Remove a test-only method (#16)

* Remove a test-only method

* update circle Go version

* simplify circleci

* mod update

Author: jmacd

.circleci/config.yml

@@ -4,13 +4,8 @@ jobs:
   test:
     working_directory: ~/go/src/github.com/lightstep/varopt
     docker:
-      - image: circleci/golang:1.13
+      - image: circleci/golang:1.15
     steps:
-      - run:
-          name: "configure environment"
-          command: |
-            echo 'export GOPATH="$HOME/go"' >> $BASH_ENV
-            source $BASH_ENV
       - checkout
       - run: go test -v ./...
 

go.mod

@@ -1,5 +1,5 @@
 module github.com/lightstep/varopt
 
-go 1.13
+go 1.15
 
 require github.com/stretchr/testify v1.4.0

go.sum

@@ -5,6 +5,7 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

simple/simple.go

@@ -53,17 +53,12 @@ func (s *Simple) Get(i int) varopt.Sample {
 	return s.buffer[i]
 }
 
-// Get returns the number of items in the sample.  If the reservoir is
+// Size returns the number of items in the sample.  If the reservoir is
 // full, Size() equals Capacity().
 func (s *Simple) Size() int {
 	return len(s.buffer)
 }
 
-// Weight returns the adjusted weight of each item in the sample.
-func (s *Simple) Weight() float64 {
-	return float64(s.observed) / float64(s.Size())
-}
-
 // Count returns the number of items that were observed.
 func (s *Simple) Count() int {
 	return s.observed

varopt_test.go

@@ -113,7 +113,7 @@ func testUnbiased(t *testing.T, bbr, bsr float64) {
 						ss.Add(s)
 					}
 
-					weight := ss.Weight()
+					weight := float64(ss.Count()) / float64(ss.Size())
 					for i := 0; i < ss.Size(); i++ {
 						vsample.Add(ss.Get(i), weight)
 					}