Refactor a bit.

mathrand_test.go

Index: mathrand_test.go
diff --git a/mathrand_test.go b/mathrand_test.go
deleted file mode 100644
index 1c572e39772e4a96230524ae67b8e535e437e4a0..0000000000000000000000000000000000000000
--- a/mathrand_test.go
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package gae
-
-import (
-	"math/rand"
-	"testing"
-	"time"
-
-	"github.com/luci/luci-go/common/clock/testclock"
-	. "github.com/smartystreets/goconvey/convey"
-	"golang.org/x/net/context"
-)
-
-func TestMathRand(t *testing.T) {
-	t.Parallel()
-
-	Convey("test mathrand", t, func() {
-		now := time.Date(2015, 1, 1, 0, 0, 0, 0, time.UTC)
-		c, _ := testclock.UseTime(context.Background(), now)
-
-		// Note that the non-randomness below is because time is fixed at the
-		// top of the outer test function. Normally it would evolve with time.
-		Convey("unset", func() {
-			r := rand.New(rand.NewSource(now.UnixNano()))
-			i := r.Int()
-			So(GetMathRand(c).Int(), ShouldEqual, i)
-			So(GetMathRand(c).Int(), ShouldEqual, i)
-		})
-
-		Convey("set persistance", func() {
-			c = SetMathRand(c, rand.New(rand.NewSource(now.UnixNano())))
-			r := rand.New(rand.NewSource(now.UnixNano()))
-			So(GetMathRand(c).Int(), ShouldEqual, r.Int())
-			So(GetMathRand(c).Int(), ShouldEqual, r.Int())
-		})
-
-		Convey("nil set", func() {
-			c = SetMathRand(c, nil)
-			r := rand.New(rand.NewSource(now.UnixNano()))
-			i := r.Int()
-			So(GetMathRand(c).Int(), ShouldEqual, i)
-			So(GetMathRand(c).Int(), ShouldEqual, i)
-		})
-	})
-}