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 "SpecHelpers.h"
@interface MASViewConstraint ()
@property (nonatomic, strong) NSLayoutConstraint *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
SpecBegin(MASViewConstraint)
__block UIView *superview;
__block MASViewConstraint *constraint;
__block MASViewAttribute *secondViewAttribute;
beforeEach(^{
superview = UIView.new;
constraint = createConstraintWithLayoutAttribute(NSLayoutAttributeWidth);
[superview addSubview:constraint.firstViewAttribute.view];
secondViewAttribute = createViewAttribute(NSLayoutAttributeHeight);
[superview addSubview:secondViewAttribute.view];
});
describe(@"equality chaining", ^{
it(@"should return same constraint when encountering equal for first time", ^{
MASViewConstraint *newConstraint = constraint.equalTo(secondViewAttribute);
[verify(constraint.delegate) addConstraint:(id)constraint];
expect(newConstraint).to.beIdenticalTo(constraint);
expect(constraint.secondViewAttribute).to.beIdenticalTo(secondViewAttribute);
expect(constraint.layoutRelation).to.equal(NSLayoutRelationEqual);
});
it(@"should start new constraint when encountering equal subsequently", ^{
constraint.greaterThanOrEqualTo(secondViewAttribute);
MASViewConstraint *newConstraint = constraint.equalTo(secondViewAttribute);
[verify(constraint.delegate) addConstraint:(id)constraint];
[verify(constraint.delegate) addConstraint:(id)newConstraint];
expect(newConstraint).notTo.beIdenticalTo(constraint);
});
it(@"should return same constraint when encountering greaterThanOrEqual for first time", ^{
MASViewConstraint *newConstraint = constraint.greaterThanOrEqualTo(secondViewAttribute);
[verify(constraint.delegate) addConstraint:(id)constraint];
expect(newConstraint).to.beIdenticalTo(constraint);
expect(constraint.secondViewAttribute).to.beIdenticalTo(secondViewAttribute);
expect(constraint.layoutRelation).to.equal(NSLayoutRelationGreaterThanOrEqual);
});
it(@"should start new constraint when encountering greaterThanOrEqual subsequently", ^{
constraint.lessThanOrEqualTo(secondViewAttribute);
MASViewConstraint *newConstraint = constraint.greaterThanOrEqualTo(secondViewAttribute);
[verify(constraint.delegate) addConstraint:(id)constraint];
[verify(constraint.delegate) addConstraint:(id)newConstraint];
expect(newConstraint).notTo.beIdenticalTo(constraint);
});
it(@"should return same constraint when encountering lessThanOrEqual for first time", ^{
MASViewConstraint *newConstraint = constraint.lessThanOrEqualTo(secondViewAttribute);
[verify(constraint.delegate) addConstraint:(id)constraint];
expect(newConstraint).to.beIdenticalTo(constraint);
expect(constraint.secondViewAttribute).to.beIdenticalTo(secondViewAttribute);
expect(constraint.layoutRelation).to.equal(NSLayoutRelationLessThanOrEqual);
});
it(@"should start new constraint when encountering lessThanOrEqual subsequently", ^{
constraint.equalTo(secondViewAttribute);
MASViewConstraint *newConstraint = constraint.lessThanOrEqualTo(secondViewAttribute);
[verify(constraint.delegate) addConstraint:(id)constraint];
[verify(constraint.delegate) addConstraint:(id)newConstraint];
expect(newConstraint).notTo.beIdenticalTo(constraint);
});
it(@"should not allow update of equal once layoutconstraint is created", ^{
[constraint commit];
expect(^{
constraint.equalTo(secondViewAttribute);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should not allow update of lessThanOrEqual once layoutconstraint is created", ^{
[constraint commit];
expect(^{
