Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/breakpoint/tests/modules/breakpoint_module_test/breakpoint_module_test.breakpoints.yml

@@ -0,0 +1,21 @@
+breakpoint_module_test.mobile:
+  label: mobile
+  mediaQuery: '(min-width: 0px)'
+  weight: 1
+  # Don't include multipliers. A 1x multiplier this will be enforced by default.
+breakpoint_module_test.standard:
+  label: standard
+  mediaQuery: '(min-width: 560px)'
+  weight: 0
+  # Don't include a 1x multiplier this will be enforced by default.
+  multipliers:
+    - 2x
+# Test providing a breakpoint for group matching the group provided by
+# breakpoint_test_theme.
+breakpoint_module_test.breakpoint_theme_test.group2.tv:
+  label: tv
+  mediaQuery: '(min-width: 6000px)'
+  weight: 0
+  multipliers:
+    - 1x
+  group: breakpoint_theme_test.group2

core/modules/breakpoint/tests/modules/breakpoint_module_test/breakpoint_module_test.info.yml

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+name: 'Breakpoint test module'
+type: module
+description: 'Test module for breakpoint.'
+package: Testing
+version: VERSION
+core: 8.x
+

core/modules/breakpoint/tests/src/Unit/BreakpointTest.php

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+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\breakpoint\Unit\BreakpointTest.
+ */
+
+namespace Drupal\Tests\breakpoint\Unit;
+
+use Drupal\breakpoint\Breakpoint;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\breakpoint\Breakpoint
+ * @group Breakpoint
+ */
+class BreakpointTest extends UnitTestCase {
+
+  /**
+   * The used plugin ID.
+   *
+   * @var string
+   */
+  protected $pluginId = 'breakpoint';
+
+  /**
+   * The used plugin definition.
+   *
+   * @var array
+   */
+  protected $pluginDefinition = array(
+    'id' => 'breakpoint',
+  );
+
+  /**
+   * The breakpoint under test.
+   *
+   * @var \Drupal\breakpoint\Breakpoint
+   */
+  protected $breakpoint;
+
+  /**
+   * The mocked translator.
+   *
+   * @var \Drupal\Core\StringTranslation\TranslationInterface|\PHPUnit_Framework_MockObject_MockObject
+   */
+  protected $stringTranslation;
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->stringTranslation = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');
+  }
+
+  /**
+   * Sets up the breakpoint defaults.
+   */
+  protected function setupBreakpoint() {
+    $this->breakpoint = new Breakpoint(array(), $this->pluginId, $this->pluginDefinition);
+    $this->breakpoint->setStringTranslation($this->stringTranslation);
+  }
+
+  /**
+   * @covers ::getLabel
+   */
+  public function testGetLabel() {
+    $this->pluginDefinition['label'] = 'Test label';
+    $this->stringTranslation->expects($this->once())
+      ->method('translate')
+      ->with($this->pluginDefinition['label'], array(), array('context' => 'breakpoint'))
+      ->will($this->returnValue('Test label translated'));
+    $this->setupBreakpoint();
+    $this->assertEquals('Test label translated', $this->breakpoint->getLabel());
+  }
+
+  /**
+   * @covers ::getWeight
+   */
+  public function testGetWeight() {
+    $this->pluginDefinition['weight'] = '4';
+    $this->setupBreakpoint();
+    // Assert that the type returned in an integer.
+    $this->assertSame(4, $this->breakpoint->getWeight());
+  }
+
+  /**
+   * @covers ::getMediaQuery
+   */
+  public function testGetMediaQuery() {
+    $this->pluginDefinition['mediaQuery'] = 'only screen and (min-width: 1220px)';
+    $this->setupBreakpoint();
+    $this->assertEquals('only screen and (min-width: 1220px)', $this->breakpoint->getMediaQuery());
+  }
+
+  /**
+   * @covers ::getMultipliers
+   */
+  public function testGetMultipliers() {
+    $this->pluginDefinition['multipliers'] = array('1x', '2x');
+    $this->setupBreakpoint();
+    $this->assertSame(array('1x', '2x'), $this->breakpoint->getMultipliers());
+  }
+
+  /**
+   * @covers ::getProvider
+   */
+  public function testGetProvider() {
+    $this->pluginDefinition['provider'] = 'Breakpoint';
+    $this->setupBreakpoint();
+    $this->assertEquals('Breakpoint', $this->breakpoint->getProvider());
+  }
+
+  /**
+   * @covers ::getGroup
+   */
+  public function testGetGroup() {
+    $this->pluginDefinition['group'] = 'Breakpoint';
+    $this->setupBreakpoint();
+    $this->assertEquals('Breakpoint', $this->breakpoint->getGroup());
+  }
+
+}

core/modules/breakpoint/tests/themes/breakpoint_theme_test/breakpoint_theme_test.breakpoints.yml

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+breakpoint_theme_test.mobile:
+  label: mobile
+  mediaQuery: '(min-width: 0px)'
+  weight: 3
+  multipliers:
+    - 1x
+breakpoint_theme_test.narrow:
+  label: narrow
+  mediaQuery: '(min-width: 560px)'
+  weight: 2
+  multipliers:
+    - 1x
+# Out of order breakpoint to test sorting.
+breakpoint_theme_test.tv:
+  label: tv
+  mediaQuery: 'only screen and (min-width: 1220px)'
+  weight: 0
+  multipliers:
+    - 1x
+breakpoint_theme_test.wide:
+  label: wide
+  mediaQuery: '(min-width: 851px)'
+  weight: 1
+  multipliers:
+    - 1x
+breakpoint_theme_test.group2.narrow:
+  label: narrow
+  mediaQuery: '(min-width: 560px)'
+  weight: 2
+  multipliers:
+    - 1x
+    - 2x
+  group: breakpoint_theme_test.group2
+breakpoint_theme_test.group2.wide:
+  label: wide
+  mediaQuery: '(min-width: 851px)'
+  weight: 1
+  multipliers:
+    - 1x
+    - 2x
+  group: breakpoint_theme_test.group2

core/modules/breakpoint/tests/themes/breakpoint_theme_test/breakpoint_theme_test.info.yml

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+name: 'Breakpoint test theme'
+type: theme
+description: 'Test theme for breakpoint.'
+version: VERSION
+core: 8.x
+base theme: bartik