Add test for SampleSetRandomSampleSelector

tests/DrupalReleaseDate/Tests/Sampling/SampleSetRandomSampleSelectorTest.php

@@ -0,0 +1,77 @@
+<?php
+namespace DrupalReleaseDate\Sampling\Tests;
+
+use DrupalReleaseDate\Sampling\Sample;
+use DrupalReleaseDate\Sampling\SampleSet;
+use DrupalReleaseDate\Sampling\SampleSetRandomSampleSelector;
+
+class SampleSetRandomSampleSelectorTest extends \PHPUnit_Framework_TestCase
+{
+
+    protected $sampleSetStub;
+    protected $randomStub;
+    protected $sampleSelector;
+
+    protected function setUp() {
+        $this->sampleSetStub = $this->getMock('\DrupalReleaseDate\Sampling\SampleSet');
+
+        $this->randomStub = $this->getMockBuilder('\DrupalReleaseDate\Random\Random')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->sampleSelector = new SampleSetRandomSampleSelector($this->sampleSetStub, $this->randomStub);
+    }
+    /**
+     * Test that the last item is requested from the sample set and returned to
+     * the caller.
+     *
+     * @covers \DrupalReleaseDate\Sampling\SampleSetRandomSampleSelector
+     */
+    public function testGetLast()
+    {
+        $expectedObject = new \stdClass;
+
+        $this->sampleSetStub->method('getLast')
+             ->willReturn($expectedObject);
+
+        $this->sampleSetStub->expects($this->once())
+            ->method('getLast');
+
+        $this->assertSame($expectedObject, $this->sampleSelector->getLastSample());
+    }
+
+    /**
+     * Test that the selector gets and returns the appropriate sample based on
+     * the provided random generator.
+     *
+     * @covers \DrupalReleaseDate\Sampling\SampleSetRandomSampleSelector
+     */
+    public function testGetRandom()
+    {
+
+        $this->randomStub->method('generate')
+            ->will($this->onConsecutiveCalls(1, 2, 4));
+
+        $this->sampleSetStub->expects($this->exactly(3))
+                 ->method('get')
+                 ->withConsecutive(
+                    array($this->equalTo(1)),
+                    array($this->equalTo(2)),
+                    array($this->equalTo(4))
+                );
+
+        $expected1 = new \stdClass;
+        $expected2 = new \stdClass;
+        $expected3 = new \stdClass;
+        $this->sampleSetStub->method('get')
+            ->will($this->onConsecutiveCalls(
+                $expected1,
+                $expected2,
+                $expected3
+            ));
+
+        $this->assertSame($expected1, $this->sampleSelector->getRandomSample());
+        $this->assertSame($expected2, $this->sampleSelector->getRandomSample());
+        $this->assertSame($expected3, $this->sampleSelector->getRandomSample());
+    }
+}