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// Copyright 2017 Northern.tech AS
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package scopestack
import mt "github.com/mendersoftware/mendertesting"
import "testing"
func TestPushPop(t *testing.T) {
var s ScopeStack
s.Push("1")
mt.AssertTrue(t, s.Pop().(string) == "1")
}
func TestTooMuchPopping(t *testing.T) {
var s ScopeStack
s.Push("1")
mt.AssertTrue(t, s.Pop().(string) == "1")
defer func() {
if recover() == nil {
t.Fatal("Unbalanced Pop() did not panic.")
}
}()
mt.AssertTrue(t, s.Pop().(string) == "should never happen")
t.Fatal("Should never get here")
}
func TestPopInDefer(t *testing.T) {
var s ScopeStack
defer s.Pop()
s.Push("1")
}
func TestPushPopNotInSameFunction(t *testing.T) {
var s ScopeStack
func() {
s.Push("1")
}()
defer func() {
if recover() == nil {
t.Fatal("Pop() should have panicked when used in a " +
"different function than Push()")
}
}()
s.Pop()
t.Fatal("Should never get here")
}
func pushScopeStackDirectly(s *ScopeStack) {
s.Push("1")
}
func pushScopeStackIndirectly(s *ScopeStack) {
pushScopeStackDirectly(s)
}
func popScopeStackDirectly(s *ScopeStack) {
s.Pop()
}
func popScopeStackIndirectly(s *ScopeStack) {
popScopeStackDirectly(s)
}
func TestDifferentScopeDistance(t *testing.T) {
var s *ScopeStack = NewScopeStack(1)
pushScopeStackDirectly(s)
popScopeStackDirectly(s)
func() {
// With scope distance 1, it should not reach all the way out
// to this function, and should therefore fail because Push()
// and Pop() are in different functions.
pushScopeStackIndirectly(s)
defer func() {
if recover() == nil {
t.Fatal("Should have panicked because " +
"scope stack distance should point " +
"to this function")
}
}()
popScopeStackIndirectly(s)
t.Fatal("Should never get here")
}()
// Now change the scope distance to 2. Now it should reach all the way
// out to this test function.
s = NewScopeStack(2)
pushScopeStackIndirectly(s)
popScopeStackIndirectly(s)
}
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