1 files changed, 107 insertions, 0 deletions
diff --git a/spec/ruby/core/io/eof_spec.rb b/spec/ruby/core/io/eof_spec.rb
new file mode 100644
index 0000000000..c8955abde0
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+++ b/spec/ruby/core/io/eof_spec.rb
@@ -0,0 +1,107 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "IO#eof?" do
+  before :each do
+    @name = tmp("empty.txt")
+    touch @name
+  end
+
+  after :each do
+    rm_r @name
+  end
+
+  it "returns true on an empty stream that has just been opened" do
+    File.open(@name) { |empty| empty.should.eof? }
+  end
+
+  it "raises IOError on stream not opened for reading" do
+    -> do
+      File.open(@name, "w") { |f| f.eof? }
+    end.should.raise(IOError)
+  end
+end
+
+describe "IO#eof?" do
+  before :each do
+    @name = fixture __FILE__, "lines.txt"
+    @io = IOSpecs.io_fixture "lines.txt"
+  end
+
+  after :each do
+    @io.close if @io && !@io.closed?
+  end
+
+  it "returns false when not at end of file" do
+    @io.read 1
+    @io.should_not.eof?
+  end
+
+  it "returns true after reading with read with no parameters" do
+    @io.read()
+    @io.should.eof?
+  end
+
+  it "returns true after reading with read" do
+    @io.read(File.size(@name))
+    @io.should.eof?
+  end
+
+  it "returns true after reading with sysread" do
+    @io.sysread(File.size(@name))
+    @io.should.eof?
+  end
+
+  it "returns true after reading with readlines" do
+    @io.readlines
+    @io.should.eof?
+  end
+
+  it "returns false on just opened non-empty stream" do
+    @io.should_not.eof?
+  end
+
+  it "does not consume the data from the stream" do
+    @io.should_not.eof?
+    @io.getc.should == 'V'
+  end
+
+  it "raises IOError on closed stream" do
+    -> { IOSpecs.closed_io.eof? }.should.raise(IOError)
+  end
+
+  it "raises IOError on stream closed for reading by close_read" do
+    @io.close_read
+    -> { @io.eof? }.should.raise(IOError)
+  end
+
+  it "returns true on one-byte stream after single-byte read" do
+    File.open(__dir__ + '/fixtures/one_byte.txt') { |one_byte|
+      one_byte.read(1)
+      one_byte.should.eof?
+    }
+  end
+end
+
+describe "IO#eof?" do
+  after :each do
+    @r.close if @r && !@r.closed?
+    @w.close if @w && !@w.closed?
+  end
+
+  it "returns true on receiving side of Pipe when writing side is closed" do
+    @r, @w = IO.pipe
+    @w.close
+    @r.should.eof?
+  end
+
+  it "returns false on receiving side of Pipe when writing side wrote some data" do
+    @r, @w = IO.pipe
+    @w.puts "hello"
+    @r.should_not.eof?
+    @w.close
+    @r.should_not.eof?
+    @r.read
+    @r.should.eof?
+  end
+end