ruby - Best approach to testing methods run from initialize with rspec -


i have following code (chess implementation, i'm going through theodinproject.com path):

class move  def initialize(player, board)   @player     = player   @board      = board   @from       = ask_for_move_details("from")   @from_sq    = @board[@from.to_sym]   @from_piece = @from_sq[:piece]   @to         = ask_for_move_details("to")   @to_sq      = @board[@to.to_sym]   make_a_move if move_allowed?  end   def ask_for_move_details(from_or_to)    begin      msg_ask_for_move_details(@player, from_or_to)      chosen_address = gets.chomp.to_s      raise unless address_valid?(chosen_address)    rescue      msg_move_not_allowed      retry    end    chosen_address  end  ... end

i need test ask_for_move_details("from"/"to") methods run when object instance being created.

the goal e.g. make @from variable value of "a1" , @to variable "a6" value. far have came this:

allow(move).to receive(:gets).and_return("a1", "a6")

but doesn't work, @from gets nil value , test fails.

i know initialize method should not tested @ all, situation makes impossible create instance of object , therefore test methods. should refactor code?

ask_for_move_details("from"/"to") can stubbed using allow_any_instance_of with.

for example:

class   def a(b)   end end  describe   before     allow_any_instance_of(a).to receive(:a).with(1) { 2 }     allow_any_instance_of(a).to receive(:a).with(2) { 3 }   end        expect(a.new.a(1)).to eq 2     expect(a.new.a(2)).to eq 3   end end

so, value returned ask_for_move_details can stubbed depending on argument passed method:

allow_any_instance_of(move).to receive(:ask_for_move_details).with("from") { "a1" } allow_any_instance_of(move).to receive(:ask_for_move_details).with("to") { "a6" }

Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more