prometheus/promql/parse_test.go

1078 lines
27 KiB
Go

// 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 (
"fmt"
"math"
"reflect"
"testing"
"time"
clientmodel "github.com/prometheus/client_golang/model"
"github.com/prometheus/prometheus/storage/metric"
)
var testExpr = []struct {
input string
expected Expr
fail bool
}{
// Scalars and scalar-to-scalar operations.
{
input: "1",
expected: &NumberLiteral{1},
}, {
input: "+Inf",
expected: &NumberLiteral{clientmodel.SampleValue(math.Inf(1))},
}, {
input: "-Inf",
expected: &NumberLiteral{clientmodel.SampleValue(math.Inf(-1))},
}, {
input: ".5",
expected: &NumberLiteral{0.5},
}, {
input: "5.",
expected: &NumberLiteral{5},
}, {
input: "123.4567",
expected: &NumberLiteral{123.4567},
}, {
input: "5e-3",
expected: &NumberLiteral{0.005},
}, {
input: "5e3",
expected: &NumberLiteral{5000},
}, {
input: "0xc",
expected: &NumberLiteral{12},
}, {
input: "0755",
expected: &NumberLiteral{493},
}, {
input: "+5.5e-3",
expected: &NumberLiteral{0.0055},
}, {
input: "-0755",
expected: &NumberLiteral{-493},
}, {
input: "1 + 1",
expected: &BinaryExpr{itemADD, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 - 1",
expected: &BinaryExpr{itemSUB, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 * 1",
expected: &BinaryExpr{itemMUL, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 % 1",
expected: &BinaryExpr{itemMOD, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 / 1",
expected: &BinaryExpr{itemDIV, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 == 1",
expected: &BinaryExpr{itemEQL, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 != 1",
expected: &BinaryExpr{itemNEQ, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 > 1",
expected: &BinaryExpr{itemGTR, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 >= 1",
expected: &BinaryExpr{itemGTE, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 < 1",
expected: &BinaryExpr{itemLSS, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "1 <= 1",
expected: &BinaryExpr{itemLTE, &NumberLiteral{1}, &NumberLiteral{1}, nil},
}, {
input: "+1 + -2 * 1",
expected: &BinaryExpr{
Op: itemADD,
LHS: &NumberLiteral{1},
RHS: &BinaryExpr{
Op: itemMUL, LHS: &NumberLiteral{-2}, RHS: &NumberLiteral{1},
},
},
}, {
input: "1 + 2/(3*1)",
expected: &BinaryExpr{
Op: itemADD,
LHS: &NumberLiteral{1},
RHS: &BinaryExpr{
Op: itemDIV,
LHS: &NumberLiteral{2},
RHS: &ParenExpr{&BinaryExpr{
Op: itemMUL, LHS: &NumberLiteral{3}, RHS: &NumberLiteral{1},
}},
},
},
}, {
input: "", fail: true,
}, {
input: "# just a comment\n\n", fail: true,
}, {
input: "1+", fail: true,
}, {
input: "2.5.", fail: true,
}, {
input: "100..4", fail: true,
}, {
input: "0deadbeef", fail: true,
}, {
input: "1 /", fail: true,
}, {
input: "*1", fail: true,
}, {
input: "(1))", fail: true,
}, {
input: "((1)", fail: true,
}, {
input: "(", fail: true,
}, {
input: "1 and 1", fail: true,
}, {
input: "1 or 1", fail: true,
}, {
input: "1 !~ 1", fail: true,
}, {
input: "1 =~ 1", fail: true,
}, {
input: "-some_metric", fail: true,
}, {
input: `-"string"`, fail: true,
},
// Vector binary operations.
