tsk-34: Fetch next ready scheduled message (#38)

Closes #34

Reviewed-on: phoenix/textsender-api#38
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/handler/scheduled_message_test.go

@@ -78,6 +78,57 @@ func TestGetScheduledMessageWithMock(t *testing.T) {
 	assert.NoError(t, err, "Error parsing response %v", err)
 }
 
+func TestFetchScheduledMessageWithMock(t *testing.T) {
+	now := time.Now()
+	mockStore := mock.NewMockScheduledMessageStore()
+	contactStore := mock.NewMockContactStore()
+	messageStore := mock.NewMockMessageStore()
+	schMsgEventStore := mock.NewMockScheduledMessageEventStore()
+
+	recipientId := uuid.New()
+	messageId := uuid.New()
+	scheduledMessageId := uuid.New()
+	testUserId := uuid.New()
+
+	con := testContact(recipientId, testUserId)
+	msg := testMessage(messageId, testUserId)
+	schMsg := testScheduledMessage(scheduledMessageId, testUserId, now)
+	event := testScheduledMessageEvent(msg.Id, con.Id, schMsg.Id)
+
+	ctx := t.Context()
+
+	if err := contactStore.CreateContact(ctx, &con); err != nil {
+		assert.NoError(t, err, "Error creating contact: %v", err)
+	} else if err = messageStore.CreateMessage(ctx, &msg); err != nil {
+		assert.NoError(t, err, "Error creating message: %v", err)
+	} else if err = mockStore.CreateScheduledMessage(ctx, &schMsg); err != nil {
+		assert.NoError(t, err, "Error creating scheduled message: %v", err)
+	} else if err = schMsgEventStore.CreateScheduledMessageEvent(ctx, &event); err != nil {
+		assert.NoError(t, err, "Error creating scheduled message event: %v", err)
+	} else if newStatus, err := mockStore.UpdateStatus(ctx, schMsg.Id, scheduling.Ready); err != nil {
+		assert.NoError(t, err, "Error updating status: %v", err)
+	} else {
+		assert.Equal(t, *newStatus, scheduling.Ready)
+	}
+
+	req, _ := http.NewRequest("GET", endpoint.FetchNextScheduledMessageEndpoint, nil)
+	rr := httptest.NewRecorder()
+
+	handler := NewScheduledMessageHandler(mockStore)
+	handler.FetchNextMessage(rr, req)
+
+	assert.Equal(t, http.StatusOK, rr.Code)
+
+	var response FetchNextMessageResponse
+	err := json.Unmarshal(rr.Body.Bytes(), &response)
+	assert.NoError(t, err, "Error fetching scheduled message: %v", err)
+
+	assert.NotEmpty(t, response.Data, "No data")
+
+	fetchedSchMsg := response.Data[0]
+	assert.Equal(t, scheduling.Processing, fetchedSchMsg.Status, "The statuses do not match")
+}
+
 func testCreateScheduledMessageRequest(userId uuid.UUID, now time.Time) CreateScheduledMessageRequest {
 	scheduled := now.Add(5 * time.Minute)
 	return CreateScheduledMessageRequest{Status: scheduling.Pending, UserId: userId, Scheduled: scheduled}