diff --git a/jest.config.js b/jest.config.js
index 1c72a43..39533fa 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -129,7 +129,7 @@ module.exports = {
     // setupFiles: [],
 
     // A list of paths to modules that run some code to configure or set up the testing framework before each test
-    // setupFilesAfterEnv: [],
+    setupFilesAfterEnv: ['<rootDir>/test/setupTests.ts'],
 
     // The number of seconds after which a test is considered as slow and reported as such in the results.
     // slowTestThreshold: 5,
diff --git a/test/jest.d.ts b/test/jest.d.ts
new file mode 100644
index 0000000..56a6dca
--- /dev/null
+++ b/test/jest.d.ts
@@ -0,0 +1,17 @@
+namespace jest {
+    interface Matchers<R = void, T = {}> {
+        /**
+         * @description
+         * Check whether two arrays are equal without considering the order of items.
+         *
+         * Make sure expected array has no duplicate item.
+         *
+         * Every item must be primitive type, like string, number, etc.
+         *
+         * @example
+         * expect(['a', 'b']).toMatchUnorderedArrary(['b', 'a']) // pass
+         * expect(['b', 'a']).toMatchUnorderedArrary(['c', 'b', 'a']) // not pass, missing item 'c'
+         */
+        toMatchUnorderedArrary(expected: unknown[]): R;
+    }
+}
diff --git a/test/matchers.ts b/test/matchers.ts
new file mode 100644
index 0000000..66cb5d8
--- /dev/null
+++ b/test/matchers.ts
@@ -0,0 +1,49 @@
+export const toMatchUnorderedArrary: jest.CustomMatcher = function (
+    actual: Array<unknown>,
+    expected: Array<unknown>
+) {
+    if (!Array.isArray(actual) || !Array.isArray(expected)) {
+        throw new TypeError('These must be of type array!');
+    }
+
+    const print = () =>
+        `Expected: ${this.utils.printExpected(expected)}. \n` +
+        `Received: ${this.utils.printReceived(actual)}. \n`;
+
+    const expectedMap = new Map(expected.map((item) => [item, false]));
+    const unexpectedItemList = [];
+
+    for (const item of actual) {
+        if (!expectedMap.has(item) || expectedMap.get(item)) unexpectedItemList.push(item);
+        else expectedMap.set(item, true);
+    }
+
+    if (unexpectedItemList.length) {
+        return {
+            pass: false,
+            message: () =>
+                `Receive unexpected items: ${this.utils.printReceived(unexpectedItemList)}. \n` +
+                print(),
+        };
+    }
+
+    const missingItemList = Array.from(expectedMap)
+        .filter(([_, isAppeared]) => !isAppeared)
+        .map(([item]) => item);
+
+    if (missingItemList.length) {
+        return {
+            pass: false,
+            message: () =>
+                `Missing expected items: ${this.utils.printExpected(missingItemList)}. \n` +
+                print(),
+        };
+    }
+
+    return {
+        pass: true,
+        message() {
+            return 'The received array matches the expected array.';
+        },
+    };
+};
diff --git a/test/parser/flinksql/suggestion/tokenSuggestion.test.ts b/test/parser/flinksql/suggestion/tokenSuggestion.test.ts
index c8a8642..a416dea 100644
--- a/test/parser/flinksql/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/flinksql/suggestion/tokenSuggestion.test.ts
@@ -19,7 +19,7 @@ describe('Flink SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['MODULES', 'CATALOG']);
+        expect(suggestion).toMatchUnorderedArrary(['MODULES', 'CATALOG']);
     });
 
     test('Create Statement ', () => {
@@ -32,7 +32,7 @@ describe('Flink SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'CATALOG',
             'FUNCTION',
             'TEMPORARY',
@@ -52,7 +52,7 @@ describe('Flink SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'MODULES',
             'FULL',
             'FUNCTIONS',
diff --git a/test/parser/hive/suggestion/tokenSuggestion.test.ts b/test/parser/hive/suggestion/tokenSuggestion.test.ts
index 33d2dbc..90f4776 100644
--- a/test/parser/hive/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/hive/suggestion/tokenSuggestion.test.ts
@@ -18,7 +18,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'APPLICATION',
             'GROUP',
             'USER',
@@ -45,7 +45,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'CONNECTOR',
             'APPLICATION',
             'GROUP',
@@ -80,7 +80,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['FROM']);
+        expect(suggestion).toMatchUnorderedArrary(['FROM']);
     });
 
     test('After DESCRIBE', () => {
@@ -92,7 +92,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'EXTENDED',
             'FORMATTED',
             'FUNCTION',
@@ -111,7 +111,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'CONNECTOR',
             'APPLICATION',
             'GROUP',
@@ -141,7 +141,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['TABLE']);
+        expect(suggestion).toMatchUnorderedArrary(['TABLE']);
     });
 
