micropython: add micropython component

components/language/micropython/tests/esp32/esp32_nvs.py

@@ -0,0 +1,67 @@
+# Test the esp32 NVS class - access to esp-idf's Non-Volatile-Storage
+
+from esp32 import NVS
+
+nvs = NVS("mp-test")
+
+# test setting and gettin an integer kv
+nvs.set_i32("key1", 1234)
+print(nvs.get_i32("key1"))
+nvs.set_i32("key2", -503)
+print(nvs.get_i32("key2"))
+print(nvs.get_i32("key1"))
+
+# test setting and getting a blob kv using a bytearray
+blob1 = "testing a string as a blob"
+nvs.set_blob("blob1", blob1)
+buf1 = bytearray(len(blob1))
+len1 = nvs.get_blob("blob1", buf1)
+print(buf1)
+print(len(blob1), len1)
+
+# test setting and getting a blob kv using a string
+blob2 = b"testing a bytearray"
+nvs.set_blob("blob2", blob2)
+buf2 = bytearray(len(blob2))
+len2 = nvs.get_blob("blob2", buf2)
+print(buf2)
+print(len(blob2), len2)
+
+# test raising of error exceptions
+nvs.erase_key("key1")
+try:
+    nvs.erase_key("key1")  # not found
+except OSError as e:
+    print(e)
+try:
+    nvs.get_i32("key1")  # not found
+except OSError as e:
+    print(e)
+try:
+    nvs.get_i32("blob1")  # not found (blob1 exists but diff type)
+except OSError as e:
+    print(e)
+try:
+    buf3 = bytearray(10)
+    nvs.get_blob("blob1", buf3)  # invalid length (too short)
+except OSError as e:
+    print(e)
+
+nvs.commit()  # we're not verifying that this does anything, just doesn't error
+
+# test using a second namespace and that it doesn't interfere with first
+nvs2 = NVS("mp-test2")
+try:
+    print(nvs2.get_i32("key2"))
+except OSError as e:
+    print(e)
+nvs2.set_i32("key2", 7654)
+print(nvs.get_i32("key2"))
+print(nvs2.get_i32("key2"))
+
+# clean-up (the namespaces will remain)
+nvs.erase_key("key2")
+nvs.erase_key("blob1")
+nvs.erase_key("blob2")
+nvs2.erase_key("key2")
+nvs.commit()