Fix #1219 Net::HTTP still uses env proxy

spec/support/shared_examples/request_method.rb

@@ -1,5 +1,18 @@
 # frozen_string_literal: true
 
+shared_examples 'proxy examples' do
+  it 'handles requests with proxy' do
+    res = conn.public_send(http_method, '/')
+    expect(res.status).to eq(200)
+  end
+
+  it 'handles proxy failures' do
+    request_stub.to_return(status: 407)
+
+    expect { conn.public_send(http_method, '/') }.to raise_error(Faraday::ProxyAuthError)
+  end
+end
+
 shared_examples 'a request method' do |http_method|
   let(:query_or_body) { method_with_body?(http_method) ? :body : :query }
   let(:response) { conn.public_send(http_method, '/') }
@@ -223,16 +236,7 @@
       conn_options[:proxy] = 'http://google.co.uk'
     end
 
-    it 'handles requests with proxy' do
-      res = conn.public_send(http_method, '/')
-      expect(res.status).to eq(200)
-    end
-
-    it 'handles proxy failures' do
-      request_stub.to_return(status: 407)
-
-      expect { conn.public_send(http_method, '/') }.to raise_error(Faraday::ProxyAuthError)
-    end
+    include_examples 'proxy examples'
   end
 
   context 'when http_proxy env variable is set' do
@@ -244,15 +248,14 @@
       end
     end
 
-    it 'handles requests with proxy' do
-      res = conn.public_send(http_method, '/')
-      expect(res.status).to eq(200)
-    end
+    include_examples 'proxy examples'
 
-    it 'handles proxy failures' do
-      request_stub.to_return(status: 407)
+    context 'when the env proxy is ignored' do
+      around do |example|
+        with_env_proxy_disabled(&example)
+      end
 
-      expect { conn.public_send(http_method, '/') }.to raise_error(Faraday::ProxyAuthError)
+      include_examples 'proxy examples'
     end
   end
 end