Implement functional Wifi tests

Implement 100% function coverage for WifiInterface as specified
in "Wifi test plan"

TESTS/network/wifi/get_interface.cpp

@@ -0,0 +1,21 @@
+#include "mbed.h"
+#include "ESP8266Interface.h"
+
+WiFiInterface *get_interface()
+{
+    static WiFiInterface *interface = NULL;
+
+    if (interface)
+        delete interface;
+
+#if TARGET_UBLOX_EVK_ODIN_W2
+#include "OdinWiFiInterface.h"
+    interface = new OdinWiFiInterface();
+#elif TARGET_REALTEK_RTL8195AM
+#include "RTWInterface.h"
+    interface = new RTWInterface();
+#else
+    interface = new ESP8266Interface(D1, D0);
+#endif
+    return interface;
+}

TESTS/network/wifi/main.cpp

@@ -1,196 +1,39 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2016 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "utest/utest.h"
-#include "unity/unity.h"
-#include "greentea-client/test_env.h"
-
 #include "mbed.h"
-
+#include "greentea-client/test_env.h"
-#if TARGET_UBLOX_EVK_ODIN_W2
+#include "unity.h"
-#include "OdinWiFiInterface.h"
+#include "utest.h"
-#else
+#include "wifi_tests.h"
-#error [NOT_SUPPORTED] Only built in WiFi modules are supported at this time.
-#endif
 
 using namespace utest::v1;
 
