defaultPropsHandler ignores non-Property nodes

react-docgen threw an error if the default props object literal
contained a spread property.

Author: fkling

bin/react-docgen.js

@@ -62,6 +62,9 @@ function writeError(msg, path) {
     process.stderr.write('Error with path "' + path + '": ');
   }
   process.stderr.write(msg + '\n');
+  if (msg instanceof Error) {
+    process.stderr.write(msg.stack + '\n');
+  }
 }
 
 function exitWithError(error) {

src/handlers/__tests__/defaultPropsHandler-test.js

@@ -73,7 +73,7 @@ describe('defaultPropsHandler', () => {
   });
 
   describe('ClassDeclaration with static defaultProps', () => {
-    it.only('should find prop default values that are literals', () => {
+    it('should find prop default values that are literals', () => {
       var src = `
         class Foo {
           static defaultProps = {
@@ -103,4 +103,28 @@ describe('defaultPropsHandler', () => {
     });
   });
 
+  it('should only consider Property nodes, not e.g. spread properties', () => {
+    var src = `
+      ({
+        getDefaultProps: function() {
+          return {
+            ...Foo.bar,
+            bar: 42,
+          };
+        }
+      })
+    `;
+    let definition = parse(src).get('body', 0, 'expression');
+    expect(() => defaultPropsHandler(documentation, definition))
+      .not.toThrow();
+    expect(documentation.descriptors).toEqual({
+      bar: {
+        defaultValue: {
+          value: '42',
+          computed: false,
+        },
+      },
+    });
+  });
+
 });

src/handlers/defaultPropsHandler.js

@@ -68,14 +68,16 @@ export default function defaultPropsHandler(
   }
 
   if (types.ObjectExpression.check(defaultPropsPath.node)) {
-    defaultPropsPath.get('properties').each(function(propertyPath) {
-      var propDescriptor = documentation.getPropDescriptor(
-        getPropertyName(propertyPath)
-      );
-      var defaultValue = getDefaultValue(propertyPath.get('value'));
-      if (defaultValue) {
-        propDescriptor.defaultValue = defaultValue;
-      }
-    });
+    defaultPropsPath.get('properties')
+      .filter(propertyPath => types.Property.check(propertyPath.node))
+      .forEach(function(propertyPath) {
+        var propDescriptor = documentation.getPropDescriptor(
+          getPropertyName(propertyPath)
+        );
+        var defaultValue = getDefaultValue(propertyPath.get('value'));
+        if (defaultValue) {
+          propDescriptor.defaultValue = defaultValue;
+        }
+      });
   }
 }

src/utils/__tests__/docblock-test.js

@@ -38,7 +38,7 @@ describe('docblock', () => {
     });
   });
 
-  describe.only('getDocblock', () => {
+  describe('getDocblock', () => {
     let comment = ['This is a docblock.', 'This is the second line.'];
     let source = [
       '/**',