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|
package parser
import (
"context"
"strings"
"testing"
"time"
)
func TestJSONParser_Parse(t *testing.T) {
tests := []struct {
name string
input string
wantCount int
wantErr bool
}{
{
name: "valid single sample",
input: `[
{
"metric": "test_metric",
"labels": {"env": "prod", "host": "server1"},
"value": 42.5,
"timestamp_ms": 1234567890000
}
]`,
wantCount: 1,
wantErr: false,
},
{
name: "multiple samples",
input: `[
{"metric": "metric1", "labels": {"env": "prod"}, "value": 100, "timestamp_ms": 1234567890000},
{"metric": "metric2", "labels": {"env": "test"}, "value": 200, "timestamp_ms": 1234567891000},
{"metric": "metric3", "labels": {"env": "dev"}, "value": 300, "timestamp_ms": 1234567892000}
]`,
wantCount: 3,
wantErr: false,
},
{
name: "no timestamp defaults to now",
input: `[
{"metric": "test_metric", "labels": {"env": "prod"}, "value": 100}
]`,
wantCount: 1,
wantErr: false,
},
{
name: "no labels",
input: `[
{"metric": "test_metric", "value": 100, "timestamp_ms": 1234567890000}
]`,
wantCount: 1,
wantErr: false,
},
{
name: "empty metric skipped",
input: `[
{"metric": "", "labels": {"env": "prod"}, "value": 100},
{"metric": "valid_metric", "labels": {"env": "test"}, "value": 200}
]`,
wantCount: 1,
wantErr: false,
},
{
name: "empty array",
input: `[]`,
wantCount: 0,
wantErr: false,
},
{
name: "invalid json",
input: `{not valid json}`,
wantCount: 0,
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
parser := NewJSONParser()
reader := strings.NewReader(tt.input)
ctx := context.Background()
samples, err := parser.Parse(ctx, reader)
if (err != nil) != tt.wantErr {
t.Errorf("Parse() error = %v, wantErr %v", err, tt.wantErr)
return
}
if len(samples) != tt.wantCount {
t.Errorf("Parse() returned %d samples, want %d", len(samples), tt.wantCount)
}
})
}
}
func TestJSONParser_ParseWithContext(t *testing.T) {
t.Run("context check during parse", func(t *testing.T) {
parser := NewJSONParser()
ctx, cancel := context.WithCancel(context.Background())
// Create valid input with empty metrics that will be filtered
input := `[
{"metric": "", "value": 1},
{"metric": "", "value": 2},
{"metric": "", "value": 3}
]`
cancel() // Cancel before parsing
reader := strings.NewReader(input)
_, err := parser.Parse(ctx, reader)
// Context cancellation should be detected during sample processing
if err != context.Canceled {
// Note: JSON decoder may finish before context is checked
// This test verifies context support exists, but timing is not guaranteed
t.Logf("Got error: %v (context may not be checked until after JSON decode)", err)
}
})
}
func TestJSONParser_ParseTimestamp(t *testing.T) {
parser := NewJSONParser()
input := `[{"metric": "test_metric", "value": 100, "timestamp_ms": 1234567890000}]`
reader := strings.NewReader(input)
ctx := context.Background()
samples, err := parser.Parse(ctx, reader)
if err != nil {
t.Fatalf("Parse() error = %v", err)
}
if len(samples) != 1 {
t.Fatalf("Expected 1 sample, got %d", len(samples))
}
expectedTime := time.UnixMilli(1234567890000)
if !samples[0].Timestamp.Equal(expectedTime) {
t.Errorf("Timestamp = %v, want %v", samples[0].Timestamp, expectedTime)
}
}
func TestJSONParser_ParseLabels(t *testing.T) {
parser := NewJSONParser()
input := `[{
"metric": "test_metric",
"labels": {"env": "prod", "host": "server1", "region": "us-west"},
"value": 100
}]`
reader := strings.NewReader(input)
ctx := context.Background()
samples, err := parser.Parse(ctx, reader)
if err != nil {
t.Fatalf("Parse() error = %v", err)
}
if len(samples) != 1 {
t.Fatalf("Expected 1 sample, got %d", len(samples))
}
expectedLabels := map[string]string{
"env": "prod",
"host": "server1",
"region": "us-west",
}
if len(samples[0].Labels) != len(expectedLabels) {
t.Errorf("Got %d labels, want %d", len(samples[0].Labels), len(expectedLabels))
}
for k, v := range expectedLabels {
if samples[0].Labels[k] != v {
t.Errorf("Label[%s] = %v, want %v", k, samples[0].Labels[k], v)
}
}
}
|
