Open-source some query2 and skyframe tests

Open-source these files:
- lib/query2/LexerTest.java
- lib/query2/QueryParserTest.java
- lib/skyframe/CollectPackagesUnderDirectoryCodecTest.java
- lib/skyframe/PrepareDepsOfPatternFunctionTest.java
- lib/skyframe/PrepareDepsOfTargetsUnderDirectoryKeyCodecTest.java
- lib/skyframe/SequencedSkyframeExecutorTest.java
- lib/skyframe/SkylarkImportLookupKeyCodecTest.java
- lib/skyframe/TargetPatternSequenceCodecTest.java
- lib/skyframe/TestSuiteExpansionKeyCodecTest.java

PiperOrigin-RevId: 293569075
diff --git a/src/test/java/com/google/devtools/build/lib/skyframe/TargetPatternSequenceCodecTest.java b/src/test/java/com/google/devtools/build/lib/skyframe/TargetPatternSequenceCodecTest.java
new file mode 100644
index 0000000..9ab6f49
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/skyframe/TargetPatternSequenceCodecTest.java
@@ -0,0 +1,62 @@
+// Copyright 2020 The Bazel Authors. All rights reserved.
+//
+// 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 com.google.devtools.build.lib.skyframe;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.skyframe.PrepareDepsOfPatternsValue.TargetPatternSequence;
+import com.google.devtools.build.lib.skyframe.serialization.SerializationContext;
+import com.google.devtools.build.lib.skyframe.serialization.testutils.SerializationTester;
+import com.google.protobuf.CodedOutputStream;
+import java.io.ByteArrayOutputStream;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Tests for {@link TargetPatternSequence_AutoCodec}. */
+@RunWith(JUnit4.class)
+public final class TargetPatternSequenceCodecTest {
+  @Test
+  public void testCodec() throws Exception {
+    new SerializationTester(
+            TargetPatternSequence.create(ImmutableList.of(), ""),
+            TargetPatternSequence.create(ImmutableList.of("foo", "bar"), "baz"),
+            TargetPatternSequence.create(ImmutableList.of("uno", "dos"), "tres"),
+            TargetPatternSequence.create(ImmutableList.of("dos", "uno"), "tres"))
+        .runTests();
+  }
+
+  @Test
+  public void testPatternsOrderSignificant() throws Exception {
+    SerializationContext writeContext = new SerializationContext(ImmutableMap.of());
+
+    ByteArrayOutputStream outputBytes = new ByteArrayOutputStream();
+    CodedOutputStream codedOut = CodedOutputStream.newInstance(outputBytes);
+    writeContext.serialize(
+        TargetPatternSequence.create(ImmutableList.of("uno", "dos"), "tres"), codedOut);
+    codedOut.flush();
+    byte[] serialized1 = outputBytes.toByteArray();
+    assertThat(serialized1).asList().isNotEmpty();
+    outputBytes.reset();
+    codedOut = CodedOutputStream.newInstance(outputBytes);
+    writeContext.serialize(
+        TargetPatternSequence.create(ImmutableList.of("dos", "uno"), "tres"), codedOut);
+    codedOut.flush();
+    byte[] serialized2 = outputBytes.toByteArray();
+    assertThat(serialized2).asList().isNotEmpty();
+    assertThat(serialized1).isNotEqualTo(serialized2);
+  }
+}