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|
package parser
import (
"context"
"strings"
"testing"
"time"
)
func TestCSVParser_Parse(t *testing.T) {
tests := []struct {
name string
input string
wantCount int
wantErr bool
}{
{
name: "valid single line",
input: `test_metric,env=prod;host=server1,42.5,1234567890000`,
wantCount: 1,
wantErr: false,
},
{
name: "multiple lines",
input: `metric1,label1=value1,100,1234567890000
metric2,label2=value2,200,1234567891000
metric3,label3=value3,300,1234567892000`,
wantCount: 3,
wantErr: false,
},
{
name: "with comments",
input: `# This is a comment
metric1,env=test,50,1234567890000
# Another comment
metric2,env=prod,75,1234567891000`,
wantCount: 2,
wantErr: false,
},
{
name: "no timestamp defaults to now",
input: `metric1,env=test,100`,
wantCount: 1,
wantErr: false,
},
{
name: "no labels",
input: `metric1,,100,1234567890000`,
wantCount: 1,
wantErr: false,
},
{
name: "empty input",
input: "",
wantCount: 0,
wantErr: false,
},
{
name: "invalid line causes error",
input: `metric1,env=test,100,1234567890000
invalid
metric2,env=prod,200,1234567891000`,
wantCount: 0,
wantErr: true,
},
{
name: "invalid value skipped",
input: `metric1,env=test,not_a_number,1234567890000
metric2,env=prod,200,1234567891000`,
wantCount: 1,
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
parser := NewCSVParser()
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 TestCSVParser_ParseLabels(t *testing.T) {
tests := []struct {
name string
input string
want map[string]string
}{
{
name: "single label",
input: "env=prod",
want: map[string]string{"env": "prod"},
},
{
name: "multiple labels",
input: "env=prod;host=server1;region=us-west",
want: map[string]string{"env": "prod", "host": "server1", "region": "us-west"},
},
{
name: "empty string",
input: "",
want: map[string]string{},
},
{
name: "invalid label format skipped",
input: "env=prod;invalid;host=server1",
want: map[string]string{"env": "prod", "host": "server1"},
},
{
name: "with spaces",
input: " env = prod ; host = server1 ",
want: map[string]string{"env": "prod", "host": "server1"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := parseLabels(tt.input)
if len(got) != len(tt.want) {
t.Errorf("parseLabels() returned %d labels, want %d", len(got), len(tt.want))
}
for k, v := range tt.want {
if got[k] != v {
t.Errorf("parseLabels()[%s] = %v, want %v", k, got[k], v)
}
}
})
}
}
func TestCSVParser_ParseWithContext(t *testing.T) {
t.Run("context cancellation", func(t *testing.T) {
parser := NewCSVParser()
ctx, cancel := context.WithCancel(context.Background())
cancel() // Cancel immediately
input := strings.NewReader(`metric1,env=test,100,1234567890000`)
_, err := parser.Parse(ctx, input)
if err != context.Canceled {
t.Errorf("Expected context.Canceled error, got %v", err)
}
})
}
func TestCSVParser_ParseTimestamp(t *testing.T) {
parser := NewCSVParser()
input := `metric1,env=test,100,1234567890000`
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)
}
}
|
