Fix tests that rely on stubbed table printer output

command/alias.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/MakeNowJust/heredoc"
+	"github.com/cli/cli/pkg/iostreams"
 	"github.com/cli/cli/utils"
 	"github.com/google/shlex"
 	"github.com/spf13/cobra"
@@ -166,8 +167,9 @@ func aliasList(cmd *cobra.Command, args []string) error {
 		return nil
 	}
 
-	// TODO: connect to per-command io streams
-	tp := utils.NewTablePrinter(defaultStreams)
+	tp := utils.NewTablePrinter(&iostreams.IOStreams{
+		Out: cmd.OutOrStdout(),
+	})
 
 	aliasMap := aliasCfg.All()
 	keys := []string{}

command/issue.go

@@ -14,6 +14,7 @@ import (
 	"github.com/cli/cli/pkg/cmd/pr/shared"
 	"github.com/cli/cli/pkg/cmdutil"
 	"github.com/cli/cli/pkg/githubtemplate"
+	"github.com/cli/cli/pkg/iostreams"
 	"github.com/cli/cli/pkg/text"
 	"github.com/cli/cli/utils"
 	"github.com/spf13/cobra"
@@ -548,8 +549,9 @@ func issueCreate(cmd *cobra.Command, args []string) error {
 }
 
 func printIssues(w io.Writer, prefix string, totalCount int, issues []api.Issue) {
-	// TODO: accept io streams via argument
-	table := utils.NewTablePrinter(defaultStreams)
+	io := &iostreams.IOStreams{Out: w}
+	io.SetStdoutTTY(utils.IsTerminal(w))
+	table := utils.NewTablePrinter(io)
 	for _, issue := range issues {
 		issueNum := strconv.Itoa(issue.Number)
 		if table.IsTTY() {