add printer branches for some TypeScript nodes (#1331)

* add TSNeverKeyword

* add TSUndefinedKeyword

* add TSSymbolKeyword

* add TSNonNullExpression

* add TSThisType

* add tests for simple typescript nodes

src/printer.js

@@ -1953,6 +1953,16 @@ function genericPrintNoParens(path, options, print, args) {
       ]);
     case "TSFirstTypeNode":
       return concat([n.parameterName.name, " is ", path.call(print, "typeAnnotation")])
+    case "TSNeverKeyword":
+      return "never";
+    case "TSUndefinedKeyword":
+      return "undefined";
+    case "TSSymbolKeyword":
+      return "symbol";
+    case "TSNonNullExpression":
+      return concat([path.call(print, "expression"), "!"]);
+    case "TSThisType":
+      return "this";
     // TODO
     case "ClassHeritage":
     // TODO

tests/typescript/conformance/types/never/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,10 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`never.ts 1`] = `
+var x: never
+var x: never | string
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+var x: never;
+var x: never | string;
+
+`;

tests/typescript/conformance/types/never/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });

tests/typescript/conformance/types/never/never.ts

@@ -0,0 +1,2 @@
+var x: never
+var x: never | string

tests/typescript/conformance/types/nonNullExpression/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,8 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`nonNullExpression.ts 1`] = `
+var xx = (xx!, xx);
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+var xx = (xx!, xx);
+
+`;

tests/typescript/conformance/types/nonNullExpression/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });

tests/typescript/conformance/types/nonNullExpression/nonNullExpression.ts

@@ -0,0 +1 @@
+var xx = (xx!, xx);

tests/typescript/conformance/types/symbol/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,10 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`symbol.ts 1`] = `
+var x: symbol
+var x: symbol | string
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+var x: symbol;
+var x: symbol | string;
+
+`;

tests/typescript/conformance/types/symbol/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });

tests/typescript/conformance/types/symbol/symbol.ts

@@ -0,0 +1,2 @@
+var x: symbol
+var x: symbol | string

tests/typescript/conformance/types/thisType/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,12 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`thisType.ts 1`] = `
+declare class MyArray<T> extends Array<T> {
+    sort(compareFn?: (a: T, b: T) => number): this;
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+class MyArray<T> extends Array {
+  sort(compareFn?: (a: T, b: T) => number): this
+}
+
+`;

tests/typescript/conformance/types/thisType/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });

tests/typescript/conformance/types/thisType/thisType.ts

@@ -0,0 +1,3 @@
+declare class MyArray<T> extends Array<T> {
+    sort(compareFn?: (a: T, b: T) => number): this;
+}

tests/typescript/conformance/types/undefined/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,10 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`undefined.ts 1`] = `
+var x: undefined
+var x: undefined | string
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+var x: undefined;
+var x: undefined | string;
+
+`;

tests/typescript/conformance/types/undefined/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });

tests/typescript/conformance/types/undefined/undefined.ts

@@ -0,0 +1,2 @@
+var x: undefined
+var x: undefined | string