interop/xds: improve error message (#6614)

Aditya-Sood · web-flow · commit 57dcb71f02ed · 2023-09-11T09:32:56.000-07:00
diff --git a/interop/xds/custom_lb_test.go b/interop/xds/custom_lb_test.go
@@ -66,7 +66,7 @@ func (s) TestCustomLB(t *testing.T) {
 			}
 			rpcBMD := md.Get("rpc-behavior")
 			if len(rpcBMD) != 1 {
-				errCh.Send(errors.New("only one value received for metadata key rpc-behavior"))
+				errCh.Send(fmt.Errorf("received %d values for metadata key rpc-behavior, want 1", len(rpcBMD)))
 				return &testpb.SimpleResponse{}, nil
 			}
 			wantVal := "error-code-0"

Original file line number	Diff line number	Diff line change
`@@ -66,7 +66,7 @@ func (s) TestCustomLB(t *testing.T) {`
`66`	`66`	`}`
`67`	`67`	`rpcBMD := md.Get("rpc-behavior")`
`68`	`68`	`if len(rpcBMD) != 1 {`
`69`		`- errCh.Send(errors.New("only one value received for metadata key rpc-behavior"))`
	`69`	`+ errCh.Send(fmt.Errorf("received %d values for metadata key rpc-behavior, want 1", len(rpcBMD)))`
`70`	`70`	`return &testpb.SimpleResponse{}, nil`
`71`	`71`	`}`
`72`	`72`	`wantVal := "error-code-0"`