Make the log download test self-contained.

It should not be depending on a helper app started in a particular way; it
should just start that helper app itself.

Author: bzbarsky-apple

.github/workflows/darwin.yaml

@@ -111,8 +111,7 @@ jobs:
               working-directory: src/darwin/Framework
               run: |
                   mkdir -p /tmp/darwin/framework-tests
-                  echo "This is a simple log" > /tmp/darwin/framework-tests/end_user_support_log.txt
-                  ../../../out/debug/all-clusters-app/chip-all-clusters-app --interface-id -1 --end_user_support_log /tmp/darwin/framework-tests/end_user_support_log.txt > >(tee /tmp/darwin/framework-tests/all-cluster-app.log) 2> >(tee /tmp/darwin/framework-tests/all-cluster-app-err.log >&2) &
+                  ../../../out/debug/all-clusters-app/chip-all-clusters-app --interface-id -1 > >(tee /tmp/darwin/framework-tests/all-cluster-app.log) 2> >(tee /tmp/darwin/framework-tests/all-cluster-app-err.log >&2) &
 
                   export TEST_RUNNER_ASAN_OPTIONS=__CURRENT_VALUE__:detect_stack_use_after_return=1
 

src/darwin/Framework/CHIPTests/MTRXPCListenerSampleTests.m

@@ -23,14 +23,14 @@
 #import <Matter/Matter.h>
 
 #import "MTRErrorTestUtils.h"
+#import "MTRTestCase+ServerAppRunner.h"
+#import "MTRTestCase.h"
 #import "MTRTestKeys.h"
-#import "MTRTestResetCommissioneeHelper.h"
 #import "MTRTestStorage.h"
 
 #import <math.h> // For INFINITY
 
 // system dependencies
-#import <XCTest/XCTest.h>
 #import <os/lock.h>
 
 static uint16_t kTestVendorId = 0xFFF1u;
@@ -418,7 +418,8 @@ - (void)readAttributeCacheWithController:(id _Nullable)controller
 static const uint16_t kPairingTimeoutInSeconds = 30;
 static const uint16_t kTimeoutInSeconds = 3;
 static const uint64_t kDeviceId = 0x12344321;
-static NSString * kOnboardingPayload = @"MT:-24J0AFN00KA0648G00";
+static NSString * kOnboardingPayload = @"MT:Y.K90SO527JA0648G00";
+static NSString * kSimpleLogContent = @"This is a simple log\n";
 static const uint16_t kLocalPort = 5541;
 
 // This test suite reuses a device object to speed up the test process for CI.
@@ -501,25 +502,38 @@ - (BOOL)unitTestShouldSkipExpectedValuesForWrite:(MTRDevice *)device
 }
 @end
 
-@interface MTRXPCListenerSampleTests : XCTestCase
+@interface MTRXPCListenerSampleTests : MTRTestCase
 
 @end
 
 static BOOL sStackInitRan = NO;
-static BOOL sNeedsStackShutdown = YES;
 
 @implementation MTRXPCListenerSampleTests
 
++ (void)setUp
+{
+    // Global setup, runs once.
+    [super setUp];
+
+    __auto_type * uniqueName = [[NSUUID UUID] UUIDString];
+    __auto_type * uniquePath = [NSTemporaryDirectory() stringByAppendingPathComponent:uniqueName];
+    [[NSFileManager defaultManager] createFileAtPath:uniquePath
+                                            contents:[kSimpleLogContent dataUsingEncoding:NSUTF8StringEncoding]
+                                          attributes:nil];
+    BOOL started = [self startAppWithName:@"all-clusters"
+                                arguments:@[
+                                    @"--end_user_support_log",
+                                    uniquePath,
+                                ]
+                                  payload:kOnboardingPayload];
+    XCTAssertTrue(started);
+}
+
 + (void)tearDown
 {
     // Global teardown, runs once
-    if (sNeedsStackShutdown) {
-        // We don't need to worry about ResetCommissionee.  If we get here,
-        // we're running only one of our test methods (using
-        // -only-testing:MatterTests/MTROTAProviderTests/testMethodName), since
-        // we did not run test999_TearDown.
-        //        [self shutdownStack];
-    }
+    [self shutdownStack];
+    [super tearDown];
 }
 
 - (void)setUp
@@ -591,8 +605,6 @@ - (void)initStack
 
 + (void)shutdownStack
 {
-    sNeedsStackShutdown = NO;
-
     [mSampleListener stop];
     mSampleListener = nil;
 
@@ -1953,7 +1965,7 @@ - (void)test016_DownloadLog
                        NSError * readError;
                        NSString * fileContent = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&readError];
                        XCTAssertNil(readError);
-                       XCTAssertEqualObjects(fileContent, @"This is a simple log\n");
+                       XCTAssertEqualObjects(fileContent, kSimpleLogContent);
                        [expectation fulfill];
                    }];
     [self waitForExpectationsWithTimeout:kTimeoutInSeconds handler:nil];
@@ -2079,11 +2091,4 @@ - (void)test900_SubscribeClusterStateCache
     [self waitForExpectations:@[ expectation ] timeout:kTimeoutInSeconds];
 }
 
-- (void)test999_TearDown
-{
-    ResetCommissionee(
-        [MTRBaseDevice deviceWithNodeID:@(kDeviceId) controller:sController], dispatch_get_main_queue(), self, kTimeoutInSeconds);
-    [[self class] shutdownStack];
-}
-
 @end