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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
- (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);
}
- (void)testProgramCountersBasic {
void *pcs[10];
int depth = 10;
depth = GTMGetStackProgramCounters(pcs, depth);
STAssertGreaterThan(depth, 3, @"stack trace must have > 3 lines");
STAssertLessThanOrEqual(depth, 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];
int depth0 = 0;
depth0 = GTMGetStackProgramCounters(pcs0, depth0);
STAssertEquals(depth0, 0, @"stack trace must have 0 lines");
void *pcs1[1];
int depth1 = 1;
depth1 = GTMGetStackProgramCounters(pcs1, depth1);
STAssertEquals(depth1, 1, @"stack trace must have 1 lines");
void *pcs2[2];
int depth2 = 2;
depth2 = GTMGetStackProgramCounters(pcs2, depth2);
STAssertEquals(depth2, 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");
}
@end
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