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|
package flamegraph
import (
"encoding/json"
"fmt"
"os"
"os/exec"
"strings"
"testing"
)
type jsFrame struct {
Name string `json:"name"`
X float64 `json:"x"`
Y float64 `json:"y"`
W float64 `json:"w"`
H float64 `json:"h"`
Depth int `json:"depth"`
}
type liveJSResult struct {
Colors map[string]string `json:"colors"`
KnownFrames []jsFrame `json:"knownFrames"`
SVGHTML string `json:"svgHTML"`
ViewBox string `json:"viewBox"`
SingleCount int `json:"singleCount"`
DeepMaxDepth int `json:"deepMaxDepth"`
WideFrameCount int `json:"wideFrameCount"`
}
func TestLiveHTMLJSRenderingParity(t *testing.T) {
if _, err := exec.LookPath("node"); err != nil {
t.Skip("node not available")
}
out := runLiveHTMLJSHarness(t)
var got liveJSResult
if err := json.Unmarshal([]byte(out), &got); err != nil {
t.Fatalf("unmarshal node output: %v\nraw:\n%s", err, out)
}
names := []string{"read", "write", "io_uring_enter", "nested/path"}
for _, name := range names {
want := frameColor(name)
if got.Colors[name] != want {
t.Fatalf("fgFrameColor(%q) = %q, want %q", name, got.Colors[name], want)
}
}
if len(got.KnownFrames) != 3 {
t.Fatalf("known frame count = %d, want 3", len(got.KnownFrames))
}
assertFrame(t, got.KnownFrames[0], "A", 0, 96, 720, 15, 1)
assertFrame(t, got.KnownFrames[1], "A1", 0, 80, 720, 15, 2)
assertFrame(t, got.KnownFrames[2], "B", 720, 96, 480, 15, 1)
if !strings.Contains(got.SVGHTML, `<g class="frame"`) {
t.Fatalf("svg markup missing frame group")
}
if !strings.Contains(got.SVGHTML, `data-name="A"`) {
t.Fatalf("svg markup missing data-name for A")
}
if !strings.Contains(got.SVGHTML, `data-x="0.000"`) {
t.Fatalf("svg markup missing data-x")
}
if !strings.Contains(got.SVGHTML, `data-w="720.000"`) {
t.Fatalf("svg markup missing data-w")
}
if !strings.Contains(got.SVGHTML, `data-depth="1"`) {
t.Fatalf("svg markup missing data-depth")
}
if !strings.Contains(got.SVGHTML, `data-base-fill="rgb(`) {
t.Fatalf("svg markup missing data-base-fill")
}
if got.ViewBox != "0 0 1200 128" {
t.Fatalf("viewBox = %q, want %q", got.ViewBox, "0 0 1200 128")
}
if got.SingleCount != 1 {
t.Fatalf("single-frame case count = %d, want 1", got.SingleCount)
}
if got.DeepMaxDepth < 50 {
t.Fatalf("deep max depth = %d, want at least 50", got.DeepMaxDepth)
}
if got.WideFrameCount != 1000 {
t.Fatalf("wide frame count = %d, want 1000", got.WideFrameCount)
}
}
func assertFrame(t *testing.T, got jsFrame, name string, x, y, w, h float64, depth int) {
t.Helper()
if got.Name != name {
t.Fatalf("frame name = %q, want %q", got.Name, name)
}
if got.Depth != depth {
t.Fatalf("frame %q depth = %d, want %d", got.Name, got.Depth, depth)
}
const eps = 0.001
if diff(got.X, x) > eps || diff(got.Y, y) > eps || diff(got.W, w) > eps || diff(got.H, h) > eps {
t.Fatalf("frame %q geometry = {x:%f y:%f w:%f h:%f}, want {x:%f y:%f w:%f h:%f}",
got.Name, got.X, got.Y, got.W, got.H, x, y, w, h)
}
}
func diff(a, b float64) float64 {
if a > b {
return a - b
}
return b - a
}
func runLiveHTMLJSHarness(t *testing.T) string {
t.Helper()
script := extractLiveHTMLScript(t)
harness := fmt.Sprintf(`
const vm = require("vm");
const liveScript = %q;
function makeElement(id) {
return {
id,
textContent: "",
innerHTML: "",
style: {},
dataset: {},
attrs: {},
classList: { toggle: function(){}, add: function(){}, remove: function(){} },
addEventListener: function(){},
setAttribute: function(k, v) { this.attrs[k] = String(v); },
getAttribute: function(k) { return this.attrs[k] || ""; },
querySelectorAll: function() { return []; },
