diff --git a/testable-core/src/test/java/com/alibaba/testable/core/tool/CollectionToolTest.java b/testable-core/src/test/java/com/alibaba/testable/core/tool/CollectionToolTest.java
index 125c876..69693b8 100644
--- a/testable-core/src/test/java/com/alibaba/testable/core/tool/CollectionToolTest.java
+++ b/testable-core/src/test/java/com/alibaba/testable/core/tool/CollectionToolTest.java
@@ -2,22 +2,128 @@ package com.alibaba.testable.core.tool;
 
 import org.junit.jupiter.api.Test;
 
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static com.alibaba.testable.core.tool.CollectionTool.*;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class CollectionToolTest {
 
     @Test
     void should_slice_array() {
-        Object[] args = new Object[]{"1", "2", "3", "4"};
-        Object[] slicedArgs = CollectionTool.slice(args, 1);
-        assertEquals(3, slicedArgs.length);
-        assertEquals("2", slicedArgs[0]);
-        assertEquals("3", slicedArgs[1]);
-        assertEquals("4", slicedArgs[2]);
-        slicedArgs = CollectionTool.slice(args, 1, 2);
-        assertEquals(2, slicedArgs.length);
-        assertEquals("2", slicedArgs[0]);
-        assertEquals("3", slicedArgs[1]);
+        String[] fullWords = arrayOf("this", "is", "a", "simple", "example");
+        String[] partOfWords = slice(fullWords, 1, 3);
+        assertEquals(3, partOfWords.length);
+        assertEquals("is", partOfWords[0]);
+        assertEquals("a", partOfWords[1]);
+        assertEquals("simple", partOfWords[2]);
+
+        Integer[] fibonacci = arrayOf(1, 1, 2, 3, 5, 8, 13, 21);
+        Integer[] partOfFibonacci = slice(fibonacci, 4);
+        assertEquals(4, partOfFibonacci.length);
+        assertEquals(5, partOfFibonacci[0]);
+        assertEquals(8, partOfFibonacci[1]);
+        assertEquals(13, partOfFibonacci[2]);
+        assertEquals(21, partOfFibonacci[3]);
+    }
+
+    @Test
+    void should_create_array() {
+        String[] manyWords = arrayOf("this", "is", "an", "example");
+        assertEquals(4, manyWords.length);
+        assertEquals("this", manyWords[0]);
+        assertEquals("is", manyWords[1]);
+        assertEquals("an", manyWords[2]);
+        assertEquals("example", manyWords[3]);
+
+        Double[] manyValues = arrayOf(1.0D, 2.0D, 3.0D);
+        assertEquals(3, manyValues.length);
+        assertEquals(1.0D, manyValues[0]);
+        assertEquals(2.0D, manyValues[1]);
+        assertEquals(3.0D, manyValues[2]);
+    }
+
+    @Test
+    void should_create_list() {
+        List<String> manyWords = listOf("this", "is", "an", "example");
+        assertEquals(4, manyWords.size());
+        assertEquals("this", manyWords.get(0));
+        assertEquals("is", manyWords.get(1));
+        assertEquals("an", manyWords.get(2));
+        assertEquals("example", manyWords.get(3));
+
+        List<Double> manyValues = listOf(1.0D, 2.0D, 3.0D);
+        assertEquals(3, manyValues.size());
+        assertEquals(1.0D, manyValues.get(0));
+        assertEquals(2.0D, manyValues.get(1));
+        assertEquals(3.0D, manyValues.get(2));
+    }
+
+    @Test
+    void should_create_set() {
+        Set<String> manyWords = setOf("this", "is", "an", "example");
+        assertEquals(4, manyWords.size());
+        assertTrue(manyWords.contains("this"));
+        assertTrue(manyWords.contains("is"));
+        assertTrue(manyWords.contains("an"));
+        assertTrue(manyWords.contains("example"));
+
+        Set<Double> manyValues = setOf(1.0D, 2.0D, 3.0D);
+        assertEquals(3, manyValues.size());
+        assertTrue(manyValues.contains(1.0D));
+        assertTrue(manyValues.contains(2.0D));
+        assertTrue(manyValues.contains(3.0D));
+    }
+
+    @Test
+    void should_create_map() {
+        Map<String, String> manyWords = mapOf(
+                entryOf("language", "java"),
+                entryOf("type", "unittest"),
+                entryOf("library", "testable")
+        );
+        assertEquals(3, manyWords.size());
+        assertEquals("java", manyWords.get("language"));
+        assertEquals("unittest", manyWords.get("type"));
+        assertEquals("testable", manyWords.get("library"));
+
+        Map<Integer, Double> manyValues = mapOf(
+                entryOf(1, 10.12D),
+                entryOf(2, 20.24D),
+                entryOf(3, 30.36D)
+        );
+        assertEquals(3, manyValues.size());
+        assertEquals(10.12D, manyValues.get(1));
+        assertEquals(20.24D, manyValues.get(2));
+        assertEquals(30.36D, manyValues.get(3));
+    }
+
+    @Test
+    void should_create_ordered_map() {
+        Map<String, String> manyWords = orderedMapOf(
+                entryOf("language", "java"),
+                entryOf("type", "unittest"),
+                entryOf("library", "testable")
+        );
+        assertEquals(3, manyWords.size());
+        String[] wordKeys = manyWords.keySet().toArray(new String[0]);
+        assertEquals("language", wordKeys[0]);
+        assertEquals("type", wordKeys[1]);
+        assertEquals("library", wordKeys[2]);
+
+        Map<Integer, Double> manyValues = orderedMapOf(
+                entryOf(1, 10.12D),
+                entryOf(2, 20.24D),
+                entryOf(3, 30.36D)
+        );
+        assertEquals(3, manyValues.size());
+        Integer[] valueKeys = manyValues.keySet().toArray(new Integer[0]);
+        assertEquals(1, valueKeys[0]);
+        assertEquals(2, valueKeys[1]);
+        assertEquals(3, valueKeys[2]);
     }
 
 }
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