{
input: "foo * bar",
expected: &BinaryExpr{
Op: itemMUL,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{Card: CardOneToOne},
},
}, {
input: "foo == 1",
expected: &BinaryExpr{
Op: itemEQL,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &NumberLiteral{1},
},
}, {
input: "2.5 / bar",
expected: &BinaryExpr{
Op: itemDIV,
LHS: &NumberLiteral{2.5},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
},
}, {
input: "foo and bar",
expected: &BinaryExpr{
Op: itemLAND,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{Card: CardManyToMany},
},
}, {
input: "foo or bar",
expected: &BinaryExpr{
Op: itemLOR,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{Card: CardManyToMany},
},
}, {
// Test and/or precedence and reassigning of operands.
input: "foo + bar or bla and blub",
expected: &BinaryExpr{
Op: itemLOR,
LHS: &BinaryExpr{
Op: itemADD,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{Card: CardOneToOne},
},
RHS: &BinaryExpr{
Op: itemLAND,
LHS: &VectorSelector{
Name: "bla",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bla"},
},
},
RHS: &VectorSelector{
Name: "blub",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "blub"},
},
},
VectorMatching: &VectorMatching{Card: CardManyToMany},
},
VectorMatching: &VectorMatching{Card: CardManyToMany},
},
}, {
// Test precedence and reassigning of operands.
input: "bar + on(foo) bla / on(baz, buz) group_right(test) blub",
expected: &BinaryExpr{
Op: itemADD,
LHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
RHS: &BinaryExpr{
Op: itemDIV,
LHS: &VectorSelector{
Name: "bla",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bla"},
},
},
RHS: &VectorSelector{
Name: "blub",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "blub"},
},
},
VectorMatching: &VectorMatching{
Card: CardOneToMany,
On: clientmodel.LabelNames{"baz", "buz"},
Include: clientmodel.LabelNames{"test"},
},
},
VectorMatching: &VectorMatching{
Card: CardOneToOne,
On: clientmodel.LabelNames{"foo"},
},
},
}, {
input: "foo * on(test,blub) bar",
expected: &BinaryExpr{
Op: itemMUL,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{
Card: CardOneToOne,
On: clientmodel.LabelNames{"test", "blub"},
},
},
}, {
input: "foo and on(test,blub) bar",
expected: &BinaryExpr{
Op: itemLAND,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{
Card: CardManyToMany,
On: clientmodel.LabelNames{"test", "blub"},
},
},
}, {
input: "foo / on(test,blub) group_left(bar) bar",
expected: &BinaryExpr{
Op: itemDIV,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{
Card: CardManyToOne,
On: clientmodel.LabelNames{"test", "blub"},
Include: clientmodel.LabelNames{"bar"},
},
},
}, {
input: "foo - on(test,blub) group_right(bar,foo) bar",
expected: &BinaryExpr{
Op: itemSUB,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
VectorMatching: &VectorMatching{
Card: CardOneToMany,
On: clientmodel.LabelNames{"test", "blub"},
Include: clientmodel.LabelNames{"bar", "foo"},
},
},
}, {
input: "foo and 1", fail: true,
}, {
input: "1 and foo", fail: true,
}, {
input: "foo or 1", fail: true,
}, {
input: "1 or foo", fail: true,
}, {
input: "1 or on(bar) foo", fail: true,
}, {
input: "foo == on(bar) 10", fail: true,
}, {
input: "foo and on(bar) group_left(baz) bar", fail: true,
}, {
input: "foo and on(bar) group_right(baz) bar", fail: true,
}, {
input: "foo or on(bar) group_left(baz) bar", fail: true,
}, {
input: "foo or on(bar) group_right(baz) bar", fail: true,
},
// Test vector selector.
{
input: "foo",
expected: &VectorSelector{
Name: "foo",
Offset: 0,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
}, {
input: "foo offset 5m",
expected: &VectorSelector{
Name: "foo",
Offset: 5 * time.Minute,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
}, {
input: `foo:bar{a="b"}`,
expected: &VectorSelector{
Name: "foo:bar",
Offset: 0,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: "a", Value: "b"},
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo:bar"},
},
},
}, {
input: `foo{NaN='b'}`,
expected: &VectorSelector{
Name: "foo",
Offset: 0,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: "NaN", Value: "b"},
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
}, {
input: `foo{a="b", foo!="bar", test=~"test", bar!~"baz"}`,
expected: &VectorSelector{
Name: "foo",
Offset: 0,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: "a", Value: "b"},
{Type: metric.NotEqual, Name: "foo", Value: "bar"},
mustLabelMatcher(metric.RegexMatch, "test", "test"),
mustLabelMatcher(metric.RegexNoMatch, "bar", "baz"),
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
}, {
input: `{`, fail: true,
}, {
input: `}`, fail: true,
}, {
input: `some{`, fail: true,
}, {
input: `some}`, fail: true,
}, {
input: `some_metric{a=b}`, fail: true,
}, {
input: `some_metric{a:b="b"}`, fail: true,
}, {
input: `foo{a*"b"}`, fail: true,
}, {
input: `foo{a>="b"}`, fail: true,
}, {
input: `foo{gibberish}`, fail: true,
}, {
input: `foo{1}`, fail: true,
}, {
input: `{}`, fail: true,
}, {
input: `foo{__name__="bar"}`, fail: true,
}, {
input: `:foo`, fail: true,
},
// Test matrix selector.
