Add assertions to integration tests

integration-tests/__tests__/__snapshots__/each.test.js.snap

@@ -0,0 +1,212 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`shows error message when not enough arguments are supplied to tests 1`] = `
+"FAIL __tests__/each-exception.test.js
+  ✕ throws exception when not enough arguments are supplied $left == $right
+  ✓ throws exception when not enough arguments are supplied true == true
+
+  ● throws exception when not enough arguments are supplied $left == $right
+
+    Tagged Template Literal test error:
+    Not enough arguments supplied for given headings: left | right
+    Received: true,true,true
+      
+      at packages/jest-jasmine2/build/each.js:75:17
+
+"
+`;
+
+exports[`shows only the tests with .only as being ran 1`] = `
+"PASS __tests__/each-only.test.js
+  ✓ passes one row expected true == true
+  ✓ passes one row expected true == true
+  ✓ passes one row expected true == true
+  ✓ passes one row expected true == true
+  ○ skipped 4 tests
+
+"
+`;
+
+exports[`shows only the tests without .skip as being ran 1`] = `
+"PASS __tests__/each-skip.test.js
+  ✓ passes one row expected true == true
+  ✓ passes one row expected true == true
+  ✓ passes one row expected true == true
+  ✓ passes one row expected true == true
+  ○ skipped 4 tests
+
+"
+`;
+
+exports[`shows the correct errors in stderr when failing tests 1`] = `
+"FAIL __tests__/failure.test.js
+  ✓ fails one row expected true == true
+  ✕ fails one row expected true == false
+  ✕ fails all rows expected true == false
+  ✕ fails all rows expected true == false
+  ✕ fails one row expected true == false
+  ✓ fails one row expected true == true
+  ✕ fails all rows expected true == false
+  ✓ fails all rows expected true == true
+  fails all rows expected false == true
+    ✕ fails
+    ✕ fails
+  fails all rows expected true == false
+    ✕ fails
+    ✕ fails 
+
+  ● fails one row expected true == false
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+       9 |   'fails one row expected %s == %s',
+      10 |   (left, right) => {
+    > 11 |     expect(left).toBe(right);
+         |                  ^
+      12 |   }
+      13 | );
+      14 | 
+      
+      at __tests__/failure.test.js:11:18
+
+  ● fails all rows expected true == false
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+      16 |   'fails all rows expected %s == %s',
+      17 |   (left, right) => {
+    > 18 |     expect(left).toBe(right);
+         |                  ^
+      19 |   }
+      20 | );
+      21 | 
+      
+      at __tests__/failure.test.js:18:18
+
+  ● fails all rows expected true == false
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+      16 |   'fails all rows expected %s == %s',
+      17 |   (left, right) => {
+    > 18 |     expect(left).toBe(right);
+         |                  ^
+      19 |   }
+      20 | );
+      21 | 
+      
+      at __tests__/failure.test.js:18:18
+
+  ● fails all rows expected false == true › fails
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: true
+    Received: false
+
+      24 |   (left, right) => {
+      25 |     it('fails', () => {
+    > 26 |       expect(left).toBe(right);
+         |                    ^
+      27 |     });
+      28 |   }
+      29 | );
+      
+      at __tests__/failure.test.js:26:20
+
+  ● fails all rows expected true == false › fails
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+      24 |   (left, right) => {
+      25 |     it('fails', () => {
+    > 26 |       expect(left).toBe(right);
+         |                    ^
+      27 |     });
+      28 |   }
+      29 | );
+      
+      at __tests__/failure.test.js:26:20
+
+  ● fails one row expected true == false
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+      34 |   \${true} | \${true}
+      35 | \`('fails one row expected $left == $right', ({left, right}) => {
+    > 36 |   expect(left).toBe(right);
+         |                ^
+      37 | });
+      38 | 
+      39 | it.each\`
+      
+      at __tests__/failure.test.js:36:16
+
+  ● fails all rows expected true == false
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+      42 |   \${true} | \${true}
+      43 | \`('fails all rows expected $left == $right', ({left, right}) => {
+    > 44 |   expect(left).toBe(right);
+         |                ^
+      45 | });
+      46 | 
+      47 | describe.each\`
+      
+      at __tests__/failure.test.js:44:16
+
+  ● fails all rows expected true == false › fails 
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: false
+    Received: true
+
+      51 | \`('fails all rows expected $left == $right', ({left, right}) => {
+      52 |   it('fails ', () => {
+    > 53 |     expect(left).toBe(right);
+         |                  ^
+      54 |   });
+      55 | });
+      56 | 
+      
+      at __tests__/failure.test.js:53:18
+
+  ● fails all rows expected false == true › fails 
+
+    expect(received).toBe(expected) // Object.is equality
+    
+    Expected: true
+    Received: false
+
+      51 | \`('fails all rows expected $left == $right', ({left, right}) => {
+      52 |   it('fails ', () => {
+    > 53 |     expect(left).toBe(right);
+         |                  ^
+      54 |   });
+      55 | });
+      56 | 
+      
+      at __tests__/failure.test.js:53:18
+
+"
+`;

integration-tests/__tests__/each.test.js

@@ -0,0 +1,73 @@
+/**
+ * Copyright (c) 2018-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+'use strict';
+
+const path = require('path');
+const SkipOnWindows = require('../../scripts/SkipOnWindows');
+const runJest = require('../runJest');
+const {extractSummary} = require('../Utils');
+const dir = path.resolve(__dirname, '../each');
+
+SkipOnWindows.suite();
+
+test('works with passing tests', () => {
+  const result = runJest(dir, ['success.test.js']);
+  expect(result.status).toBe(0);
+});
+
+test('shows error message when not enough arguments are supplied to tests', () => {
+  const result = runJest(dir, ['each-exception.test.js']);
+  const rest = extractSummary(result.stderr)
+    .rest.split('\n')
+    .filter(line => line.indexOf('packages/expect/build/index.js') === -1)
+    .join('\n');
+
+  expect(result.status).toBe(1);
+  expect(rest).toMatchSnapshot();
+});
+
+test('shows the correct errors in stderr when failing tests', () => {
+  const result = runJest(dir, ['failure.test.js']);
+
+  expect(result.status).toBe(1);
+
+  const rest = extractSummary(result.stderr)
+    .rest.split('\n')
+    .filter(line => line.indexOf('packages/expect/build/index.js') === -1)
+    .join('\n');
+
+  expect(rest).toMatchSnapshot();
+});
+
+test('shows only the tests with .only as being ran', () => {
+  const result = runJest(dir, ['each-only.test.js']);
+
+  expect(result.status).toBe(0);
+
+  const rest = extractSummary(result.stderr)
+    .rest.split('\n')
+    .filter(line => line.indexOf('packages/expect/build/index.js') === -1)
+    .join('\n');
+
+  expect(rest).toMatchSnapshot();
+});
+
+test('shows only the tests without .skip as being ran', () => {
+  const result = runJest(dir, ['each-skip.test.js']);
+
+  expect(result.status).toBe(0);
+
+  const rest = extractSummary(result.stderr)
+    .rest.split('\n')
+    .filter(line => line.indexOf('packages/expect/build/index.js') === -1)
+    .join('\n');
+
+  expect(rest).toMatchSnapshot();
+});