Adds cocoapods for libraries.

Adds OCMockito and OCHamcrest libs.

Pods/OCHamcrest/Source/Library/Object/HCThrowsException.m

@@ -0,0 +1,84 @@
+//  OCHamcrest by Jon Reid, https://qualitycoding.org/
+//  Copyright 2019 hamcrest.org. See LICENSE.txt
+
+#import "HCThrowsException.h"
+
+
+static void HCRequireMatcher(id obj)
+{
+    if (![obj conformsToProtocol:@protocol(HCMatcher)])
+    {
+        @throw [NSException exceptionWithName:@"NonMatcher"
+                                       reason:@"Must be matcher"
+                                     userInfo:nil];
+    }
+}
+
+
+@interface HCThrowsException()
+@property (nonatomic, strong, readonly) id <HCMatcher> exceptionMatcher;
+@end
+
+@implementation HCThrowsException
+
+- (id)initWithExceptionMatcher:(id)exceptionMatcher
+{
+    HCRequireMatcher(exceptionMatcher);
+
+    self = [super init];
+    if (self)
+        _exceptionMatcher = exceptionMatcher;
+    return self;
+}
+
+- (BOOL)matches:(nullable id)item describingMismatchTo:(id <HCDescription>)mismatchDescription
+{
+    if (![self isBlock:item])
+    {
+        [[mismatchDescription appendText:@"was non-block "] appendDescriptionOf:item];
+        return NO;
+    }
+
+    typedef void (^HCThrowsExceptionBlock)(void);
+    HCThrowsExceptionBlock block = item;
+    @try
+    {
+        block();
+    }
+    @catch (id exception)
+    {
+        BOOL match = [self.exceptionMatcher matches:exception];
+        if (!match)
+        {
+            [mismatchDescription appendText:@"exception thrown but "];
+            [self.exceptionMatcher describeMismatchOf:exception to:mismatchDescription];
+        }
+        return match;
+    }
+
+    [mismatchDescription appendText:@"no exception thrown"];
+    return NO;
+}
+
+- (BOOL)isBlock:(id)item
+{
+    id block = ^{};
+    Class blockClass = [block class];
+    while ([blockClass superclass] != [NSObject class])
+        blockClass = [blockClass superclass];
+    return [item isKindOfClass:blockClass];
+}
+
+- (void)describeTo:(id <HCDescription>)description
+{
+    [[description appendText:@"a block with no arguments, throwing an exception which is "]
+            appendDescriptionOf:self.exceptionMatcher];
+}
+
+@end
+
+
+id HC_throwsException(id exceptionMatcher)
+{
+    return [[HCThrowsException alloc] initWithExceptionMatcher:exceptionMatcher];
+}