.

go/internal/xtracing/tracetest/example_test.go

@@ -156,6 +156,12 @@ func TestDeadlock(t *testing.T) {
 	}, "-tracetest.deadtime=0.5s")
 }
 
+
+// XXX race bug with sleep caught only by delay injection
+
+
+// other tests
+
 // TestExpectType demonstrates Expect asserting with "unexpected event type".
 func TestExpectType(t *testing.T) {
 	verify(t, func(t *tracetest.T) {
@@ -172,10 +178,25 @@ func TestExpectType(t *testing.T) {
 	})
 }
 
-// XXX race bug with sleep caught only by delay injection
+// TestExpectValue demonstrates Expect asserting with "unexpected event value".
+func TestExpectValue(t *testing.T) {
+	verify(t, func(t *tracetest.T) {
+		var wg sync.WaitGroup
+		defer wg.Wait()
+		wg.Add(1)
+
+		go func() { // thread 1
+			defer wg.Done()
+			hi("T1·A")
+		}()
+
+		t.Expect("t1", eventHello("T1·B"))
+	})
+}
+
 
 
-// --------
+// ----------------------------------------
 
 // verifyInSubprocess runs f in subprocess and verifies that its output matches testOutput.
 func verifyInSubprocess(t *testing.T, f func(t *testing.T), targvExtra ...string) {
@@ -260,10 +281,14 @@ var testExpectMap = map[string]testExpect{
 
 	"TestExpectType": {1,
 `--- FAIL: TestExpectType (<TIME>)
-    example_test.go:171: t1: expect: tracetest_test.eventHello:  got tracetest_test.eventHi T1·A
-    example_test.go:171: test shutdown: #streams: 1,  #(pending events): 0
+    example_test.go:177: t1: expect: tracetest_test.eventHello:  got tracetest_test.eventHi T1·A
+    example_test.go:177: test shutdown: #streams: 1,  #(pending events): 0
         # t1
 
     tracetest.go:<LINE>: t1: send: unexpected event type
+`},
+
+	"TestExpectValue": {1,
+`
 `},
 }