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package dashboard
import (
"strings"
"testing"
)
func TestRenderSparklineEmptyOrInvalidWidth(t *testing.T) {
if got := renderSparkline(nil, 5); got != "" {
t.Fatalf("expected empty sparkline for nil data, got %q", got)
}
if got := renderSparkline([]float64{1, 2, 3}, 0); got != "" {
t.Fatalf("expected empty sparkline for width 0, got %q", got)
}
}
func TestRenderSparklineSingleValue(t *testing.T) {
got := renderSparkline([]float64{10}, 8)
if got != "▄" {
t.Fatalf("expected single mid-bar rune, got %q", got)
}
}
func TestRenderSparklineAllEqualValues(t *testing.T) {
got := renderSparkline([]float64{5, 5, 5, 5}, 4)
if got != "▄▄▄▄" {
t.Fatalf("expected flat sparkline, got %q", got)
}
}
func TestRenderSparklineRespectsWidthTruncation(t *testing.T) {
got := renderSparkline([]float64{1, 2, 3, 4, 5, 6, 7, 8}, 4)
if len([]rune(got)) != 4 {
t.Fatalf("expected 4 runes, got %q", got)
}
}
func TestRenderSparklineSpansLowToHigh(t *testing.T) {
got := renderSparkline([]float64{0, 10}, 2)
if !strings.Contains(got, "▁") || !strings.Contains(got, "█") {
t.Fatalf("expected low/high bars, got %q", got)
}
}
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