MASViewConstraintSpec.m
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//
// MASViewConstraintSpec.m
// Masonry
//
// Created by Jonas Budelmann on 21/07/13.
// Copyright (c) 2013 cloudling. All rights reserved.
//
#import "MASViewConstraint.h"
#import "MASConstraint.h"
#import "View+MASAdditions.h"
#import "MASConstraintDelegateMock.h"
#import "MASCompositeConstraint.h"
@interface MASViewConstraint ()
@property (nonatomic, weak) MASLayoutConstraint *layoutConstraint;
@property (nonatomic, assign) NSLayoutRelation layoutRelation;
@property (nonatomic, assign) MASLayoutPriority layoutPriority;
@property (nonatomic, assign) CGFloat layoutMultiplier;
@property (nonatomic, assign) CGFloat layoutConstant;
@property (nonatomic, assign) BOOL hasLayoutRelation;
@end
@interface MASCompositeConstraint () <MASConstraintDelegate>
@property (nonatomic, strong) NSMutableArray *childConstraints;
@end
SpecBegin(MASViewConstraint)
__block MASConstraintDelegateMock *delegate;
__block MAS_VIEW *superview;
__block MASViewConstraint *constraint;
__block MAS_VIEW *otherView;
beforeEach(^{
superview = MAS_VIEW.new;
delegate = MASConstraintDelegateMock.new;
MAS_VIEW *view = MAS_VIEW.new;
constraint = [[MASViewConstraint alloc] initWithFirstViewAttribute:view.mas_width];
constraint.delegate = delegate;
[superview addSubview:view];
otherView = MAS_VIEW.new;
[superview addSubview:otherView];
});
describe(@"create equality constraint", ^{
it(@"should create equal constraint", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_top;
MASViewConstraint *newConstraint = (id)constraint.equalTo(secondViewAttribute);
expect(newConstraint).to.beIdenticalTo(constraint);
expect(constraint.secondViewAttribute).to.beIdenticalTo(secondViewAttribute);
expect(constraint.layoutRelation).to.equal(NSLayoutRelationEqual);
});
it(@"should create greaterThanOrEqual constraint", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_top;
MASViewConstraint *newConstraint = (id)constraint.greaterThanOrEqualTo(secondViewAttribute);
expect(newConstraint).to.beIdenticalTo(constraint);
expect(constraint.secondViewAttribute).to.beIdenticalTo(secondViewAttribute);
expect(constraint.layoutRelation).to.equal(NSLayoutRelationGreaterThanOrEqual);
});
it(@"create lessThanOrEqual constraint", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_top;
MASViewConstraint *newConstraint = (id)constraint.lessThanOrEqualTo(secondViewAttribute);
expect(newConstraint).to.beIdenticalTo(constraint);
expect(constraint.secondViewAttribute).to.beIdenticalTo(secondViewAttribute);
expect(constraint.layoutRelation).to.equal(NSLayoutRelationLessThanOrEqual);
});
it(@"should not allow update of equal", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_top;
constraint.lessThanOrEqualTo(secondViewAttribute);
expect(^{
constraint.equalTo(secondViewAttribute);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should not allow update of lessThanOrEqual", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_top;
constraint.equalTo(secondViewAttribute);
expect(^{
constraint.lessThanOrEqualTo(secondViewAttribute);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should not allow update of greaterThanOrEqual", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_top;
constraint.greaterThanOrEqualTo(secondViewAttribute);
expect(^{
constraint.greaterThanOrEqualTo(secondViewAttribute);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should accept view object", ^{
MAS_VIEW *view = MAS_VIEW.new;
constraint.equalTo(view);
expect(constraint.secondViewAttribute.view).to.beIdenticalTo(view);
expect(constraint.firstViewAttribute.layoutAttribute).to.equal(constraint.secondViewAttribute.layoutAttribute);
});
it(@"should create composite when passed array of views", ^{
NSArray *views = @[MAS_VIEW.new, MAS_VIEW.new, MAS_VIEW.new];
[delegate.constraints addObject:constraint];
MASCompositeConstraint *composite = (id)constraint.equalTo(views).priorityMedium().offset(-10);
expect(delegate.constraints).to.haveCountOf(1);
expect(delegate.constraints[0]).to.beKindOf(MASCompositeConstraint.class);
for (MASViewConstraint *constraint in composite.childConstraints) {
