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test: ArrayStack 테스트 코드 peek도 추가
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yoonexample/src/test/java/stack/StackTest.java

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@@ -47,10 +47,15 @@ class StackTest {
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assertThat(stack).isNotNull();
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assertThat(stack.isEmpty()).isFalse();
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assertThat(stack.size()).isEqualTo(5);
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assertThat(stack.peek()).isEqualTo(5);
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assertThat(stack.pop()).isEqualTo(5);
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assertThat(stack.peek()).isEqualTo(4);
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assertThat(stack.pop()).isEqualTo(4);
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assertThat(stack.peek()).isEqualTo(3);
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assertThat(stack.pop()).isEqualTo(3);
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assertThat(stack.peek()).isEqualTo(2);
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assertThat(stack.pop()).isEqualTo(2);
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assertThat(stack.peek()).isEqualTo(1);
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assertThat(stack.pop()).isEqualTo(1);
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assertThat(stack.isEmpty()).isTrue();
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assertThat(stack.size()).isEqualTo(0);

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