Greentea Wifi testcase fixes

ONME-3266 Greentea testcase WIFI-SCAN fails arbitrarily
ONME-3278 Greentea testcase WIFI-SET-CREDENTIAL doesn't try WEP with valid credentials
ONME-3279 Greentea testcase WIFI-GET-RSSI uses arbitrary RSSI value limits
ONME-3280 Greentea testcase WIFI-CONNECT-PARAMS-VALID-SECURE assumes WPA2

Author: Veijo Pesonen

TESTS/network/wifi/wifi_connect_params_valid_secure.cpp

@@ -28,7 +28,24 @@ using namespace utest::v1;
 void wifi_connect_params_valid_secure(void)
 {
     WiFiInterface *wifi = get_interface();
-    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA2));
+
+    if(wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA2) == NSAPI_ERROR_OK) {
+        TEST_PASS();
+    }
+
+    if(wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2) == NSAPI_ERROR_OK) {
+        TEST_PASS();
+    }
+
+    if(wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA) == NSAPI_ERROR_OK) {
+        TEST_PASS();
+    }
+
+    if(wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WEP) == NSAPI_ERROR_OK) {
+        TEST_PASS();
+    }
+
+    TEST_FAIL();
 }
 
 #endif // defined(MBED_CONF_APP_WIFI_SECURE_SSID)

TESTS/network/wifi/wifi_get_rssi.cpp

@@ -35,7 +35,7 @@ void wifi_get_rssi(void)
 
     TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect());
 
-    TEST_ASSERT_INT8_WITHIN(-35, -65, wifi->get_rssi()); // -30 ... -100
+    TEST_ASSERT_INT8_WITHIN(-10, -100, wifi->get_rssi());
 }
 
 #endif // defined(MBED_CONF_APP_WIFI_UNSECURE_SSID)

TESTS/network/wifi/wifi_scan.cpp

@@ -50,8 +50,7 @@ void wifi_scan(void)
         nsapi_security_t security = ap[i].get_security();
         int8_t rssi = ap[i].get_rssi();
         uint8_t ch = ap[i].get_channel();
-        TEST_ASSERT_NOT_EQUAL(0, strlen(ssid));
-        TEST_ASSERT_INT8_WITHIN(-35, -65, rssi);
+        TEST_ASSERT_INT8_WITHIN(-10, -100, rssi);
         if (strcmp(MBED_CONF_APP_WIFI_SECURE_SSID, ssid) == 0) {
             secure_found = true;
             TEST_ASSERT_EQUAL_INT(NSAPI_SECURITY_WPA2, security);

TESTS/network/wifi/wifi_set_credential.cpp

@@ -40,6 +40,12 @@ void wifi_set_credential(void)
     error = iface->set_credentials("OK", NULL, NSAPI_SECURITY_WPA_WPA2);
     TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
 
+    error = iface->set_credentials("OK", NULL, NSAPI_SECURITY_NONE);
+    TEST_ASSERT(error == NSAPI_ERROR_OK);
+
+    error = iface->set_credentials("OK", "12345678", NSAPI_SECURITY_WEP);
+    TEST_ASSERT((error == NSAPI_ERROR_OK) || (error == NSAPI_ERROR_UNSUPPORTED));
+
     error = iface->set_credentials("OK", "12345678", NSAPI_SECURITY_WPA);
     TEST_ASSERT(error == NSAPI_ERROR_OK);
 
@@ -49,6 +55,9 @@ void wifi_set_credential(void)
     error = iface->set_credentials("OK", "12345678", NSAPI_SECURITY_WPA_WPA2);
     TEST_ASSERT(error == NSAPI_ERROR_OK);
 
-    error = iface->set_credentials("OK", "kUjd0PHHeAqaDoyfcDDEOvbyiVbYMpUHDukGoR6EJZnO5iLzWsfwiM9JQqOngni82", NSAPI_SECURITY_WPA2);
+    error = iface->set_credentials("OK", "kUjd0PHHeAqaDoyfcDDEOvbyiVbYMpUHDukGoR6EJZnO5iLzWsfwiM9JQqOngni", NSAPI_SECURITY_WPA2);
+    TEST_ASSERT(error == NSAPI_ERROR_OK);
+
+    error = iface->set_credentials("OK", "kUjd0PHHeAqaDoyfcDDEOvbyiVbYMpUHDukGoR6EJZnO5iLzWsfwiM9JQqOngni8", NSAPI_SECURITY_WPA2);
     TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
 }