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containerization: Add additional tests (#273)
Add additional tests, with varying levels of utility. Before: Overall Code Coverage: 41.73% After: Overall Code Coverage: 42.95% Signed-off-by: Eric Ernst <[email protected]>
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‎Tests/ContainerizationTests/DNSTests.swift‎

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//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import Testing
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@testable import Containerization
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struct DNSTests {
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@Test func dnsResolvConfWithAllFields() {
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let dns = DNS(
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nameservers: ["8.8.8.8", "1.1.1.1"],
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domain: "example.com",
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searchDomains: ["internal.com", "test.com"],
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options: ["ndots:2", "timeout:1"]
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)
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let expected = "nameserver 8.8.8.8\nnameserver 1.1.1.1\ndomain example.com\nsearch internal.com test.com\nopts ndots:2 timeout:1\n"
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#expect(dns.resolvConf == expected)
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}
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@Test func dnsResolvConfWithEmptyFields() {
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let dns = DNS(
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nameservers: [],
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domain: nil,
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searchDomains: [],
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options: []
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)
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// Should return empty string when all fields are empty
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#expect(dns.resolvConf == "")
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}
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@Test func dnsResolvConfWithOnlyNameservers() {
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let dns = DNS(nameservers: ["8.8.8.8"])
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let expected = "nameserver 8.8.8.8\n"
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#expect(dns.resolvConf == expected)
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}
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}

‎Tests/ContainerizationTests/HashTests.swift‎

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//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import Testing
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@testable import Containerization
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struct HashTests {
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@Test func hashMountSourceWithValidString() throws {
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let result = try hashMountSource(source: "/valid/path")
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// Should produce a non-empty hash
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#expect(!result.isEmpty)
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// Same input should produce same hash (deterministic)
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let result2 = try hashMountSource(source: "/valid/path")
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#expect(result == result2)
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// Different inputs should produce different hashes
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let result3 = try hashMountSource(source: "/different/path")
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#expect(result != result3)
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}
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}

‎Tests/ContainerizationTests/HostsTests.swift‎

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//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import Testing
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@testable import Containerization
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struct HostsTests {
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@Test func hostsEntryRenderedWithAllFields() {
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let entry = Hosts.Entry(
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ipAddress: "192.168.1.100",
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hostnames: ["myserver", "server.local"],
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comment: "My local server"
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)
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let expected = "192.168.1.100 myserver server.local # My local server "
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#expect(entry.rendered == expected)
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}
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@Test func hostsEntryRenderedWithoutComment() {
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let entry = Hosts.Entry(
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ipAddress: "10.0.0.1",
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hostnames: ["gateway"]
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)
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let expected = "10.0.0.1 gateway"
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#expect(entry.rendered == expected)
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}
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@Test func hostsEntryRenderedWithEmptyHostnames() {
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let entry = Hosts.Entry(
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ipAddress: "172.16.0.1",
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hostnames: [],
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comment: "Empty hostnames"
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)
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let expected = "172.16.0.1 # Empty hostnames "
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#expect(entry.rendered == expected)
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}
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@Test func hostsFileWithCommentAndEntries() {
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let hosts = Hosts(
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entries: [
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Hosts.Entry(ipAddress: "127.0.0.1", hostnames: ["localhost"]),
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Hosts.Entry(ipAddress: "192.168.1.10", hostnames: ["server"], comment: "Main server"),
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],
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comment: "Generated hosts file"
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)
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let expected = "# Generated hosts file\n127.0.0.1 localhost\n192.168.1.10 server # Main server \n"
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#expect(hosts.hostsFile == expected)
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}
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}

