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|
package flamegraph
import (
"bytes"
"strings"
"testing"
)
func renderSVGForTest(t *testing.T, tr *trie, cfg SVGConfig) string {
t.Helper()
var buf bytes.Buffer
if err := WriteSVG(&buf, tr, cfg); err != nil {
t.Fatalf("WriteSVG failed: %v", err)
}
return buf.String()
}
func TestWriteSVGBasic(t *testing.T) {
tr := newTrie()
tr.add([]string{"a", "b"}, 3)
tr.add([]string{"a", "c"}, 2)
tr.computeTotals()
svg := renderSVGForTest(t, tr, defaultSVGConfig())
if !strings.Contains(svg, "<svg") || !strings.Contains(svg, "</svg>") {
t.Fatalf("expected valid svg wrapper, got: %s", svg)
}
if !strings.Contains(svg, "data-name=\"a\"") || !strings.Contains(svg, "data-name=\"b\"") {
t.Fatalf("expected rendered frame names, got: %s", svg)
}
}
func TestWriteSVGEmptyTrie(t *testing.T) {
tr := newTrie()
tr.computeTotals()
svg := renderSVGForTest(t, tr, defaultSVGConfig())
if !strings.Contains(svg, "<svg") || !strings.Contains(svg, "</svg>") {
t.Fatalf("expected valid svg wrapper, got: %s", svg)
}
if strings.Contains(svg, "class=\"frame\"") {
t.Fatalf("expected no rendered frames for empty trie, got: %s", svg)
}
}
func TestWriteSVGMinWidth(t *testing.T) {
tr := newTrie()
tr.add([]string{"wide"}, 100)
tr.add([]string{"tiny"}, 1)
tr.computeTotals()
cfg := defaultSVGConfig()
cfg.Width = 120
cfg.MinWidthPx = 2.0
svg := renderSVGForTest(t, tr, cfg)
if !strings.Contains(svg, "data-name=\"wide\"") {
t.Fatalf("expected wide frame to be rendered, got: %s", svg)
}
if strings.Contains(svg, "data-name=\"tiny\"") {
t.Fatalf("expected tiny frame to be skipped by min width, got: %s", svg)
}
}
func TestWriteSVGTitle(t *testing.T) {
tr := newTrie()
tr.add([]string{"a"}, 1)
tr.computeTotals()
cfg := defaultSVGConfig()
cfg.Title = "Custom Flamegraph"
svg := renderSVGForTest(t, tr, cfg)
if !strings.Contains(svg, "Custom Flamegraph") {
t.Fatalf("expected custom title in output, got: %s", svg)
}
}
func TestFrameColor(t *testing.T) {
colorA1 := frameColor("read")
colorA2 := frameColor("read")
colorB := frameColor("write")
if colorA1 != colorA2 {
t.Fatalf("expected deterministic color for identical names, got %q vs %q", colorA1, colorA2)
}
if !strings.HasPrefix(colorA1, "rgb(") || !strings.HasSuffix(colorA1, ")") {
t.Fatalf("expected rgb() format, got %q", colorA1)
}
if colorA1 == colorB {
t.Fatalf("expected different colors for different names, got %q", colorA1)
}
}
func TestWriteSVGInvalidConfigFallsBack(t *testing.T) {
tr := newTrie()
tr.add([]string{"a"}, 1)
tr.computeTotals()
cfg := SVGConfig{Title: "x", Width: 0, FrameHeight: 0, FontSize: 0, MinWidthPx: 0}
svg := renderSVGForTest(t, tr, cfg)
if !strings.Contains(svg, `width="100%"`) {
t.Fatalf("expected responsive svg width, got: %s", svg)
}
if !strings.Contains(svg, `viewBox="0 0 1200 `) {
t.Fatalf("expected fallback viewBox width, got: %s", svg)
}
if !strings.Contains(svg, "I/O Flame Graph") {
t.Fatalf("expected fallback title, got: %s", svg)
}
}
|
