1 files changed, 210 insertions, 0 deletions
diff --git a/okio/src/jvmTest/java/okio/InflaterSourceTest.java b/okio/src/jvmTest/java/okio/InflaterSourceTest.java
new file mode 100644
index 00000000..0486638d
--- /dev/null
+++ b/okio/src/jvmTest/java/okio/InflaterSourceTest.java
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2014 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package okio;
+
+import java.io.EOFException;
+import java.io.IOException;
+import java.util.List;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.Inflater;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+import static kotlin.text.StringsKt.repeat;
+import static okio.TestUtil.SEGMENT_SIZE;
+import static okio.TestUtil.randomBytes;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeFalse;
+
+@RunWith(Parameterized.class)
+public final class InflaterSourceTest {
+  /**
+   * Use a parameterized test to control how many bytes the InflaterSource gets with each request
+   * for more bytes.
+   */
+  @Parameters(name = "{0}")
+  public static List<Object[]> parameters() {
+    return BufferedSourceFactory.Companion.getPARAMETERIZED_TEST_VALUES();
+  }
+
+  public final BufferedSourceFactory bufferFactory;
+  public BufferedSink deflatedSink;
+  public BufferedSource deflatedSource;
+
+  public InflaterSourceTest(BufferedSourceFactory bufferFactory) {
+    this.bufferFactory = bufferFactory;
+    resetDeflatedSourceAndSink();
+  }
+
+  private void resetDeflatedSourceAndSink() {
+    BufferedSourceFactory.Pipe pipe = bufferFactory.pipe();
+    this.deflatedSink = pipe.getSink();
+    this.deflatedSource = pipe.getSource();
+  }
+
+  @Test public void inflate() throws Exception {
+    decodeBase64("eJxzz09RyEjNKVAoLdZRKE9VL0pVyMxTKMlIVchIzEspVshPU0jNS8/MS00tKtYDAF6CD5s=");
+    Buffer inflated = inflate(deflatedSource);
+    assertEquals("God help us, we're in the hands of engineers.", inflated.readUtf8());
+  }
+
+  @Test public void inflateTruncated() throws Exception {
+    decodeBase64("eJxzz09RyEjNKVAoLdZRKE9VL0pVyMxTKMlIVchIzEspVshPU0jNS8/MS00tKtYDAF6CDw==");
+    try {
+      inflate(deflatedSource);
+      fail();
+    } catch (EOFException expected) {
+    }
+  }
+
+  @Test public void inflateWellCompressed() throws Exception {
+    decodeBase64("eJztwTEBAAAAwqCs61/CEL5AAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+        + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB8BtFeWvE=");
+    String original = repeat("a", 1024 * 1024);
+    deflate(ByteString.encodeUtf8(original));
+    Buffer inflated = inflate(deflatedSource);
+    assertEquals(original, inflated.readUtf8());
+  }
+
+  @Test public void inflatePoorlyCompressed() throws Exception {
+    assumeFalse(bufferFactory.isOneByteAtATime()); // 8 GiB for 1 byte per segment!
+
+    ByteString original = randomBytes(1024 * 1024);
+    deflate(original);
+    Buffer inflated = inflate(deflatedSource);
+    assertEquals(original, inflated.readByteString());
+  }
+
+  @Test public void inflateIntoNonemptySink() throws Exception {
+    for (int i = 0; i < SEGMENT_SIZE; i++) {
+      resetDeflatedSourceAndSink();
+      Buffer inflated = new Buffer().writeUtf8(repeat("a", i));
+      deflate(ByteString.encodeUtf8("God help us, we're in the hands of engineers."));
+      InflaterSource source = new InflaterSource(deflatedSource, new Inflater());
+      while (source.read(inflated, Integer.MAX_VALUE) != -1) {
+      }
+      inflated.skip(i);
+      assertEquals("God help us, we're in the hands of engineers.", inflated.readUtf8());
+    }
+  }
+
+  @Test public void inflateSingleByte() throws Exception {
+    Buffer inflated = new Buffer();
+    decodeBase64("eJxzz09RyEjNKVAoLdZRKE9VL0pVyMxTKMlIVchIzEspVshPU0jNS8/MS00tKtYDAF6CD5s=");
+    InflaterSource source = new InflaterSource(deflatedSource, new Inflater());
+    source.read(inflated, 1);
+    source.close();
+    assertEquals("G", inflated.readUtf8());
+    assertEquals(0, inflated.size());
+  }
+
+  @Test public void inflateByteCount() throws Exception {
+    assumeFalse(bufferFactory.isOneByteAtATime()); // This test assumes one step.
