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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package base
import (
"bytes"
"internal/bisect"
"strings"
"testing"
)
func TestHashDebugGossahashY(t *testing.T) {
hd := NewHashDebug("GOSSAHASH", "y", new(bytes.Buffer))
if hd == nil {
t.Errorf("NewHashDebug should not return nil for GOSSASHASH=y")
}
if !hd.MatchPkgFunc("anything", "anyfunc", nil) {
t.Errorf("NewHashDebug should return yes for everything for GOSSASHASH=y")
}
}
func TestHashDebugGossahashN(t *testing.T) {
hd := NewHashDebug("GOSSAHASH", "n", new(bytes.Buffer))
if hd == nil {
t.Errorf("NewHashDebug should not return nil for GOSSASHASH=n")
}
if hd.MatchPkgFunc("anything", "anyfunc", nil) {
t.Errorf("NewHashDebug should return no for everything for GOSSASHASH=n")
}
}
func TestHashDebugGossahashEmpty(t *testing.T) {
hd := NewHashDebug("GOSSAHASH", "", nil)
if hd != nil {
t.Errorf("NewHashDebug should return nil for GOSSASHASH=\"\"")
}
}
func TestHashDebugMagic(t *testing.T) {
hd := NewHashDebug("FOOXYZZY", "y", nil)
hd0 := NewHashDebug("FOOXYZZY0", "n", nil)
if hd == nil {
t.Errorf("NewHashDebug should have succeeded for FOOXYZZY")
}
if hd0 == nil {
t.Errorf("NewHashDebug should have succeeded for FOOXYZZY0")
}
}
func TestHash(t *testing.T) {
h0 := bisect.Hash("bar", "0")
h1 := bisect.Hash("bar", "1")
t.Logf(`These values are used in other tests: Hash("bar", "0")=%#64b, Hash("bar", "1")=%#64b`, h0, h1)
if h0 == h1 {
t.Errorf("Hashes 0x%x and 0x%x should differ", h0, h1)
}
}
func TestHashMatch(t *testing.T) {
b := new(bytes.Buffer)
hd := NewHashDebug("GOSSAHASH", "v1110", b)
check := hd.MatchPkgFunc("bar", "0", func() string { return "note" })
msg := b.String()
t.Logf("message was '%s'", msg)
if !check {
t.Errorf("GOSSAHASH=1110 should have matched for 'bar', '0'")
}
wantPrefix(t, msg, "bar.0: note [bisect-match ")
wantContains(t, msg, "\nGOSSAHASH triggered bar.0: note ")
}
func TestYMatch(t *testing.T) {
b := new(bytes.Buffer)
hd := NewHashDebug("GOSSAHASH", "vy", b)
check := hd.MatchPkgFunc("bar", "0", nil)
msg := b.String()
t.Logf("message was '%s'", msg)
if !check {
t.Errorf("GOSSAHASH=y should have matched for 'bar', '0'")
}
wantPrefix(t, msg, "bar.0 [bisect-match ")
wantContains(t, msg, "\nGOSSAHASH triggered bar.0 010100100011100101011110")
}
func TestNMatch(t *testing.T) {
b := new(bytes.Buffer)
hd := NewHashDebug("GOSSAHASH", "vn", b)
check := hd.MatchPkgFunc("bar", "0", nil)
msg := b.String()
t.Logf("message was '%s'", msg)
if check {
t.Errorf("GOSSAHASH=n should NOT have matched for 'bar', '0'")
}
wantPrefix(t, msg, "bar.0 [DISABLED] [bisect-match ")
wantContains(t, msg, "\nGOSSAHASH triggered bar.0 [DISABLED] 010100100011100101011110")
}
func TestHashNoMatch(t *testing.T) {
b := new(bytes.Buffer)
hd := NewHashDebug("GOSSAHASH", "01110", b)
check := hd.MatchPkgFunc("bar", "0", nil)
msg := b.String()
t.Logf("message was '%s'", msg)
if check {
t.Errorf("GOSSAHASH=001100 should NOT have matched for 'bar', '0'")
}
if msg != "" {
t.Errorf("Message should have been empty, instead %s", msg)
}
}
func TestHashSecondMatch(t *testing.T) {
b := new(bytes.Buffer)
hd := NewHashDebug("GOSSAHASH", "01110/11110", b)
check := hd.MatchPkgFunc("bar", "0", nil)
msg := b.String()
t.Logf("message was '%s'", msg)
if !check {
t.Errorf("GOSSAHASH=001100, GOSSAHASH0=0011 should have matched for 'bar', '0'")
}
wantContains(t, msg, "\nGOSSAHASH0 triggered bar")
}
func wantPrefix(t *testing.T, got, want string) {
t.Helper()
if !strings.HasPrefix(got, want) {
t.Errorf("want prefix %q, got:\n%s", want, got)
}
}
func wantContains(t *testing.T, got, want string) {
t.Helper()
if !strings.Contains(got, want) {
t.Errorf("want contains %q, got:\n%s", want, got)
}
}