Merge pull request #59 from artemv/custom-commands

feat: allow 'pretest' to be custom command, too

README.md

@@ -140,13 +140,24 @@ was working before the update. If this sounds excessive to you you can disable i
     "name": "foo-module-name",
     "test": "grunt test",
     "pretest": false
-  },
-  "bar-name"
+  }
 ]
 ```
 Here "foo-module-name" module will be tested only once, and "bar-name" twise: first with its published version of 
 current module, and then with the updated version.   
 
+The "pretest" property can also accept custom script to run for pretesting:
+```
+[
+  {
+    "name": "foo-module-name",
+    "test": "grunt test",
+    "pretest": "grunt test && ./ci/after-pretesting-by-dont-break"
+  }
+]
+```
+By default it equals to "test" command.
+
 ### Post-install command
 
 Before testing the dependent package dont-break installs its dev dependencies via `npm install` command run from the

src/dont-break.js

@@ -284,9 +284,16 @@ function testDependent (options, dependent) {
     })
 
   if (testWithPreviousVersion) {
+    var modulePretestCommand
+    if (check.type('string', testWithPreviousVersion)) {
+      modulePretestCommand = testWithPreviousVersion
+    } else {
+      modulePretestCommand = moduleTestCommand
+    }
+    var pretestModuleInFolder = _.partial(testInFolder, modulePretestCommand)
     res = res
       .then(postInstallModuleInFolder)
-      .then(testModuleInFolder)
+      .then(pretestModuleInFolder)
   }
 
   return res