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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
+ (BOOL)classMethodTest {
NSString *stacktrace = GTMStackTrace();
NSArray *stacklines = [stacktrace componentsSeparatedByString:@"\n"];
NSString *firstFrame = [stacklines objectAtIndex:0];
NSRange range = [firstFrame rangeOfString:@"+"];
return range.location != NSNotFound;
}
- (void)testStackTraceBasic {
NSString *stacktrace = GTMStackTrace();
NSArray *stacklines = [stacktrace componentsSeparatedByString:@"\n"];
XCTAssertGreaterThan([stacklines count], (NSUInteger)3,
@"stack trace must have > 3 lines");
XCTAssertLessThan([stacklines count], (NSUInteger)100,
@"stack trace must have < 100 lines");
NSString *firstFrame = [stacklines objectAtIndex:0];
NSRange range = [firstFrame rangeOfString:@"testStackTraceBasic"];
XCTAssertNotEqual(range.location, (NSUInteger)NSNotFound,
@"First frame should contain testStackTraceBasic,"
" stack trace: %@", stacktrace);
range = [firstFrame rangeOfString:@"#0"];
XCTAssertNotEqual(range.location, (NSUInteger)NSNotFound,
@"First frame should contain #0, stack trace: %@",
stacktrace);
range = [firstFrame rangeOfString:@"-"];
XCTAssertNotEqual(range.location, (NSUInteger)NSNotFound,
@"First frame should contain - since it's "
@"an instance method: %@", stacktrace);
XCTAssertTrue([[self class] classMethodTest], @"First frame should contain"
@"+ since it's a class method");
}
-(void)testGetStackAddressDescriptors {
struct GTMAddressDescriptor descs[100];
size_t depth = sizeof(descs) / sizeof(struct GTMAddressDescriptor);
depth = GTMGetStackAddressDescriptors(descs, depth);
// Got atleast 4...
XCTAssertGreaterThan(depth, (size_t)4);
// All that we got have symbols
for (NSUInteger lp = 0 ; lp < depth ; ++lp) {
XCTAssertNotNULL(descs[lp].symbol, @"didn't get a symbol at depth %lu",
(unsigned long)lp);
}
// Do it again, but don't give it enough space (to make sure it handles that)
size_t fullDepth = depth;
XCTAssertGreaterThan(fullDepth, (size_t)4);
depth -= 2;
depth = GTMGetStackAddressDescriptors(descs, depth);
XCTAssertLessThan(depth, fullDepth);
// All that we got have symbols
for (NSUInteger lp = 0 ; lp < depth ; ++lp) {
XCTAssertNotNULL(descs[lp].symbol, @"didn't get a symbol at depth %lu",
(unsigned long)lp);
}
}
- (void)helperThatThrows {
[NSException raise:@"TestException" format:@"TestExceptionDescription"];
}
- (void)testStackExceptionTrace {
NSException *exception = nil;
@try {
[self helperThatThrows];
}
@catch (NSException * e) {
exception = e;
}
XCTAssertNotNil(exception);
NSString *stacktrace = GTMStackTraceFromException(exception);
NSArray *stacklines = [stacktrace componentsSeparatedByString:@"\n"];
XCTAssertGreaterThan([stacklines count], (NSUInteger)4,
@"stack trace must have > 4 lines\n%@", stacktrace);
XCTAssertLessThan([stacklines count], (NSUInteger)100,
@"stack trace must have < 100 lines\n%@", stacktrace);
XCTAssertEqual([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"];
XCTAssertNotEqual(range.location, (NSUInteger)NSNotFound,
@"Stack trace should contain testStackExceptionTrace,"
" stack trace: %@", stacktrace);
}
@end
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