Add container prune testcases

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

Author: tico88612

Makefile

@@ -176,6 +176,7 @@ integration: init-block
 		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLIExecCommand || exit_code=1 ; \
 		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLICreateCommand || exit_code=1 ; \
 		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLIRunCommand || exit_code=1 ; \
+		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLIPruneCommand || exit_code=1 ; \
 		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLIStatsCommand || exit_code=1 ; \
 		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLIImagesCommand || exit_code=1 ; \
 		$(SWIFT) test -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --filter TestCLIRunBase || exit_code=1 ; \

Tests/CLITests/Subcommands/Containers/TestCLIPrune.swift

@@ -0,0 +1,86 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2025 Apple Inc. and the container project authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===----------------------------------------------------------------------===//
+
+import Foundation
+import Testing
+
+@Suite(.serialized)
+class TestCLIPruneCommand: CLITest {
+    private func getTestName() -> String {
+        Test.current!.name.trimmingCharacters(in: ["(", ")"]).lowercased()
+    }
+
+    @Test func testContainerPruneNoContainers() throws {
+        let (_, output, error, status) = try run(arguments: ["prune"])
+        if status != 0 {
+            throw CLIError.executionFailed("container prune failed: \(error)")
+        }
+
+        #expect(output.contains("No containers to prune"), "should show no containers message")
+    }
+
+    @Test func testContainerPruneStoppedContainers() throws {
+        let testName = getTestName()
+        let npcName = "\(testName)_wont_be_pruned"
+        let pc0Name = "\(testName)_pruned_0"
+        let pc1Name = "\(testName)_pruned_1"
+
+        try doLongRun(name: npcName, containerArgs: ["sleep", "3600"], autoRemove: true)
+        try doLongRun(name: pc0Name, containerArgs: ["sleep", "3600"], autoRemove: false)
+        try doLongRun(name: pc1Name, containerArgs: ["sleep", "3600"], autoRemove: false)
+        defer {
+            try? doStop(name: npcName)
+            try? doStop(name: pc0Name)
+            try? doStop(name: pc1Name)
+            try? doRemove(name: npcName)
+            try? doRemove(name: pc0Name)
+            try? doRemove(name: pc1Name)
+        }
+        try waitForContainerRunning(npcName)
+        try waitForContainerRunning(pc0Name)
+        try waitForContainerRunning(pc1Name)
+
+        try doStop(name: pc0Name)
+        try doStop(name: pc1Name)
+
+        // Poll status until both containers are stopped, with interval checks and a timeout to avoid infinite loop
+        let start = Date()
+        let timeout: TimeInterval = 30  // seconds
+        while true {
+            let s0 = try getContainerStatus(pc0Name)
+            let s1 = try getContainerStatus(pc1Name)
+            if s0 == "stopped" && s1 == "stopped" { break }
+            if Date().timeIntervalSince(start) > timeout {
+                throw CLIError.executionFailed("Timeout waiting for containers to stop: pc0=\(s0), pc1=\(s1)")
+            }
+            Thread.sleep(forTimeInterval: 0.2)
+        }
+
+        let (_, output, error, status) = try run(arguments: ["prune"])
+
+        if status != 0 {
+            throw CLIError.executionFailed("container prune failed: \(error)")
+        }
+
+        let lines = output.components(separatedBy: .newlines)
+
+        #expect(lines.count >= 5, "should have at least 5 lines included header, 2 lines, 1 empty line and 1 line space reclaimed")
+        #expect(output.contains("Pruned containers"), "should remove the stopped containers and show no space reclaimed or no containers message")
+
+        let checkStatus = try getContainerStatus(npcName)
+        #expect(checkStatus == "running", "not pruned container should still be running")
+    }
+}