-/**
+utest::v1::status_t test_setup(const size_t number_of_cases) {
- * WiFi tests require following macros to be defined:
+    GREENTEA_SETUP(120, "default_auto");
- * - MBED_CONF_APP_WIFI_SSID - SSID of a network the test will try connecting to
+    return verbose_test_setup_handler(number_of_cases);
- * - MBED_CONF_APP_WIFI_PASSWORD - Passphrase that will be used to connecting to the network
- * - WIFI_TEST_NETWORKS - List of network that presence will be asserted e.g. "net1", "net2", "net3"
- */
-#if !defined(MBED_CONF_APP_WIFI_SSID) || !defined(MBED_CONF_APP_WIFI_PASSWORD) || !defined(MBED_CONF_APP_WIFI_NETWORKS)
-#error [NOT_SUPPORTED] MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD and MBED_CONF_APP_WIFI_NETWORKS have to be defined for this test.
-#endif
-
-const char *networks[] = {MBED_CONF_APP_WIFI_NETWORKS, NULL};
-
-WiFiInterface *wifi;
-
-/* In normal circumstances the WiFi object could be global, but the delay introduced by WiFi initialization is an issue
-   for the tests. It causes Greentea to timeout on syncing with the board. To solve it we defer the actual object
-   creation till we actually need it.
- */
-WiFiInterface *get_wifi()
-{
-    if (wifi == NULL) {
-        /* We don't really care about freeing this, as its lifetime is through the full test suit run. */
-#if TARGET_UBLOX_EVK_ODIN_W2
-        wifi = new OdinWiFiInterface;
-#endif
-    }
-
-    return wifi;
-}
-
-void check_wifi(const char *ssid, bool *net_stat)
-{
-    int i = 0;
-    while(networks[i]) {
-        if (strcmp(networks[i], ssid) == 0) {
-            net_stat[i] = true;
-            break;
-        }
-        i++;
-    }
-}
-
-void wifi_scan()
-{
-    int count;
-    WiFiAccessPoint *aps;
-    const int net_len = sizeof(networks)/sizeof(networks[0]);
-    bool net_stat[net_len - 1];
-
-    memset(net_stat, 0, sizeof(net_stat));
-
-    count = get_wifi()->scan(NULL, 0);
-    TEST_ASSERT_MESSAGE(count >= 0, "WiFi interface returned error");
-    TEST_ASSERT_MESSAGE(count > 0, "Scan result empty");
-
-    aps = new WiFiAccessPoint[count];
-    count = get_wifi()->scan(aps, count);
-    for(int i = 0; i < count; i++) {
-        check_wifi(aps[i].get_ssid(), net_stat);
-    }
-
-    delete[] aps;
-
-    for (unsigned i = 0; i < sizeof(net_stat); i++) {
-        TEST_ASSERT_MESSAGE(net_stat[i] == true, "Not all required WiFi network detected");
-    }
-}
-
-void wifi_connect()
-{
-    int ret;
-
-    ret = get_wifi()->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
-    TEST_ASSERT_MESSAGE(ret == 0, "Connect failed");
-
-    ret = get_wifi()->disconnect();
-    TEST_ASSERT_MESSAGE(ret == 0, "Disconnect failed");
-}
-
-void wifi_connect_scan()
-{
-    int ret;
-    int count;
-    WiFiAccessPoint *aps;
-    const int net_len = sizeof(networks)/sizeof(networks[0]);
-    bool net_stat[net_len - 1];
-
-    memset(net_stat, 0, sizeof(net_stat));
-
-    ret = get_wifi()->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
-    TEST_ASSERT_MESSAGE(ret == 0, "Connect failed");
-
-    count = get_wifi()->scan(NULL, 0);
-    TEST_ASSERT_MESSAGE(count >= 0, "WiFi interface returned error");
-    TEST_ASSERT_MESSAGE(count > 0, "Scan result empty");
-
-    aps = new WiFiAccessPoint[count];
-    count = get_wifi()->scan(aps, count);
-    for(int i = 0; i < count; i++) {
-        check_wifi(aps[i].get_ssid(), net_stat);
-    }
-
-    delete[] aps;
-
-    ret = get_wifi()->disconnect();
-    TEST_ASSERT_MESSAGE(ret == 0, "Disconnect failed");
-
-    for (unsigned i = 0; i < sizeof(net_stat); i++) {
-        TEST_ASSERT_MESSAGE(net_stat[i] == true, "Not all required WiFi network detected");
-    }
-}
-
-void wifi_http()
-{
-    TCPSocket socket;
-    int ret;
-
-    ret = get_wifi()->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
-    TEST_ASSERT_MESSAGE(ret == 0, "Connect failed");
-
-    // Open a socket on the network interface, and create a TCP connection to www.arm.com
-    ret = socket.open(get_wifi());
-    TEST_ASSERT_MESSAGE(ret == 0, "Socket open failed");
-    ret = socket.connect("www.arm.com", 80);
-    TEST_ASSERT_MESSAGE(ret == 0, "Socket connect failed");
-
-    // Send a simple http request
-    char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
-    int scount = socket.send(sbuffer, sizeof sbuffer);
-    TEST_ASSERT_MESSAGE(scount >= 0, "Socket send failed");
-
-    // Recieve a simple http response and check if it's not empty
-    char rbuffer[64];
-    int rcount = socket.recv(rbuffer, sizeof rbuffer);
-    TEST_ASSERT_MESSAGE(rcount >= 0, "Socket recv error");
-    TEST_ASSERT_MESSAGE(rcount > 0, "No data received");
-
-    ret = socket.close();
-    TEST_ASSERT_MESSAGE(ret == 0, "Socket close failed");
-
-    ret = get_wifi()->disconnect();
-    TEST_ASSERT_MESSAGE(ret == 0, "Disconnect failed");
-}
-
-status_t greentea_failure_handler(const Case *const source, const failure_t reason) {
-    greentea_case_failure_abort_handler(source, reason);
-    return STATUS_CONTINUE;
 }
 
