Improve support for Typescript declare structures

src/ExportMap.js

@@ -464,6 +464,7 @@ ExportMap.parse = function (path, content, context) {
           case 'ClassDeclaration':
           case 'TypeAlias': // flowtype with babel-eslint parser
           case 'InterfaceDeclaration':
+          case 'TSDeclareFunction':
           case 'TSEnumDeclaration':
           case 'TSTypeAliasDeclaration':
           case 'TSInterfaceDeclaration':
@@ -509,6 +510,20 @@ ExportMap.parse = function (path, content, context) {
         m.reexports.set(s.exported.name, { local, getImport: () => resolveImport(nsource) })
       })
     }
+
+    // This doesn't declare anything, but changes what's being exported.
+    if (n.type === 'TSExportAssignment') {
+      const d = ast.body.find(
+        b => b.type === 'TSModuleDeclaration' && b.id.name === n.expression.name
+      )
+      if (d && d.body && d.body.body) {
+        d.body.body.forEach(b => {
+          // Export-assignment exports all members in the namespace, explicitly exported or not.
+          const s = b.type === 'ExportNamedDeclaration' ? b.declaration : b
+          m.namespace.set(s.id.name, captureDoc(source, docStyleParsers, b))
+        })
+      }
+    }
   })
 
   return m

tests/files/typescript-declare.d.ts

@@ -0,0 +1,33 @@
+export declare type MyType = string
+export declare enum MyEnum {
+  Foo,
+  Bar,
+  Baz
+}
+export declare interface Foo {
+  native: string | number
+  typedef: MyType
+  enum: MyEnum
+}
+
+export declare abstract class Bar {
+  abstract foo(): Foo
+
+  method();
+}
+
+export declare function getFoo() : MyType;
+
+export declare module MyModule {
+  export function ModuleFunction();
+}
+
+export declare namespace MyNamespace {
+  export function NamespaceFunction();
+
+  export module NSModule {
+    export function NSModuleFunction();
+  }
+}
+
+interface NotExported {}

tests/files/typescript-export-assign.d.ts

@@ -0,0 +1,39 @@
+export = AssignedNamespace;
+
+declare namespace AssignedNamespace {
+  type MyType = string
+  enum MyEnum {
+    Foo,
+    Bar,
+    Baz
+  }
+
+  interface Foo {
+    native: string | number
+    typedef: MyType
+    enum: MyEnum
+  }
+
+  abstract class Bar {
+    abstract foo(): Foo
+
+    method();
+  }
+
+  export function getFoo() : MyType;
+
+  export module MyModule {
+    export function ModuleFunction();
+  }
+
+  export namespace MyNamespace {
+    export function NamespaceFunction();
+
+    export module NSModule {
+      export function NSModuleFunction();
+    }
+  }
+
+  // Export-assignment exports all members in the namespace, explicitly exported or not.
+  // interface NotExported {}
+}

tests/src/rules/named.js

@@ -292,98 +292,100 @@ context('Typescript', function () {
   }
 
   parsers.forEach((parser) => {
-    ruleTester.run('named', rule, {
-      valid: [
-        test({
-          code: 'import { MyType } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-        test({
-          code: 'import { Foo } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-        test({
-          code: 'import { Bar } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-        test({
-          code: 'import { getFoo } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-        test({
-          code: 'import { MyEnum } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-        test({
-          code: `
-            import { MyModule } from "./typescript"
-            MyModule.ModuleFunction()
-          `,
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-        test({
-          code: `
-            import { MyNamespace } from "./typescript"
-            MyNamespace.NSModule.NSModuleFunction()
-          `,
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-        }),
-      ],
-
-      invalid: [
-        test({
-          code: 'import { MissingType } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-          errors: [{
-            message: "MissingType not found in './typescript'",
-            type: 'Identifier',
-          }],
-        }),
-        test({
-          code: 'import { NotExported } from "./typescript"',
-          parser: parser,
-          settings: {
-            'import/parsers': { [parser]: ['.ts'] },
-            'import/resolver': { 'eslint-import-resolver-typescript': true },
-          },
-          errors: [{
-            message: "NotExported not found in './typescript'",
-            type: 'Identifier',
-          }],
-        }),
-      ],
+    ['typescript', 'typescript-declare', 'typescript-export-assign'].forEach((source) => {
+      ruleTester.run(`named`, rule, {
+        valid: [
+          test({
+            code: `import { MyType } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+          test({
+            code: `import { Foo } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+          test({
+            code: `import { Bar } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+          test({
+            code: `import { getFoo } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+          test({
+            code: `import { MyEnum } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+          test({
+            code: `
+              import { MyModule } from "./${source}"
+              MyModule.ModuleFunction()
+            `,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+          test({
+            code: `
+              import { MyNamespace } from "./${source}"
+              MyNamespace.NSModule.NSModuleFunction()
+            `,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
+        ],
+
+        invalid: [
+          test({
+            code: `import { MissingType } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+            errors: [{
+              message: `MissingType not found in './${source}'`,
+              type: 'Identifier',
+            }],
+          }),
+          test({
+            code: `import { NotExported } from "./${source}"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+            errors: [{
+              message: `NotExported not found in './${source}'`,
+              type: 'Identifier',
+            }],
+          }),
+        ],
+      })
     })
   })
 })

utils/unambiguous.js

@@ -2,7 +2,7 @@
 exports.__esModule = true
 
 
-const pattern = /(^|;)\s*(export|import)((\s+\w)|(\s*[{*]))/m
+const pattern = /(^|;)\s*(export|import)((\s+\w)|(\s*[{*=]))/m
 /**
  * detect possible imports/exports without a full parse.
  *
@@ -18,7 +18,7 @@ exports.test = function isMaybeUnambiguousModule(content) {
 }
 
 // future-/Babel-proof at the expense of being a little loose
-const unambiguousNodeType = /^(Exp|Imp)ort.*Declaration$/
+const unambiguousNodeType = /^(((Exp|Imp)ort.*Declaration)|TSExportAssignment)$/
 
 /**
  * Given an AST, return true if the AST unambiguously represents a module.