#919 - io.ebean package initial

src/test/java/io/ebeaninternal/server/util/ArrayStackTest.java

@@ -0,0 +1,103 @@
+package io.ebeaninternal.server.util;
+
+import org.junit.Test;
+
+import java.util.EmptyStackException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+public class ArrayStackTest {
+
+  @Test
+  public void testPushPop() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+    stack.push("1");
+    stack.push("2");
+    stack.push("3");
+
+    assertThat(stack.pop()).isEqualTo("3");
+    assertThat(stack.pop()).isEqualTo("2");
+    assertThat(stack.pop()).isEqualTo("1");
+  }
+
+  @Test
+  public void testPushPop_given_stackInitialSizeExceeded() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>(2);
+    stack.push("1");
+    stack.push("2");
+    stack.push("3");
+
+    assertThat(stack.pop()).isEqualTo("3");
+    assertThat(stack.pop()).isEqualTo("2");
+    assertThat(stack.pop()).isEqualTo("1");
+  }
+
+  @Test(expected = EmptyStackException.class)
+  public void testPop_given_emptyStack_throws() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+    stack.pop();
+  }
+
+  @Test(expected = EmptyStackException.class)
+  public void testPeek_given_empty_throws() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+
+    assertThat(stack.peek());
+  }
+
+  @Test
+  public void testPeek_given_notEmpty() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+    stack.push("1");
+    assertThat(stack.peek()).isEqualTo("1");
+  }
+
+  @Test
+  public void testPeekWithNull() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+
+    assertThat(stack.peekWithNull()).isNull();
+
+    stack.push("1");
+    assertThat(stack.peekWithNull()).isEqualTo("1");
+  }
+
+  @Test
+  public void testIsEmpty() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+    assertThat(stack.isEmpty()).isTrue();
+
+    stack.push("1");
+    assertThat(stack.isEmpty()).isFalse();
+  }
+
+  @Test
+  public void testSize() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+    assertThat(stack.size()).isEqualTo(0);
+
+    stack.push("1");
+    assertThat(stack.size()).isEqualTo(1);
+    stack.push("w");
+    assertThat(stack.size()).isEqualTo(2);
+  }
+
+  @Test
+  public void testContains() throws Exception {
+
+    ArrayStack<String> stack = new ArrayStack<>();
+    stack.push("1");
+
+    assertThat(stack.contains("1")).isTrue();
+    assertThat(stack.contains("2")).isFalse();
+  }
+}