1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/core/string/clear_spec.rb b/spec/ruby/core/string/clear_spec.rb
new file mode 100644
index 0000000000..152986fd0f
--- /dev/null
+++ b/spec/ruby/core/string/clear_spec.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: false
+require_relative '../../spec_helper'
+
+describe "String#clear" do
+  before :each do
+    @s = "Jolene"
+  end
+
+  it "sets self equal to the empty String" do
+    @s.clear
+    @s.should == ""
+  end
+
+  it "returns self after emptying it" do
+    cleared = @s.clear
+    cleared.should == ""
+    cleared.should equal @s
+  end
+
+  it "preserves its encoding" do
+    @s.encode!(Encoding::SHIFT_JIS)
+    @s.encoding.should == Encoding::SHIFT_JIS
+    @s.clear.encoding.should == Encoding::SHIFT_JIS
+    @s.encoding.should == Encoding::SHIFT_JIS
+  end
+
+  it "works with multibyte Strings" do
+    s = "\u{9765}\u{876}"
+    s.clear
+    s.should == ""
+  end
+
+  it "raises a FrozenError if self is frozen" do
+    @s.freeze
+    -> { @s.clear        }.should raise_error(FrozenError)
+    -> { "".freeze.clear }.should raise_error(FrozenError)
+  end
+end