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//
// GTMLinearRGBShadingTest.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 <SenTestingKit/SenTestingKit.h>
#import "GTMLinearRGBShading.h"
#import "GTMNSColor+Theme.h"
@interface GTMLinearRGBShadingTest : SenTestCase
@end
@implementation GTMLinearRGBShadingTest
- (void)testShadingFrom {
// Create a shading from red to blue, and check if 50% is purple
NSColor *red = [NSColor gtm_deviceRedColor];
NSColor *blue = [NSColor gtm_deviceBlueColor];
NSColor *purple = [NSColor gtm_devicePurpleColor];
GTMLinearRGBShading *theShading =
[GTMLinearRGBShading shadingFromColor:red
toColor:blue
fromSpaceNamed:NSDeviceRGBColorSpace];
STAssertNotNil(theShading,nil);
STAssertTrue([theShading stopCount] == 2, nil);
float *theColor = (float*)[theShading valueAtPosition: 0.5];
STAssertTrue(theColor[0] == [purple redComponent] &&
theColor[1] == [purple greenComponent] &&
theColor[2] == [purple blueComponent] &&
theColor[3] == [purple alphaComponent], nil);
}
- (void)testShadingWith {
// Create a shading with kColorCount colors and make sure all the values are there.
const unsigned int kColorCount = 100;
NSColor *theColors[kColorCount];
float thePositions[kColorCount];
const float kColorIncrement = 1.0f / kColorCount;
for (unsigned int i = 0; i < kColorCount; i++) {
thePositions[i] = kColorIncrement * i;
theColors[i] = [NSColor colorWithDeviceRed:kColorIncrement * i
green:kColorIncrement * i
blue:kColorIncrement * i
alpha:kColorIncrement * i];
}
GTMLinearRGBShading *theShading =
[GTMLinearRGBShading shadingWithColors:theColors
fromSpaceNamed:NSDeviceRGBColorSpace
atPositions:thePositions
count:kColorCount];
for (unsigned int i = 0; i < kColorCount; i++) {
float *theColor = (float*)[theShading valueAtPosition: kColorIncrement * i];
STAssertTrue(theColor[0] == kColorIncrement * i &&
theColor[1] == kColorIncrement * i &&
theColor[2] == kColorIncrement * i &&
theColor[3] == kColorIncrement * i, nil);
}
}
- (void)testShadeFunction {
GTMLinearRGBShading *theShading =
[GTMLinearRGBShading shadingWithColors:nil
fromSpaceNamed:NSDeviceRGBColorSpace
atPositions:nil
count:0];
CGFunctionRef theFunction = [theShading shadeFunction];
STAssertTrue(nil != theFunction, nil);
STAssertTrue(CFGetTypeID(theFunction) == CGFunctionGetTypeID(), nil);
}
- (void)testColorSpace {
GTMLinearRGBShading *theShading =
[GTMLinearRGBShading shadingWithColors:nil
fromSpaceNamed:NSDeviceRGBColorSpace
atPositions:nil
count:0];
CGColorSpaceRef theColorSpace = [theShading colorSpace];
STAssertTrue(nil != theColorSpace, nil);
STAssertTrue(CFGetTypeID(theColorSpace) == CGColorSpaceGetTypeID(), nil);
}
@end
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