Review comments

faraday-net_http_persistent.gemspec

@@ -25,5 +25,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "faraday", "~> 2.5"
-  spec.add_dependency "net-http-persistent", "~> 4.0.4"
+  spec.add_dependency "net-http-persistent", ">= 4.0.4", "< 5"
 end

spec/faraday/adapter/net_http_persistent_spec.rb

@@ -37,8 +37,7 @@
 
     http = adapter.send(:connection, url: url, request: {})
 
-    # `pool` is only present in net_http_persistent >= 3.0
-    expect(http.pool.size).to eq(5) if http.respond_to?(:pool)
+    expect(http.pool.size).to eq(5)
   end
 
   it "allows to set verify_hostname in SSL settings to false" do
@@ -49,8 +48,7 @@
     http = adapter.send(:connection, url: url, request: {})
     adapter.send(:configure_ssl, http, verify_hostname: false)
 
-    # `verify_hostname` is only present in net_http_persistent >= 4.0.4
-    expect(http.verify_hostname).to eq(false) if http.respond_to?(:verify_hostname)
+    expect(http.verify_hostname).to eq(false)
   end
 
   context "min_version" do
@@ -62,8 +60,7 @@
       http = adapter.send(:connection, url: url, request: {})
       adapter.send(:configure_ssl, http, min_version: :TLS1_2)
 
-      # `min_version` is only present in net_http_persistent >= 3.1
-      expect(http.min_version).to eq(:TLS1_2) if http.respond_to?(:min_version)
+      expect(http.min_version).to eq(:TLS1_2)
     end
   end
 end