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Diffstat (limited to 'spec/ruby/core/string/unpack/h_spec.rb')
-rw-r--r-- | spec/ruby/core/string/unpack/h_spec.rb | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/spec/ruby/core/string/unpack/h_spec.rb b/spec/ruby/core/string/unpack/h_spec.rb new file mode 100644 index 0000000000..00d6d68eee --- /dev/null +++ b/spec/ruby/core/string/unpack/h_spec.rb @@ -0,0 +1,124 @@ +# -*- encoding: ascii-8bit -*- +require File.expand_path('../../../../spec_helper', __FILE__) +require File.expand_path('../../fixtures/classes', __FILE__) +require File.expand_path('../shared/basic', __FILE__) + +describe "String#unpack with format 'H'" do + it_behaves_like :string_unpack_basic, 'H' + it_behaves_like :string_unpack_no_platform, 'H' + + it "decodes one nibble from each byte for each format character starting with the most significant bit" do + [ ["\x8f", "H", ["8"]], + ["\xf8\x0f", "HH", ["f", "0"]] + ].should be_computed_by(:unpack) + end + + it "decodes only the number of nibbles in the string when passed a count" do + "\xca\xfe".unpack("H5").should == ["cafe"] + end + + it "decodes multiple differing nibble counts from a single string" do + array = "\xaa\x55\xaa\xd4\xc3\x6b\xd7\xaa\xd7".unpack("HH2H3H4H5") + array.should == ["a", "55", "aad", "c36b", "d7aad"] + end + + it "decodes a directive with a '*' modifier after a directive with a count modifier" do + "\xaa\x55\xaa\xd4\xc3\x6b".unpack("H3H*").should == ["aa5", "aad4c36b"] + end + + it "decodes a directive with a count modifier after a directive with a '*' modifier" do + "\xaa\x55\xaa\xd4\xc3\x6b".unpack("H*H3").should == ["aa55aad4c36b", ""] + end + + it "decodes the number of nibbles specified by the count modifier" do + [ ["\xab", "H0", [""]], + ["\x00", "H1", ["0"]], + ["\x01", "H2", ["01"]], + ["\x01\x23", "H3", ["012"]], + ["\x01\x23", "H4", ["0123"]], + ["\x01\x23\x45", "H5", ["01234"]] + ].should be_computed_by(:unpack) + end + + it "decodes all the nibbles when passed the '*' modifier" do + [ ["", [""]], + ["\xab", ["ab"]], + ["\xca\xfe", ["cafe"]], + ].should be_computed_by(:unpack, "H*") + end + + it "adds an empty string for each element requested beyond the end of the String" do + [ ["", ["", "", ""]], + ["\x01", ["0", "", ""]], + ["\x01\x80", ["0", "8", ""]] + ].should be_computed_by(:unpack, "HHH") + end + + it "ignores NULL bytes between directives" do + "\x01\x10".unpack("H\x00H").should == ["0", "1"] + end + + it "ignores spaces between directives" do + "\x01\x10".unpack("H H").should == ["0", "1"] + end +end + +describe "String#unpack with format 'h'" do + it_behaves_like :string_unpack_basic, 'h' + it_behaves_like :string_unpack_no_platform, 'h' + + it "decodes one nibble from each byte for each format character starting with the least significant bit" do + [ ["\x8f", "h", ["f"]], + ["\xf8\x0f", "hh", ["8", "f"]] + ].should be_computed_by(:unpack) + end + + it "decodes only the number of nibbles in the string when passed a count" do + "\xac\xef".unpack("h5").should == ["cafe"] + end + + it "decodes multiple differing nibble counts from a single string" do + array = "\xaa\x55\xaa\xd4\xc3\x6b\xd7\xaa\xd7".unpack("hh2h3h4h5") + array.should == ["a", "55", "aa4", "3cb6", "7daa7"] + end + + it "decodes a directive with a '*' modifier after a directive with a count modifier" do + "\xba\x55\xaa\xd4\xc3\x6b".unpack("h3h*").should == ["ab5", "aa4d3cb6"] + end + + it "decodes a directive with a count modifier after a directive with a '*' modifier" do + "\xba\x55\xaa\xd4\xc3\x6b".unpack("h*h3").should == ["ab55aa4d3cb6", ""] + end + + it "decodes the number of nibbles specified by the count modifier" do + [ ["\xab", "h0", [""]], + ["\x00", "h1", ["0"]], + ["\x01", "h2", ["10"]], + ["\x01\x23", "h3", ["103"]], + ["\x01\x23", "h4", ["1032"]], + ["\x01\x23\x45", "h5", ["10325"]] + ].should be_computed_by(:unpack) + end + + it "decodes all the nibbles when passed the '*' modifier" do + [ ["", [""]], + ["\xab", ["ba"]], + ["\xac\xef", ["cafe"]], + ].should be_computed_by(:unpack, "h*") + end + + it "adds an empty string for each element requested beyond the end of the String" do + [ ["", ["", "", ""]], + ["\x01", ["1", "", ""]], + ["\x01\x80", ["1", "0", ""]] + ].should be_computed_by(:unpack, "hhh") + end + + it "ignores NULL bytes between directives" do + "\x01\x10".unpack("h\x00h").should == ["1", "0"] + end + + it "ignores spaces between directives" do + "\x01\x10".unpack("h h").should == ["1", "0"] + end +end |