Run ExceptionsManager unit tests in both __DEV__ and prod mode

Summary:
Changelog:
[General][Fixed] - Run ExceptionsManager unit tests in both __DEV__ and prod mode

This suite of unittests use a `__DEV__` check in various places to check that the correct data is sent to either LogBox (in __DEV__) or the Native ExceptionsManager (in PROD). However, we're not actually running both modes, so half of the assert branches in these tests aren't ever utilized.

This diff uses the same approach as ReactNativeVersionCheck-test.js to execute this test suite twice: Once in DEV and once in PROD mode.

Reviewed By: motiz88

Differential Revision: D36099190

fbshipit-source-id: 40b8ea26f1d9e093202f3c3f3b55111110a8d64c

Libraries/Core/__tests__/ExceptionsManager-test.js

@@ -26,7 +26,33 @@ const capturedErrorDefaults = {
   willRetry: false,
 };
 
-describe('ExceptionsManager', () => {
+describe('checkVersion', () => {
+  describe('in development', () => {
+    setDevelopmentModeForTests(true);
+    runExceptionsManagerTests();
+  });
+
+  describe('in production', () => {
+    setDevelopmentModeForTests(false);
+    runExceptionsManagerTests();
+  });
+});
+
+function setDevelopmentModeForTests(dev) {
+  let originalDev;
+
+  beforeAll(() => {
+    originalDev = global.__DEV__;
+    global.__DEV__ = dev;
+  });
+
+  afterAll(() => {
+    global.__DEV__ = originalDev;
+  });
+}
+
+function runExceptionsManagerTests() {
+  describe('ExceptionsManager', () => {
     let nativeReportException;
     let logBoxAddException;
 
@@ -193,7 +219,9 @@ describe('ExceptionsManager', () => {
         expect(exceptionData.componentStack).toBe(
           capturedErrorDefaults.componentStack,
         );
-      expect(exceptionData.stack[0].file).toMatch(/ReactFiberErrorDialog\.js$/);
+        expect(exceptionData.stack[0].file).toMatch(
+          /ReactFiberErrorDialog\.js$/,
+        );
         expect(exceptionData.isFatal).toBe(false);
         expect(logToConsoleInReact).toBe(false);
         expect(console.error).toBeCalledWith(formattedMessage);
@@ -225,7 +253,9 @@ describe('ExceptionsManager', () => {
         expect(exceptionData.componentStack).toBe(
           capturedErrorDefaults.componentStack,
         );
-      expect(exceptionData.stack[0].file).toMatch(/ReactFiberErrorDialog\.js$/);
+        expect(exceptionData.stack[0].file).toMatch(
+          /ReactFiberErrorDialog\.js$/,
+        );
         expect(exceptionData.isFatal).toBe(false);
         expect(logToConsoleInReact).toBe(false);
         expect(console.error).toBeCalledWith(formattedMessage);
@@ -375,7 +405,9 @@ describe('ExceptionsManager', () => {
           expect(nativeReportException.mock.calls.length).toBe(1);
           exceptionData = nativeReportException.mock.calls[0][0];
         }
-      expect(exceptionData.message).toBe('console.error: Some error happened');
+        expect(exceptionData.message).toBe(
+          'console.error: Some error happened',
+        );
         expect(exceptionData.originalMessage).toBe('Some error happened');
         expect(exceptionData.name).toBe('console.error');
         expect(
@@ -439,7 +471,9 @@ describe('ExceptionsManager', () => {
 
       test('logging a warning-looking object', () => {
         // Forces `strignifySafe` to invoke `toString()`.
-      const object = {toString: () => 'Warning: Some error may have happened'};
+        const object = {
+          toString: () => 'Warning: Some error may have happened',
+        };
         object.cycle = object;
 
         const args = [object];
@@ -789,7 +823,9 @@ describe('ExceptionsManager', () => {
           );
         }
         expect(mockError).toHaveBeenCalledTimes(1);
-      expect(mockError.mock.calls[0][0]).toMatch(/Error: Some error happened/);
+        expect(mockError.mock.calls[0][0]).toMatch(
+          /Error: Some error happened/,
+        );
       });
 
       test('can handle throwing decorators recursion when exception is logged', () => {
@@ -820,8 +856,8 @@ describe('ExceptionsManager', () => {
         );
       });
     });
-});
+  });
-
+}
 const linesByFile = new Map();
 
 function getLineFromFrame({lineNumber /* 1-based */, file}) {