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// Tideland Go Library - Collections - Stacks - Unit Tests
//
// Copyright (C) 2015-2017 Frank Mueller / Tideland / Oldenburg / Germany
//
// All rights reserved. Use of this source code is governed
// by the new BSD license.
package collections_test
//--------------------
// IMPORTS
//--------------------
import (
"testing"
"github.com/tideland/golib/audit"
"github.com/tideland/golib/collections"
)
//--------------------
// TESTS
//--------------------
// TestStackPushPop tests the core stack methods.
func TestStackPushPop(t *testing.T) {
assert := audit.NewTestingAssertion(t, true)
// Start with an empty stack.
sa := collections.NewStack()
assert.Length(sa, 0)
sa.Push("foo")
sa.Push(4711)
assert.Length(sa, 2)
sa.Push()
assert.Length(sa, 2)
sa.Push(false, 8.15)
assert.Length(sa, 4)
v, err := sa.Peek()
assert.Nil(err)
assert.Equal(v, 8.15)
v, err = sa.Pop()
assert.Nil(err)
assert.Equal(v, 8.15)
assert.Length(sa, 3)
// Start with a filled stack.
sb := collections.NewStack("a", true, 4711)
assert.Length(sb, 3)
v, err = sb.Pop()
assert.Nil(err)
assert.Equal(v, 4711)
assert.Length(sb, 2)
v, err = sb.Pop()
assert.Nil(err)
assert.Equal(v, true)
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.
_, err = sb.Pop()
assert.ErrorMatch(err, ".*collection is empty")
// And now deflate the first one.
sa.Deflate()
assert.Length(sa, 0)
}
// TestStackAll tests the retrieval of all values.
func TestStackAll(t *testing.T) {
assert := audit.NewTestingAssertion(t, true)
s := collections.NewStack(1, "b", 3.0, true)
all := s.All()
assert.Equal(all, []interface{}{1, "b", 3.0, true})
all = s.AllReverse()
assert.Equal(all, []interface{}{true, 3.0, "b", 1})
}
// 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.
_, err = sb.Pop()
assert.ErrorMatch(err, ".*collection is empty")
// And now deflate the first one.
sa.Deflate()
assert.Length(sa, 0)
}
// EOF
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