{
input: "test[5s]",
expected: &MatrixSelector{
Name: "test",
Offset: 0,
Range: 5 * time.Second,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
},
},
}, {
input: "test[5m]",
expected: &MatrixSelector{
Name: "test",
Offset: 0,
Range: 5 * time.Minute,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
},
},
}, {
input: "test[5h] OFFSET 5m",
expected: &MatrixSelector{
Name: "test",
Offset: 5 * time.Minute,
Range: 5 * time.Hour,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
},
},
}, {
input: "test[5d] OFFSET 10s",
expected: &MatrixSelector{
Name: "test",
Offset: 10 * time.Second,
Range: 5 * 24 * time.Hour,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
},
},
}, {
input: "test[5w] offset 2w",
expected: &MatrixSelector{
Name: "test",
Offset: 14 * 24 * time.Hour,
Range: 5 * 7 * 24 * time.Hour,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
},
},
}, {
input: `test{a="b"}[5y] OFFSET 3d`,
expected: &MatrixSelector{
Name: "test",
Offset: 3 * 24 * time.Hour,
Range: 5 * 365 * 24 * time.Hour,
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: "a", Value: "b"},
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "test"},
},
},
}, {
input: `foo[5mm]`, fail: true,
}, {
input: `foo[0m]`, fail: true,
}, {
input: `foo[5m30s]`, fail: true,
}, {
input: `foo[5m] OFFSET 1h30m`, fail: true,
}, {
input: `foo[]`, fail: true,
}, {
input: `foo[1]`, fail: true,
}, {
input: `some_metric[5m] OFFSET 1`, fail: true,
}, {
input: `some_metric[5m] OFFSET 1mm`, fail: true,
}, {
input: `some_metric[5m] OFFSET`, fail: true,
}, {
input: `(foo + bar)[5m]`, fail: true,
},
// Test aggregation.
{
input: "sum by (foo)(some_metric)",
expected: &AggregateExpr{
Op: itemSum,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
},
}, {
input: "sum by (foo) keeping_extra (some_metric)",
expected: &AggregateExpr{
Op: itemSum,
KeepExtraLabels: true,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
},
}, {
input: "sum (some_metric) by (foo,bar) keeping_extra",
expected: &AggregateExpr{
Op: itemSum,
KeepExtraLabels: true,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo", "bar"},
},
}, {
input: "avg by (foo)(some_metric)",
expected: &AggregateExpr{
Op: itemAvg,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
},
}, {
input: "COUNT by (foo) keeping_extra (some_metric)",
expected: &AggregateExpr{
Op: itemCount,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
KeepExtraLabels: true,
},
}, {
input: "MIN (some_metric) by (foo) keeping_extra",
expected: &AggregateExpr{
Op: itemMin,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
KeepExtraLabels: true,
},
}, {
input: "max by (foo)(some_metric)",
expected: &AggregateExpr{
Op: itemMax,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
},
}, {
input: "stddev(some_metric)",
expected: &AggregateExpr{
Op: itemStddev,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
},
}, {
input: "stdvar by (foo)(some_metric)",
expected: &AggregateExpr{
Op: itemStdvar,
Expr: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
Grouping: clientmodel.LabelNames{"foo"},
},
}, {
input: `sum some_metric by (test)`, fail: true,
}, {
input: `sum (some_metric) by test`, fail: true,
}, {
input: `sum (some_metric) by ()`, fail: true,
}, {
input: `sum (some_metric) by test`, fail: true,
}, {
input: `some_metric[5m] OFFSET`, fail: true,
}, {
input: `sum () by (test)`, fail: true,
}, {
input: "MIN keeping_extra (some_metric) by (foo)", fail: true,
}, {
input: "MIN by(test) (some_metric) keeping_extra", fail: true,
},
// Test function calls.
