fix(pattern return statement): allow undefined be the matched return …

…value
Jiansen · Jul 25, 2016 · 7e7a308 · 7e7a308
1 parent 7297a87
commit 7e7a308
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Showing 4 changed files with 25 additions and 0 deletions.
diff --git a/src/index.js b/src/index.js
@@ -1,6 +1,7 @@
 const isUndefined = (value) => typeof value === 'undefined'
 
 const evalMatchedPatternByStatmentsType = {
+  'undefined': (_obj, value, _args) => undefined,
   'string': (_obj, value, _args) => value,
   'number': (_obj, value, _args) => value,
   'boolean': (_obj, value, _args) => value,

diff --git a/test/misc.spec.coffee b/test/misc.spec.coffee
@@ -17,6 +17,14 @@ describe 'Miscellaneous useages', ->
     )
     expect(m).to.be.equal 'TEN'
 
+  it 'statements value could be undefined', ->
+    m = match('undefined')(
+      [1, 'ONE'],
+      ['undefined', undefined],
+      [2, 'TWO']
+    )
+    expect(m).to.be.equal undefined
+
   it 'pass additional parameters to matched patial function', ->
     m = match(1)(
       [1, (x,y,z)->

diff --git a/test/misc.spec.es5.js b/test/misc.spec.es5.js
@@ -19,6 +19,14 @@ describe('Miscellaneous useages', function() {
     );
     expect(m).to.be.equal('TEN');
   });
+  it('statements value could be undefined', function() {
+    var m = match('undefined')(
+      [1, 'ONE'],
+      ['undefined', undefined],
+      [2, 'TWO']
+    );
+    expect(m).to.be.equal(undefined);
+  });
   it('pass additional parameters to matched patial function', function() {
     var m = match(1)(
       [1, function(x,y,z){

diff --git a/test/misc.spec.es6.js b/test/misc.spec.es6.js
@@ -14,6 +14,14 @@ describe('Miscellaneous useages', function () {
       )
       expect(m).to.be.equal('TEN');
   });
+  it('statements value could be undefined', () => {
+    const m = match('undefined')(
+      [1, 'ONE'],
+      ['undefined', undefined],
+      [2, 'TWO']
+    )
+    expect(m).to.be.equal(undefined)
+  });
   it('pass additional parameters to matched patial function', () => {
     const m = match(1)(
       [1, (x,y,z)=>{