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5e2d1c1464
`keep_common` is more in line with the function name `drop_common_labels()` terminology-wise, and also more in line with `group_left`/`group_right` (no `...ing` verb suffix). We could also go the full way and call it `keep_common_labels`. That would have the benefit of being even more consistent with the function `drop_common_labels()` and would be more explanatory, but it also seems quite long.
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// Copyright 2015 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 promql
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import (
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"testing"
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)
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func TestExprString(t *testing.T) {
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// A list of valid expressions that are expected to be
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// returned as out when calling String(). If out is empty the output
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// is expected to equal the input.
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inputs := []struct {
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in, out string
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}{
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{
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in: `sum(task:errors:rate10s{job="s"}) BY (code)`,
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},
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{
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in: `sum(task:errors:rate10s{job="s"}) BY (code) KEEP_COMMON`,
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},
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}
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for _, test := range inputs {
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expr, err := ParseExpr(test.in)
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if err != nil {
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t.Fatalf("parsing error for %q: %s", test.in, err)
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}
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exp := test.in
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if test.out != "" {
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exp = test.out
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}
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if expr.String() != exp {
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t.Fatalf("expected %q to be returned as:\n%s\ngot:\n%s\n", test.in, exp, expr.String())
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}
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}
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}
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