test: Added Event.String()

Part of #1

event_test.go

@@ -0,0 +1,30 @@
+package sse_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/christopher-kleine/sse"
+)
+
+func TestEventString(t *testing.T) {
+	testTable := []struct {
+		input    *sse.Event
+		expected string
+	}{
+		{input: &sse.Event{Data: "test"}, expected: "data: test\n\n"},
+		{input: &sse.Event{Retry: 1 * time.Second}, expected: "retry: 1000\n\n"},
+		{input: &sse.Event{ID: "1"}, expected: "id: 1\n\n"},
+		{input: &sse.Event{Event: "foo"}, expected: "event: foo\n\n"},
+		{input: &sse.Event{Retry: 1 * time.Second, Data: "Dummy"}, expected: "data: Dummy\nretry: 1000\n\n"},
+		{input: &sse.Event{Data: "foo\nbar"}, expected: "data: foo\ndata: bar\n\n"},
+		{input: &sse.Event{Data: "foo\nbar\n"}, expected: "data: foo\ndata: bar\n\n"},
+	}
+
+	for _, testCase := range testTable {
+		actual := testCase.input.String()
+		if actual != testCase.expected {
+			t.Errorf("%q should be %q", actual, testCase.expected)
+		}
+	}
+}