     test('After IMPORT', () => {
@@ -153,7 +153,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['FROM', 'TABLE', 'EXTERNAL']);
+        expect(suggestion).toMatchUnorderedArrary(['FROM', 'TABLE', 'EXTERNAL']);
     });
 
     test('After INSERT', () => {
@@ -165,7 +165,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['INTO', 'OVERWRITE']);
+        expect(suggestion).toMatchUnorderedArrary(['INTO', 'OVERWRITE']);
     });
 
     test('After LOAD', () => {
@@ -177,7 +177,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['DATA']);
+        expect(suggestion).toMatchUnorderedArrary(['DATA']);
     });
 
     test('After SHOW', () => {
@@ -189,7 +189,7 @@ describe('Hive SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'CURRENT',
             'ROLES',
             'PRINCIPALS',
diff --git a/test/parser/impala/suggestion/tokenSuggestion.test.ts b/test/parser/impala/suggestion/tokenSuggestion.test.ts
index 27be51b..f29c7b6 100644
--- a/test/parser/impala/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/impala/suggestion/tokenSuggestion.test.ts
@@ -19,7 +19,7 @@ describe('Impala SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['TABLE', 'VIEW', 'DATABASE']);
+        expect(suggestion).toMatchUnorderedArrary(['TABLE', 'VIEW', 'DATABASE']);
     });
 
     test('After CREATE', () => {
@@ -32,7 +32,7 @@ describe('Impala SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'TABLE',
             'EXTERNAL',
             'VIEW',
@@ -54,7 +54,7 @@ describe('Impala SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'DATABASE',
             'SCHEMA',
             'TABLE',
@@ -77,7 +77,7 @@ describe('Impala SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['INTO', 'OVERWRITE']);
+        expect(suggestion).toMatchUnorderedArrary(['INTO', 'OVERWRITE']);
     });
 
     test('After SHOW', () => {
@@ -90,7 +90,7 @@ describe('Impala SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'DATABASES',
             'SCHEMAS',
             'TABLES',
diff --git a/test/parser/mysql/suggestion/tokenSuggestion.test.ts b/test/parser/mysql/suggestion/tokenSuggestion.test.ts
index 7b576e5..e70462d 100644
--- a/test/parser/mysql/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/mysql/suggestion/tokenSuggestion.test.ts
@@ -19,7 +19,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'RESOURCE',
             'USER',
             'VIEW',
@@ -50,7 +50,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'RESOURCE',
             'USER',
             'ROLE',
@@ -91,7 +91,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['FROM', 'IGNORE', 'QUICK', 'LOW_PRIORITY']);
+        expect(suggestion).toMatchUnorderedArrary(['FROM', 'IGNORE', 'QUICK', 'LOW_PRIORITY']);
     });
 
     test('After DESCRIBE', () => {
@@ -104,7 +104,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'ANALYZE',
             'SELECT',
             'DELETE',
@@ -128,7 +128,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'RESOURCE',
             'USER',
             'PREPARE',
@@ -161,7 +161,13 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['INTO', 'IGNORE', 'DELAYED', 'HIGH_PRIORITY', 'LOW_PRIORITY']);
+        expect(suggestion).toMatchUnorderedArrary([
+            'INTO',
+            'IGNORE',
+            'DELAYED',
+            'HIGH_PRIORITY',
+            'LOW_PRIORITY',
+        ]);
     });
 
     test('After LOAD', () => {
@@ -174,7 +180,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['INDEX', 'XML', 'DATA']);
+        expect(suggestion).toMatchUnorderedArrary(['INDEX', 'XML', 'DATA']);
     });
 
     test('After SHOW', () => {
@@ -187,7 +193,7 @@ describe('MySQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'REPLICAS',
             'REPLICA',
             'SLAVE',
diff --git a/test/parser/pgsql/suggestion/tokenSuggestion.test.ts b/test/parser/pgsql/suggestion/tokenSuggestion.test.ts
index c319de9..e9ad069 100644
--- a/test/parser/pgsql/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/pgsql/suggestion/tokenSuggestion.test.ts
@@ -17,7 +17,7 @@ describe('Postgres SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'TYPE',
             'TEXT',
             'STATISTICS',
@@ -66,7 +66,7 @@ describe('Postgres SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'RECURSIVE',
             'VIEW',
             'TEMPORARY',
@@ -126,7 +126,7 @@ describe('Postgres SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['FROM']);
+        expect(suggestion).toMatchUnorderedArrary(['FROM']);
     });
 
