feat: support shoud.be.true/false() (#6)

lib/transformer.js

@@ -254,16 +254,34 @@ module.exports = ({ path, source }, { jscodeshift: j }) => {
 
   // @example
   // a.b.should.be.ok() => assert(a.b);
-  // a.b.should.not.be.ok() => assert(!a.b);
+  // a.b.should.be.empty() => assert(a.b.length === 0);
   root.find(j.CallExpression, {
     callee: {
       object: {
         object: { property: { name: 'should' } },
         property: { name: 'be' },
       },
-      property: { name: 'ok' },
+      property(node) {
+        return /^ok|true|false|empty$/.test(node.name);
+      },
     },
   }).replaceWith(path => {
+    if (path.value.callee.property.name === 'false') {
+      return j.callExpression(
+        j.identifier('assert'), [
+          j.unaryExpression('!', path.value.callee.object.object.object),
+        ]);
+    }
+    if (path.value.callee.property.name === 'empty') {
+      return j.callExpression(
+        j.identifier('assert'), [
+          j.binaryExpression('===',
+            j.memberExpression(path.value.callee.object.object.object, j.identifier('length')),
+            j.literal(0)
+          ),
+        ]
+      );
+    }
     return j.callExpression(
       j.identifier('assert'), [ path.value.callee.object.object.object ]
     );
@@ -329,6 +347,17 @@ module.exports = ({ path, source }, { jscodeshift: j }) => {
           ]
         ));
     }
+    if (path.value.expression.property.name === 'empty') {
+      return j.expressionStatement(
+        j.callExpression(
+          j.identifier('assert'), [
+            j.binaryExpression('===',
+              j.memberExpression(path.value.expression.object.object.object, j.identifier('length')),
+              j.literal(0)
+            ),
+          ]
+        ));
+    }
     return path;
   });
   root.find(j.ExpressionStatement, {

test/fixtures/input/test/a.js

@@ -39,5 +39,7 @@ describe('test/xxx.test.js', () => {
     obj.should.have.properties({ a: '123', c: false });
     obj.should.have.property('a');
     a.should.length(3);
+    a.should.be.empty;
+    a.should.be.empty();
   });
 });

test/fixtures/input/test/b.js

@@ -63,5 +63,7 @@ describe('test/b.test.js', () => {
     obj.should.not.be.a.Date();
     b.should.be.true;
     c.should.be.false;
+    b.should.be.true();
+    c.should.be.false();
   });
 });

test/fixtures/output/test/a.js

@@ -39,5 +39,7 @@ describe('test/xxx.test.js', () => {
     Object.keys({ a: '123', c: false }).forEach(p => assert.deepEqual((obj)[p], ({ a: '123', c: false })[p]));
     assert(Object.prototype.hasOwnProperty.call(obj, 'a'));
     assert(a.length === 3);
+    assert(a.length === 0);
+    assert(a.length === 0);
   });
 });

test/fixtures/output/test/b.js

@@ -62,5 +62,7 @@ describe('test/b.test.js', () => {
     assert(Object.prototype.toString.call(obj) !== '[object Date]');
     assert(b);
     assert(!c);
+    assert(b);
+    assert(!c);
   });
 });