‎Tests/ContainerizationTests/ImageTests.swift‎

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//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import ContainerizationOCI
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import Foundation
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import Testing
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@testable import Containerization
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struct ImageTests {
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@Test func imageDescriptionComputedProperties() {
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let descriptor = Descriptor(
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mediaType: "application/vnd.oci.image.manifest.v1+json",
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digest: "sha256:abc123def456",
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size: 1024
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)
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let description = Image.Description(reference: "myapp:latest", descriptor: descriptor)
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#expect(description.digest == "sha256:abc123def456")
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#expect(description.mediaType == "application/vnd.oci.image.manifest.v1+json")
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#expect(description.reference == "myapp:latest")
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}
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}

‎Tests/ContainerizationTests/KernelTests.swift‎

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let cmdline = kernel.commandLine.kernelArgs.joined(separator: " ")
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#expect(cmdline == expected)
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}
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@Test func kernelCommandLineInitWithDebugTrue() {
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let commandLine = Kernel.CommandLine(debug: true, panic: 5, initArgs: ["--verbose"])
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#expect(commandLine.kernelArgs == ["console=hvc0", "tsc=reliable", "debug", "panic=5"])
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#expect(commandLine.initArgs == ["--verbose"])
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}
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@Test func kernelCommandLineMutatingMethods() {
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var commandLine = Kernel.CommandLine(kernelArgs: ["console=hvc0"], initArgs: [])
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commandLine.addDebug()
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commandLine.addPanic(level: 10)
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#expect(commandLine.kernelArgs == ["console=hvc0", "debug", "panic=10"])
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}
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}

‎Tests/ContainerizationTests/LinuxContainerTests.swift‎

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//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import ContainerizationOCI
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import Foundation
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import Testing
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@testable import Containerization
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struct LinuxContainerTests {
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@Test func processInitFromImageConfigWithAllFields() {
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let imageConfig = ImageConfig(
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user: "appuser",
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env: ["NODE_ENV=production", "PORT=3000"],
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entrypoint: ["/usr/bin/node"],
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cmd: ["app.js", "--verbose"],
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workingDir: "/app"
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)
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let process = LinuxContainer.Configuration.Process(from: imageConfig)
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#expect(process.workingDirectory == "/app")
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#expect(process.environmentVariables == ["NODE_ENV=production", "PORT=3000"])
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#expect(process.arguments == ["/usr/bin/node", "app.js", "--verbose"])
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#expect(process.user.username == "appuser")
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}
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@Test func processInitFromImageConfigWithNilValues() {
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let imageConfig = ImageConfig(
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user: nil,
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env: nil,
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entrypoint: nil,
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cmd: nil,
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workingDir: nil
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)
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let process = LinuxContainer.Configuration.Process(from: imageConfig)
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#expect(process.workingDirectory == "/")
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#expect(process.environmentVariables == [])
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#expect(process.arguments == [])
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#expect(process.user.username == "") // Default User() has empty string username
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}
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@Test func processInitFromImageConfigEntrypointAndCmdConcatenation() {
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let imageConfig = ImageConfig(
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entrypoint: ["/bin/sh", "-c"],
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cmd: ["echo 'hello'", "&&", "sleep 10"]
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)
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let process = LinuxContainer.Configuration.Process(from: imageConfig)
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#expect(process.arguments == ["/bin/sh", "-c", "echo 'hello'", "&&", "sleep 10"])
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}
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}

‎Tests/ContainerizationTests/MountTests.swift‎

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//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import Testing
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@testable import Containerization
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struct MountTests {
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@Test func mountShareCreatesVirtiofsMount() {
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let mount = Mount.share(
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source: "/host/shared",
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destination: "/guest/shared",
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options: ["rw", "noatime"],
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runtimeOptions: ["tag=shared"]
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)
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#expect(mount.type == "virtiofs")
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#expect(mount.source == "/host/shared")
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#expect(mount.destination == "/guest/shared")
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#expect(mount.options == ["rw", "noatime"])
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if case .virtiofs(let opts) = mount.runtimeOptions {
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#expect(opts == ["tag=shared"])
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} else {
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#expect(Bool(false), "Expected virtiofs runtime options")
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}
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}
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}

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