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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,26 @@ class BankAccount attr_reader :balance @@minimum_balance = 200 def initialize(opening_balance, account_holder) raise ArgumentError if opening_balance < @@minimum_balance @balance = opening_balance end def deposit amount @balance += amount end def withdraw amount @balance -= amount end def transfer amount, account withdraw amount account.deposit amount end def self.minimum_balance= amount @@minimum_balance = amount end end This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,79 @@ require './bank_account.rb' describe BankAccount do context "has a balance" do let(:account) do account = BankAccount.new(500, "Sarah") end it "is created with an opening balance and the name of the client" do expect(account).to be_a(BankAccount) end it "can report it's balance" do expect(account.balance).to eq(500) end end context "making a deposit" do let(:account) do account = BankAccount.new(500, "Sarah") account.deposit(500) account end it "balance is increased" do expect(account.balance).to eq(1000) end end context "making a withdrawal" do let(:account) do account = BankAccount.new(500, "Sarah") account.withdraw(200) account end it "balance is decreased" do expect(account.balance).to eq(300) end end context "transfering funds" do let(:account) do account = BankAccount.new(500, "Sarah") end let(:other_account) do other_account = BankAccount.new(1000, "Todd") end before :each do account.transfer(200, other_account) end it "account balance is decreased" do expect(account.balance).to eq(300) end it "other account balance is increased" do expect(other_account.balance).to eq(1200) end end context "minimum balance" do it "raises an error if opening balance is too low" do expect{ BankAccount.new(199, "Terry") }.to raise_error(ArgumentError) end it "does NOT raise an error if opening balance is over minimum balance" do expect{ BankAccount.new(201, "Terry") }.not_to raise_error end it "allows the bank owner to change the minimum balance" do BankAccount.minimum_balance = 100 expect(BankAccount.minimum_balance).to eq(100) end end end