feature: @putout/plugin-types: declare: isArray, isEmptyArray: add

packages/plugin-types/README.md

@@ -43,6 +43,8 @@ Supported assertions:
 - `isSymbol`;
 - `isNull`;
 - `isBigInt`;
+- `isArray`;
+- `isEmptyArray`;
 
 #### ❌ Example of incorrect code
 

packages/plugin-types/lib/declare/fixture/is-array-fix.js

@@ -0,0 +1,2 @@
+const {isArray} = Array;
+isArray(x);

packages/plugin-types/lib/declare/fixture/is-array.js

@@ -0,0 +1 @@
+isArray(x);

packages/plugin-types/lib/declare/fixture/is-empty-array-fix.js

@@ -0,0 +1,3 @@
+const {isArray} = Array;
+const isEmptyArray = (a) => isArray(a) && !a.length;
+isEmptyArray(x);

packages/plugin-types/lib/declare/fixture/is-empty-array.js

@@ -0,0 +1 @@
+isEmptyArray(x);

packages/plugin-types/lib/declare/index.js

@@ -11,4 +11,6 @@ module.exports.declare = () => ({
     isSymbol: `const isSymbol = (a) => typeof a === 'symbol'`,
     isBigInt: `const isBigInt = (a) => typeof a === 'bigint'`,
     isNull: `const isNull = (a) => !a && typeof a === 'object'`,
+    isArray: 'const {isArray} = Array',
+    isEmptyArray: 'const isEmptyArray = (a) => isArray(a) && !a.length',
 });

packages/plugin-types/lib/declare/index.spec.js

@@ -39,3 +39,13 @@ test('putout: plugin: types: declare: is-symbol', (t) => {
     t.transform('is-symbol');
     t.end();
 });
+
+test('putout: plugin: types: declare: is-array', (t) => {
+    t.transform('is-array');
+    t.end();
+});
+
+test('putout: plugin: types: declare: is-empty-array', (t) => {
+    t.transform('is-empty-array');
+    t.end();
+});

packages/plugin-types/test/fixture/apply-is-array-fix.js

@@ -1,2 +1,3 @@
+const {isArray} = Array;
 isArray([1, 2, 3]);
 isArray(x);