Document function and add tests for verify claims method

README.md

@@ -291,6 +291,12 @@ rescue JWT::ExpiredSignature
 end
 ```
 
+The Expiration Claim verification can be disabled.
+```ruby
+# Decode token without raising JWT::ExpiredSignature error
+JWT.decode token, hmac_secret, true, { verify_expiration: false, algorithm: 'HS256' }
+```
+
 **Adding Leeway**
 
 ```ruby
@@ -331,6 +337,12 @@ rescue JWT::ImmatureSignature
 end
 ```
 
+The Not Before Claim verification can be disabled.
+```ruby
+# Decode token without raising JWT::ImmatureSignature error
+JWT.decode token, hmac_secret, true, { verify_not_before: false, algorithm: 'HS256' }
+```
+
 **Adding Leeway**
 
 ```ruby

spec/jwt/verify_spec.rb

@@ -225,5 +225,32 @@ module JWT # rubocop:disable Metrics/ModuleLength
         Verify.verify_sub(base_payload.merge('sub' => sub), options.merge(sub: sub))
       end
     end
+
+    context '.verify_claims' do
+      let(:fail_verifications_options) { { iss: 'mismatched-issuer', aud: 'no-match', sub: 'some subject' } }
+      let(:fail_verifications_payload) {
+        {
+          'exp' => (Time.now.to_i - 50),
+          'jti' => '   ',
+          'iss' => 'some-issuer',
+          'nbf' => (Time.now.to_i + 50),
+          'iat' => 'not a number',
+          'sub' => 'not-a-match'
+        }
+      }
+
+      %w[verify_aud verify_expiration verify_iat verify_iss verify_jti verify_not_before verify_sub].each do |method|
+        let(:payload) { base_payload.merge(fail_verifications_payload) }
+        it "must skip verification when #{method} option is set to false" do
+          Verify.verify_claims(payload, options.merge(method => false))
+        end
+
+        it "must raise error when #{method} option is set to true" do
+          expect do
+            Verify.verify_claims(payload, options.merge(method => true).merge(fail_verifications_options))
+          end.to raise_error
+        end
+      end
+    end
   end
 end