{
input: "time()",
expected: &Call{
Func: mustGetFunction("time"),
},
}, {
input: `floor(some_metric{foo!="bar"})`,
expected: &Call{
Func: mustGetFunction("floor"),
Args: Expressions{
&VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.NotEqual, Name: "foo", Value: "bar"},
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
},
},
}, {
input: "rate(some_metric[5m])",
expected: &Call{
Func: mustGetFunction("rate"),
Args: Expressions{
&MatrixSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
Range: 5 * time.Minute,
},
},
},
}, {
input: "round(some_metric)",
expected: &Call{
Func: mustGetFunction("round"),
Args: Expressions{
&VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
},
},
}, {
input: "round(some_metric, 5)",
expected: &Call{
Func: mustGetFunction("round"),
Args: Expressions{
&VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
&NumberLiteral{5},
},
},
}, {
input: "floor()", fail: true,
}, {
input: "floor(some_metric, other_metric)", fail: true,
}, {
input: "floor(1)", fail: true,
}, {
input: "non_existant_function_far_bar()", fail: true,
}, {
input: "rate(some_metric)", fail: true,
},
}
func TestParseExpressions(t *testing.T) {
for _, test := range testExpr {
parser := newParser("test", test.input)
expr, err := parser.parseExpr()
if !test.fail && err != nil {
t.Errorf("error in input '%s'", test.input)
t.Fatalf("could not parse: %s", err)
}
if test.fail && err != nil {
continue
}
err = parser.typecheck(expr)
if !test.fail && err != nil {
t.Errorf("error on input '%s'", test.input)
t.Fatalf("typecheck failed: %s", err)
}
if test.fail {
if err != nil {
continue
}
t.Errorf("error on input '%s'", test.input)
t.Fatalf("failure expected, but passed with result: %q", expr)
}
if !reflect.DeepEqual(expr, test.expected) {
t.Errorf("error on input '%s'", test.input)
t.Fatalf("no match\n\nexpected:\n%s\ngot: \n%s\n", Tree(test.expected), Tree(expr))
}
}
}
// NaN has no equality. Thus, we need a separate test for it.
func TestNaNExpression(t *testing.T) {
parser := newParser("test", "NaN")
expr, err := parser.parseExpr()
if err != nil {
t.Errorf("error on input 'NaN'")
t.Fatalf("coud not parse: %s", err)
}
nl, ok := expr.(*NumberLiteral)
if !ok {
t.Errorf("error on input 'NaN'")
t.Fatalf("expected number literal but got %T", expr)
}
if !math.IsNaN(float64(nl.Val)) {
t.Errorf("error on input 'NaN'")
t.Fatalf("expected 'NaN' in number literal but got %d", nl.Val)
}
}
var testStatement = []struct {
input string
expected Statements
fail bool
}{
{
// Test a file-like input.
input: `
# A simple test recording rule.
dc:http_request:rate5m = sum(rate(http_request_count[5m])) by (dc)
# A simple test alerting rule.
ALERT GlobalRequestRateLow IF(dc:http_request:rate5m < 10000) FOR 5m WITH {
service = "testservice"
