Add tests for Generic.

Author: ioquatix

lib/io/stream/generic.rb

@@ -35,7 +35,7 @@ def close
 			return if closed?
 
 			begin
-				flush
+				self.flush
 			rescue
 				# We really can't do anything here unless we want #close to raise exceptions.
 			ensure

test/io/stream/generic.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# Released under the MIT License.
+# Copyright, 2025, by Samuel Williams.
+
+require "io/stream/generic"
+
+describe IO::Stream::Generic do
+	let(:stream) {subject.new}
+	
+	with "#closed?" do
+		it "should return false by default" do
+			expect(stream.closed?).to be_falsey
+		end
+	end
+	
+	with "#read" do
+		it "should raise NotImplementedError" do
+			expect{stream.read(10)}.to raise_exception(NotImplementedError)
+		end
+	end
+	
+	with "#flush" do
+		it "should raise NotImplementedError" do
+			expect{stream.write("hello"); stream.flush}.to raise_exception(NotImplementedError)
+		end
+	end
+	
+	with "#close" do
+		it "should raise NotImplementedError" do
+			expect{stream.close}.to raise_exception(NotImplementedError)
+		end
+	end
+end