diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ade14b9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.DS_Store
+npm-debug.log
+node_modules
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..e5b7652
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,2 @@
+## 0.1.0 - First Release
+* Allows to jump between a module and its tests
diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 0000000..8886bd4
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,20 @@
+Copyright (c) 2017 Valentin Mihov
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md b/README.md
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index 0000000..426a17d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# elixir-jump-around package
+
+A plugin which allows to jump between the module and its tests in a mix project. By default the keybinding for the toggle is with `Alt-G Alt-T` (mnemonic of "Go To Test").
diff --git a/keymaps/elixir-jump-around.json b/keymaps/elixir-jump-around.json
new file mode 100644
index 0000000..2ec4417
--- /dev/null
+++ b/keymaps/elixir-jump-around.json
@@ -0,0 +1,5 @@
+{
+  "atom-text-editor[data-grammar='source elixir']": {
+    "alt-g alt-t": "elixir-jump-around:toggle-test-file"
+  }
+}
diff --git a/lib/elixir-jump-around.js b/lib/elixir-jump-around.js
new file mode 100644
index 0000000..038ba59
--- /dev/null
+++ b/lib/elixir-jump-around.js
@@ -0,0 +1,49 @@
+'use babel';
+
+import { CompositeDisposable } from 'atom';
+const path = require('path');
+
+export default {
+
+  subscriptions: null,
+
+  activate(state) {
+    // Events subscribed to in atom's system can be easily cleaned up with a CompositeDisposable
+    this.subscriptions = new CompositeDisposable();
+
+    // Register command that toggles this view
+    this.subscriptions.add(atom.commands.add("atom-text-editor[data-grammar='source elixir']", {
+      'elixir-jump-around:toggle-test-file': () => this.toggle_test_file()
+    }));
+  },
+
+  deactivate() {
+    this.subscriptions.dispose();
+  },
+
+  toggle_test_file() {
+    currentFilePath = atom.workspace.getActiveTextEditor().getPath();
+    if (this.isTestFilePath(currentFilePath)) {
+      return atom.workspace.open(this.getModulePath(currentFilePath));
+    } else {
+      return atom.workspace.open(this.getTestPath(currentFilePath));
+    }
+  },
+
+  isTestFilePath(filePath) {
+    return atom.project.getPaths().find((rootPath) => {
+      console.log(rootPath);
+      relativePath = path.relative(rootPath, filePath);
+      console.log(`${relativePath} is the relative of ${filePath}`)
+      return relativePath.match(/^test\/.+_test\.exs$/);
+    });
+  },
+
+  getModulePath(filePath) {
+    return filePath.replace("test", "lib").replace(/_test\.exs$/, ".ex");
+  },
+
+  getTestPath(filePath) {
+    return filePath.replace("lib", "test").replace(/\.ex$/, "_test.exs");
+  }
+};
diff --git a/menus/elixir-jump-around.json b/menus/elixir-jump-around.json
new file mode 100644
index 0000000..3b74011
--- /dev/null
+++ b/menus/elixir-jump-around.json
@@ -0,0 +1,26 @@
+{
+  "context-menu": {
+    "atom-text-editor": [
+      {
+        "label": "Toggle test file and the module definiton",
+        "command": "elixir-jump-around:toggle-test-file"
+      }
+    ]
+  },
+  "menu": [
+    {
+      "label": "Packages",
+      "submenu": [
+        {
+          "label": "elixir-jump-around",
+          "submenu": [
+            {
+              "label": "Toggle Test File",
+              "command": "elixir-jump-around:toggle-test-file"
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..6cd27c8
--- /dev/null
+++ b/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "elixir-jump-around",
+  "main": "./lib/elixir-jump-around",
+  "version": "0.1.0",
+  "description": "Jump between modules and tests in an elixir mix projects",
+  "keywords": [
+  ],
+  "activationCommands": {
+    "atom-workspace": "elixir-jump-around:toggle-test-file"
+  },
+  "repository": "https://github.com/valo/elixir-jump-around",
+  "license": "MIT",
+  "engines": {
+    "atom": ">=1.0.0 <2.0.0"
+  },
+  "dependencies": {
+  }
+}
diff --git a/spec/elixir-jump-around-spec.js b/spec/elixir-jump-around-spec.js
new file mode 100644
index 0000000..78a0141
--- /dev/null
+++ b/spec/elixir-jump-around-spec.js
@@ -0,0 +1,43 @@
+'use babel';
+
+import ElixirJumpAround from '../lib/elixir-jump-around';
+
+// Use the command `window:run-package-specs` (cmd-alt-ctrl-p) to run specs.
+//
+// To run a specific `it` or `describe` block add an `f` to the front (e.g. `fit`
+// or `fdescribe`). Remove the `f` to unfocus the block.
+
+const path = require('path');
+const fs = require('fs');
+const PROJECT_ROOT = fs.mkdtempSync("/tmp/elixir-jump-around-");
+
+describe('ElixirJumpAround', () => {
+  let workspaceElement, activationPromise;
+
+  beforeEach(() => {
+    atom.project.setPaths([PROJECT_ROOT])
+
+    workspaceElement = atom.views.getView(atom.workspace);
+    activationPromise = atom.packages.activatePackage('elixir-jump-around');
+  });
+
+  describe('isTestFilePath', () => {
+    it('returns if the file is a test or not', () => {
+      expect(ElixirJumpAround.isTestFilePath(path.join(PROJECT_ROOT, "/lib/foo.ex"))).toBeFalsy();
+      expect(ElixirJumpAround.isTestFilePath(path.join(PROJECT_ROOT, "/lib/foo.ex"))).toBeFalsy();
+      expect(ElixirJumpAround.isTestFilePath(path.join(PROJECT_ROOT, "/test/foo_test.exs"))).toBeTruthy();
+    });
+  });
+
+  describe('getModulePath', () => {
+    it('returns the correct module path of a test file', () => {
+      expect(ElixirJumpAround.getModulePath(path.join(PROJECT_ROOT, "/test/foo_test.exs"))).toEqual(path.join(PROJECT_ROOT, "/lib/foo.ex"));
+    });
+  });
+
+  describe('getTestPath', () => {
+    it('returns the correct test path of a test file', () => {
+      expect(ElixirJumpAround.getTestPath(path.join(PROJECT_ROOT, "/lib/foo.ex"))).toEqual(path.join(PROJECT_ROOT, "/test/foo_test.exs"));
+    });
+  });
+});