75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
package sparkline
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import (
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"os"
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"path/filepath"
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"strings"
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"testing"
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"time"
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)
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func loadGolden(t *testing.T, name string) string {
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t.Helper()
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b, err := os.ReadFile(filepath.Join("testdata", name))
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if err != nil {
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t.Fatalf("read golden %s: %v", name, err)
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}
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return strings.TrimRight(string(b), "\n")
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}
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func TestSparkline_Empty(t *testing.T) {
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got := strings.TrimRight(string(RenderSparkline(nil, 80, 20)), "\n")
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want := loadGolden(t, "empty.svg")
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if got != want {
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t.Errorf("empty sparkline mismatch:\nwant:\n%s\ngot:\n%s", want, got)
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}
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}
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func TestSparkline_SinglePoint(t *testing.T) {
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got := strings.TrimRight(string(RenderSparkline([]float64{100}, 80, 20)), "\n")
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want := loadGolden(t, "single_point.svg")
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if got != want {
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t.Errorf("single_point sparkline mismatch:\nwant:\n%s\ngot:\n%s", want, got)
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}
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}
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func TestSparkline_ThreePoints(t *testing.T) {
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got := strings.TrimRight(string(RenderSparkline([]float64{10, 30, 20}, 80, 20)), "\n")
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want := loadGolden(t, "three_points.svg")
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if got != want {
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t.Errorf("three_points sparkline mismatch:\nwant:\n%s\ngot:\n%s", want, got)
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}
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}
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func TestChart_Empty(t *testing.T) {
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got := strings.TrimRight(string(RenderChart(nil, nil, ChartOpts{Width: 600, Height: 220})), "\n")
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want := loadGolden(t, "chart_empty.svg")
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if got != want {
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t.Errorf("empty chart mismatch:\nwant:\n%s\ngot:\n%s", want, got)
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}
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}
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func TestChart_TwoSeries(t *testing.T) {
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days := []time.Time{
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time.Date(2026, 5, 1, 0, 0, 0, 0, time.UTC),
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time.Date(2026, 5, 2, 0, 0, 0, 0, time.UTC),
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time.Date(2026, 5, 3, 0, 0, 0, 0, time.UTC),
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time.Date(2026, 5, 4, 0, 0, 0, 0, time.UTC),
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}
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series := []Series{
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{
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Name: "size", Stroke: "#3b82f6", Axis: AxisLeft, Format: FormatBytes,
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Points: []float64{1024, 2048, 4096, 8192},
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},
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{
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Name: "snapshots", Stroke: "#f59e0b", Axis: AxisRight, Format: FormatCount,
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Points: []float64{1, 2, 3, 4},
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},
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}
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got := strings.TrimRight(string(RenderChart(series, days, ChartOpts{Width: 600, Height: 220})), "\n")
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want := loadGolden(t, "chart_two_series.svg")
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if got != want {
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t.Errorf("two_series chart mismatch:\nwant:\n%s\ngot:\n%s", want, got)
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}
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}
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