+
+    Buffer inflated = new Buffer();
+    decodeBase64("eJxzz09RyEjNKVAoLdZRKE9VL0pVyMxTKMlIVchIzEspVshPU0jNS8/MS00tKtYDAF6CD5s=");
+    InflaterSource source = new InflaterSource(deflatedSource, new Inflater());
+    source.read(inflated, 11);
+    source.close();
+    assertEquals("God help us", inflated.readUtf8());
+    assertEquals(0, inflated.size());
+  }
+
+  @Test public void sourceExhaustedPrematurelyOnRead() throws Exception {
+    // Deflate 0 bytes of data that lacks the in-stream terminator.
+    decodeBase64("eJwAAAD//w==");
+
+    Buffer inflated = new Buffer();
+    Inflater inflater = new Inflater();
+    InflaterSource source = new InflaterSource(deflatedSource, inflater);
+    assertThat(deflatedSource.exhausted()).isFalse();
+    try {
+      source.read(inflated, Long.MAX_VALUE);
+      fail();
+    } catch (EOFException expected) {
+      assertThat(expected).hasMessage("source exhausted prematurely");
+    }
+
+    // Despite the exception, the read() call made forward progress on the underlying stream!
+    assertThat(deflatedSource.exhausted()).isTrue();
+  }
+
+  /**
+   * Confirm that {@link InflaterSource#readOrInflate} consumes a byte on each call even if it
+   * doesn't produce a byte on every call.
+   */
+  @Test public void readOrInflateMakesByteByByteProgress() throws Exception {
+    // Deflate 0 bytes of data that lacks the in-stream terminator.
+    decodeBase64("eJwAAAD//w==");
+    int deflatedByteCount = 7;
+
+    Buffer inflated = new Buffer();
+    Inflater inflater = new Inflater();
+    InflaterSource source = new InflaterSource(deflatedSource, inflater);
+    assertThat(deflatedSource.exhausted()).isFalse();
+
+    if (bufferFactory.isOneByteAtATime()) {
+      for (int i = 0; i < deflatedByteCount; i++) {
+        assertThat(inflater.getBytesRead()).isEqualTo(i);
+        assertThat(source.readOrInflate(inflated, Long.MAX_VALUE)).isEqualTo(0L);
+      }
+    } else {
+      assertThat(source.readOrInflate(inflated, Long.MAX_VALUE)).isEqualTo(0L);
+    }
+
+    assertThat(inflater.getBytesRead()).isEqualTo(deflatedByteCount);
+    assertThat(deflatedSource.exhausted());
+  }
+
+  private void decodeBase64(String s) throws IOException {
+    deflatedSink.write(ByteString.decodeBase64(s));
+    deflatedSink.flush();
+  }
+
+  /** Use DeflaterOutputStream to deflate source. */
+  private void deflate(ByteString source) throws IOException {
+    Sink sink = Okio.sink(new DeflaterOutputStream(deflatedSink.outputStream()));
+    sink.write(new Buffer().write(source), source.size());
+    sink.close();
+  }
+
+  /** Returns a new buffer containing the inflated contents of {@code deflated}. */
+  private Buffer inflate(BufferedSource deflated) throws IOException {
+    Buffer result = new Buffer();
+    InflaterSource source = new InflaterSource(deflated, new Inflater());
+    while (source.read(result, Integer.MAX_VALUE) != -1) {
+    }
+    return result;
+  }
+}