Fix: scope for TSImportEqualsDeclaration (#571)

Author: armano2

Diff for: analyze-scope.js

@@ -610,6 +610,22 @@ class Referencer extends OriginalReferencer {
         this.MethodDefinition(node);
     }
 
+    /**
+     * Process import equal declaration
+     * @param {TSImportEqualsDeclaration} node The TSImportEqualsDeclaration node to visit.
+     * @returns {void}
+     */
+    TSImportEqualsDeclaration(node) {
+        const { name, moduleReference } = node;
+        if (name && name.type === "Identifier") {
+            this.currentScope().__define(
+                name,
+                new Definition("ImportBinding", name, node, null, null, null)
+            );
+        }
+        this.visit(moduleReference);
+    }
+
     /**
      * Process the global augmentation.
      * 1. Set the global scope as the current scope.

Diff for: tests/fixtures/scope-analysis/import-equals.ts

@@ -0,0 +1 @@
+import foo = require('bar')

Diff for: tests/lib/__snapshots__/scope-analysis.js.snap

@@ -4480,6 +4480,101 @@ Object {
 }
 `;
 
+exports[`TypeScript scope analysis tests/fixtures/scope-analysis/import-equals.ts 1`] = `
+Object {
+  "$id": 2,
+  "block": Object {
+    "range": Array [
+      0,
+      28,
+    ],
+    "type": "Program",
+  },
+  "childScopes": Array [
+    Object {
+      "$id": 1,
+      "block": Object {
+        "range": Array [
+          0,
+          28,
+        ],
+        "type": "Program",
+      },
+      "childScopes": Array [],
+      "functionExpressionScope": false,
+      "isStrict": true,
+      "references": Array [],
+      "throughReferences": Array [],
+      "type": "module",
+      "upperScope": Object {
+        "$ref": 2,
+      },
+      "variableMap": Object {
+        "foo": Object {
+          "$ref": 0,
+        },
+      },
+      "variableScope": Object {
+        "$ref": 1,
+      },
+      "variables": Array [
+        Object {
+          "$id": 0,
+          "defs": Array [
+            Object {
+              "name": Object {
+                "name": "foo",
+                "range": Array [
+                  7,
+                  10,
+                ],
+                "type": "Identifier",
+              },
+              "node": Object {
+                "range": Array [
+                  0,
+                  27,
+                ],
+                "type": "TSImportEqualsDeclaration",
+              },
+              "parent": null,
+              "type": "ImportBinding",
+            },
+          ],
+          "eslintUsed": undefined,
+          "identifiers": Array [
+            Object {
+              "name": "foo",
+              "range": Array [
+                7,
+                10,
+              ],
+              "type": "Identifier",
+            },
+          ],
+          "name": "foo",
+          "references": Array [],
+          "scope": Object {
+            "$ref": 1,
+          },
+        },
+      ],
+    },
+  ],
+  "functionExpressionScope": false,
+  "isStrict": false,
+  "references": Array [],
+  "throughReferences": Array [],
+  "type": "global",
+  "upperScope": null,
+  "variableMap": Object {},
+  "variableScope": Object {
+    "$ref": 2,
+  },
+  "variables": Array [],
+}
+`;
+
 exports[`TypeScript scope analysis tests/fixtures/scope-analysis/interface-type.ts 1`] = `
 Object {
   "$id": 0,

Diff for: visitor-keys.js

@@ -44,12 +44,14 @@ module.exports = Evk.unionWith({
     TSEnumMember: ["id", "initializer"],
     TSExportAssignment: ["expression"],
     TSExportKeyword: [],
+    TSExternalModuleReference: ["expression"],
     TSImportType: ["parameter", "qualifier", "typeParameters"],
     TSLiteralType: ["literal"],
     TSIndexSignature: ["typeAnnotation", "index"],
     TSInterfaceBody: ["body"],
     TSInterfaceDeclaration: ["id", "typeParameters", "heritage", "body"],
     TSInterfaceHeritage: ["id", "typeParameters"],
+    TSImportEqualsDeclaration: ["name", "moduleReference"],
     TSFunctionType: ["parameters", "typeAnnotation"],
     TSMethodSignature: ["typeAnnotation", "typeParameters", "key", "params"],
     TSModuleBlock: ["body"],