[analyzer] support all default param types

packages/analyzer/src/javascript/esutil.ts

@@ -409,7 +409,7 @@ export function toMethodParam(
 
   } else if (
       babel.isAssignmentPattern(nodeParam) &&
-      babel.isIdentifier(nodeParam.left) && babel.isLiteral(nodeParam.right)) {
+      babel.isIdentifier(nodeParam.left)) {
     // Parameter with a default: method(param = "default")
     name = nodeParam.left.name;
     defaultValue = generate(nodeParam.right).code;

packages/analyzer/src/test/javascript/class-scanner_test.ts

@@ -250,6 +250,17 @@ suite('Class', async () => {
               name: 'customInstanceFunction',
               description: '',
             },
+            {
+              name: 'methodWithDefaultParam',
+              description: '',
+              params: [{name: 'x', defaultValue: '12'}],
+            },
+            {
+              name: 'methodWithComplexDefaultParam',
+              description: '',
+              params: [{name: 'a', defaultValue: '[1, 2, 3]'}],
+              return: { type: 'void' }
+            },
             {
               name: 'customInstanceFunctionWithJSDoc',
               description: 'This is the description for ' +
@@ -514,6 +525,17 @@ suite('Class', async () => {
               name: 'customInstanceFunction',
               description: '',
             },
+            {
+              name: 'methodWithDefaultParam',
+              description: '',
+              params: [{name: 'x', defaultValue: '12'}],
+            },
+            {
+              name: 'methodWithComplexDefaultParam',
+              description: '',
+              params: [{name: 'a', defaultValue: '[1, 2, 3]'}],
+              return: { type: 'void' }
+            },
             {
               name: 'customInstanceFunctionWithJSDoc',
               description: 'This is the description for ' +
@@ -527,7 +549,6 @@ suite('Class', async () => {
               name: 'customInstanceFunctionWithParams',
               description: '',
               params: [{name: 'a'}, {name: 'b'}, {name: 'c'}],
-
             },
             {
               name: 'customInstanceFunctionWithParamsAndJSDoc',

packages/analyzer/src/test/static/class/class-methods.js

@@ -15,6 +15,14 @@ class Class {
     return 4;
   }
 
+  methodWithDefaultParam(x = 12) {
+    return 24;
+  }
+
+  methodWithComplexDefaultParam(a = [1, 2, 3]) {
+    return;
+  }
+
   /**
    * This is the description for customInstanceFunctionWithJSDoc.
    * @return {Number} - The number 5, always.