1 files changed, 61 insertions, 39 deletions
diff --git a/spec/ruby/core/io/pwrite_spec.rb b/spec/ruby/core/io/pwrite_spec.rb
index 929ed08698..c318d551bc 100644
--- a/spec/ruby/core/io/pwrite_spec.rb
+++ b/spec/ruby/core/io/pwrite_spec.rb
@@ -1,45 +1,67 @@
 # -*- encoding: utf-8 -*-
 require_relative '../../spec_helper'
 
-ruby_version_is "2.5" do
-  platform_is_not :windows do
-    describe "IO#pwrite" do
-      before :each do
-        @fname = tmp("io_pwrite.txt")
-        @file = File.open(@fname, "w+")
-      end
-
-      after :each do
-        @file.close
-        rm_r @fname
-      end
-
-      it "returns the number of bytes written" do
-        @file.pwrite("foo", 0).should == 3
-      end
-
-      it "accepts a string and an offset"  do
-        @file.pwrite("foo", 2)
-        @file.pread(3, 2).should == "foo"
-      end
-
-      it "does not advance the pointer in the file" do
-        @file.pwrite("bar", 3)
-        @file.write("foo")
-        @file.pread(6, 0).should == "foobar"
-      end
-
-      it "raises IOError when file is not open in write mode" do
-        File.open(@fname, "r") do |file|
-          -> { file.pwrite("foo", 1) }.should raise_error(IOError)
-        end
-      end
-
-      it "raises IOError when file is closed" do
-        file = File.open(@fname, "w+")
-        file.close
-        -> { file.pwrite("foo", 1) }.should raise_error(IOError)
-      end
+describe "IO#pwrite" do
+  before :each do
+    @fname = tmp("io_pwrite.txt")
+    @file = File.open(@fname, "w+")
+  end
+
+  after :each do
+    @file.close
+    rm_r @fname
+  end
+
+  it "returns the number of bytes written" do
+    @file.pwrite("foo", 0).should == 3
+  end
+
+  it "accepts a string and an offset"  do
+    @file.pwrite("foo", 2)
+    @file.pread(3, 2).should == "foo"
+  end
+
+  it "does not advance the pointer in the file" do
+    @file.pwrite("bar", 3)
+    @file.write("foo")
+    @file.pread(6, 0).should == "foobar"
+  end
+
+  it "calls #to_s on the object to be written" do
+    object = mock("to_s")
+    object.should_receive(:to_s).and_return("foo")
+    @file.pwrite(object, 0)
+    @file.pread(3, 0).should == "foo"
+  end
+
+  it "calls #to_int on the offset" do
+    offset = mock("to_int")
+    offset.should_receive(:to_int).and_return(2)
+    @file.pwrite("foo", offset)
+    @file.pread(3, 2).should == "foo"
+  end
+
+  it "raises IOError when file is not open in write mode" do
+    File.open(@fname, "r") do |file|
+      -> { file.pwrite("foo", 1) }.should.raise(IOError, "not opened for writing")
     end
   end
+
+  it "raises IOError when file is closed" do
+    file = File.open(@fname, "w+")
+    file.close
+    -> { file.pwrite("foo", 1) }.should.raise(IOError, "closed stream")
+  end
+
+  it "raises a NoMethodError if object does not respond to #to_s" do
+    -> {
+      @file.pwrite(BasicObject.new, 0)
+    }.should.raise(NoMethodError, /undefined method [`']to_s'/)
+  end
+
+  it "raises a TypeError if the offset cannot be converted to an Integer" do
+    -> {
+      @file.pwrite("foo", Object.new)
+    }.should.raise(TypeError, "no implicit conversion of Object into Integer")
+  end
 end