NSUInteger index = [composite.childConstraints indexOfObject:constraint];
expect(constraint.secondViewAttribute.view).to.beIdenticalTo((MAS_VIEW *)views[index]);
expect(constraint.firstViewAttribute.layoutAttribute).to.equal(NSLayoutAttributeWidth);
expect(constraint.secondViewAttribute.layoutAttribute).to.equal(NSLayoutAttributeWidth);
expect(constraint.layoutPriority).to.equal(MASLayoutPriorityDefaultMedium);
expect(constraint.layoutConstant).to.equal(-10);
}
});
it(@"should create composite when passed array of attributes", ^{
NSArray *viewAttributes = @[MAS_VIEW.new.mas_height, MAS_VIEW.new.mas_left];
[delegate.constraints addObject:constraint];
MASCompositeConstraint *composite = (id)constraint.equalTo(viewAttributes).priority(60).offset(10);
expect(delegate.constraints).to.haveCountOf(1);
expect(delegate.constraints[0]).to.beKindOf(MASCompositeConstraint.class);
for (MASViewConstraint *constraint in composite.childConstraints) {
NSUInteger index = [composite.childConstraints indexOfObject:constraint];
expect(constraint.secondViewAttribute.view).to.beIdenticalTo([viewAttributes[index] view]);
expect(constraint.firstViewAttribute.layoutAttribute).to.equal(NSLayoutAttributeWidth);
expect(constraint.secondViewAttribute.layoutAttribute).to.equal([viewAttributes[index] layoutAttribute]);
expect(constraint.layoutPriority).to.equal(60);
expect(constraint.layoutConstant).to.equal(10);
}
});
it(@"should complain when using unnsupported equality argument", ^{
expect(^{
constraint.equalTo(@{});
}).to.raise(@"NSInternalInconsistencyException");
});
});
describe(@"prioritise", ^{
it(@"should set priorityHigh", ^{
constraint.equalTo(otherView);
constraint.with.priorityHigh();
[constraint install];
expect(constraint.layoutPriority).to.equal(MASLayoutPriorityDefaultHigh);
expect(constraint.layoutConstraint.priority).to.equal(MASLayoutPriorityDefaultHigh);
});
it(@"should set priorityLow", ^{
constraint.equalTo(otherView);
constraint.with.priorityLow();
[constraint install];
expect(constraint.layoutPriority).to.equal(MASLayoutPriorityDefaultLow);
expect(constraint.layoutConstraint.priority).to.equal(MASLayoutPriorityDefaultLow);
});
it(@"should set priorityMedium", ^{
constraint.equalTo(otherView);
constraint.with.priorityMedium();
[constraint install];
expect(constraint.layoutPriority).to.equal(MASLayoutPriorityDefaultMedium);
expect(constraint.layoutConstraint.priority).to.equal(MASLayoutPriorityDefaultMedium);
});
});
describe(@"multiplier & constant", ^{
it(@"should not allow update of multiplier after layoutconstraint is created", ^{
[constraint install];
expect(^{
constraint.multipliedBy(0.9);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should set multipler with multipliedBy", ^{
constraint.equalTo(otherView);
constraint.multipliedBy(5);
[constraint install];
expect(constraint.layoutMultiplier).to.equal(5);
expect(constraint.layoutConstraint.multiplier).to.equal(5);
});
it(@"should set multipler with dividedBy", ^{
constraint.equalTo(otherView);
constraint.dividedBy(10);
[constraint install];
expect(constraint.layoutMultiplier).to.equal(0.1);
expect(constraint.layoutConstraint.multiplier).to.beCloseTo(0.1);
});
it(@"should allow update of constant after layoutconstraint is created", ^{
[constraint install];
constraint.offset(10);
expect(constraint.layoutConstant).to.equal(10);
expect(constraint.layoutConstraint.constant).to.equal(10);
});
it(@"should update sides offset only", ^{
MASViewConstraint *centerY = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_centerY];
centerY.with.insets((MASEdgeInsets){10, 10, 10, 10});
expect(centerY.layoutConstant).to.equal(0);
MASViewConstraint *top = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_top];
top.insets((MASEdgeInsets){15, 10, 10, 10});
expect(top.layoutConstant).to.equal(15);
MASViewConstraint *left = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_left];
left.insets((MASEdgeInsets){10, 15, 10, 10});
expect(left.layoutConstant).to.equal(15);
MASViewConstraint *bottom = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_bottom];
bottom.insets((MASEdgeInsets){10, 10, 15, 10});
expect(bottom.layoutConstant).to.equal(-15);
MASViewConstraint *right = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_right];
