going full courtside

backend-go/internal/notifications/email_test.go

@@ -0,0 +1,102 @@
+package notifications
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestSMTPConfig_IsConfigured(t *testing.T) {
+	tests := []struct {
+		name string
+		cfg  SMTPConfig
+		want bool
+	}{
+		{"fully configured", SMTPConfig{Host: "smtp.example.com", Port: 587, From: "noreply@example.com"}, true},
+		{"missing host", SMTPConfig{Port: 587, From: "noreply@example.com"}, false},
+		{"missing from", SMTPConfig{Host: "smtp.example.com", Port: 587}, false},
+		{"empty", SMTPConfig{}, false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.cfg.IsConfigured(); got != tt.want {
+				t.Errorf("IsConfigured() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestSMTPConfig_Addr(t *testing.T) {
+	cfg := SMTPConfig{Host: "smtp.example.com", Port: 587}
+	if got := cfg.addr(); got != "smtp.example.com:587" {
+		t.Errorf("addr() = %q, want %q", got, "smtp.example.com:587")
+	}
+}
+
+func TestBuildEmailBody(t *testing.T) {
+	meta := AlertMetadata{
+		TxHash:       "0xabc123",
+		AddressLabel: "Treasury",
+		AlertType:    "incoming_tx",
+		Address:      "0x1234567890abcdef1234567890abcdef12345678",
+	}
+
+	body := buildEmailBody("Incoming transaction: 5.5 ETH received", meta)
+
+	if !strings.Contains(body, "Koin Ping Alert") {
+		t.Error("body should contain title")
+	}
+	if !strings.Contains(body, "Incoming transaction: 5.5 ETH received") {
+		t.Error("body should contain message")
+	}
+	if !strings.Contains(body, "Treasury") {
+		t.Error("body should contain address label")
+	}
+	if !strings.Contains(body, "0x1234567890abcdef") {
+		t.Error("body should contain blockchain address")
+	}
+	if !strings.Contains(body, "etherscan.io/tx/0xabc123") {
+		t.Error("body should contain etherscan link")
+	}
+}
+
+func TestBuildEmailBody_NoTxHash(t *testing.T) {
+	meta := AlertMetadata{
+		AddressLabel: "Cold Storage",
+		AlertType:    "balance_below",
+		Address:      "0xabcdef",
+	}
+
+	body := buildEmailBody("Balance dropped below threshold", meta)
+
+	if strings.Contains(body, "etherscan.io") {
+		t.Error("body should not contain etherscan link when no tx hash")
+	}
+}
+
+func TestHumanAlertType(t *testing.T) {
+	tests := map[string]string{
+		"incoming_tx":    "Incoming Transaction",
+		"outgoing_tx":    "Outgoing Transaction",
+		"large_transfer": "Large Transfer",
+		"balance_below":  "Balance Below Threshold",
+		"unknown":        "Alert",
+		"test":           "Alert",
+	}
+	for alertType, want := range tests {
+		if got := humanAlertType(alertType); got != want {
+			t.Errorf("humanAlertType(%q) = %q, want %q", alertType, got, want)
+		}
+	}
+}
+
+func TestSendEmailNotification_NotConfigured(t *testing.T) {
+	cfg := SMTPConfig{}
+	sent, err := SendEmailNotification(cfg, "user@example.com", "test", AlertMetadata{})
+	if err == nil {
+		t.Fatal("expected error for unconfigured SMTP")
+	}
+	if sent {
+		t.Fatal("expected sent to be false")
+	}
+}