Add ASN to logtail, collector, aggregator, frontend and CLI

cmd/frontend/filter_test.go

@@ -258,3 +258,77 @@ func TestFilterExprRoundTrip(t *testing.T) {
 		}
 	}
 }
+
+func TestParseAsnEQ(t *testing.T) {
+	fs, err := ParseFilterExpr("asn=12345")
+	if err != nil || fs.ASN != "12345" {
+		t.Fatalf("got err=%v fs=%+v", err, fs)
+	}
+}
+
+func TestParseAsnNE(t *testing.T) {
+	fs, err := ParseFilterExpr("asn!=65000")
+	if err != nil || fs.ASN != "!=65000" {
+		t.Fatalf("got err=%v fs=%+v", err, fs)
+	}
+}
+
+func TestParseAsnGE(t *testing.T) {
+	fs, err := ParseFilterExpr("asn>=1000")
+	if err != nil || fs.ASN != ">=1000" {
+		t.Fatalf("got err=%v fs=%+v", err, fs)
+	}
+}
+
+func TestParseAsnLT(t *testing.T) {
+	fs, err := ParseFilterExpr("asn<64512")
+	if err != nil || fs.ASN != "<64512" {
+		t.Fatalf("got err=%v fs=%+v", err, fs)
+	}
+}
+
+func TestParseAsnRegexRejected(t *testing.T) {
+	_, err := ParseFilterExpr("asn~=123")
+	if err == nil {
+		t.Fatal("expected error for asn~=")
+	}
+}
+
+func TestParseAsnInvalidExpr(t *testing.T) {
+	_, err := ParseFilterExpr("asn=notanumber")
+	if err == nil {
+		t.Fatal("expected error for non-numeric ASN")
+	}
+}
+
+func TestFilterExprStringASN(t *testing.T) {
+	s := FilterExprString(filterState{ASN: "12345"})
+	if s != "asn=12345" {
+		t.Fatalf("got %q", s)
+	}
+	s = FilterExprString(filterState{ASN: ">=1000"})
+	if s != "asn>=1000" {
+		t.Fatalf("got %q", s)
+	}
+}
+
+func TestFilterExprRoundTripASN(t *testing.T) {
+	cases := []filterState{
+		{ASN: "12345"},
+		{ASN: "!=65000"},
+		{ASN: ">=1000"},
+		{ASN: "<64512"},
+		{Status: ">=400", ASN: "12345"},
+	}
+	for _, fs := range cases {
+		expr := FilterExprString(fs)
+		fs2, err := ParseFilterExpr(expr)
+		if err != nil {
+			t.Errorf("round-trip parse error for %+v → %q: %v", fs, expr, err)
+			continue
+		}
+		if fs2 != fs {
+			t.Errorf("round-trip mismatch: %+v → %q → %+v", fs, expr, fs2)
+		}
+	}
+}