Respect the 206 paged response from the server group logs endpoint.

Prevent the deduplicate message logic firing and log it if it does.

libsignal/service/src/test/java/org/whispersystems/signalservice/internal/push/ContentRange_parse_Test.java

@@ -0,0 +1,49 @@
+package org.whispersystems.signalservice.internal.push;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(Parameterized.class)
+public final class ContentRange_parse_Test {
+
+  @Parameterized.Parameter(0)
+  public String input;
+
+  @Parameterized.Parameter(1)
+  public int expectedRangeStart;
+
+  @Parameterized.Parameter(2)
+  public int expectedRangeEnd;
+
+  @Parameterized.Parameter(3)
+  public int expectedSize;
+
+  @Parameterized.Parameters(name = "Content-Range: \"{0}\"")
+  public static Collection<Object[]> data() {
+    return Arrays.asList(new Object[][]{
+      { "versions 1-2/3",     1,  2,  3 },
+      { "versions 23-45/67", 23, 45, 67 },
+    });
+  }
+
+  @Test
+  public void rangeStart() {
+    assertEquals(expectedRangeStart, ContentRange.parse(input).get().getRangeStart());
+  }
+
+  @Test
+  public void rangeEnd() {
+    assertEquals(expectedRangeEnd, ContentRange.parse(input).get().getRangeEnd());
+  }
+
+  @Test
+  public void totalSize() {
+    assertEquals(expectedSize, ContentRange.parse(input).get().getTotalSize());
+  }
+}

libsignal/service/src/test/java/org/whispersystems/signalservice/internal/push/ContentRange_parse_withInvalidStrings_Test.java

@@ -0,0 +1,34 @@
+package org.whispersystems.signalservice.internal.push;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import static org.junit.Assert.assertFalse;
+
+@RunWith(Parameterized.class)
+public final class ContentRange_parse_withInvalidStrings_Test {
+
+  @Parameterized.Parameter(0)
+  public String input;
+
+  @Parameterized.Parameters(name = "Content-Range: \"{0}\"")
+  public static Collection<Object[]> data() {
+    return Arrays.asList(new Object[][]{
+      { null },
+      { "" },
+      { "23-45/67" },
+      { "ersions 23-45/67" },
+      { "versions 23-45" },
+      { "versions a-b/c" }
+    });
+  }
+
+  @Test
+  public void parse_should_be_absent() {
+    assertFalse(ContentRange.parse(input).isPresent());
+  }
+}