querySelector: function() { return null; }
};
}
const elements = {};
["flamegraph", "status", "btn-pause", "btn-search", "btn-reset-search", "btn-undo-zoom", "btn-reset-zoom"].forEach((id) => {
elements[id] = makeElement(id);
});
elements["body"] = makeElement("body");
global.document = {
body: elements["body"],
getElementById: function(id) {
if (!elements[id]) elements[id] = makeElement(id);
return elements[id];
},
addEventListener: function(){},
};
global.window = global;
global.prompt = function(){ return ""; };
global.requestAnimationFrame = function(cb){ cb(); };
global.EventSource = function() {
this.onmessage = null;
this.onerror = null;
};
window.addEventListener = function(){};
vm.runInThisContext(liveScript);
const names = ["read", "write", "io_uring_enter", "nested/path"];
const colors = {};
for (const n of names) {
colors[n] = fgFrameColor(n);
}
const knownTree = {
n: "",
v: 0,
t: 10,
c: [
{ n: "A", v: 0, t: 6, c: [{ n: "A1", v: 6, t: 6 }] },
{ n: "B", v: 4, t: 4 }
]
};
const maxDepth = fgMaxDepth(knownTree, 0);
const canvasHeight = (liveFlamegraphState.cfg.frameHeight * (maxDepth + 1)) + 80;
const knownFramesRaw = [];
fgBuildFrames(knownTree, knownTree.t, 0, 0, canvasHeight, true, knownFramesRaw, "");
const knownFrames = knownFramesRaw.map((f) => ({
name: f.name,
x: Number(f.x.toFixed(3)),
y: Number(f.y.toFixed(3)),
w: Number(f.w.toFixed(3)),
h: Number(f.h.toFixed(3)),
depth: f.depth,
}));
fgRender(knownTree);
const svgHTML = elements["flamegraph"].innerHTML;
const viewBox = elements["flamegraph"].attrs["viewBox"] || "";
const singleTree = { n: "", v: 0, t: 1, c: [{ n: "only", v: 1, t: 1 }] };
const singleFrames = [];
const singleCanvas = (liveFlamegraphState.cfg.frameHeight * (fgMaxDepth(singleTree, 0) + 1)) + 80;
fgBuildFrames(singleTree, singleTree.t, 0, 0, singleCanvas, true, singleFrames, "");
let deepTree = { n: "", v: 0, t: 1, c: [] };
let cursor = deepTree;
for (let i = 0; i < 55; i++) {
const child = { n: "d" + i, v: i === 54 ? 1 : 0, t: 1, c: [] };
cursor.c = [child];
cursor = child;
}
const deepMaxDepth = fgMaxDepth(deepTree, 0);
const wideChildren = [];
for (let i = 0; i < 1000; i++) {
wideChildren.push({ n: "w" + i, v: 1, t: 1 });
}
const wideTree = { n: "", v: 0, t: 1000, c: wideChildren };
const wideCanvas = (liveFlamegraphState.cfg.frameHeight * (fgMaxDepth(wideTree, 0) + 1)) + 80;
const wideFrames = [];
fgBuildFrames(wideTree, wideTree.t, 0, 0, wideCanvas, true, wideFrames, "");
console.log(JSON.stringify({
colors,
knownFrames,
svgHTML,
viewBox,
singleCount: singleFrames.length,
deepMaxDepth,
wideFrameCount: wideFrames.length,
}));
`, script)
tmp, err := os.CreateTemp("", "livehtml-js-*.cjs")
if err != nil {
t.Fatalf("create temp script: %v", err)
}
defer os.Remove(tmp.Name())
if _, err := tmp.WriteString(harness); err != nil {
_ = tmp.Close()
t.Fatalf("write temp script: %v", err)
}
if err := tmp.Close(); err != nil {
t.Fatalf("close temp script: %v", err)
}
out, err := exec.Command("node", tmp.Name()).CombinedOutput()
if err != nil {
t.Fatalf("node harness failed: %v\n%s", err, string(out))
}
return strings.TrimSpace(string(out))
}
func extractLiveHTMLScript(t *testing.T) string {
t.Helper()
const openTag = "<script>"
const closeTag = "</script>"
start := strings.Index(liveHTML, openTag)
if start < 0 {
t.Fatalf("script tag not found in liveHTML")
}
start += len(openTag)
end := strings.Index(liveHTML[start:], closeTag)
if end < 0 {
t.Fatalf("closing script tag not found in liveHTML")
}
return strings.TrimSpace(liveHTML[start : start+end])
}
|
