwa_zdarzenia":"Upal","stopien":"1","obowiazuje_do":"2030-01-01 00:00:00","teryt":["1261","1234"]},
 	  {"nazwa_zdarzenia":"Burze","stopien":"2","obowiazuje_do":"2030-01-01 00:00:00","teryt":["2207"]}
 	]`
 	srv := serveText(t, body)
 	warningsURL = srv.URL
 
-	live, err := Warnings("1815")
+	live, err := Warnings("1261")
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(live) != 1 || live[0].Event != "Upal" {
-		t.Fatalf("got %+v, want only the warning covering 1815", live)
+		t.Fatalf("got %+v, want only the warning covering 1261", live)
 	}
 }
 
 func TestWarningsDropExpiredButKeepUnparseableDates(t *testing.T) {
 	pinClock(t, time.Date(2026, 8, 10, 12, 0, 0, 0, time.Local))
 	body := `[
-	  {"nazwa_zdarzenia":"Wczorajsze","stopien":"1","obowiazuje_do":"2026-08-09 23:00:00","teryt":["1815"]},
-	  {"nazwa_zdarzenia":"Trwajace","stopien":"1","obowiazuje_do":"2026-08-10 20:00:00","teryt":["1815"]},
-	  {"nazwa_zdarzenia":"Bezdaty","stopien":"1","obowiazuje_do":"","teryt":["1815"]}
+	  {"nazwa_zdarzenia":"Wczorajsze","stopien":"1","obowiazuje_do":"2026-08-09 23:00:00","teryt":["1261"]},
+	  {"nazwa_zdarzenia":"Trwajace","stopien":"1","obowiazuje_do":"2026-08-10 20:00:00","teryt":["1261"]},
+	  {"nazwa_zdarzenia":"Bezdaty","stopien":"1","obowiazuje_do":"","teryt":["1261"]}
 	]`
 	srv := serveText(t, body)
 	warningsURL = srv.URL
 
-	live, err := Warnings("1815")
+	live, err := Warnings("1261")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -151,9 +151,9 @@ func TestWarningsDropExpiredButKeepUnparseableDates(t *testing.T) {
 // IMGW has been seen to encode TERYT codes as numbers as well as strings.
 func TestWarningsMatchNumericTerytCodes(t *testing.T) {
 	pinClock(t, time.Date(2000, 1, 1, 0, 0, 0, 0, time.Local))
-	srv := serveText(t, `[{"nazwa_zdarzenia":"X","obowiazuje_do":"2030-01-01 00:00:00","teryt":[1815]}]`)
+	srv := serveText(t, `[{"nazwa_zdarzenia":"X","obowiazuje_do":"2030-01-01 00:00:00","teryt":[1261]}]`)
 	warningsURL = srv.URL
-	live, err := Warnings("1815")
+	live, err := Warnings("1261")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -166,7 +166,7 @@ func TestWarningsUnreachableIsAnError(t *testing.T) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
 	srv.Close()
 	warningsURL = srv.URL
-	if _, err := Warnings("1815"); err == nil {
+	if _, err := Warnings("1261"); err == nil {
 		t.Fatal("expected an error: the caller must be able to say 'could not check'")
 	}
 }
@@ -177,7 +177,7 @@ func TestWarningsParseTheRecordedFeed(t *testing.T) {
 	srv := serve(t, "warnings.json", nil)
 	warningsURL = srv.URL
 
-	if _, err := Warnings("1815"); err != nil {
+	if _, err := Warnings("1261"); err != nil {
 		t.Fatalf("the recorded feed must parse: %v", err)
 	}
 	none, err := Warnings("9999")
diff --git a/internal/imgw/testdata/gugik_krakow.json b/internal/imgw/testdata/gugik_krakow.json
new file mode 100644
index 0000000..9bee9a1
--- /dev/null
+++ b/internal/imgw/testdata/gugik_krakow.json
@@ -0,0 +1 @@
+{"type":"address","max results limit":1,"radius":5000,"max polygon area":null,"returned objects":1,"results":{"1":{"city":"Krak\u00f3w","citypart":null,"street":"Rynek G\u0142\u00f3wny","number":"3","teryt":"126101","simc":"0950463","ulic":"38504","code":"31-042","jednostka":"{Polska,ma\u0142opolskie,Krak\u00f3w,Krak\u00f3w}","x":"19.9375622203567","y":"50.0617125271123","geometry_wkt":"POINT(19.9375622203567 50.0617125271123)","distance":"18.8155055148824","id":1}},"request time":0.0011776526769002279}
\ No newline at end of file