Add send verification mail (#529)

diff --git a/packages/firebase_auth/CHANGELOG.md b/packages/firebase_auth/CHANGELOG.md
index 9ee0799..3746073 100644
--- a/packages/firebase_auth/CHANGELOG.md
+++ b/packages/firebase_auth/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.5.7
+
+* Added support to sendEmailVerification
+
 ## 0.5.6
 
 * Added support for linkWithFacebookCredential

diff --git a/packages/firebase_auth/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java b/packages/firebase_auth/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java
index a42c591..489b5fb 100755
--- a/packages/firebase_auth/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java
+++ b/packages/firebase_auth/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java

@@ -65,6 +65,9 @@
       case "sendPasswordResetEmail":
         handleSendPasswordResetEmail(call, result);
         break;
+      case "sendEmailVerification":
+        handleSendEmailVerification(call, result);
+        break;
       case "signInWithEmailAndPassword":
         handleSignInWithEmailAndPassword(call, result);
         break;
@@ -170,6 +173,13 @@
         .addOnCompleteListener(new TaskVoidCompleteListener(result));
   }
 
+  private void handleSendEmailVerification(MethodCall call, final Result result) {
+    firebaseAuth
+        .getCurrentUser()
+        .sendEmailVerification()
+        .addOnCompleteListener(new TaskVoidCompleteListener(result));
+  }
+
   private void handleSignInWithEmailAndPassword(MethodCall call, final Result result) {
     @SuppressWarnings("unchecked")
     Map<String, String> arguments = (Map<String, String>) call.arguments;

diff --git a/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m b/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
index 86df706..e2798e2 100644
--- a/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
+++ b/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m

@@ -99,6 +99,11 @@
                                 completion:^(NSArray<NSString *> *providers, NSError *error) {
                                   [self sendResult:result forProviders:providers error:error];
                                 }];
+  } else if ([@"sendEmailVerification" isEqualToString:call.method]) {
+    [[FIRAuth auth].currentUser sendEmailVerificationWithCompletion:^(NSError *_Nullable error) {
+      [self sendResult:result forProviders:nil error:error];
+    }];
+
   } else if ([@"sendPasswordResetEmail" isEqualToString:call.method]) {
     NSString *email = call.arguments[@"email"];
     [[FIRAuth auth] sendPasswordResetWithEmail:email

diff --git a/packages/firebase_auth/lib/firebase_auth.dart b/packages/firebase_auth/lib/firebase_auth.dart
index 1f814bb..a314728 100755
--- a/packages/firebase_auth/lib/firebase_auth.dart
+++ b/packages/firebase_auth/lib/firebase_auth.dart

@@ -78,6 +78,10 @@
     });
   }
 
+  Future<void> sendEmailVerification() async {
+    await FirebaseAuth.channel.invokeMethod('sendEmailVerification');
+  }
+
   @override
   String toString() {
     return '$runtimeType($_data)';

diff --git a/packages/firebase_auth/pubspec.yaml b/packages/firebase_auth/pubspec.yaml
index 27fca49..84a0c09 100755
--- a/packages/firebase_auth/pubspec.yaml
+++ b/packages/firebase_auth/pubspec.yaml

@@ -4,7 +4,7 @@
   and Twitter.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_auth
-version: 0.5.6
+version: 0.5.7
 
 flutter:
   plugin:

diff --git a/packages/firebase_auth/test/firebase_auth_test.dart b/packages/firebase_auth/test/firebase_auth_test.dart
index 07e9cdf..b849c9a 100755
--- a/packages/firebase_auth/test/firebase_auth_test.dart
+++ b/packages/firebase_auth/test/firebase_auth_test.dart

@@ -228,6 +228,25 @@
       );
     });
 
+    test('sendEmailVerification', () async {
+      final FirebaseUser user = await auth.currentUser();
+      await user.sendEmailVerification();
+
+      expect(
+        log,
+        <Matcher>[
+          isMethodCall(
+            'currentUser',
+            arguments: null,
+          ),
+          isMethodCall(
+            'sendEmailVerification',
+            arguments: null,
+          ),
+        ],
+      );
+    });
+
     test('sendPasswordResetEmail', () async {
       await auth.sendPasswordResetEmail(
         email: kMockEmail,