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diff --git a/dom/heapsnapshot/tests/unit/test_census-tree-node-06.js b/dom/heapsnapshot/tests/unit/test_census-tree-node-06.js
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+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test inverting CensusTreeNode with a by alloaction stack breakdown.
+ */
+
+function run_test() {
+ const BREAKDOWN = {
+ by: "allocationStack",
+ then: { by: "count", count: true, bytes: true },
+ noStack: { by: "count", count: true, bytes: true },
+ };
+
+ let stack1, stack2, stack3, stack4;
+
+ function a(n) {
+ return b(n);
+ }
+ function b(n) {
+ return c(n);
+ }
+ function c(n) {
+ return saveStack(n);
+ }
+ function d(n) {
+ return b(n);
+ }
+ function e(n) {
+ return c(n);
+ }
+
+ const abc_Stack = a(3);
+ const bc_Stack = b(2);
+ const c_Stack = c(1);
+ const dbc_Stack = d(3);
+ const ec_Stack = e(2);
+
+ const REPORT = new Map([
+ [abc_Stack, { bytes: 10, count: 1 }],
+ [ bc_Stack, { bytes: 10, count: 1 }],
+ [ c_Stack, { bytes: 10, count: 1 }],
+ [dbc_Stack, { bytes: 10, count: 1 }],
+ [ ec_Stack, { bytes: 10, count: 1 }],
+ ["noStack", { bytes: 50, count: 5 }],
+ ]);
+
+ const EXPECTED = {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: [
+ {
+ name: "noStack",
+ bytes: 50,
+ totalBytes: 50,
+ count: 5,
+ totalCount: 5,
+ children: [
+ {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: undefined,
+ id: 16,
+ parent: 15,
+ reportLeafIndex: undefined,
+ }
+ ],
+ id: 15,
+ parent: 14,
+ reportLeafIndex: 6,
+ },
+ {
+ name: abc_Stack,
+ bytes: 50,
+ totalBytes: 10,
+ count: 5,
+ totalCount: 1,
+ children: [
+ {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: undefined,
+ id: 18,
+ parent: 17,
+ reportLeafIndex: undefined,
+ },
+ {
+ name: abc_Stack.parent,
+ bytes: 0,
+ totalBytes: 10,
+ count: 0,
+ totalCount: 1,
+ children: [
+ {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: undefined,
+ id: 22,
+ parent: 19,
+ reportLeafIndex: undefined,
+ },
+ {
+ name: abc_Stack.parent.parent,
+ bytes: 0,
+ totalBytes: 10,
+ count: 0,
+ totalCount: 1,
+ children: [
+ {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: undefined,
+ id: 21,
+ parent: 20,
+ reportLeafIndex: undefined,
+ }
+ ],
+ id: 20,
+ parent: 19,
+ reportLeafIndex: undefined,
+ },
+ {
+ name: dbc_Stack.parent.parent,
+ bytes: 0,
+ totalBytes: 10,
+ count: 0,
+ totalCount: 1,
+ children: [
+ {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: undefined,
+ id: 24,
+ parent: 23,
+ reportLeafIndex: undefined,
+ }
+ ],
+ id: 23,
+ parent: 19,
+ reportLeafIndex: undefined,
+ }
+ ],
+ id: 19,
+ parent: 17,
+ reportLeafIndex: undefined,
+ },
+ {
+ name: ec_Stack.parent,
+ bytes: 0,
+ totalBytes: 10,
+ count: 0,
+ totalCount: 1,
+ children: [
+ {
+ name: null,
+ bytes: 0,
+ totalBytes: 100,
+ count: 0,
+ totalCount: 10,
+ children: undefined,
+ id: 26,
+ parent: 25,
+ reportLeafIndex: undefined,
+ },
+ ],
+ id: 25,
+ parent: 17,
+ reportLeafIndex: undefined,
+ },
+ ],
+ id: 17,
+ parent: 14,
+ reportLeafIndex: new Set([1, 2, 3, 4, 5]),
+ }
+ ],
+ id: 14,
+ parent: undefined,
+ reportLeafIndex: undefined,
+ };
+
+ compareCensusViewData(BREAKDOWN, REPORT, EXPECTED, { invert: true });
+}