Add tests for scoping

tests/baselines/reference/for-of51.errors.txt

@@ -0,0 +1,7 @@
+tests/cases/conformance/es6/for-ofStatements/for-of51.ts(1,10): error TS2480: 'let' is not allowed to be used as a name in 'let' or 'const' declarations.
+
+
+==== tests/cases/conformance/es6/for-ofStatements/for-of51.ts (1 errors) ====
+    for (let let of []) {}
+             ~~~
+!!! error TS2480: 'let' is not allowed to be used as a name in 'let' or 'const' declarations.

tests/baselines/reference/for-of51.js

@@ -0,0 +1,5 @@
+//// [for-of51.ts]
+for (let let of []) {}
+
+//// [for-of51.js]
+for (let let of []) { }

tests/baselines/reference/for-of52.errors.txt

@@ -0,0 +1,10 @@
+tests/cases/conformance/es6/for-ofStatements/for-of52.ts(1,11): error TS2451: Cannot redeclare block-scoped variable 'v'.
+tests/cases/conformance/es6/for-ofStatements/for-of52.ts(1,14): error TS2451: Cannot redeclare block-scoped variable 'v'.
+
+
+==== tests/cases/conformance/es6/for-ofStatements/for-of52.ts (2 errors) ====
+    for (let [v, v] of [[]]) {}
+              ~
+!!! error TS2451: Cannot redeclare block-scoped variable 'v'.
+                 ~
+!!! error TS2451: Cannot redeclare block-scoped variable 'v'.

tests/baselines/reference/for-of52.js

@@ -0,0 +1,5 @@
+//// [for-of52.ts]
+for (let [v, v] of [[]]) {}
+
+//// [for-of52.js]
+for (let [v, v] of [[]]) { }

tests/baselines/reference/for-of53.js

@@ -0,0 +1,9 @@
+//// [for-of53.ts]
+for (let v of []) {
+    var v;
+}
+
+//// [for-of53.js]
+for (let v of []) {
+    var v;
+}

tests/baselines/reference/for-of53.types

@@ -0,0 +1,8 @@
+=== tests/cases/conformance/es6/for-ofStatements/for-of53.ts ===
+for (let v of []) {
+>v : any
+>[] : undefined[]
+
+    var v;
+>v : any
+}

tests/baselines/reference/for-of54.errors.txt

@@ -0,0 +1,9 @@
+tests/cases/conformance/es6/for-ofStatements/for-of54.ts(2,9): error TS2481: Cannot initialize outer scoped variable 'v' in the same scope as block scoped declaration 'v'.
+
+
+==== tests/cases/conformance/es6/for-ofStatements/for-of54.ts (1 errors) ====
+    for (let v of []) {
+        var v = 0;
+            ~
+!!! error TS2481: Cannot initialize outer scoped variable 'v' in the same scope as block scoped declaration 'v'.
+    }

tests/baselines/reference/for-of54.js

@@ -0,0 +1,9 @@
+//// [for-of54.ts]
+for (let v of []) {
+    var v = 0;
+}
+
+//// [for-of54.js]
+for (let v of []) {
+    var v = 0;
+}

tests/baselines/reference/for-of55.js

@@ -0,0 +1,11 @@
+//// [for-of55.ts]
+let v = [1];
+for (let v of v) {
+    v;
+}
+
+//// [for-of55.js]
+let v = [1];
+for (let v of v) {
+    v;
+}

tests/baselines/reference/for-of55.types

@@ -0,0 +1,12 @@
+=== tests/cases/conformance/es6/for-ofStatements/for-of55.ts ===
+let v = [1];
+>v : number[]
+>[1] : number[]
+
+for (let v of v) {
+>v : any
+>v : any
+
+    v;
+>v : any
+}

tests/cases/conformance/es6/for-ofStatements/for-of51.ts

@@ -0,0 +1,2 @@
+//@target: ES6
+for (let let of []) {}

tests/cases/conformance/es6/for-ofStatements/for-of52.ts

@@ -0,0 +1,2 @@
+//@target: ES6
+for (let [v, v] of [[]]) {}

tests/cases/conformance/es6/for-ofStatements/for-of53.ts

@@ -0,0 +1,4 @@
+//@target: ES6
+for (let v of []) {
+    var v;
+}

tests/cases/conformance/es6/for-ofStatements/for-of54.ts

@@ -0,0 +1,4 @@
+//@target: ES6
+for (let v of []) {
+    var v = 0;
+}

tests/cases/conformance/es6/for-ofStatements/for-of55.ts

@@ -0,0 +1,5 @@
+//@target: ES6
+let v = [1];
+for (let v of v) {
+    v;
+}