Add client core, handshake pending frames, and in-memory Conn tests

conn_test.go

@@ -0,0 +1,37 @@
+package ownwire_sdk_test
+
+import "context"
+
+// sdk_test_inmem_conn is a test-only in-memory Conn implementation.
+// It lets tests drive protocol logic deterministically without a real websocket
+// or a server.
+type sdk_test_inmem_conn struct {
+	write_ch chan string
+	read_ch  chan string
+}
+
+func sdk_test_new_inmem_conn() *sdk_test_inmem_conn {
+	return &sdk_test_inmem_conn{
+		write_ch: make(chan string, 16),
+		read_ch:  make(chan string, 16),
+	}
+}
+
+func (c *sdk_test_inmem_conn) WriteText(ctx context.Context, s string) error {
+	select {
+	case c.write_ch <- s:
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}
+
+func (c *sdk_test_inmem_conn) ReadText(ctx context.Context) (string, error) {
+	select {
+	case s := <-c.read_ch:
+		return s, nil
+	case <-ctx.Done():
+		return "", ctx.Err()
+	}
+}
+