Simplify cache, calculate with expr

internal/metricAggregator/metricAggregatorExpr_test.go

@@ -0,0 +1,97 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved. This file is part of cc-lib.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+// additional authors:
+// Holger Obermaier (NHR@KIT)
+
+package metricAggregator
+
+import (
+	"math"
+	"testing"
+	"time"
+
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
+)
+
+func GenMetricNoCheck(value any, tags, meta map[string]string) lp.CCMessage {
+	msg, _ := lp.NewMetric("test", tags, meta, value, time.Now())
+	return msg
+}
+
+type TestBoolConfig struct {
+	msg             lp.CCMessage
+	cond            string
+	expected_result bool
+	should_fail     bool
+}
+
+var testBoolConfig []TestBoolConfig = []TestBoolConfig{
+	{
+		msg:             GenMetricNoCheck(1.0, nil, nil),
+		cond:            "fields.value == 1",
+		expected_result: true,
+		should_fail:     false,
+	},
+	{
+		msg:             GenMetricNoCheck(1.0, map[string]string{"hostname": "testhost"}, nil),
+		cond:            "tags.hostname == 'testhost'",
+		expected_result: true,
+		should_fail:     false,
+	},
+}
+
+func TestEvalBoolConditionExprSimple(t *testing.T) {
+
+	for _, test := range testBoolConfig {
+		res, err := EvalBoolConditionExpr(test.cond, test.msg)
+		if err != nil && !test.should_fail {
+			t.Error(err.Error())
+			return
+		}
+		if !test.should_fail && res != test.expected_result {
+			t.Errorf("Condition '%s' evaluated to %v despite expecting %v", test.cond, res, test.expected_result)
+			return
+		}
+	}
+}
+
+type TestFloat64Config struct {
+	msg             lp.CCMessage
+	cond            string
+	expected_result float64
+	should_fail     bool
+}
+
+var testFloat64Config []TestFloat64Config = []TestFloat64Config{
+	{
+		msg:             GenMetricNoCheck(1.0, nil, nil),
+		cond:            "fields.value + 3.14",
+		expected_result: 4.14,
+		should_fail:     false,
+	},
+	{
+		msg:             GenMetricNoCheck(2.0, nil, nil),
+		cond:            "fields.value * 2",
+		expected_result: 4.0,
+		should_fail:     false,
+	},
+}
+
+const compareFloat64Max = 1e-9
+
+func TestEvalFloat64ConditionExprSimple(t *testing.T) {
+
+	for _, test := range testFloat64Config {
+		res, err := EvalFloat64ConditionExpr(test.cond, test.msg)
+		if err != nil && !test.should_fail {
+			t.Error(err.Error())
+			return
+		}
+		if !test.should_fail && math.Abs(res-test.expected_result) > compareFloat64Max {
+			t.Errorf("Condition '%s' evaluated to %f despite expecting %f", test.cond, res, test.expected_result)
+			return
+		}
+	}
+}