feat: message parser with json/regex/text modes

internal/parser/parser_test.go

@@ -0,0 +1,62 @@
+package parser
+
+import (
+	"testing"
+)
+
+func TestJSONParser(t *testing.T) {
+	p := &JSONParser{}
+	body := []byte(`{"event":"trade.open","data":{"symbol":"BTC","price":65000}}`)
+	msg, err := p.Parse(body)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if msg.Event != "trade.open" {
+		t.Errorf("expected event 'trade.open', got '%s'", msg.Event)
+	}
+	if msg.Data["symbol"] != "BTC" {
+		t.Errorf("expected symbol 'BTC', got '%v'", msg.Data["symbol"])
+	}
+}
+
+func TestJSONParser_NoDataKey(t *testing.T) {
+	p := &JSONParser{}
+	body := []byte(`{"event":"alert","symbol":"ETH"}`)
+	msg, err := p.Parse(body)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if msg.Data["symbol"] != "ETH" {
+		t.Errorf("expected symbol 'ETH' in data, got '%v'", msg.Data["symbol"])
+	}
+}
+
+func TestRegexParser(t *testing.T) {
+	p, err := NewRegexParser(`(?P<event>[\w.]+) (?P<message>.+)`)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	body := []byte("trade.open BTC long at 65000")
+	msg, err := p.Parse(body)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if msg.Event != "trade.open" {
+		t.Errorf("expected event 'trade.open', got '%s'", msg.Event)
+	}
+	if msg.Data["message"] != "BTC long at 65000" {
+		t.Errorf("expected message, got '%v'", msg.Data["message"])
+	}
+}
+
+func TestTextParser(t *testing.T) {
+	p := &TextParser{}
+	body := []byte("raw notification text here")
+	msg, err := p.Parse(body)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if msg.Data["Body"] != "raw notification text here" {
+		t.Errorf("expected Body in data, got '%v'", msg.Data["Body"])
+	}
+}