[jest-each] Feature: handle 1d array

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ### Features
 
+* `[jest-each]` Support one dimensional array of data ([#6351](https://github.com/facebook/jest/pull/6351))
 * `[jest-watch]` create new package `jest-watch` to ease custom watch plugin development ([#6318](https://github.com/facebook/jest/pull/6318))
 
 ### Fixes

e2e/__tests__/__snapshots__/each.test.js.snap

@@ -76,6 +76,9 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
   ✓ template table fails on one row expected: true == true
   ✕ template table fails on all rows expected: 1 == 2
   ✕ template table fails on all rows expected: 3 == 4
+  ✕ The word red contains the letter 'z'
+  ✕ The word green contains the letter 'z'
+  ✕ The word bean contains the letter 'z'
   template table describe fails on all rows expected a == b
     ✕ fails
   template table describe fails on all rows expected c == d
@@ -187,22 +190,73 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
 
       at __tests__/failure.test.js:40:18
 
+  ● The word red contains the letter 'z'
+
+    expect(received).toBe(expected) // Object.is equality
+
+    Expected: true
+    Received: false
+
+      45 |   \\"The word %s contains the letter 'z'\\",
+      46 |   word => {
+    > 47 |     expect(/z/.test(word)).toBe(true);
+         |                            ^
+      48 |   }
+      49 | );
+      50 |
+
+      at __tests__/failure.test.js:47:28
+
+  ● The word green contains the letter 'z'
+
+    expect(received).toBe(expected) // Object.is equality
+
+    Expected: true
+    Received: false
+
+      45 |   \\"The word %s contains the letter 'z'\\",
+      46 |   word => {
+    > 47 |     expect(/z/.test(word)).toBe(true);
+         |                            ^
+      48 |   }
+      49 | );
+      50 |
+
+      at __tests__/failure.test.js:47:28
+
+  ● The word bean contains the letter 'z'
+
+    expect(received).toBe(expected) // Object.is equality
+
+    Expected: true
+    Received: false
+
+      45 |   \\"The word %s contains the letter 'z'\\",
+      46 |   word => {
+    > 47 |     expect(/z/.test(word)).toBe(true);
+         |                            ^
+      48 |   }
+      49 | );
+      50 |
+
+      at __tests__/failure.test.js:47:28
+
   ● template table describe fails on all rows expected a == b › fails
 
     expect(received).toBe(expected) // Object.is equality
 
     Expected: \\"b\\"
     Received: \\"a\\"
 
-      50 |   ({left, right}) => {
-      51 |     it('fails ', () => {
-    > 52 |       expect(left).toBe(right);
+      57 |   ({left, right}) => {
+      58 |     it('fails ', () => {
+    > 59 |       expect(left).toBe(right);
          |                    ^
-      53 |     });
-      54 |   }
-      55 | );
+      60 |     });
+      61 |   }
+      62 | );
 
-      at __tests__/failure.test.js:52:20
+      at __tests__/failure.test.js:59:20
 
   ● template table describe fails on all rows expected c == d › fails
 
@@ -211,15 +265,15 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
     Expected: \\"d\\"
     Received: \\"c\\"
 
-      50 |   ({left, right}) => {
-      51 |     it('fails ', () => {
-    > 52 |       expect(left).toBe(right);
+      57 |   ({left, right}) => {
+      58 |     it('fails ', () => {
+    > 59 |       expect(left).toBe(right);
          |                    ^
-      53 |     });
-      54 |   }
-      55 | );
+      60 |     });
+      61 |   }
+      62 | );
 
-      at __tests__/failure.test.js:52:20
+      at __tests__/failure.test.js:59:20
 
   ● array table describe fails on all rows expected a == b › fails
 
@@ -228,15 +282,15 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
     Expected: \\"b\\"
     Received: \\"a\\"
 
-      59 |   (left, right) => {
-      60 |     it('fails', () => {
-    > 61 |       expect(left).toBe(right);
+      66 |   (left, right) => {
+      67 |     it('fails', () => {
+    > 68 |       expect(left).toBe(right);
          |                    ^
-      62 |     });
-      63 |   }
-      64 | );
+      69 |     });
+      70 |   }
+      71 | );
 
-      at __tests__/failure.test.js:61:20
+      at __tests__/failure.test.js:68:20
 
   ● array table describe fails on all rows expected c == d › fails
 
@@ -245,15 +299,15 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
     Expected: \\"d\\"
     Received: \\"c\\"
 
-      59 |   (left, right) => {
-      60 |     it('fails', () => {
-    > 61 |       expect(left).toBe(right);
+      66 |   (left, right) => {
+      67 |     it('fails', () => {
+    > 68 |       expect(left).toBe(right);
          |                    ^
-      62 |     });
-      63 |   }
-      64 | );
+      69 |     });
+      70 |   }
+      71 | );
 
-      at __tests__/failure.test.js:61:20
+      at __tests__/failure.test.js:68:20
 
 "
 `;

e2e/each/__tests__/failure.test.js

@@ -41,6 +41,13 @@ it.each`
   }
 );
 
+test.each(['red', 'green', 'bean'])(
+  "The word %s contains the letter 'z'",
+  word => {
+    expect(/z/.test(word)).toBe(true);
+  }
+);
+
 describe.each`
     left    | right
     ${'a'} | ${'b'}

e2e/each/__tests__/success.test.js

@@ -5,6 +5,13 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+test.each(['red', 'green', 'bean'])(
+  "The word %s contains the letter 'e'",
+  word => {
+    expect(/e/.test(word)).toBe(true);
+  }
+);
+
 it.each([[true, true], [true, true]])(
   'passes one row expected %s == %s',
   (left, right) => {

packages/jest-each/src/__tests__/array.test.js

@@ -93,7 +93,25 @@ describe('jest-each', () => {
         );
       });
 
-      test('calls global with cb function containing all parameters of each test case', () => {
+      test('calls global with cb function containing all parameters of each test case when given 1d array', () => {
+        const globalTestMocks = getGlobalTestMocks();
+        const testCallBack = jest.fn();
+        const eachObject = each.withGlobal(globalTestMocks)(['hello', 'world']);
+        const testFunction = get(eachObject, keyPath);
+        testFunction('expected string', testCallBack);
+
+        const globalMock = get(globalTestMocks, keyPath);
+
+        globalMock.mock.calls[0][1]();
+        expect(testCallBack).toHaveBeenCalledTimes(1);
+        expect(testCallBack).toHaveBeenCalledWith('hello');
+
+        globalMock.mock.calls[1][1]();
+        expect(testCallBack).toHaveBeenCalledTimes(2);
+        expect(testCallBack).toHaveBeenCalledWith('world');
+      });
+
+      test('calls global with cb function containing all parameters of each test case 2d array', () => {
         const globalTestMocks = getGlobalTestMocks();
         const testCallBack = jest.fn();
         const eachObject = each.withGlobal(globalTestMocks)([

packages/jest-each/src/bind.js

@@ -19,7 +19,9 @@ const RECEIVED_COLOR = chalk.red;
 export default (cb: Function) => (...args: any) =>
   function eachBind(title: string, test: Function): void {
     if (args.length === 1) {
-      const table: Table = args[0];
+      const table: Table = args[0].every(Array.isArray)
+        ? args[0]
+        : args[0].map(entry => [entry]);
       return table.forEach(row =>
         cb(util.format(title, ...row), applyRestParams(row, test)),
       );