1 files changed, 29 insertions, 0 deletions
diff --git a/spec/rubyspec/core/string/unpack/shared/basic.rb b/spec/rubyspec/core/string/unpack/shared/basic.rb
new file mode 100644
index 0000000000..0ecbf615af
--- /dev/null
+++ b/spec/rubyspec/core/string/unpack/shared/basic.rb
@@ -0,0 +1,29 @@
+describe :string_unpack_basic, shared: true do
+  it "ignores whitespace in the format string" do
+    "abc".unpack("a \t\n\v\f\r"+unpack_format).should be_an_instance_of(Array)
+  end
+
+  it "calls #to_str to coerce the directives string" do
+    d = mock("unpack directive")
+    d.should_receive(:to_str).and_return("a"+unpack_format)
+    "abc".unpack(d).should be_an_instance_of(Array)
+  end
+
+  it "raises a TypeError when passed nil" do
+    lambda { "abc".unpack(nil) }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError when passed an Integer" do
+    lambda { "abc".unpack(1) }.should raise_error(TypeError)
+  end
+end
+
+describe :string_unpack_no_platform, shared: true do
+  it "raises an ArgumentError when the format modifier is '_'" do
+    lambda { "abcdefgh".unpack(unpack_format("_")) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an ArgumentError when the format modifier is '!'" do
+    lambda { "abcdefgh".unpack(unpack_format("!")) }.should raise_error(ArgumentError)
+  end
+end