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tracing: support SamplingFraction (#5125)
* tracing: support SamplingFraction Signed-off-by: zirain <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // Copyright Envoy Gateway Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // The full text of the Apache license is available in the LICENSE file at | ||
| // the root of the repo. | ||
|
|
||
| package gatewayapi | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "k8s.io/utils/ptr" | ||
| gwapiv1 "sigs.k8s.io/gateway-api/apis/v1" | ||
|
|
||
| egv1a1 "github.com/envoyproxy/gateway/api/v1alpha1" | ||
| ) | ||
|
|
||
| func TestProxySamplingRate(t *testing.T) { | ||
| cases := []struct { | ||
| name string | ||
| tracing *egv1a1.ProxyTracing | ||
| expected float64 | ||
| }{ | ||
| { | ||
| name: "default", | ||
| tracing: &egv1a1.ProxyTracing{}, | ||
| expected: 100.0, | ||
| }, | ||
| { | ||
| name: "rate", | ||
| tracing: &egv1a1.ProxyTracing{ | ||
| SamplingRate: ptr.To[uint32](10), | ||
| }, | ||
| expected: 10.0, | ||
| }, | ||
| { | ||
| name: "fraction numerator only", | ||
| tracing: &egv1a1.ProxyTracing{ | ||
| SamplingFraction: &gwapiv1.Fraction{ | ||
| Numerator: 100, | ||
| }, | ||
| }, | ||
| expected: 1.0, | ||
| }, | ||
| { | ||
| name: "fraction", | ||
| tracing: &egv1a1.ProxyTracing{ | ||
| SamplingFraction: &gwapiv1.Fraction{ | ||
| Numerator: 1, | ||
| Denominator: ptr.To[int32](10), | ||
| }, | ||
| }, | ||
| expected: 0.1, | ||
| }, | ||
| { | ||
| name: "less than zero", | ||
| tracing: &egv1a1.ProxyTracing{ | ||
| SamplingFraction: &gwapiv1.Fraction{ | ||
| Numerator: 1, | ||
| Denominator: ptr.To[int32](-1), | ||
| }, | ||
| }, | ||
| expected: 0, | ||
| }, | ||
| { | ||
| name: "greater than 100", | ||
| tracing: &egv1a1.ProxyTracing{ | ||
| SamplingFraction: &gwapiv1.Fraction{ | ||
| Numerator: 101, | ||
| Denominator: ptr.To[int32](1), | ||
| }, | ||
| }, | ||
| expected: 100, | ||
| }, | ||
| } | ||
|
|
||
| for _, tc := range cases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| actual := proxySamplingRate(tc.tracing) | ||
| if actual != tc.expected { | ||
| t.Errorf("expected %v, got %v", tc.expected, actual) | ||
| } | ||
| }) | ||
| } | ||
| } |
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