Add support for the columns option in console.table (facebook#48592)

Summary:
Pull Request resolved: facebook#48592

Changelog: [General][Added] Add support for the second parameter of `console.table` to specify a list of columns to print in the table.

Reviewed By: javache

Differential Revision: D67803665

fbshipit-source-id: 354476404bad7cd2d280c8b3d963d5acba41f86b

packages/polyfills/__tests__/console-itest.js

@@ -284,5 +284,67 @@ describe('console', () => {
         global.nativeLoggingHook = originalNativeLoggingHook;
       }
     });
+
+    it('should only print the selected columns, if specified (arrays)', () => {
+      const originalNativeLoggingHook = global.nativeLoggingHook;
+      const logFn = (global.nativeLoggingHook = jest.fn());
+
+      try {
+        console.table(
+          [
+            {first: 1, second: 2, third: 3},
+            {first: 4, second: 5},
+            {third: 7, fourth: 8},
+            {fifth: 9},
+          ],
+          // $FlowExpectedError[extra-arg]
+          ['first', 'fifth'],
+        );
+        expect(logFn).toHaveBeenCalledTimes(1);
+        expect(logFn.mock.lastCall).toEqual([
+          `
+| (index) | first | fifth |
+| ------- | ----- | ----- |
+| 0       | 1     |       |
+| 1       | 4     |       |
+| 2       |       |       |
+| 3       |       | 9     |`,
+          LOG_LEVELS.info,
+        ]);
+      } finally {
+        global.nativeLoggingHook = originalNativeLoggingHook;
+      }
+    });
+
+    it('should only print the selected columns, if specified (dictionaries)', () => {
+      const originalNativeLoggingHook = global.nativeLoggingHook;
+      const logFn = (global.nativeLoggingHook = jest.fn());
+
+      try {
+        console.table(
+          {
+            a: {first: 1, second: 2, third: 3},
+            b: {first: 4, second: 5},
+            c: {third: 7, fourth: 8},
+            d: {fifth: 9},
+          },
+          // $FlowExpectedError[extra-arg]
+          ['first', 'fifth'],
+        );
+        expect(logFn).toHaveBeenCalledTimes(1);
+        expect(logFn.mock.lastCall).toEqual([
+          `
+| (index) | first | fifth |
+| ------- | ----- | ----- |
+| a       | 1     |       |
+| b       | 4     |       |
+| c       |       |       |
+| d       |       | 9     |`,
+          LOG_LEVELS.info,
+        ]);
+      } finally {
+        global.nativeLoggingHook = originalNativeLoggingHook;
+      }
+    });
   });
 });

packages/polyfills/console.js

@@ -455,17 +455,18 @@ function formatCellValue(cell, key) {
   return '';
 }
 
-function consoleTablePolyfill(rows) {
+function consoleTablePolyfill(data, columns) {
+  var rows;
+
   // convert object -> array
-  if (Array.isArray(rows)) {
-    rows = rows.map((row, index) => {
+  if (Array.isArray(data)) {
+    rows = data.map((row, index) => {
       var processedRow = {};
       processedRow[INDEX_COLUMN_NAME] = String(index);
       Object.assign(processedRow, row);
       return processedRow;
     });
   } else {
-    var data = rows;
     rows = [];
     for (var key in data) {
       if (data.hasOwnProperty(key)) {
@@ -481,12 +482,16 @@ function consoleTablePolyfill(rows) {
     return;
   }
 
-  var columns = Array.from(
-    rows.reduce((columnSet, row) => {
-      Object.keys(row).forEach(key => columnSet.add(key));
-      return columnSet;
-    }, new Set()),
-  );
+  if (Array.isArray(columns)) {
+    columns = [INDEX_COLUMN_NAME].concat(columns);
+  } else {
+    columns = Array.from(
+      rows.reduce((columnSet, row) => {
+        Object.keys(row).forEach(key => columnSet.add(key));
+        return columnSet;
+      }, new Set()),
+    );
+  }
   var stringRows = [];
   var columnWidths = [];