# ... more fields here ...
}
SUMMARY "Global request rate low"
DESCRIPTION "The global request rate is low"
foo = bar{label1="value1"}
ALERT BazAlert IF foo > 10 WITH {}
SUMMARY "Baz"
DESCRIPTION "BazAlert"
`,
expected: Statements{
&RecordStmt{
Name: "dc:http_request:rate5m",
Expr: &AggregateExpr{
Op: itemSum,
Grouping: clientmodel.LabelNames{"dc"},
Expr: &Call{
Func: mustGetFunction("rate"),
Args: Expressions{
&MatrixSelector{
Name: "http_request_count",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "http_request_count"},
},
Range: 5 * time.Minute,
},
},
},
},
Labels: nil,
},
&AlertStmt{
Name: "GlobalRequestRateLow",
Expr: &ParenExpr{&BinaryExpr{
Op: itemLSS,
LHS: &VectorSelector{
Name: "dc:http_request:rate5m",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "dc:http_request:rate5m"},
},
},
RHS: &NumberLiteral{10000},
}},
Labels: clientmodel.LabelSet{"service": "testservice"},
Duration: 5 * time.Minute,
Summary: "Global request rate low",
Description: "The global request rate is low",
},
&RecordStmt{
Name: "foo",
Expr: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: "label1", Value: "value1"},
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
Labels: nil,
},
&AlertStmt{
Name: "BazAlert",
Expr: &BinaryExpr{
Op: itemGTR,
LHS: &VectorSelector{
Name: "foo",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "foo"},
},
},
RHS: &NumberLiteral{10},
},
Labels: clientmodel.LabelSet{},
Summary: "Baz",
Description: "BazAlert",
},
},
}, {
input: `foo{x="", a="z"} = bar{a="b", x=~"y"}`,
expected: Statements{
&RecordStmt{
Name: "foo",
Expr: &VectorSelector{
Name: "bar",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: "a", Value: "b"},
mustLabelMatcher(metric.RegexMatch, "x", "y"),
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "bar"},
},
},
Labels: clientmodel.LabelSet{"x": "", "a": "z"},
},
},
}, {
input: `ALERT SomeName IF some_metric > 1
SUMMARY "Global request rate low"
DESCRIPTION "The global request rate is low"
`,
expected: Statements{
&AlertStmt{
Name: "SomeName",
Expr: &BinaryExpr{
Op: itemGTR,
LHS: &VectorSelector{
Name: "some_metric",
LabelMatchers: metric.LabelMatchers{
{Type: metric.Equal, Name: clientmodel.MetricNameLabel, Value: "some_metric"},
},
},
RHS: &NumberLiteral{1},
},
Labels: clientmodel.LabelSet{},
Summary: "Global request rate low",
Description: "The global request rate is low",
},
},
}, {
input: `
# A simple test alerting rule.
ALERT GlobalRequestRateLow IF(dc:http_request:rate5m < 10000) FOR 5 WITH {
service = "testservice"
# ... more fields here ...
}
SUMMARY "Global request rate low"
DESCRIPTION "The global request rate is low"
`,
fail: true,
}, {
input: "",
expected: Statements{},
}, {
input: "foo = time()",
fail: true,
}, {
input: "foo = 1",
fail: true,
}, {
input: "foo = bar[5m]",
fail: true,
}, {
input: `foo = "test"`,
fail: true,
}, {
input: `foo = `,
fail: true,
}, {
input: `foo{a!="b"} = bar`,
fail: true,
}, {
input: `foo{a=~"b"} = bar`,
fail: true,
}, {
input: `foo{a!~"b"} = bar`,
fail: true,
}, {
input: `ALERT SomeName IF time() WITH {}
SUMMARY "Global request rate low"
DESCRIPTION "The global request rate is low"
`,
fail: true,
}, {
input: `ALERT SomeName IF some_metric > 1 WITH {}
SUMMARY "Global request rate low"
`,
fail: true,
}, {
input: `ALERT SomeName IF some_metric > 1
DESCRIPTION "The global request rate is low"
`,
fail: true,
},
}
func TestParseStatements(t *testing.T) {
for _, test := range testStatement {
parser := newParser("test", test.input)
stmts, err := parser.parseStmts()
if !test.fail && err != nil {
t.Errorf("error in input: \n\n%s\n", test.input)
t.Fatalf("could not parse: %s", err)
}
if test.fail && err != nil {
continue
}
err = parser.typecheck(stmts)
if !test.fail && err != nil {
t.Errorf("error in input: \n\n%s\n", test.input)
t.Fatalf("typecheck failed: %s", err)
}
if test.fail {
if err != nil {
continue
}
t.Errorf("error in input: \n\n%s\n", test.input)
t.Fatalf("failure expected, but passed")
}
if !reflect.DeepEqual(stmts, test.expected) {
t.Errorf("error in input: \n\n%s\n", test.input)
t.Fatalf("no match\n\nexpected:\n%s\ngot: \n%s\n", Tree(test.expected), Tree(stmts))
}
}
}
func mustLabelMatcher(mt metric.MatchType, name clientmodel.LabelName, val clientmodel.LabelValue) *metric.LabelMatcher {
m, err := metric.NewLabelMatcher(mt, name, val)
if err != nil {
panic(err)
}
return m
}
func mustGetFunction(name string) *Function {
f, ok := getFunction(name)
if !ok {
panic(fmt.Errorf("function %q does not exist", name))
}
return f
}