Introduce a filter for correcting numeric "online" flags

service/src/test/java/org/whispersystems/textsecuregcm/controllers/AcceptNumericOnlineFlagRequestFilterTest.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2013-2021 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.whispersystems.textsecuregcm.controllers;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import io.dropwizard.testing.junit5.DropwizardExtensionsSupport;
+import io.dropwizard.testing.junit5.ResourceExtension;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.QueryParam;
+import org.glassfish.jersey.test.grizzly.GrizzlyWebTestContainerFactory;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+@ExtendWith(DropwizardExtensionsSupport.class)
+class AcceptNumericOnlineFlagRequestFilterTest {
+
+  @Path("/test")
+  public static class TestResource {
+
+    @Path("/convert-boolean")
+    @GET
+    public boolean convertBoolean(@QueryParam("online") final boolean online) {
+      return online;
+    }
+
+    @Path("/no-conversion")
+    @GET
+    public boolean noConversion(@QueryParam("online") final boolean online) {
+      return online;
+    }
+  }
+
+  private static final ResourceExtension RESOURCE_EXTENSION = ResourceExtension.builder()
+      .addProvider(new AcceptNumericOnlineFlagRequestFilter("test/convert-boolean"))
+      .setTestContainerFactory(new GrizzlyWebTestContainerFactory())
+      .addResource(new TestResource())
+      .build();
+
+  @ParameterizedTest
+  @CsvSource({
+      "/test/convert-boolean, true,  true",
+      "/test/convert-boolean, false, false",
+      "/test/convert-boolean, 1,     true",
+      "/test/convert-boolean, 0,     false",
+      "/test/no-conversion,   true,  true",
+      "/test/no-conversion,   false, false",
+      "/test/no-conversion,   1,     false",
+      "/test/no-conversion,   0,     false"
+  })
+  void filter(final String path, final String value, final boolean expected) {
+    final boolean response =
+        RESOURCE_EXTENSION.getJerseyTest()
+            .target(path)
+            .queryParam("online", value)
+            .request()
+            .get(boolean.class);
+
+    assertEquals(expected, response);
+  }
+}