constraint.lessThanOrEqualTo(secondViewAttribute);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should not allow update of greaterThanOrEqual once layoutconstraint is created", ^{
[constraint commit];
expect(^{
constraint.greaterThanOrEqualTo(secondViewAttribute);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should accept view object", ^{
UIView *view = UIView.new;
constraint.equalTo(view);
expect(constraint.secondViewAttribute.view).to.beIdenticalTo(view);
expect(constraint.firstViewAttribute.layoutAttribute).to.equal(constraint.secondViewAttribute.layoutAttribute);
});
xit(@"should create composite when passed array of views", ^{
});
});
describe(@"multiplier & constant", ^{
it(@"should not allow update of multiplier after layoutconstraint is created", ^{
[constraint commit];
expect(^{
constraint.percent(0.9);
}).to.raise(@"NSInternalInconsistencyException");
});
it(@"should allow update of constant after layoutconstraint is created", ^{
[constraint commit];
constraint.offset(10);
expect(constraint.layoutConstant).to.equal(10);
expect(constraint.layoutConstraint.constant).to.equal(10);
});
it(@"should update sides offset only", ^{
MASViewConstraint *centerY = createConstraintWithLayoutAttribute(NSLayoutAttributeCenterY);
centerY.insets(UIEdgeInsetsMake(10, 10, 10, 10));
expect(centerY.layoutConstant).to.equal(0);
MASViewConstraint *top = createConstraintWithLayoutAttribute(NSLayoutAttributeTop);
top.insets(UIEdgeInsetsMake(15, 10, 10, 10));
expect(top.layoutConstant).to.equal(15);
MASViewConstraint *left = createConstraintWithLayoutAttribute(NSLayoutAttributeLeft);
left.insets(UIEdgeInsetsMake(10, 15, 10, 10));
expect(left.layoutConstant).to.equal(15);
MASViewConstraint *bottom = createConstraintWithLayoutAttribute(NSLayoutAttributeBottom);
bottom.insets(UIEdgeInsetsMake(10, 10, 15, 10));
expect(bottom.layoutConstant).to.equal(-15);
MASViewConstraint *right = createConstraintWithLayoutAttribute(NSLayoutAttributeRight);
right.insets(UIEdgeInsetsMake(10, 10, 10, 15));
expect(right.layoutConstant).to.equal(-15);
});
it(@"should update center offset only", ^{
MASViewConstraint *width = createConstraintWithLayoutAttribute(NSLayoutAttributeWidth);
width.centerOffset(CGPointMake(-20, -10));
expect(width.layoutConstant).to.equal(0);
MASViewConstraint *centerX = createConstraintWithLayoutAttribute(NSLayoutAttributeCenterX);
centerX.centerOffset(CGPointMake(-20, -10));
expect(centerX.layoutConstant).to.equal(-20);
MASViewConstraint *centerY = createConstraintWithLayoutAttribute(NSLayoutAttributeCenterY);
centerY.centerOffset(CGPointMake(-20, -10));
expect(centerY.layoutConstant).to.equal(-10);
});
it(@"should update size offset only", ^{
MASViewConstraint *bottom = createConstraintWithLayoutAttribute(NSLayoutAttributeBottom);
bottom.sizeOffset(CGSizeMake(-40, 55));
expect(bottom.layoutConstant).to.equal(0);
MASViewConstraint *width = createConstraintWithLayoutAttribute(NSLayoutAttributeWidth);
width.sizeOffset(CGSizeMake(-40, 55));
expect(width.layoutConstant).to.equal(-40);
MASViewConstraint *height = createConstraintWithLayoutAttribute(NSLayoutAttributeHeight);
height.sizeOffset(CGSizeMake(-40, 55));
expect(height.layoutConstant).to.equal(55);
});
});
describe(@"commit", ^{
it(@"should create layout constraint", ^{
constraint.equalTo(secondViewAttribute);
constraint.percent(0.5);
constraint.offset(10);
constraint.priority(345);
[constraint commit];
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);
});
});
SpecEnd