+// Test cases
 Case cases[] = {
-    Case("Scan test", wifi_scan, greentea_failure_handler),
+    Case("WIFI-CONSTRUCTOR", wifi_constructor),
-    Case("Connect test", wifi_connect, greentea_failure_handler),
+    Case("WIFI-SET-CREDENTIAL", wifi_set_credential),
-    Case("Scan while connected test", wifi_connect_scan, greentea_failure_handler),
+    Case("WIFI-SET-CHANNEL", wifi_set_channel),
-    Case("HTTP test", wifi_http, greentea_failure_handler),
+    Case("WIFI-GET-RSSI", wifi_get_rssi),
+    Case("WIFI-CONNECT-PARAMS-NULL", wifi_connect_params_null),
+    Case("WIFI-CONNECT-PARAMS-VALID-UNSECURE", wifi_connect_params_valid_unsecure),
+    Case("WIFI-CONNECT-PARAMS-VALID-SECURE", wifi_connect_params_valid_secure),
+    Case("WIFI-CONNECT-PARAMS-CHANNEL", wifi_connect_params_channel),
+    Case("WIFI-CONNECT-PARAMS-CHANNEL-FAIL", wifi_connect_params_channel_fail),
+    Case("WIFI-CONNECT-NOCREDENTIALS", wifi_connect_nocredentials),
+    Case("WIFI-CONNECT", wifi_connect),
+    Case("WIFI-CONNECT-SECURE", wifi_connect_secure),
+    Case("WIFI-CONNECT-SECURE-FAIL", wifi_connect_secure_fail),
+    Case("WIFI-CONNECT-DISCONNECT-REPEAT", wifi_connect_disconnect_repeat),
+    Case("WIFI-SCAN-NULL", wifi_scan_null),
+    Case("WIFI-SCAN", wifi_scan),
 };
 
-status_t greentea_test_setup(const size_t number_of_cases) {
+Specification specification(test_setup, cases);
-    GREENTEA_SETUP(90, "default_auto");
-    return greentea_test_setup_handler(number_of_cases);
-}
-
 
+// Entry point into the tests
 int main() {
-    Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
+    return !Harness::run(specification);
-    Harness::run(specification);
 }

TESTS/network/wifi/wifi-constructor.cpp

@@ -0,0 +1,12 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_constructor() {
+    WiFiInterface *wifi = get_interface();
+    TEST_ASSERT(wifi);
+}

TESTS/network/wifi/wifi_connect.cpp

@@ -0,0 +1,16 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_UNSECURE_SSID, NULL));
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect());
+}

TESTS/network/wifi/wifi_connect_disconnect_repeat.cpp

@@ -0,0 +1,23 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_disconnect_repeat(void)
+{
+    WiFiInterface *wifi = get_interface();
+    nsapi_error_t error;
+
+    error = wifi->set_credentials(MBED_CONF_APP_WIFI_UNSECURE_SSID, NULL);
+    TEST_ASSERT(error == NSAPI_ERROR_OK);
+
+    for(int i=0; i<10; i++) {
+        error = wifi->connect();
+        TEST_ASSERT(error == NSAPI_ERROR_OK);
+        error = wifi->disconnect();
+        TEST_ASSERT(error == NSAPI_ERROR_OK);
+    }
+}

TESTS/network/wifi/wifi_connect_nocredentials.cpp

@@ -0,0 +1,16 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_nocredentials(void)
+{
+    WiFiInterface *wifi = get_interface();
+    nsapi_error_t error;
+    error = wifi->connect();
+    wifi->disconnect();
+    TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+}

TESTS/network/wifi/wifi_connect_params_channel.cpp

@@ -0,0 +1,21 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_params_channel(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    if (wifi->set_channel(1) == NSAPI_ERROR_UNSUPPORTED && wifi->set_channel(36) == NSAPI_ERROR_UNSUPPORTED) {
+        TEST_IGNORE_MESSAGE("set_channel() not supported");
+        return;
+    }
+
+    nsapi_error_t error = wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA2, MBED_CONF_APP_WIFI_CH_SECURE);
+    TEST_ASSERT_EQUAL(NSAPI_ERROR_OK, error);
+}
+

TESTS/network/wifi/wifi_connect_params_channel_fail.cpp

@@ -0,0 +1,21 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_params_channel_fail(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    if (wifi->set_channel(1) == NSAPI_ERROR_UNSUPPORTED && wifi->set_channel(36) == NSAPI_ERROR_UNSUPPORTED) {
+        TEST_IGNORE_MESSAGE("set_channel() not supported");
+        return;
+    }
+
+    nsapi_error_t error = wifi->connect(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA2, MBED_CONF_APP_WIFI_CH_UNSECURE);
+    TEST_ASSERT(error==NSAPI_ERROR_CONNECTION_TIMEOUT || error==NSAPI_ERROR_NO_CONNECTION);
+}
+

