Add tests for some example code

.travis.yml

@@ -35,7 +35,7 @@ script:
     - packr
     - go test -v ./...
     - ./gen.sh
-    - if [[ $TRAVIS_OS_NAME == "linux" ]]; then docker build -t twirphp . && docker run --rm -it twirphp clientcompat -client clientcompat/compat.sh; fi
+    - if [[ $TRAVIS_OS_NAME == "linux" ]]; then docker build -t twirphp . && docker run --rm -it twirphp clientcompat -client clientcompat/compat.sh && docker run --rm -it twirphp vendorphp/bin/phpunit -v && docker run --rm -it twirphp vendorphp/bin/phpunit -v --group example; fi
 
 deploy:
     provider: script

composer.json

@@ -32,7 +32,8 @@
     "autoload-dev": {
         "psr-4": {
             "Tests\\Twirp\\": "php/tests/",
-            "": ["clientcompat/generated/", "example/generated/", "example/src/"]
+            "": ["clientcompat/generated/", "example/generated/", "example/src/"],
+            "Tests\\Twitch\\Twirp\\Example\\": "example/tests/"
         }
     },
     "config": {

example/tests/TwirpErrorTest.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace Tests\Twitch\Twirp\Example;
+
+use Twirp\ErrorCode;
+use Twitch\Twirp\Example\TwirpError;
+
+/**
+ * @group example
+ */
+final class TwirpErrorTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @test
+     */
+    public function it_has_a_code()
+    {
+        $error = new TwirpError('code', 'msg');
+
+        $this->assertEquals('code', $error->code());
+    }
+
+    /**
+     * @test
+     */
+    public function it_has_a_message()
+    {
+        $error = new TwirpError('code', 'msg');
+
+        $this->assertEquals('msg', $error->msg());
+    }
+
+    /**
+     * @test
+     */
+    public function it_has_metadata()
+    {
+        $error = new TwirpError('code', 'msg');
+        $error->withMeta('key', 'value');
+
+        $this->assertEquals('value', $error->meta('key'));
+        $this->assertEquals('', $error->meta('invalid_key'));
+    }
+
+    /**
+     * @test
+     */
+    public function it_has_a_map_of_metadata()
+    {
+        $error = new TwirpError('code', 'msg');
+        $error->withMeta('key', 'value');
+
+        $this->assertEquals(['key' => 'value'], $error->metaMap());
+    }
+
+    /**
+     * @test
+     */
+    public function it_creates_a_new_error()
+    {
+        $error = TwirpError::newError(ErrorCode::Unauthenticated, 'msg');
+
+        $this->assertEquals(ErrorCode::Unauthenticated, $error->code());
+        $this->assertEquals('msg', $error->msg());
+    }
+
+    /**
+     * @test
+     */
+    public function it_creates_an_internal_error_when_code_is_invalid()
+    {
+        $error = TwirpError::newError('code', 'msg');
+
+        $this->assertEquals(ErrorCode::Internal, $error->code());
+        $this->assertEquals('invalid error type code', $error->msg());
+    }
+
+    /**
+     * @test
+     */
+    public function it_creates_an_error_from_an_exception()
+    {
+        $exception = new \Exception('msg');
+        $error = TwirpError::errorFromException($exception);
+
+        $this->assertEquals(ErrorCode::Internal, $error->code());
+        $this->assertEquals('msg', $error->msg());
+    }
+}

phpunit.xml.dist

@@ -9,6 +9,9 @@
         <testsuite name="Twirp Test Suite">
             <directory>./php/tests/</directory>
         </testsuite>
+        <testsuite name="Twirp Example Test Suite">
+            <directory>./example/tests/</directory>
+        </testsuite>
     </testsuites>
 
     <filter>
@@ -19,4 +22,10 @@
             </exclude>
         </whitelist>
     </filter>
+
+    <groups>
+        <exclude>
+            <group>example</group>
+        </exclude>
+    </groups>
 </phpunit>