65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package runtimex
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import (
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"errors"
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"io"
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"testing"
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)
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func TestChanStackPushPop(t *testing.T) {
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stack := NewChanStack(2)
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if err := stack.Push("a"); err != nil {
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t.Fatalf("Push failed: %v", err)
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}
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if err := stack.Push("b"); err != nil {
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t.Fatalf("Push failed: %v", err)
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}
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if stack.Len() != 2 {
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t.Fatalf("expected len=2, got %d", stack.Len())
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}
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if stack.Free() != 0 {
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t.Fatalf("expected free=0, got %d", stack.Free())
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}
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first, err := stack.Pop()
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if err != nil {
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t.Fatalf("Pop failed: %v", err)
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}
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if first.(string) != "a" {
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t.Fatalf("unexpected first value: %v", first)
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}
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second, err := stack.Pop()
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if err != nil {
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t.Fatalf("Pop failed: %v", err)
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}
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if second.(string) != "b" {
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t.Fatalf("unexpected second value: %v", second)
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}
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}
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func TestChanStackTryPushFull(t *testing.T) {
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stack := NewChanStack(1)
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if err := stack.TryPush("a"); err != nil {
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t.Fatalf("TryPush should succeed on empty stack: %v", err)
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}
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if err := stack.TryPush("b"); !errors.Is(err, ErrStackFull) {
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t.Fatalf("TryPush should return ErrStackFull, got %v", err)
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}
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}
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func TestChanStackCloseBehavior(t *testing.T) {
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stack := NewChanStack(1)
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if err := stack.Close(); err != nil {
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t.Fatalf("Close should succeed first time: %v", err)
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}
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if err := stack.Close(); !errors.Is(err, ErrStackClosed) {
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t.Fatalf("Close should return ErrStackClosed on second call, got %v", err)
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}
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if err := stack.Push("x"); !errors.Is(err, io.EOF) {
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t.Fatalf("Push after close should return io.EOF, got %v", err)
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}
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if _, err := stack.Pop(); !errors.Is(err, io.EOF) {
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t.Fatalf("Pop after close should return io.EOF, got %v", err)
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}
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}
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