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//
// GTMUnitTestingUtilities.m
//
// Copyright 2006-2008 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 "GTMUnitTestingUtilities.h"
#import <AppKit/AppKit.h>
#import "GTMDefines.h"
// The Users profile before we change it on them
static CMProfileRef gCurrentColorProfile = NULL;
// Compares two color profiles
static BOOL AreCMProfilesEqual(CMProfileRef a, CMProfileRef b);
// Stores the user's color profile away, and changes over to generic.
static void SetColorProfileToGenericRGB();
// Restores the users profile.
static void RestoreColorProfile(void);
@implementation GTMUnitTestingUtilities
// Returns YES if we are currently being unittested.
+ (BOOL)areWeBeingUnitTested {
BOOL answer = NO;
// Check to see if the SenTestProbe class is linked in before we call it.
Class SenTestProbeClass = NSClassFromString(@"SenTestProbe");
if (SenTestProbeClass != Nil) {
// Doing this little dance so we don't actually have to link
// SenTestingKit in
SEL selector = NSSelectorFromString(@"isTesting");
NSMethodSignature *sig = [SenTestProbeClass methodSignatureForSelector:selector];
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:sig];
[invocation setSelector:selector];
[invocation invokeWithTarget:SenTestProbeClass];
[invocation getReturnValue:&answer];
}
return answer;
}
// Sets up the user interface so that we can run consistent UI unittests on it.
+ (void)setUpForUIUnitTests {
// Give some names to undocumented defaults values
const NSInteger MediumFontSmoothing = 2;
const NSInteger BlueTintedAppearance = 1;
// This sets up some basic values that we want as our defaults for doing pixel
// based user interface tests. These defaults only apply to the unit test app,
// except or the color profile which will be set system wide, and then
// restored when the tests complete.
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
// Scroll arrows together bottom
[defaults setObject:@"DoubleMax" forKey:@"AppleScrollBarVariant"];
// Smallest font size to CG should perform antialiasing on
[defaults setInteger:4 forKey:@"AppleAntiAliasingThreshold"];
// Type of smoothing
[defaults setInteger:MediumFontSmoothing forKey:@"AppleFontSmoothing"];
// Blue aqua
[defaults setInteger:BlueTintedAppearance forKey:@"AppleAquaColorVariant"];
// Standard highlight colors
[defaults setObject:@"0.709800 0.835300 1.000000"
forKey:@"AppleHighlightColor"];
[defaults setObject:@"0.500000 0.500000 0.500000"
forKey:@"AppleOtherHighlightColor"];
// Use english plz
[defaults setObject:[NSArray arrayWithObject:@"en"] forKey:@"AppleLanguages"];
// How fast should we draw sheets. This speeds up the sheet tests considerably
[defaults setFloat:.001f forKey:@"NSWindowResizeTime"];
// Switch over the screen profile to "generic rgb". This installs an
// atexit handler to return our profile back when we are done.
SetColorProfileToGenericRGB();
}
+ (void)setUpForUIUnitTestsIfBeingTested {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
if ([self areWeBeingUnitTested]) {
[self setUpForUIUnitTests];
}
[pool release];
}
@end
BOOL AreCMProfilesEqual(CMProfileRef a, CMProfileRef b) {
BOOL equal = YES;
if (a != b) {
CMProfileMD5 aMD5;
CMProfileMD5 bMD5;
CMError aMD5Err = CMGetProfileMD5(a, aMD5);
CMError bMD5Err = CMGetProfileMD5(b, bMD5);
equal = (!aMD5Err &&
!bMD5Err &&
!memcmp(aMD5, bMD5, sizeof(CMProfileMD5))) ? YES : NO;
}
return equal;
}
static void RestoreColorProfile(void) {
if (gCurrentColorProfile) {
CGDirectDisplayID displayID = CGMainDisplayID();
CMError error = CMSetProfileByAVID((UInt32)displayID, gCurrentColorProfile);
if (error) {
// COV_NF_START
// No way to force this case in a unittest.
_GTMDevLog(@"Failed to restore previous color profile! "
"You may need to open System Preferences : Displays : Color "
"and manually restore your color settings. (Error: %i)", error);
// COV_NF_END
} else {
_GTMDevLog(@"Color profile restored");
}
gCurrentColorProfile = NULL;
}
}
void SetColorProfileToGenericRGB(void) {
NSColorSpace *genericSpace = [NSColorSpace genericRGBColorSpace];
CMProfileRef genericProfile = (CMProfileRef)[genericSpace colorSyncProfile];
CMProfileRef previousProfile;
CGDirectDisplayID displayID = CGMainDisplayID();
CMError error = CMGetProfileByAVID((UInt32)displayID, &previousProfile);
if (error) {
// COV_NF_START
// No way to force this case in a unittest.
_GTMDevLog(@"Failed to get current color profile. "
"I will not be able to restore your current profile, thus I'm "
"not changing it. Many unit tests may fail as a result. (Error: %i)",
error);
return;
// COV_NF_END
}
if (AreCMProfilesEqual(genericProfile, previousProfile)) {
return;
}
CFStringRef previousProfileName;
CFStringRef genericProfileName;
CMCopyProfileDescriptionString(previousProfile, &previousProfileName);
CMCopyProfileDescriptionString(genericProfile, &genericProfileName);
_GTMDevLog(@"Temporarily changing your system color profile from \"%@\" to \"%@\".",
previousProfileName, genericProfileName);
_GTMDevLog(@"This allows the pixel-based unit-tests to have consistent color "
"values across all machines.");
_GTMDevLog(@"The colors on your screen will change for the duration of the testing.");
if ((error = CMSetProfileByAVID((UInt32)displayID, genericProfile))) {
// COV_NF_START
// No way to force this case in a unittest.
_GTMDevLog(@"Failed to set color profile to \"%@\"! Many unit tests will fail as "
"a result. (Error: %i)", genericProfileName, error);
// COV_NF_END
} else {
gCurrentColorProfile = previousProfile;
atexit(RestoreColorProfile);
}
CFRelease(previousProfileName);
CFRelease(genericProfileName);
}
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