func (sf *stringFrag) calcDiff(that diffFragment) int {
switch g := that.(type) {
case *stringFrag:
s1, s2 := strings.TrimSpace(sf.source), strings.TrimSpace(g.source)
if len(s1)+len(s2) == 0 {
return 0
} // if
wt := sf.weight + g.weight
return ed.String(s1, s2) * wt / mathp.MaxI(len(s1), len(s2))
} // switch
return sf.Weight() + that.Weight()
}
func AssertStringsEqual(t *testing.T, name string, act, exp []string) {
if villa.StringSlice(exp).Equals(act) {
return
}
t.Errorf("%s unexpected(exp: %d lines, act %d lines)!", name, len(exp), len(act))
t.Logf("exp --- act +++")
t.Logf("Difference:")
_, matA, matB := ed.EditDistanceFFull(len(exp), len(act), func(iA, iB int) int {
sa, sb := exp[iA], act[iB]
if sa == sb {
return 0
}
return ed.String(sa, sb)
}, func(iA int) int {
return len(exp[iA]) + 1
}, func(iB int) int {
return len(act[iB]) + 1
})
for i, j := 0, 0; i < len(exp) || j < len(act); {
switch {
case j >= len(act) || i < len(exp) && matA[i] < 0:
t.Logf("--- %3d: %s", i+1, showText(exp[i]))
i++
case i >= len(exp) || j < len(act) && matB[j] < 0:
t.Logf("+++ %3d: %s", j+1, showText(act[j]))
j++
default:
if exp[i] != act[j] {
t.Logf("--- %3d: %s", i+1, showText(exp[i]))
t.Logf("+++ %3d: %s", j+1, showText(act[j]))
} // else
i++
j++
}
} // for i, j
}
func DiffOfStrings(a, b string, mx int) int {
if a == b {
return 0
} // if
return ed.String(a, b) * mx / max(len(a), len(b))
}