feat: added tests for all tasks

spec/spec_02.rb

@@ -0,0 +1,16 @@
+require_relative '../src/02_user_interface.rb'
+
+RSpec.describe "Main" do
+  before do
+    allow(STDIN).to receive(:gets).and_return("ruby\n")
+  end
+
+  it "greets the user and checks Ruby as language" do
+    expect { main() }.to output("Hello my catgirl test_user! \nWhat is your love language?\nruby\nc++\npy\nПодлиза \n").to_stdout
+  end
+
+  it "handles unknown language input" do
+    allow(STDIN).to receive(:gets).and_return("java\n")
+    expect { main() }.to output(/Неизвестный язык: java/).to_stdout
+  end
+end

spec/spec_03.rb

@@ -0,0 +1,34 @@
+require_relative '../src/03_fork_02_with_exec_pasted_command.rb'
+
+RSpec.describe "Main" do
+  before do
+    allow(STDIN).to receive(:gets).and_return("ruby\n", "puts 'Hello from Ruby!'\n", "echo 'Hello from shell!'\n")
+    allow(ARGV).to receive(:[]).with(0).and_return("test_user")
+  end
+
+  it "greets the user and processes ruby input" do
+    expect { main() }.to output(/Hello my catgirl test_user! \nWhat is your love language?\nruby\nc++\npy\nПодлиза \n/).to_stdout
+  end
+
+  it "executes valid ruby command" do
+    allow(STDIN).to receive(:gets).and_return("ruby\n", "puts 'Hello from Ruby!'\n")
+    
+    expect { main() }.to output(/Hello from Ruby!/).to_stdout
+  end
+
+  it "handles ruby command execution error" do
+    allow(STDIN).to receive(:gets).and_return("ruby\n", "invalid_ruby_code\n")
+    
+    expect { main() }.to output(/Ошибка выполнения команды Ruby: undefined local variable or method `invalid_ruby_code'/).to_stdout
+  end
+
+  it "executes shell command" do
+    allow(STDIN).to receive(:gets).and_return("ruby\n", "puts 'Hello from Ruby!'\n", "echo 'Hello from shell!'\n")
+    expect(main()).to include("Hello from shell!")
+  end
+
+  it "returns correct output for unknown programming language" do
+    allow(STDIN).to receive(:gets).and_return("java\n")
+    expect { main() }.to output(/Неизвестный язык: java/).to_stdout
+  end
+end