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terminal: show message if there are no vars/locals/args

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When the vars, locals, or args commands return no results, nothing is

printed out to the terminal. This commit makes these commands print a

message like `(no locals)` when there is nothing to show. This feedback

is more descriptive of what is being returned than an empty string.
This commit is contained in:
Wesley Merkel
2016-04-06 09:26:10 -07:00
committed by Derek Parker
parent ae7abe1a9d
commit e60942a39d
2 changed files with 21 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
terminal/command.go
View File

@ -682,7 +682,7 @@ func args(t *Term, ctx callContext, filter string) ([]string, error) {
if err != nil { if err != nil {
return nil, err return nil, err
} }
return filterVariables(vars, filter), nil return describeNoVars("args", filterVariables(vars, filter)), nil
} }
func locals(t *Term, ctx callContext, filter string) ([]string, error) { func locals(t *Term, ctx callContext, filter string) ([]string, error) {
@ -690,7 +690,7 @@ func locals(t *Term, ctx callContext, filter string) ([]string, error) {
if err != nil { if err != nil {
return nil, err return nil, err
} }
return filterVariables(locals, filter), nil return describeNoVars("locals", filterVariables(locals, filter)), nil
} }
func vars(t *Term, ctx callContext, filter string) ([]string, error) { func vars(t *Term, ctx callContext, filter string) ([]string, error) {
@ -698,7 +698,7 @@ func vars(t *Term, ctx callContext, filter string) ([]string, error) {
if err != nil { if err != nil {
return nil, err return nil, err
} }
return filterVariables(vars, filter), nil return describeNoVars("vars", filterVariables(vars, filter)), nil
} }
func regs(t *Term, ctx callContext, args string) error { func regs(t *Term, ctx callContext, args string) error {
@ -1153,3 +1153,10 @@ func formatBreakpointLocation(bp *api.Breakpoint) string {
} }
return fmt.Sprintf("%#v for %s:%d", bp.Addr, p, bp.Line) return fmt.Sprintf("%#v for %s:%d", bp.Addr, p, bp.Line)
} }
func describeNoVars(varType string, data []string) []string {
if len(data) == 0 {
return []string{fmt.Sprintf("(no %s)", varType)}
}
return data
}

12
terminal/command_test.go
View File

@ -269,7 +269,7 @@ func TestScopePrefix(t *testing.T) {
if fid < 0 { if fid < 0 {
t.Fatalf("Could not find frame for goroutine %d: %v", gid, stackOut) t.Fatalf("Could not find frame for goroutine %d: %v", gid, stackOut)
} }
term.AssertExec(fmt.Sprintf("goroutine %d frame %d locals", gid, fid), "") term.AssertExec(fmt.Sprintf("goroutine %d frame %d locals", gid, fid), "(no locals)\n")
argsOut := strings.Split(term.MustExec(fmt.Sprintf("goroutine %d frame %d args", gid, fid)), "\n") argsOut := strings.Split(term.MustExec(fmt.Sprintf("goroutine %d frame %d args", gid, fid)), "\n")
if len(argsOut) != 4 || argsOut[3] != "" { if len(argsOut) != 4 || argsOut[3] != "" {
t.Fatalf("Wrong number of arguments in goroutine %d frame %d: %v", gid, fid, argsOut) t.Fatalf("Wrong number of arguments in goroutine %d frame %d: %v", gid, fid, argsOut)
@ -347,3 +347,13 @@ func TestOnPrefix(t *testing.T) {
} }
}) })
} }
func TestNoVars(t *testing.T) {
withTestTerminal("locationsUpperCase", t, func(term *FakeTerminal) {
term.MustExec("b main.main")
term.MustExec("continue")
term.AssertExec("args", "(no args)\n")
term.AssertExec("locals", "(no locals)\n")
term.AssertExec("vars filterThatMatchesNothing", "(no vars)\n")
})
}