Backport tests to iOS 8.0.

Example/IRLSizeExample.xcodeproj/project.pbxproj

@@ -866,7 +866,6 @@
 					"$(inherited)",
 				);
 				INFOPLIST_FILE = "../IRLSizeTests/IRLSizeTests-Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.detroitlabs.demo.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				WRAPPER_EXTENSION = xctest;
@@ -883,7 +882,6 @@
 					"$(DEVELOPER_FRAMEWORKS_DIR)",
 				);
 				INFOPLIST_FILE = "../IRLSizeTests/IRLSizeTests-Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				PRODUCT_BUNDLE_IDENTIFIER = "com.detroitlabs.demo.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				WRAPPER_EXTENSION = xctest;

IRLSize.podspec

@@ -31,7 +31,7 @@ Pod::Spec.new do |s|
   s.dependency 'SDVersion', '~> 4.3.0'
 
   s.test_spec 'IRLSizeTests' do |ts|
-    ts.platform = :ios, '10.0'
+    ts.platform = :ios, '8.0'
     ts.source_files = 'IRLSizeTests/*.{h,m}'
     ts.dependency 'Kiwi'
     ts.requires_app_host = true

IRLSizeTests/IRLMeasurementBeWithinMatcher.h

@@ -6,14 +6,15 @@
 //  Copyright © 2018 Detroit Labs. All rights reserved.
 //
 
+#import <IRLSize/IRLSize.h>
 #import <Kiwi/Kiwi.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
 @interface IRLMeasurementBeWithinMatcher : KWMatcher
 
-- (void)beWithin:(double)aDistance ofMeasurement:(NSMeasurement *)aValue;
-- (void)equalMeasurement:(NSMeasurement *)aValue withDelta:(double)aDelta;
+- (void)beWithin:(double)aDistance ofMeasurement:(NSMeasurement *)aValue IRL_IOS_AVAILABLE(10.0);
+- (void)equalMeasurement:(NSMeasurement *)aValue withDelta:(double)aDelta IRL_IOS_AVAILABLE(10.0);
 
 @end
 

IRLSizeTests/IRLMeasurementBeWithinMatcher.m

@@ -14,6 +14,7 @@
 
 #import "NSMeasurement+Equality.h"
 
+IRL_IOS_AVAILABLE(10.0)
 @interface IRLMeasurementBeWithinMatcher()
 
 @property (nonatomic, readwrite) double distance;
@@ -37,13 +38,19 @@ + (NSArray *)matcherStrings
 
 - (BOOL)evaluate
 {
-    NSMeasurement *subject = self.subject;
-
-    NSAssert([subject isKindOfClass:[NSMeasurement class]],
-             @"This matcher can only be used on NSMeasurement instances.");
-
-    return [subject irl_isEqualToMeasurement:self.otherValue
-                                   withDelta:self.distance];
+    if (@available(iOS 10.0, *)) {
+        NSMeasurement *subject = self.subject;
+
+        NSAssert([subject isKindOfClass:[NSMeasurement class]],
+                 @"This matcher can only be used on NSMeasurement instances.");
+
+        return [subject irl_isEqualToMeasurement:self.otherValue
+                                       withDelta:self.distance];
+    }
+    else {
+        NSAssert(false, @"This matcher requires iOS 10 or later.");
+        return false;
+    }
 }
 
 #pragma mark - Getting Failure Messages