Add test for updating email via import & ensuring it is primary

tests/phpunit/CRM/Contact/Import/Parser/ContactTest.php

@@ -162,10 +162,10 @@ public function testImportParserWithUpdateWithExternalIdentifier() {
    * @throws \Exception
    */
   public function testImportParserWithUpdateWithExternalIdentifierButNoPrimaryMatch() {
-    list($originalValues, $result) = $this->setUpBaseContact(array(
+    list($originalValues, $result) = $this->setUpBaseContact([
       'external_identifier' => 'windows',
       'email' => NULL,
-    ));
+    ]);
 
     $this->assertEquals('windows', $result['external_identifier']);
 
@@ -177,6 +177,28 @@ public function testImportParserWithUpdateWithExternalIdentifierButNoPrimaryMatc
     $this->callAPISuccessGetSingle('Contact', $originalValues);
   }
 
+  /**
+   * Test import parser will fallback to external identifier.
+   *
+   * In this case no primary match exists (e.g the details are not supplied) so it falls back on external identifier.
+   *
+   * CRM-17275
+   *
+   * @throws \Exception
+   */
+  public function testImportParserWithUpdateWithContactID() {
+    list($originalValues, $result) = $this->setUpBaseContact(array(
+      'external_identifier' => '',
+      'email' => NULL,
+    ));
+    $updateValues = ['id' => $result['id'], 'email' => 'bill@example.com'];
+
+    $this->runImport($updateValues, CRM_Import_Parser::DUPLICATE_UPDATE, CRM_Import_Parser::VALID, [NULL, 1]);
+    $originalValues['id'] = $result['id'];
+    $this->callAPISuccessGetSingle('Email', ['contact_id' => $originalValues['id'], 'is_primary' => 1]);
+    $this->callAPISuccessGetSingle('Contact', $originalValues);
+  }
+
   /**
    * Test that the import parser adds the external identifier where none is set.
    *