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758914e1fb
SanitizeLabelName was not correctly sanitizing label names that: 1. Started with a digit (0-9) 2. Were empty This commit changes the santization code to catch both of these edge cases and adds new tests to validate it works correctly in them both. In the first case, a leading digit will be replaced with an underscore, and in the latter, the function will return a single underscore. Signed-off-by: Nick Moore <nicholas.moore@grafana.com>
70 lines
2.4 KiB
Go
70 lines
2.4 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package strutil
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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type linkTest struct {
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expression string
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expectedGraphLink string
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expectedTableLink string
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}
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var linkTests = []linkTest{
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{
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"sum(incoming_http_requests_total) by (system)",
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"/graph?g0.expr=sum%28incoming_http_requests_total%29+by+%28system%29&g0.tab=0",
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"/graph?g0.expr=sum%28incoming_http_requests_total%29+by+%28system%29&g0.tab=1",
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},
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{
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"sum(incoming_http_requests_total{system=\"trackmetadata\"})",
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"/graph?g0.expr=sum%28incoming_http_requests_total%7Bsystem%3D%22trackmetadata%22%7D%29&g0.tab=0",
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"/graph?g0.expr=sum%28incoming_http_requests_total%7Bsystem%3D%22trackmetadata%22%7D%29&g0.tab=1",
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},
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}
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func TestLink(t *testing.T) {
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for _, tt := range linkTests {
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graphLink := GraphLinkForExpression(tt.expression)
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require.Equal(t, tt.expectedGraphLink, graphLink,
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"GraphLinkForExpression failed for expression (%#q)", tt.expression)
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tableLink := TableLinkForExpression(tt.expression)
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require.Equal(t, tt.expectedTableLink, tableLink,
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"TableLinkForExpression failed for expression (%#q)", tt.expression)
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}
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}
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func TestSanitizeLabelName(t *testing.T) {
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actual := SanitizeLabelName("fooClientLABEL")
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expected := "fooClientLABEL"
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require.Equal(t, expected, actual, "SanitizeLabelName failed for label (%s)", expected)
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actual = SanitizeLabelName("barClient.LABEL$$##")
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expected = "barClient_LABEL____"
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require.Equal(t, expected, actual, "SanitizeLabelName failed for label (%s)", expected)
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actual = SanitizeLabelName("0zerothClient1LABEL")
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expected = "_zerothClient1LABEL"
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require.Equal(t, expected, actual, "SanitizeLabelName failed for label (%s)", expected)
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actual = SanitizeLabelName("")
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expected = "_"
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require.Equal(t, expected, actual, "SanitizeLabelName failed for the empty label")
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}
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