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package hm
import (
"fmt"
"testing"
)
var subsTests = []struct {
op string
tv TypeVariable
t Type
ok bool
size int
}{
{"get", TypeVariable('a'), nil, false, 0},
{"add", TypeVariable('a'), proton, true, 1},
{"get", TypeVariable('a'), proton, true, 1},
{"add", TypeVariable('a'), neutron, true, 1},
{"get", TypeVariable('a'), neutron, true, 1},
{"rem", TypeVariable('b'), nil, false, 1},
{"rem", TypeVariable('a'), nil, false, 0},
{"add", TypeVariable('a'), proton, true, 1},
{"add", TypeVariable('b'), proton, true, 2},
{"add", TypeVariable('c'), proton, true, 3},
}
func testSubs(t *testing.T, sub Subs) {
var T Type
var ok bool
for _, sts := range subsTests {
switch sts.op {
case "get":
if T, ok = sub.Get(sts.tv); ok != sts.ok {
t.Errorf("Expected Get to return %t. Got a value of %v instead", sts.ok, T)
}
case "add":
sub = sub.Add(sts.tv, sts.t)
case "rem":
sub = sub.Remove(sts.tv)
}
if sub.Size() != sts.size {
t.Errorf("Inconsistent size. Want %d. Got %d", sts.size, sub.Size())
}
}
// Iter
correct := []Substitution{
{TypeVariable('a'), proton},
{TypeVariable('b'), proton},
{TypeVariable('c'), proton},
}
for _, s := range sub.Iter() {
var found bool
for _, c := range correct {
if s.T == c.T && s.Tv == c.Tv {
found = true
break
}
}
if !found {
t.Errorf("Testing of %T: cannot find %v in Range", sub, s)
}
}
// Clone
cloned := sub.Clone()
cloned = cloned.Add(TypeVariable('a'), photon)
gt, ok := sub.Get(TypeVariable('a'))
if !ok {
t.Errorf("Expected the key 'a' to be found")
}
if gt == photon {
t.Errorf("Mutable cloning found")
}
}
func TestSliceSubs(t *testing.T) {
var sub Subs
sub = newSliceSubs()
if sub.Size() != 0 {
t.Error("Expected a size of 0")
}
sub = newSliceSubs(5)
if cap(sub.(*sSubs).s) != 5 {
t.Error("Expected a cap of 5")
}
if sub.Size() != 0 {
t.Error("Expected a size of 0")
}
testSubs(t, sub)
// Format for completeness sake
sub = newSliceSubs(2)
sub = sub.Add('a', proton)
sub = sub.Add('b', neutron)
if fmt.Sprintf("%v", sub) != "{a: proton, b: neutron}" {
t.Errorf("Format of sub is wrong. Got %q instead", sub)
}
}
func TestMapSubs(t *testing.T) {
var sub Subs
sub = make(mSubs)
if sub.Size() != 0 {
t.Error("Expected a size of 0")
}
testSubs(t, sub)
}
var composeTests = []struct {
a Subs
b Subs
expected Subs
}{
{mSubs{'a': proton}, &sSubs{[]Substitution{{'b', neutron}}}, &sSubs{[]Substitution{{'a', proton}, {'b', neutron}}}},
{&sSubs{[]Substitution{{'b', neutron}}}, mSubs{'a': proton}, mSubs{'a': proton, 'b': neutron}},
{mSubs{'a': proton, 'b': neutron}, &sSubs{[]Substitution{{'b', neutron}}}, &sSubs{[]Substitution{{'a', proton}, {'b', neutron}}}},
{mSubs{'a': proton, 'b': TypeVariable('a')}, &sSubs{[]Substitution{{'b', neutron}}}, &sSubs{[]Substitution{{'a', proton}, {'b', proton}}}},
{mSubs{'a': proton}, &sSubs{[]Substitution{{'b', TypeVariable('a')}}}, &sSubs{[]Substitution{{'a', proton}, {'b', proton}}}},
}
func TestCompose(t *testing.T) {
for i, cts := range composeTests {
subs := compose(cts.a, cts.b)
for _, v := range cts.expected.Iter() {
if T, ok := subs.Get(v.Tv); !ok {
t.Errorf("Test %d: Expected TypeVariable %v to be in subs", i, v.Tv)
} else if T != v.T {
t.Errorf("Test %d: Expected replacement to be %v. Got %v instead", i, v.T, T)
}
}
}
}
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