feat: add answer function, will output pipe read

Author: initdc

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    cr-exec (0.1.1)
+    cr-exec (0.2.0)
 
 GEM
   remote: https://rubygems.org/

lib/cr/exec.rb

@@ -39,6 +39,18 @@ def each_line(*args, chomp: false, **options, &block)
       end
     end
 
+    def answer(*args, input: nil, **options)
+      IO.popen(*args, **options) do |pipe|
+        if input.is_a? Array
+          input.each { |cmd| pipe.puts(cmd) }
+        else
+           pipe.puts(input)
+        end
+        pipe.close_write
+        pipe.read
+      end
+    end
+
     def system?(...)
       system(...) ? true : false
     end

lib/cr/exec/version.rb

@@ -2,6 +2,6 @@
 
 module Cr
   module Exec
-    VERSION = "0.1.1"
+    VERSION = "0.2.0"
   end
 end

spec/cr/exec_spec.rb

@@ -55,6 +55,30 @@
     expect(Cr::Exec.each_line({ "FOO" => "bar" }, "echo $FOO", chomp: true)).to eq ["bar"]
   end
 
+  it "answer no need input" do
+    expect(Cr::Exec.answer("uname", "r+")).to eq "Linux\n"
+  end
+
+  it "answer with cmd" do
+    expect(Cr::Exec.answer("bash", "r+", input: "uname")).to eq "Linux\n"
+  end
+
+  it "answer with cmd array" do
+    expect(Cr::Exec.answer("bash", "r+", input: %w[uname uname])).to eq "Linux\nLinux\n"
+  end
+
+  it "answer with space included cmd array" do
+    expect(Cr::Exec.answer("bash", "r+", input: ["ls spec", "uname"])).to eq "cr\nspec_helper.rb\nLinux\n"
+  end
+
+  it "answer with ruby embbed cmd" do
+    expect(Cr::Exec.answer("bash", "r+", input: "echo #{Array(1..5)}")).to eq "[1, 2, 3, 4, 5]\n"
+  end
+
+  it "answer with ruby array" do
+    expect(Cr::Exec.answer("bash", "r+", input: Array.new(2, "uname"))).to eq "Linux\nLinux\n"
+  end
+
   it "always return bool" do
     p system("unamea")
     expect(Cr::Exec.system?("unamea")).to eq false