import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

addon-sdk/source/test/addons/self/data/data.md

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+# hello world

addon-sdk/source/test/addons/self/main.js

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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const self = require("sdk/self");
+
+exports["test self.data.load"] = assert => {
+
+  assert.equal(self.data.load("data.md").trim(),
+               "# hello world",
+               "paths work");
+
+  assert.equal(self.data.load("./data.md").trim(),
+               "# hello world",
+               "relative paths work");
+};
+
+exports["test self.id"] = assert => {
+  assert.equal(self.id, "test-self@jetpack", "self.id should be correct.");
+};
+
+require("sdk/test/runner").runTestsFromModule(module);

addon-sdk/source/test/addons/self/package.json

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+{
+  "id": "test-self@jetpack",
+  "main": "./main.js",
+  "version": "0.0.1"
+}