Ensure product name for tests is not overridden by custom build settings

CHANGELOG.md

@@ -34,6 +34,10 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
 
 ##### Bug Fixes
 
+* Ensure product name for tests is not overridden by custom build settings  
+  [Dimitris Koutsogiorgas](https://github.com/dnkoutso)
+  [#6766](https://github.com/CocoaPods/CocoaPods/pull/6766)
+
 * Do not use the same product name for test targets  
   [Dimitris Koutsogiorgas](https://github.com/dnkoutso)
   [#6762](https://github.com/CocoaPods/CocoaPods/pull/6762)

lib/cocoapods/installer/xcode/pods_project_generator/pod_target_installer.rb

@@ -179,10 +179,7 @@ module Pod
               platform = target.platform.name
               language = target.uses_swift? ? :swift : :objc
               native_test_target = project.new_target(product_type, name, platform, deployment_target, nil, language)
-
-              product_name = name
-              product = native_test_target.product_reference
-              product.name = product_name
+              native_test_target.product_reference.name = name
 
               target.user_build_configurations.each do |bc_name, type|
                 native_test_target.add_build_configuration(bc_name, type)
@@ -190,9 +187,13 @@ module Pod
 
               native_test_target.build_configurations.each do |configuration|
                 configuration.build_settings.merge!(custom_build_settings)
-                # target_installer will automatically add an empth `OTHER_LDFLAGS`. For test
+                # target_installer will automatically add an empty `OTHER_LDFLAGS`. For test
                 # targets those are set via a test xcconfig file instead.
                 configuration.build_settings.delete('OTHER_LDFLAGS')
+                # target_installer will automatically set the product name to the module name if the target
+                # requires frameworks. For tests we always use the test target name as the product name
+                # irrelevant to whether we use frameworks or not.
+                configuration.build_settings['PRODUCT_NAME'] = name
               end
 
               target.test_native_targets << native_test_target

spec/unit/installer/xcode/pods_project_generator/pod_target_installer_spec.rb

@@ -188,6 +188,9 @@ module Pod
                 native_test_target = @project.targets[1]
                 native_test_target.name.should == 'CoconutLib-Unit-Tests'
                 native_test_target.product_reference.name.should == 'CoconutLib-Unit-Tests'
+                native_test_target.build_configurations.each do |bc|
+                  bc.build_settings['PRODUCT_NAME'].should == 'CoconutLib-Unit-Tests'
+                end
                 native_test_target.symbol_type.should == :unit_test_bundle
                 @coconut_pod_target.test_native_targets.count.should == 1
               end