func (*writerBasicsSuite) TestReplaceDefaultWriterWithNil(c *gc.C) {
oldWriter, err := loggo.ReplaceDefaultWriter(nil)
c.Assert(oldWriter, gc.IsNil)
c.Assert(err, gc.ErrorMatches, "Writer cannot be nil")
}
func (*writerBasicsSuite) TestReplaceDefaultWriterNoDefault(c *gc.C) {
loggo.RemoveWriter("default")
oldWriter, err := loggo.ReplaceDefaultWriter(&loggo.TestWriter{})
c.Assert(oldWriter, gc.IsNil)
c.Assert(err, gc.ErrorMatches, `there is no "default" writer`)
}
func (*writerBasicsSuite) TestReplaceDefaultWriter(c *gc.C) {
oldWriter, err := loggo.ReplaceDefaultWriter(&loggo.TestWriter{})
c.Assert(oldWriter, gc.NotNil)
c.Assert(err, gc.IsNil)
}