Add Appsignal.configure .env? helper (#1333)

.changesets/add-appsignal-configure-env--helper.md

@@ -0,0 +1,22 @@
+---
+bump: patch
+type: add
+---
+
+Add `Appsignal.configure` context `env?` helper method. Check if the loaded environment matches the given environment using the `.env?(:env_name)` helper.
+
+Example:
+
+```ruby
+Appsignal.configure do |config|
+  # Symbols work as the argument
+  if config.env?(:production)
+    config.ignore_actions << "My production action"
+  end
+
+  # Strings also work as the argument
+  if config.env?("staging")
+    config.ignore_actions << "My staging action"
+  end
+end
+```

lib/appsignal/config.rb

@@ -609,6 +609,15 @@ def env
         @config.env
       end
 
+      # Returns true if the given environment name matches the loaded
+      # environment name.
+      #
+      # @param given_env [String, Symbol]
+      # @return [TrueClass, FalseClass]
+      def env?(given_env)
+        env == given_env.to_s
+      end
+
       def activate_if_environment(*envs)
         self.active = envs.map(&:to_s).include?(env)
       end

spec/lib/appsignal/config_spec.rb

@@ -1367,6 +1367,18 @@ def log_file_path
       expect(dsl.env).to eq("production")
     end
 
+    describe "#env?" do
+      it "returns true if the env matches" do
+        expect(dsl.env?("production")).to be(true)
+        expect(dsl.env?(:production)).to be(true)
+      end
+
+      it "returns false if the env doesn't match" do
+        expect(dsl.env?("staging")).to be(false)
+        expect(dsl.env?(:staging)).to be(false)
+      end
+    end
+
     it "sets config options" do
       dsl.push_api_key = "my push key"
       dsl.ignore_actions = ["My ignored action"]