     test('After DROP', () => {
@@ -138,7 +138,7 @@ describe('Postgres SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'OPERATOR',
             'ROUTINE',
             'PROCEDURE',
@@ -188,6 +188,6 @@ describe('Postgres SQL Token Suggestion', () => {
             commentOtherLine(tokenSql, pos.lineNumber),
             pos
         )?.keywords;
-        expect(suggestion).toEqual(['INTO']);
+        expect(suggestion).toMatchUnorderedArrary(['INTO']);
     });
 });
diff --git a/test/parser/spark/suggestion/tokenSuggestion.test.ts b/test/parser/spark/suggestion/tokenSuggestion.test.ts
index 01eb23c..c1d36d4 100644
--- a/test/parser/spark/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/spark/suggestion/tokenSuggestion.test.ts
@@ -19,7 +19,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'TABLE',
             'INDEX',
             'VIEW',
@@ -40,7 +40,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'TEMPORARY',
             'INDEX',
             'ROLE',
@@ -67,7 +67,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['FROM']);
+        expect(suggestion).toMatchUnorderedArrary(['FROM']);
     });
 
     test('After DESCRIBE', () => {
@@ -80,7 +80,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'WITH',
             'SELECT',
             'MAP',
@@ -106,7 +106,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'TEMPORARY',
             'INDEX',
             'ROLE',
@@ -130,7 +130,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['OVERWRITE', 'INTO']);
+        expect(suggestion).toMatchUnorderedArrary(['OVERWRITE', 'INTO']);
     });
 
     test('After LOAD', () => {
@@ -143,7 +143,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['DATA']);
+        expect(suggestion).toMatchUnorderedArrary(['DATA']);
     });
 
     test('After SHOW', () => {
@@ -156,7 +156,7 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual([
+        expect(suggestion).toMatchUnorderedArrary([
             'LOCKS',
             'INDEXES',
             'TRANSACTIONS',
@@ -195,6 +195,6 @@ describe('Spark SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['TABLE']);
+        expect(suggestion).toMatchUnorderedArrary(['TABLE']);
     });
 });
diff --git a/test/parser/trinosql/suggestion/tokenSuggestion.test.ts b/test/parser/trinosql/suggestion/tokenSuggestion.test.ts
index abff7bf..41f5780 100644
--- a/test/parser/trinosql/suggestion/tokenSuggestion.test.ts
+++ b/test/parser/trinosql/suggestion/tokenSuggestion.test.ts
@@ -19,7 +19,7 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['VIEW', 'MATERIALIZED', 'TABLE', 'SCHEMA']);
+        expect(suggestion).toMatchUnorderedArrary(['VIEW', 'MATERIALIZED', 'TABLE', 'SCHEMA']);
     });
 
     test('After CREATE', () => {
@@ -32,7 +32,14 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['ROLE', 'VIEW', 'OR', 'MATERIALIZED', 'TABLE', 'SCHEMA']);
+        expect(suggestion).toMatchUnorderedArrary([
+            'ROLE',
+            'VIEW',
+            'OR',
+            'MATERIALIZED',
+            'TABLE',
+            'SCHEMA',
+        ]);
     });
 
     test('After DEALLOCATE', () => {
@@ -45,7 +52,7 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['PREPARE']);
+        expect(suggestion).toMatchUnorderedArrary(['PREPARE']);
     });
 
     test('After DELETE', () => {
@@ -58,7 +65,7 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['FROM']);
+        expect(suggestion).toMatchUnorderedArrary(['FROM']);
     });
 
     test('After DESCRIBE', () => {
@@ -71,7 +78,7 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['OUTPUT', 'INPUT']);
+        expect(suggestion).toMatchUnorderedArrary(['OUTPUT', 'INPUT']);
     });
 
     test('After DROP', () => {
@@ -84,7 +91,13 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['ROLE', 'VIEW', 'MATERIALIZED', 'TABLE', 'SCHEMA']);
+        expect(suggestion).toMatchUnorderedArrary([
+            'ROLE',
+            'VIEW',
+            'MATERIALIZED',
+            'TABLE',
+            'SCHEMA',
+        ]);
     });
 
     test('After INSERT', () => {
@@ -97,6 +110,6 @@ describe('Trino SQL Token Suggestion', () => {
             pos
         )?.keywords;
 
-        expect(suggestion).toEqual(['INTO']);
+        expect(suggestion).toMatchUnorderedArrary(['INTO']);
     });
 });
diff --git a/test/setupTests.ts b/test/setupTests.ts
new file mode 100644
index 0000000..96a90e5
--- /dev/null
+++ b/test/setupTests.ts
@@ -0,0 +1,3 @@
+import { toMatchUnorderedArrary } from './matchers';
+
+expect.extend({ toMatchUnorderedArrary });