mirror of
https://github.com/tailscale/tailscale.git
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dd5548771e
The prefix is a signal to tsweb to treat this as a gauge metric when generating the Prometheus version. Signed-off-by: Mihai Parparita <mihai@tailscale.com>
76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package clientmetric
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import (
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"testing"
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"time"
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)
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func TestDeltaEncBuf(t *testing.T) {
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var enc deltaEncBuf
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enc.writeName("one_one", TypeCounter)
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enc.writeValue(1, 1)
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enc.writeName("two_zero", TypeGauge)
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enc.writeValue(2, 0)
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enc.writeDelta(1, 63)
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enc.writeDelta(2, 64)
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enc.writeDelta(1, -65)
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enc.writeDelta(2, -64)
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got := enc.buf.String()
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const want = "N0eone_oneS0202N1cgauge_two_zeroS0400I027eI048001I028101I047f"
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if got != want {
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t.Errorf("error\n got %q\nwant %q\n", got, want)
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}
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}
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func clearMetrics() {
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mu.Lock()
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defer mu.Unlock()
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metrics = map[string]*Metric{}
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numWireID = 0
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lastDelta = time.Time{}
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sorted = nil
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lastLogVal = nil
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unsorted = nil
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}
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func advanceTime() {
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mu.Lock()
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defer mu.Unlock()
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lastDelta = time.Time{}
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}
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func TestEncodeLogTailMetricsDelta(t *testing.T) {
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clearMetrics()
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c1 := NewCounter("foo")
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c2 := NewGauge("bar")
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c1.Add(123)
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if got, want := EncodeLogTailMetricsDelta(), "N06fooS02f601"; got != want {
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t.Errorf("first = %q; want %q", got, want)
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}
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c2.Add(456)
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advanceTime()
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if got, want := EncodeLogTailMetricsDelta(), "N12gauge_barS049007"; got != want {
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t.Errorf("second = %q; want %q", got, want)
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}
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advanceTime()
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if got, want := EncodeLogTailMetricsDelta(), ""; got != want {
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t.Errorf("with no changes = %q; want %q", got, want)
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}
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c1.Add(1)
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c2.Add(2)
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advanceTime()
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if got, want := EncodeLogTailMetricsDelta(), "I0202I0404"; got != want {
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t.Errorf("with increments = %q; want %q", got, want)
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}
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}
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