Added test on plugin/sampling/strategystore/adaptive/options (#5105)

## Which problem is this PR solving?
Part of  #5068 

## Description of the changes
- Added test to adaptive sampling plugin options

## How was this change tested?
- make test

## Checklist
- [x] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [x] I have signed all commits
- [x] I have added unit tests for the new functionality
- [x] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `yarn lint` and `yarn test`

---------

Signed-off-by: tarhphilomina <[email protected]>

plugin/sampling/strategystore/adaptive/options_test.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2024 The Jaeger Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package adaptive
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/jaegertracing/jaeger/pkg/config"
+)
+
+func TestOptionsWithFlags(t *testing.T) {
+	v, command := config.Viperize(AddFlags)
+	command.ParseFlags([]string{
+		"--sampling.target-samples-per-second=2.0",
+		"--sampling.delta-tolerance=0.6",
+		"--sampling.buckets-for-calculation=2",
+		"--sampling.calculation-interval=2m0s",
+		"--sampling.aggregation-buckets=20",
+		"--sampling.delay=6m0s",
+		"--sampling.initial-sampling-probability=0.002",
+		"--sampling.min-sampling-probability=1e-4",
+		"--sampling.min-samples-per-second=0.016666666666666666",
+		"--sampling.leader-lease-refresh-interval=5s",
+		"--sampling.follower-lease-refresh-interval=1m0s",
+	})
+	opts := &Options{}
+
+	opts.InitFromViper(v)
+
+	assert.Equal(t, 2.0, opts.TargetSamplesPerSecond)
+	assert.Equal(t, 0.6, opts.DeltaTolerance)
+	assert.Equal(t, 2, opts.BucketsForCalculation)
+	assert.Equal(t, time.Duration(120000000000), opts.CalculationInterval)
+	assert.Equal(t, 20, opts.AggregationBuckets)
+	assert.Equal(t, time.Duration(360000000000), opts.Delay)
+	assert.Equal(t, 0.002, opts.InitialSamplingProbability)
+	assert.Equal(t, 1e-4, opts.MinSamplingProbability)
+	assert.Equal(t, 0.016666666666666666, opts.MinSamplesPerSecond)
+	assert.Equal(t, time.Duration(5000000000), opts.LeaderLeaseRefreshInterval)
+	assert.Equal(t, time.Duration(60000000000), opts.FollowerLeaseRefreshInterval)
+}