Add testing

package.json

@@ -11,6 +11,19 @@
     "recast": "^0.11.18"
   },
   "devDependencies": {
-    "glob": "^7.1.1"
+    "glob": "^7.1.1",
+    "jest": "^18.0.0",
+    "flow-parser": "^0.37.0"
+  },
+  "scripts": {
+    "test": "jest"
+  },
+  "jest": {
+    "setupFiles": [
+      "<rootDir>/tests_config/run_spec.js"
+    ],
+    "testRegex": [
+      "jsfmt\\.spec\\.js$"
+    ]
   }
 }

tests/abnormal/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,127 @@
+exports[`test break-continue.js 1`] = `
+"function foo() {
+    while(true) { break; }
+}
+
+function bar() {
+    L: do { continue L; } while(false)
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+/src/printer.js:925
+      if (endsWithBrace(doBody))
+          ^
+
+ReferenceError: endsWithBrace is not defined
+    at genericPrintNoParens (/src/printer.js:925:11)
+    at genericPrint (/src/printer.js:166:7)
+    at p (/src/printer.js:111:37)
+    at exports.printComments (/src/comments.js:327:20)
+    at printGenerically (/src/printer.js:111:12)
+    at FastPath.call (/src/fast-path.js:113:16)
+    at genericPrintNoParens (/src/printer.js:963:14)
+    at genericPrint (/src/printer.js:166:7)
+    at p (/src/printer.js:111:37)
+    at exports.printComments (/src/comments.js:327:20)
+"
+`;
+
+exports[`test return.js 1`] = `
+"function bar(x:number) { }
+function foo() {
+    var x = null;
+    if (x == null) return;
+    bar(x);
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+function bar(x: number) {
+
+}
+function foo() {
+  var x = null;
+  if (x == null)
+    return;
+  bar(x);
+}
+
+"
+`;
+
+exports[`test toplevel_break.js 1`] = `
+"// @flow
+
+break; // error, illegal
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+/node_modules/babylon/lib/index.js:4255
+  throw err;
+  ^
+
+SyntaxError: Unsyntactic break (3:0)
+    at Parser.pp$5.raise (/node_modules/babylon/lib/index.js:4252:13)
+    at Parser.pp$1.parseBreakContinueStatement (/node_modules/babylon/lib/index.js:1843:44)
+    at Parser.pp$1.parseStatement (/node_modules/babylon/lib/index.js:1703:19)
+    at Parser.parseStatement (/node_modules/babylon/lib/index.js:5224:22)
+    at Parser.pp$1.parseBlockBody (/node_modules/babylon/lib/index.js:2139:21)
+    at Parser.pp$1.parseTopLevel (/node_modules/babylon/lib/index.js:1651:8)
+    at Parser.parse (/node_modules/babylon/lib/index.js:1543:17)
+    at Object.parse$1 [as parse] (/node_modules/babylon/lib/index.js:6472:37)
+    at Object.parse (/index.js:34:26)
+    at Object.parse (/node_modules/recast/lib/parser.js:26:34)
+"
+`;
+
+exports[`test toplevel_continue.js 1`] = `
+"// @flow
+
+continue; // error, illegal
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+/node_modules/babylon/lib/index.js:4255
+  throw err;
+  ^
+
+SyntaxError: Unsyntactic continue (3:0)
+    at Parser.pp$5.raise (/node_modules/babylon/lib/index.js:4252:13)
+    at Parser.pp$1.parseBreakContinueStatement (/node_modules/babylon/lib/index.js:1843:44)
+    at Parser.pp$1.parseStatement (/node_modules/babylon/lib/index.js:1703:19)
+    at Parser.parseStatement (/node_modules/babylon/lib/index.js:5224:22)
+    at Parser.pp$1.parseBlockBody (/node_modules/babylon/lib/index.js:2139:21)
+    at Parser.pp$1.parseTopLevel (/node_modules/babylon/lib/index.js:1651:8)
+    at Parser.parse (/node_modules/babylon/lib/index.js:1543:17)
+    at Object.parse$1 [as parse] (/node_modules/babylon/lib/index.js:6472:37)
+    at Object.parse (/index.js:34:26)
+    at Object.parse (/node_modules/recast/lib/parser.js:26:34)
+"
+`;
+
+exports[`test toplevel_return.js 1`] = `
+"// @flow
+
+return; // error, illegal
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+/node_modules/babylon/lib/index.js:4255
+  throw err;
+  ^
+
+SyntaxError: \'return\' outside of function (3:0)
+    at Parser.pp$5.raise (/node_modules/babylon/lib/index.js:4252:13)
+    at Parser.pp$1.parseReturnStatement (/node_modules/babylon/lib/index.js:1939:10)
+    at Parser.pp$1.parseStatement (/node_modules/babylon/lib/index.js:1722:19)
+    at Parser.parseStatement (/node_modules/babylon/lib/index.js:5224:22)
+    at Parser.pp$1.parseBlockBody (/node_modules/babylon/lib/index.js:2139:21)
+    at Parser.pp$1.parseTopLevel (/node_modules/babylon/lib/index.js:1651:8)
+    at Parser.parse (/node_modules/babylon/lib/index.js:1543:17)
+    at Object.parse$1 [as parse] (/node_modules/babylon/lib/index.js:6472:37)
+    at Object.parse (/index.js:34:26)
+    at Object.parse (/node_modules/recast/lib/parser.js:26:34)
+"
+`;
+
+exports[`test toplevel_throw.js 1`] = `
+"// @flow
+
+throw new Error(\'foo\'); // no error
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// @flow
+throw new Error(\"foo\");// no error
+
+"
+`;

tests/abnormal/break-continue.js

@@ -0,0 +1,7 @@
+function foo() {
+    while(true) { break; }
+}
+
+function bar() {
+    L: do { continue L; } while(false)
+}

tests/abnormal/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname);

tests/abnormal/return.js

@@ -0,0 +1,6 @@
+function bar(x:number) { }
+function foo() {
+    var x = null;
+    if (x == null) return;
+    bar(x);
+}

tests/abnormal/toplevel_break.js

@@ -0,0 +1,3 @@
+// @flow
+
+break; // error, illegal

tests/abnormal/toplevel_continue.js

@@ -0,0 +1,3 @@
+// @flow
+
+continue; // error, illegal

tests/abnormal/toplevel_return.js

@@ -0,0 +1,3 @@
+// @flow
+
+return; // error, illegal

tests/abnormal/toplevel_throw.js

@@ -0,0 +1,3 @@
+// @flow
+
+throw new Error('foo'); // no error