Fixed missing STDOUT in Echo test

Fixed missing opening and closing brackets in {{start}}

Author: PrzemekWirkus

libraries/tests/mbed/echo/main.cpp

@@ -22,11 +22,13 @@ int main() {
 
     Serial pc(TXPIN, RXPIN);
     pc.baud(115200);
+
+    pc.puts("{{");
     pc.puts(TEST_ENV_START);    // Host test is expecting preamble
+    pc.puts("}}");
 
     while (1) {
         pc.gets(buf, 256);
-
         pc.printf("%s", buf);
     }
 }

workspace_tools/host_tests/echo.py

@@ -15,6 +15,7 @@
 limitations under the License.
 """
 import uuid
+from sys import stdout
 from host_test import Test
 
 
@@ -28,12 +29,18 @@ def test(self):
         # Let's wait for Mbed to print its readiness, usually "{{start}}"
         if self.mbed.serial_timeout(None) is None:
             self.print_result("ioerr_serial")
-            return        
+            return
 
         c = self.mbed.serial_read(len('{{start}}'))
         if c is None:
             self.print_result("ioerr_serial")
             return
+        print c
+        stdout.flush()
+
+        if self.mbed.serial_timeout(1) is None:
+            self.print_result("ioerr_serial")
+            return
 
         self.mbed.flush()
         self.notify("Starting the ECHO test")

workspace_tools/host_tests/stdio_auto.py

@@ -37,6 +37,12 @@ def run(self):
         if c is None:
             self.print_result("ioerr_serial")
             return
+        print c
+        stdout.flush()
+
+        if self.mbed.serial_timeout(1) is None:
+            self.print_result("ioerr_serial")
+            return
 
         for i in range(1, 5):
             random_integer = random.randint(-99999, 99999)
@@ -64,7 +70,7 @@ def run(self):
                     stdout.flush()
                     break
             else:
-                print "Error: No IP and port information sent from server"
+                print "Error: No data from MUT sent"
                 self.print_result('error')
                 exit(-2)