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//
// GTMStackTraceTest.m
//
// Copyright 2007-2008 Google Inc.
//
// 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
//
// http://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/Foundation.h>
#import "GTMStackTrace.h"
#import "GTMSenTestCase.h"
@interface GTMStackTraceTest : GTMTestCase
@end
@implementation GTMStackTraceTest
#ifdef GTM_MACOS_SDK // currently not supported on iPhone
- (void)testStackTraceBasic {
NSString *stacktrace = GTMStackTrace();
NSArray *stacklines = [stacktrace componentsSeparatedByString:@"\n"];
STAssertGreaterThan([stacklines count], (NSUInteger)3,
@"stack trace must have > 3 lines");
STAssertLessThan([stacklines count], (NSUInteger)25,
@"stack trace must have < 25 lines");
NSString *firstFrame = [stacklines objectAtIndex:0];
NSRange range = [firstFrame rangeOfString:@"testStackTraceBasic"];
STAssertNotEquals(range.location, (NSUInteger)NSNotFound,
@"First frame should contain testStackTraceBasic,"
" stack trace: %@", stacktrace);
range = [firstFrame rangeOfString:@"#0"];
STAssertNotEquals(range.location, (NSUInteger)NSNotFound,
@"First frame should contain #0, stack trace: %@",
stacktrace);
}
#endif // GTM_MACOS_SDK
#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5
- (void)helperThatThrows {
[NSException raise:@"TestException" format:@"TestExceptionDescription"];
}
- (void)testStackExceptionTrace {
NSException *exception = nil;
@try {
[self helperThatThrows];
}
@catch (NSException * e) {
exception = e;
}
STAssertNotNil(exception, nil);
NSString *stacktrace = GTMStackTraceFromException(exception);
NSArray *stacklines = [stacktrace componentsSeparatedByString:@"\n"];
STAssertGreaterThan([stacklines count], (NSUInteger)4,
@"stack trace must have > 4 lines");
STAssertLessThan([stacklines count], (NSUInteger)25,
@"stack trace must have < 25 lines");
STAssertEquals([stacklines count],
[[exception callStackReturnAddresses] count],
@"stack trace should have the same number of lines as the "
@" array of return addresses. stack trace: %@", stacktrace);
// we can't look for it on a specific frame because NSException doesn't
// really document how deep the stack will be
NSRange range = [stacktrace rangeOfString:@"testStackExceptionTrace"];
STAssertNotEquals(range.location, (NSUInteger)NSNotFound,
@"Stack trace should contain testStackExceptionTrace,"
" stack trace: %@", stacktrace);
}
#endif
#ifdef GTM_MACOS_SDK // currently not supported on iPhone
- (void)testProgramCountersBasic {
void *pcs[10];
NSUInteger depth = 10;
depth = GTMGetStackProgramCounters(pcs, depth);
STAssertGreaterThan(depth, (NSUInteger)3, @"stack trace must have > 3 lines");
STAssertLessThanOrEqual(depth, (NSUInteger)10,
@"stack trace must have < 10 lines");
// pcs is an array of program counters from the stack. pcs[0] should match
// the call into GTMGetStackProgramCounters, which is tough for us to check.
// However, we can verify that pcs[1] is equal to our current return address
// for our current function.
void *current_pc = __builtin_return_address(0);
STAssertEquals(pcs[1], current_pc, @"pcs[1] should equal the current PC");
}
- (void)testProgramCountersMore {
void *pcs0[0];
NSUInteger depth0 = 0;
depth0 = GTMGetStackProgramCounters(pcs0, depth0);
STAssertEquals(depth0, (NSUInteger)0, @"stack trace must have 0 lines");
void *pcs1[1];
NSUInteger depth1 = 1;
depth1 = GTMGetStackProgramCounters(pcs1, depth1);
STAssertEquals(depth1, (NSUInteger)1, @"stack trace must have 1 lines");
void *pcs2[2];
NSUInteger depth2 = 2;
depth2 = GTMGetStackProgramCounters(pcs2, depth2);
STAssertEquals(depth2, (NSUInteger)2, @"stack trace must have 2 lines");
void *current_pc = __builtin_return_address(0);
STAssertEquals(pcs2[1], current_pc, @"pcs[1] should equal the current PC");
}
#endif // GTM_MACOS_SDK
@end
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