Add default and per-controller max-concurrent-reconciles flags (#4626)

Signed-off-by: KR Ravindra <42912207+KR-Ravindra@users.noreply.github.com>

controllers/actions.github.com/options_test.go

@@ -0,0 +1,43 @@
+package actionsgithubcom
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestOptionsResolve(t *testing.T) {
+	t.Parallel()
+
+	t.Run("unset per-controller values fall back to the default", func(t *testing.T) {
+		got := OptionsWithDefault().Resolve()
+		assert.Equal(t, 1, got.DefaultMaxConcurrentReconciles)
+		assert.Equal(t, 1, got.AutoscalingRunnerSetMaxConcurrentReconciles)
+		assert.Equal(t, 1, got.AutoscalingListenerMaxConcurrentReconciles)
+		assert.Equal(t, 1, got.EphemeralRunnerSetMaxConcurrentReconciles)
+		assert.Equal(t, 1, got.EphemeralRunnerMaxConcurrentReconciles)
+	})
+
+	t.Run("a default of zero or less is replaced by 1", func(t *testing.T) {
+		for _, n := range []int{0, -1} {
+			opts := Options{DefaultMaxConcurrentReconciles: n}
+			got := opts.Resolve()
+			assert.Equal(t, 1, got.DefaultMaxConcurrentReconciles)
+			assert.Equal(t, 1, got.AutoscalingRunnerSetMaxConcurrentReconciles)
+			assert.Equal(t, 1, got.AutoscalingListenerMaxConcurrentReconciles)
+			assert.Equal(t, 1, got.EphemeralRunnerSetMaxConcurrentReconciles)
+			assert.Equal(t, 1, got.EphemeralRunnerMaxConcurrentReconciles)
+		}
+	})
+
+	t.Run("a changed default applies to every unset controller", func(t *testing.T) {
+		opts := OptionsWithDefault()
+		opts.DefaultMaxConcurrentReconciles = 4
+		opts.EphemeralRunnerMaxConcurrentReconciles = 20
+		got := opts.Resolve()
+		assert.Equal(t, 4, got.AutoscalingRunnerSetMaxConcurrentReconciles)
+		assert.Equal(t, 4, got.AutoscalingListenerMaxConcurrentReconciles)
+		assert.Equal(t, 4, got.EphemeralRunnerSetMaxConcurrentReconciles)
+		assert.Equal(t, 20, got.EphemeralRunnerMaxConcurrentReconciles)
+	})
+}