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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package promql
import (
"testing"
)
func TestExprString(t *testing.T) {
// A list of valid expressions that are expected to be
// returned as out when calling String(). If out is empty the output
// is expected to equal the input.
inputs := []struct {
in, out string
}{
{
in: `sum by() (task:errors:rate10s{job="s"})`,
out: `sum(task:errors:rate10s{job="s"})`,
},
{
in: `sum by(code) (task:errors:rate10s{job="s"})`,
},
{
in: `sum without() (task:errors:rate10s{job="s"})`,
},
{
in: `sum without(instance) (task:errors:rate10s{job="s"})`,
},
{
in: `topk(5, task:errors:rate10s{job="s"})`,
},
{
in: `count_values("value", task:errors:rate10s{job="s"})`,
},
{
in: `a - on() c`,
},
{
in: `a - on(b) c`,
},
{
in: `a - on(b) group_left(x) c`,
},
{
in: `a - on(b) group_left(x, y) c`,
},
{
in: `a - on(b) group_left c`,
out: `a - on(b) group_left() c`,
},
{
in: `a - on(b) group_left() (c)`,
},
{
in: `a - ignoring(b) c`,
},
{
in: `a - ignoring() c`,
out: `a - c`,
},
{
in: `up > bool 0`,
},
{
in: `a offset 1m`,
},
{
in: `a{c="d"}[5m] offset 1m`,
},
{
in: `a[5m] offset 1m`,
},
}
for _, test := range inputs {
expr, err := ParseExpr(test.in)
if err != nil {
t.Fatalf("parsing error for %q: %s", test.in, err)
}
exp := test.in
if test.out != "" {
exp = test.out
}
if expr.String() != exp {
t.Fatalf("expected %q to be returned as:\n%s\ngot:\n%s\n", test.in, exp, expr.String())
}
}
}
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