update

2026-07-26 13:01:07 +02:00
1 parent 540aa48c44
commit bd81f4ff54
@@ -0,0 +1,165 @@
+package region
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestDefaultConfig(t *testing.T) {
+	cfg := DefaultConfig()
+	if len(cfg.Regions) != 2 {
+		t.Fatalf("expected 2 default regions, got %d", len(cfg.Regions))
+	}
+
+	if got := cfg.CurrencyOf("se"); got != "SEK" {
+		t.Errorf("CurrencyOf(se) = %s, want SEK", got)
+	}
+	if got := cfg.LocaleOf("se"); got != "sv-se" {
+		t.Errorf("LocaleOf(se) = %s, want sv-se", got)
+	}
+	if got := cfg.CurrencyOf("no"); got != "NOK" {
+		t.Errorf("CurrencyOf(no) = %s, want NOK", got)
+	}
+	if got := cfg.LocaleOf("no"); got != "nb-no" {
+		t.Errorf("LocaleOf(no) = %s, want nb-no", got)
+	}
+}
+
+func TestCurrencyOf(t *testing.T) {
+	cfg := DefaultConfig()
+
+	tests := []struct {
+		country string
+		want    string
+	}{
+		{"se", "SEK"},
+		{"SE", "SEK"},
+		{"no", "NOK"},
+		{"NO", "NOK"},
+		{"dk", "SEK"},   // unknown → default
+		{"fi", "SEK"},   // unknown → default
+		{"us", "SEK"},   // unknown → default
+		{"", "SEK"},     // empty → default
+	}
+	for _, tt := range tests {
+		t.Run(tt.country, func(t *testing.T) {
+			if got := cfg.CurrencyOf(tt.country); got != tt.want {
+				t.Errorf("CurrencyOf(%q) = %q, want %q", tt.country, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestLocaleOf(t *testing.T) {
+	cfg := DefaultConfig()
+
+	tests := []struct {
+		country string
+		want    string
+	}{
+		{"se", "sv-se"},
+		{"SE", "sv-se"},
+		{"no", "nb-no"},
+		{"NO", "nb-no"},
+		{"dk", "sv-se"},  // unknown → default
+		{"", "sv-se"},    // empty → default
+	}
+	for _, tt := range tests {
+		t.Run(tt.country, func(t *testing.T) {
+			if got := cfg.LocaleOf(tt.country); got != tt.want {
+				t.Errorf("LocaleOf(%q) = %q, want %q", tt.country, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestCountryFromCurrency(t *testing.T) {
+	cfg := DefaultConfig()
+
+	tests := []struct {
+		currency string
+		want    string
+	}{
+		{"SEK", "se"},
+		{"sek", "se"},
+		{"NOK", "no"},
+		{"nok", "no"},
+		{"DKK", "se"},   // unknown → default
+		{"EUR", "se"},   // unknown → default
+		{"", "se"},      // empty → default
+	}
+	for _, tt := range tests {
+		t.Run(tt.currency, func(t *testing.T) {
+			if got := cfg.CountryFromCurrency(tt.currency); got != tt.want {
+				t.Errorf("CountryFromCurrency(%q) = %q, want %q", tt.currency, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestLoadConfig_FileNotFound(t *testing.T) {
+	cfg, err := LoadConfig("/nonexistent/regions.json")
+	if err != nil {
+		t.Fatalf("LoadConfig on missing file should not error: %v", err)
+	}
+	if cfg == nil {
+		t.Fatal("expected non-nil config on missing file")
+	}
+	if len(cfg.Regions) != 2 {
+		t.Errorf("expected 2 default regions, got %d", len(cfg.Regions))
+	}
+}
+
+func TestLoadConfig_CustomFile(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "regions.json")
+	content := `{
+		"regions": [
+			{"countryCode": "se", "currency": "SEK", "locale": "sv-se"},
+			{"countryCode": "no", "currency": "NOK", "locale": "nb-no"},
+			{"countryCode": "dk", "currency": "DKK", "locale": "da-dk"}
+		]
+	}`
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatalf("write test file: %v", err)
+	}
+
+	cfg, err := LoadConfig(path)
+	if err != nil {
+		t.Fatalf("LoadConfig failed: %v", err)
+	}
+	if len(cfg.Regions) != 3 {
+		t.Fatalf("expected 3 regions, got %d", len(cfg.Regions))
+	}
+
+	if got := cfg.CurrencyOf("dk"); got != "DKK" {
+		t.Errorf("CurrencyOf(dk) = %s, want DKK", got)
+	}
+	if got := cfg.LocaleOf("dk"); got != "da-dk" {
+		t.Errorf("LocaleOf(dk) = %s, want da-dk", got)
+	}
+	if got := cfg.CountryFromCurrency("DKK"); got != "dk" {
+		t.Errorf("CountryFromCurrency(DKK) = %s, want dk", got)
+	}
+}
+
+func TestLoadConfig_NormalisesCountryCode(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "regions.json")
+	content := `{"regions": [{"countryCode": "NO", "currency": "NOK", "locale": "nb-no"}]}`
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatalf("write test file: %v", err)
+	}
+
+	cfg, err := LoadConfig(path)
+	if err != nil {
+		t.Fatalf("LoadConfig failed: %v", err)
+	}
+	if got := cfg.CurrencyOf("NO"); got != "NOK" {
+		t.Errorf("CurrencyOf(NO) = %s, want NOK", got)
+	}
+	if got := cfg.CurrencyOf("no"); got != "NOK" {
+		t.Errorf("CurrencyOf(no) = %s, want NOK", got)
+	}
+}