TESTS/network/wifi/wifi_connect_params_null.cpp

@@ -0,0 +1,13 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_params_null(void)
+{
+    WiFiInterface *wifi = get_interface();
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_PARAMETER, wifi->connect(NULL, NULL));
+}

TESTS/network/wifi/wifi_connect_params_valid_secure.cpp

@@ -0,0 +1,13 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+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));
+}

TESTS/network/wifi/wifi_connect_params_valid_unsecure.cpp

@@ -0,0 +1,14 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_params_valid_unsecure(void)
+{
+    WiFiInterface *wifi = get_interface();
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect(MBED_CONF_APP_WIFI_UNSECURE_SSID, NULL));
+}
+

TESTS/network/wifi/wifi_connect_secure.cpp

@@ -0,0 +1,17 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_secure(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_SECURE_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA2));
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect());
+}
+

TESTS/network/wifi/wifi_connect_secure_fail.cpp

@@ -0,0 +1,17 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_connect_secure_fail(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_SECURE_SSID, "aaaaaaaa", NSAPI_SECURITY_WPA2));
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_AUTH_FAILURE, wifi->connect());
+}
+

TESTS/network/wifi/wifi_get_rssi.cpp

@@ -0,0 +1,21 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_get_rssi(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_UNSECURE_SSID, NULL));
+
+    TEST_ASSERT_EQUAL_INT8(0, wifi->get_rssi());
+
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect());
+
+    TEST_ASSERT_INT8_WITHIN(-35, -65, wifi->get_rssi()); // -30 ... -100
+}
+

TESTS/network/wifi/wifi_scan.cpp

@@ -0,0 +1,50 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+#include <stdbool.h>
+
+using namespace utest::v1;
+
+void wifi_scan(void)
+{
+    WiFiInterface *wifi = get_interface();
+
+    WiFiAccessPoint ap[MBED_CONF_APP_MAX_SCAN_SIZE];
+
+    int size = wifi->scan(ap, MBED_CONF_APP_MAX_SCAN_SIZE);
+    TEST_ASSERT(size >= 2);
+
+    bool secure_found = false;
+    bool unsecure_found = false;
+
+    char secure_bssid[6];
+    char unsecure_bssid[6];
+    const char *coversion_string = "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx";
+    TEST_ASSERT_EQUAL_INT_MESSAGE(6, sscanf(MBED_CONF_APP_AP_MAC_SECURE, coversion_string, &secure_bssid[0], &secure_bssid[1], &secure_bssid[2], &secure_bssid[3], &secure_bssid[4], &secure_bssid[5]), "Failed to convert ap-mac-secure from mbed_app.json");
+    TEST_ASSERT_EQUAL_INT_MESSAGE(6, sscanf(MBED_CONF_APP_AP_MAC_UNSECURE, coversion_string, &unsecure_bssid[0], &unsecure_bssid[1], &unsecure_bssid[2], &unsecure_bssid[3], &unsecure_bssid[4], &unsecure_bssid[5]), "Failed to convert ap-mac-unsecure from mbed_app.json");
+
+    for (int i=0; i<size; i++) {
+        const char *ssid = ap[i].get_ssid();
+        const uint8_t *bssid = ap[i].get_bssid();
+        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);
+        if (strcmp(MBED_CONF_APP_WIFI_SECURE_SSID, ssid) == 0) {
+            secure_found = true;
+            TEST_ASSERT_EQUAL_INT(NSAPI_SECURITY_WPA2, security);
+            TEST_ASSERT_EQUAL_INT(MBED_CONF_APP_WIFI_CH_SECURE, ch);
+        }
+        if (strcmp(MBED_CONF_APP_WIFI_UNSECURE_SSID, ssid) == 0) {
+            unsecure_found = true;
+            TEST_ASSERT_EQUAL_INT(NSAPI_SECURITY_NONE, security);
+            TEST_ASSERT_EQUAL_INT(MBED_CONF_APP_WIFI_CH_UNSECURE, ch);
+        }
+    }
+    TEST_ASSERT_TRUE(secure_found);
+    TEST_ASSERT_TRUE(unsecure_found);
+}
+

