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package flamegraph
import (
"math"
"testing"
)
func almostEqual(a, b float64) bool {
return math.Abs(a-b) < 1e-6
}
func TestBuildFrameLayoutBasicGeometry(t *testing.T) {
tr := newTrie()
tr.add([]string{"A"}, 4)
tr.add([]string{"B"}, 1)
tr.computeTotals()
cfg := defaultSVGConfig()
cfg.Width = 100
cfg.FrameHeight = 10
cfg.FontSize = 10
cfg.MinWidthPx = 1
frames := BuildFrameLayout(tr, cfg)
if len(frames) != 2 {
t.Fatalf("frames len = %d, want 2", len(frames))
}
a := frames[0]
if a.Name != "A" {
t.Fatalf("first frame name = %q, want %q", a.Name, "A")
}
if !almostEqual(a.X, 0) {
t.Fatalf("A x = %f, want 0", a.X)
}
if !almostEqual(a.Width, 80) {
t.Fatalf("A width = %f, want 80", a.Width)
}
if !almostEqual(a.Percent, 80) {
t.Fatalf("A percent = %f, want 80", a.Percent)
}
if a.Depth != 1 {
t.Fatalf("A depth = %d, want 1", a.Depth)
}
b := frames[1]
if b.Name != "B" {
t.Fatalf("second frame name = %q, want %q", b.Name, "B")
}
if !almostEqual(b.X, 80) {
t.Fatalf("B x = %f, want 80", b.X)
}
if !almostEqual(b.Width, 20) {
t.Fatalf("B width = %f, want 20", b.Width)
}
}
func TestBuildFrameLayoutSkipsFramesBelowMinWidth(t *testing.T) {
tr := newTrie()
tr.add([]string{"A"}, 999)
tr.add([]string{"B"}, 1)
tr.computeTotals()
cfg := defaultSVGConfig()
cfg.Width = 100
cfg.FrameHeight = 10
cfg.FontSize = 10
cfg.MinWidthPx = 1
frames := BuildFrameLayout(tr, cfg)
if len(frames) != 1 {
t.Fatalf("frames len = %d, want 1", len(frames))
}
if frames[0].Name != "A" {
t.Fatalf("remaining frame name = %q, want %q", frames[0].Name, "A")
}
}
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