files core monitortests diskprocesssamplertests swift d9898dd0

File: Core-MonitorTests/DiskProcessSamplerTests.swift

Current Role

• Area: Tests.
• This page records the file's current repository role, source metadata, and recent commit history.
• Review nearby tests and commit pages before changing this file.

Metadata

Field	Value
Source path	Core-MonitorTests/DiskProcessSamplerTests.swift
Wiki area	Tests
Exists in current checkout	True
Size	2706 bytes
Binary	False
Line count	66
Extension	.swift

Imports

XCTest

Declarations

Kind	Name	Line
class	DiskProcessSamplerTests	2
func	testActivitiesAggregateDeltasByProcessName	5
func	testActivitiesClampCounterResetsAndRespectLimit	33
func	testFormatBytesUsesCompactLabels	58

Recent Change History

Commit	Date	Subject
3094642	2026-04-16	Cache disk activity away from menu bar renders

Maintenance Notes

• Prefer focused changes that respect the ownership described above.
• If this file touches helper trust, SMC writes, startup, or permissions, update the relevant support docs and tests.
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Source Excerpt

import XCTest
@testable import Core_Monitor

final class DiskProcessSamplerTests: XCTestCase {
    func testActivitiesAggregateDeltasByProcessName() {
        let previousCounters: [Int32: DiskProcessCounter] = [
            11: DiskProcessCounter(pid: 11, name: "Safari", readBytes: 100, writtenBytes: 50),
            12: DiskProcessCounter(pid: 12, name: "Safari", readBytes: 400, writtenBytes: 100),
            77: DiskProcessCounter(pid: 77, name: "backupd", readBytes: 1_000, writtenBytes: 250)
        ]

        let counters = [
            DiskProcessCounter(pid: 11, name: "Safari", readBytes: 450, writtenBytes: 150),
            DiskProcessCounter(pid: 12, name: "Safari", readBytes: 900, writtenBytes: 300),
            DiskProcessCounter(pid: 77, name: "backupd", readBytes: 1_600, writtenBytes: 250),
            DiskProcessCounter(pid: 99, name: "WindowServer", readBytes: 50, writtenBytes: 50)
        ]

        let activities = DiskProcessSampling.activities(
            from: counters,
            previousCounters: previousCounters,
            limit: 4
        )

        XCTAssertEqual(
            activities,
            [
                DiskProcessActivity(name: "Safari", readBytes: 850, writtenBytes: 300),
                DiskProcessActivity(name: "backupd", readBytes: 600, writtenBytes: 0)
            ]
        )
    }

    func testActivitiesClampCounterResetsAndRespectLimit() {
        let previousCounters: [Int32: DiskProcessCounter] = [
            1: DiskProcessCounter(pid: 1, name: "A", readBytes: 900, writtenBytes: 700),
            2: DiskProcessCounter(pid: 2, name: "B", readBytes: 100, writtenBytes: 100),
            3: DiskProcessCounter(pid: 3, name: "C", readBytes: 100, writtenBytes: 100)
        ]