1 files changed, 73 insertions, 0 deletions
diff --git a/spec/ruby/core/array/pack/a_spec.rb b/spec/ruby/core/array/pack/a_spec.rb
new file mode 100644
index 0000000000..8245cd5470
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+++ b/spec/ruby/core/array/pack/a_spec.rb
@@ -0,0 +1,73 @@
+# encoding: binary
+require_relative '../../../spec_helper'
+require_relative '../fixtures/classes'
+require_relative 'shared/basic'
+require_relative 'shared/string'
+require_relative 'shared/taint'
+
+describe "Array#pack with format 'A'" do
+  it_behaves_like :array_pack_basic, 'A'
+  it_behaves_like :array_pack_basic_non_float, 'A'
+  it_behaves_like :array_pack_no_platform, 'A'
+  it_behaves_like :array_pack_string, 'A'
+  it_behaves_like :array_pack_taint, 'A'
+
+  it "calls #to_str to convert an Object to a String" do
+    obj = mock("pack A string")
+    obj.should_receive(:to_str).and_return("``abcdef")
+    [obj].pack("A*").should == "``abcdef"
+  end
+
+  it "will not implicitly convert a number to a string" do
+    -> { [0].pack('A') }.should raise_error(TypeError)
+    -> { [0].pack('a') }.should raise_error(TypeError)
+  end
+
+  it "adds all the bytes to the output when passed the '*' modifier" do
+    ["abc"].pack("A*").should == "abc"
+  end
+
+  it "pads the output with spaces when the count exceeds the size of the String" do
+    ["abc"].pack("A6").should == "abc   "
+  end
+
+  it "adds a space when the value is nil" do
+    [nil].pack("A").should == " "
+  end
+
+  it "pads the output with spaces when the value is nil" do
+    [nil].pack("A3").should == "   "
+  end
+
+  it "does not pad with spaces when passed the '*' modifier and the value is nil" do
+    [nil].pack("A*").should == ""
+  end
+end
+
+describe "Array#pack with format 'a'" do
+  it_behaves_like :array_pack_basic, 'a'
+  it_behaves_like :array_pack_basic_non_float, 'a'
+  it_behaves_like :array_pack_no_platform, 'a'
+  it_behaves_like :array_pack_string, 'a'
+  it_behaves_like :array_pack_taint, 'a'
+
+  it "adds all the bytes to the output when passed the '*' modifier" do
+    ["abc"].pack("a*").should == "abc"
+  end
+
+  it "pads the output with NULL bytes when the count exceeds the size of the String" do
+    ["abc"].pack("a6").should == "abc\x00\x00\x00"
+  end
+
+  it "adds a NULL byte when the value is nil" do
+    [nil].pack("a").should == "\x00"
+  end
+
+  it "pads the output with NULL bytes when the value is nil" do
+    [nil].pack("a3").should == "\x00\x00\x00"
+  end
+
+  it "does not pad with NULL bytes when passed the '*' modifier and the value is nil" do
+    [nil].pack("a*").should == ""
+  end
+end