TESTS/network/wifi/wifi_scan_null.cpp

@@ -0,0 +1,14 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_scan_null(void)
+{
+    WiFiInterface *wifi = get_interface();
+    TEST_ASSERT(wifi->scan(NULL, 0) >= 2);
+}
+

TESTS/network/wifi/wifi_set_channel.cpp

@@ -0,0 +1,56 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+#include <stdbool.h>
+
+using namespace utest::v1;
+
+void wifi_set_channel(void)
+{
+    bool is_2Ghz = false;
+    bool is_5Ghz = false;
+
+    WiFiInterface *wifi = get_interface();
+
+    if (wifi->set_channel(1) == NSAPI_ERROR_UNSUPPORTED && wifi->set_channel(36) == NSAPI_ERROR_UNSUPPORTED) {
+        TEST_IGNORE_MESSAGE("set_channel() not supported");
+        return;
+    }
+
+    nsapi_error_t error;
+    error = wifi->set_channel(1);
+    if (error == NSAPI_ERROR_OK) {
+        is_2Ghz = true;
+    }
+
+    error = wifi->set_channel(30);
+    if (error == NSAPI_ERROR_OK) {
+        is_5Ghz = true;
+    }
+
+    TEST_ASSERT(is_2Ghz || is_5Ghz);
+
+    if (is_2Ghz) {
+        error = wifi->set_channel(0);
+        TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+        error = wifi->set_channel(1);
+        TEST_ASSERT(error == NSAPI_ERROR_OK);
+        error = wifi->set_channel(13);
+        TEST_ASSERT(error == NSAPI_ERROR_OK || error == NSAPI_ERROR_PARAMETER);
+        error = wifi->set_channel(15);
+        TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+    }
+
+    if (is_5Ghz) {
+        error = wifi->set_channel(30);
+        TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+        error = wifi->set_channel(36);
+        TEST_ASSERT(error == NSAPI_ERROR_OK);
+        error = wifi->set_channel(169);
+        TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+    }
+
+}
+

TESTS/network/wifi/wifi_set_credential.cpp

@@ -0,0 +1,37 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "wifi_tests.h"
+
+using namespace utest::v1;
+
+void wifi_set_credential(void)
+{
+    WiFiInterface *iface = get_interface();
+    nsapi_error_t error;
+
+    error = iface->set_credentials(NULL, NULL, NSAPI_SECURITY_NONE);
+    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", NULL, NSAPI_SECURITY_WEP);
+    TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+
+    error = iface->set_credentials("OK", NULL, NSAPI_SECURITY_WPA_WPA2);
+    TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+
+    error = iface->set_credentials("OK", "12345678", NSAPI_SECURITY_WPA);
+    TEST_ASSERT(error == NSAPI_ERROR_OK);
+
+    error = iface->set_credentials("OK", "12345678", NSAPI_SECURITY_WPA2);
+    TEST_ASSERT(error == NSAPI_ERROR_OK);
+
+    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);
+    TEST_ASSERT(error == NSAPI_ERROR_PARAMETER);
+}

TESTS/network/wifi/wifi_tests.h

@@ -0,0 +1,26 @@
+#ifndef WIFI_TESTS_H
+#define WIFI_TESTS_H
+
+#include "WiFiInterface.h"
+
+WiFiInterface *get_interface(void);
+
+/* Test cases */
+void wifi_constructor(void);
+void wifi_set_credential(void);
+void wifi_set_channel(void);
+void wifi_get_rssi(void);
+void wifi_connect_params_null(void);
+void wifi_connect_params_valid_unsecure(void);
+void wifi_connect_params_valid_secure(void);
+void wifi_connect_params_channel(void);
+void wifi_connect_params_channel_fail(void);
+void wifi_connect(void);
+void wifi_connect_nocredentials(void);
+void wifi_connect_secure(void);
+void wifi_connect_secure_fail(void);
+void wifi_connect_disconnect_repeat(void);
+void wifi_scan_null(void);
+void wifi_scan(void);
+
+#endif //WIFI_TESTS_H