Event comparison during unit testing does not match the expected result

[l-qing]

Expected Behavior

Using the original event message matches correctly.

Actual Behavior

Using the original event message did not successfully match.

Steps to Reproduce the Problem

1. Code:
   

   pipeline/pkg/reconciler/pipelinerun/pipelinerun_test.go

   Lines 1612 to 1616 in e38d112

   	wantEvents := []string{
   	"Normal Started",
   	"Normal Running Tasks Completed: 0 \\(Failed: 0, Cancelled 0\\), Incomplete: 1, Skipped: 0",
   	}
   	_, clients := prt.reconcileRun("test", prName, wantEvents, false)

2. Escaping () is necessary to matc
3. If equal matching is supported, escaping is not necessary. Can be written as:
   Normal Running Tasks Completed: 0 (Failed: 0, Cancelled 0), Incomplete: 1, Skipped: 0

Additional Info

• Tekton Pipeline version:
  771fb66