Add support for signal.me links.

app/src/test/java/org/thoughtcrime/securesms/util/SignalMeUtilText_parseE164FromLink.java

@@ -0,0 +1,50 @@
+package org.thoughtcrime.securesms.util;
+
+import android.app.Application;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.ParameterizedRobolectricTestRunner;
+import org.robolectric.annotation.Config;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import static junit.framework.TestCase.assertEquals;
+
+@RunWith(ParameterizedRobolectricTestRunner.class)
+@Config(manifest = Config.NONE, application = Application.class)
+public class SignalMeUtilText_parseE164FromLink {
+
+  private final String input;
+  private final String output;
+
+  @ParameterizedRobolectricTestRunner.Parameters
+  public static Collection<Object[]> data() {
+    return Arrays.asList(new Object[][]{
+        { "https://signal.me/#p/+15555555555", "+15555555555" },
+        { "https://signal.me/#p/5555555555",   null },
+        { "https://signal.me",                 null },
+        { "https://signal.me/#p/",             null },
+        { "signal.me/#p/+15555555555",         null },
+        { "sgnl://signal.me/#p/+15555555555",  "+15555555555" },
+        { "sgnl://signal.me/#p/5555555555",    null },
+        { "sgnl://signal.me",                  null },
+        { "sgnl://signal.me/#p/",              null },
+        { "",                                  null },
+        { null,                                null }
+    });
+  }
+
+  public SignalMeUtilText_parseE164FromLink(String input, String output) {
+    this.input  = input;
+    this.output = output;
+  }
+
+  @Test
+  public void parse() {
+    assertEquals(output, SignalMeUtil.parseE164FromLink(ApplicationProvider.getApplicationContext(), input));
+  }
+}