right.insets((MASEdgeInsets){10, 10, 10, 15});
expect(right.layoutConstant).to.equal(-15);
});
it(@"should update center offset only", ^{
MASViewConstraint *width = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_width];
width.centerOffset(CGPointMake(-20, -10));
expect(width.layoutConstant).to.equal(0);
MASViewConstraint *centerX = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_centerX];
centerX.centerOffset(CGPointMake(-20, -10));
expect(centerX.layoutConstant).to.equal(-20);
MASViewConstraint *centerY = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_centerY];
centerY.centerOffset(CGPointMake(-20, -10));
expect(centerY.layoutConstant).to.equal(-10);
});
it(@"should update size offset only", ^{
MASViewConstraint *bottom = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_bottom];
bottom.sizeOffset(CGSizeMake(-40, 55));
expect(bottom.layoutConstant).to.equal(0);
MASViewConstraint *width = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_width];
width.sizeOffset(CGSizeMake(-40, 55));
expect(width.layoutConstant).to.equal(-40);
MASViewConstraint *height = [[MASViewConstraint alloc] initWithFirstViewAttribute:otherView.mas_height];
height.sizeOffset(CGSizeMake(-40, 55));
expect(height.layoutConstant).to.equal(55);
});
});
describe(@"install", ^{
it(@"should create layout constraint on commit", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_height;
constraint.equalTo(secondViewAttribute);
constraint.multipliedBy(0.5);
constraint.offset(10);
constraint.priority(345);
[constraint install];
expect(constraint.layoutConstraint.firstAttribute).to.equal(NSLayoutAttributeWidth);
expect(constraint.layoutConstraint.secondAttribute).to.equal(NSLayoutAttributeHeight);
expect(constraint.layoutConstraint.firstItem).to.beIdenticalTo(constraint.firstViewAttribute.view);
expect(constraint.layoutConstraint.secondItem).to.beIdenticalTo(constraint.secondViewAttribute.view);
expect(constraint.layoutConstraint.relation).to.equal(NSLayoutRelationEqual);
expect(constraint.layoutConstraint.constant).to.equal(10);
expect(constraint.layoutConstraint.priority).to.equal(345);
expect(constraint.layoutConstraint.multiplier).to.equal(0.5);
expect(superview.constraints[0]).to.beIdenticalTo(constraint.layoutConstraint);
});
it(@"alignment should be relative to superview", ^{
MAS_VIEW *view = MAS_VIEW.new;
constraint = [[MASViewConstraint alloc] initWithFirstViewAttribute:view.mas_baseline];
constraint.delegate = delegate;
[superview addSubview:view];
constraint.equalTo(@10);
[constraint install];
expect(constraint.layoutConstraint.firstAttribute).to.equal(NSLayoutAttributeBaseline);
expect(constraint.layoutConstraint.secondAttribute).to.equal(NSLayoutAttributeBaseline);
expect(constraint.layoutConstraint.firstItem).to.beIdenticalTo(constraint.firstViewAttribute.view);
expect(constraint.layoutConstraint.secondItem).to.beIdenticalTo(superview);
expect(constraint.layoutConstraint.relation).to.equal(NSLayoutRelationEqual);
expect(constraint.layoutConstraint.constant).to.equal(10);
expect(superview.constraints[0]).to.beIdenticalTo(constraint.layoutConstraint);
});
it(@"size should be constant", ^{
constraint.equalTo(@10);
[constraint install];
expect(constraint.layoutConstraint.firstAttribute).to.equal(NSLayoutAttributeWidth);
expect(constraint.layoutConstraint.secondAttribute).to.equal(NSLayoutAttributeNotAnAttribute);
expect(constraint.layoutConstraint.firstItem).to.beIdenticalTo(constraint.firstViewAttribute.view);
expect(constraint.layoutConstraint.secondItem).to.beNil();
expect(constraint.layoutConstraint.relation).to.equal(NSLayoutRelationEqual);
expect(constraint.layoutConstraint.constant).to.equal(10);
expect(constraint.firstViewAttribute.view.constraints[0]).to.beIdenticalTo(constraint.layoutConstraint);
});
it(@"should uninstall constraint", ^{
MASViewAttribute *secondViewAttribute = otherView.mas_height;
constraint.equalTo(secondViewAttribute);
[constraint install];
expect(superview.constraints).to.haveCountOf(1);
expect(superview.constraints[0]).to.equal(constraint.layoutConstraint);
[constraint uninstall];
expect(superview.constraints).to.haveCountOf(0);
});
});
SpecEnd