Added some tests

types/nodegit/nodegit-tests.ts

@@ -1,9 +1,47 @@
 import * as Git from 'nodegit';
 
 Git.Repository.discover("startPath", 1, "ceilingDirs").then((string) => {
-  // Use string
+    // Use string
 });
 
 Git.Repository.init("path", true).then((repository) => {
-  // Use repository
+    // Use repository
 });
+
+const repo = new Git.Repository();
+const id = new Git.Oid();
+const ref = new Git.Reference();
+
+// AnnotatedCommit Tests
+
+Git.AnnotatedCommit.fromFetchhead(repo, "branch_name", "remote_url", id).then((annotatedCommit) => {
+    // Use annotatedCommit
+});
+
+Git.AnnotatedCommit.fromRef(repo, ref).then((annotatedCommit) => {
+    // Use annotatedCommit
+});
+
+Git.AnnotatedCommit.fromRevspec(repo, "revspec").then((annotatedCommit) => {
+    // Use annotatedCommit
+});
+
+Git.AnnotatedCommit.lookup(repo, id).then((annotatedCommit) => {
+    // Use annotatedCommit
+    annotatedCommit.free();
+    annotatedCommit.id();
+});
+
+// Attr tests
+
+let result = Git.Attr.addMacro(repo, "name", "values");
+
+Git.Attr.cacheFlush(repo);
+
+Git.Attr.get(repo, 1, "path", "name").then((string) => {
+    // Use string
+});
+
+let array = Git.Attr.getMany(repo, 1, "path", 1, "names");
+
+result = Git.Attr.value("attr");