// TestStringStackPushPop tests the core string stack methods.
func TestStringStackPushPop(t *testing.T) {
assert := audit.NewTestingAssertion(t, true)
// Start with an empty stack.
sa := collections.NewStringStack()
assert.Length(sa, 0)
sa.Push("foo")
sa.Push("bar")
assert.Length(sa, 2)
sa.Push()
assert.Length(sa, 2)
sa.Push("baz", "yadda")
assert.Length(sa, 4)
v, err := sa.Peek()
assert.Nil(err)
assert.Equal(v, "yadda")
v, err = sa.Pop()
assert.Nil(err)
assert.Equal(v, "yadda")
assert.Length(sa, 3)
// Start with a filled stack.
sb := collections.NewStringStack("a", "b", "c")
assert.Length(sb, 3)
v, err = sb.Pop()
assert.Nil(err)
assert.Equal(v, "c")
assert.Length(sb, 2)
v, err = sb.Pop()
assert.Nil(err)
assert.Equal(v, "b")
assert.Length(sb, 1)
v, err = sb.Pop()
assert.Nil(err)
assert.Equal(v, "a")
assert.Length(sb, 0)
// Popping the last one returns an error.
v, err = sb.Pop()
assert.ErrorMatch(err, ".*collection is empty")
// And now deflate the first one.
sa.Deflate()
assert.Length(sa, 0)
}
// BeginTagNode implements the sml.Builder interface.
func (b *configBuilder) BeginTagNode(tag string) error {
switch {
case b.values == nil && tag != "config":
return errors.New(ErrIllegalConfigSource, errorMessages, `does not start with "config" node`)
case b.values == nil:
b.stack = collections.NewStringStack(tag)
b.values = collections.NewKeyStringValueTree(tag, "", false)
default:
b.stack.Push(tag)
changer := b.values.Create(b.stack.All()...)
if changer.Error() != nil {
return errors.New(ErrIllegalConfigSource, errorMessages, changer.Error())
}
}
return nil
}
// BeginTagNode implements the Builder interface.
func (tb *KeyStringValueTreeBuilder) BeginTagNode(tag string) error {
if tb.done {
return errors.New(ErrBuilder, errorMessages, "building is already done")
}
switch {
case tb.tree == nil:
tb.stack = collections.NewStringStack(tag)
tb.tree = collections.NewKeyStringValueTree(tag, "", false)
default:
tb.stack.Push(tag)
changer := tb.tree.Create(tb.stack.All()...)
if err := changer.Error(); err != nil {
return errors.Annotate(err, ErrBuilder, errorMessages)
}
}
return nil
}