1 files changed, 129 insertions, 0 deletions
diff --git a/tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger/GcovParserTest.java b/tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger/GcovParserTest.java
new file mode 100644
index 0000000000..85b069ef0e
--- /dev/null
+++ b/tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger/GcovParserTest.java
@@ -0,0 +1,129 @@
+// Copyright 2018 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.lcovmerger;
+
+import static com.google.common.truth.Truth.assertThat;
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.google.common.base.Joiner;
+import com.google.common.collect.ImmutableList;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.util.List;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@GcovParser}. */
+@RunWith(JUnit4.class)
+public class GcovParserTest {
+
+  private static final ImmutableList<String> GCOV_INFO_FILE =
+      ImmutableList.of(
+          "version: 8.1.0 20180103",
+          "cwd:/home/gcc/testcase",
+          "file:tmp.cpp",
+          "function:7,7,0,_ZN3FooIcEC2Ev",
+          "function:7,7,1,_ZN3FooIiEC2Ev",
+          "function:8,8,0,_ZN3FooIcE3incEv",
+          "function:8,8,2,_ZN3FooIiE3incEv",
+          "function:18,37,1,main",
+          "lcount:7,0,1",
+          "lcount:7,1,0",
+          "lcount:8,0,1",
+          "lcount:8,2,0",
+          "lcount:18,1,0",
+          "lcount:21,1,0",
+          "branch:21,taken",
+          "branch:21,nottaken",
+          "lcount:23,1,0",
+          "branch:23,taken",
+          "branch:23,nottaken",
+          "lcount:24,1,0",
+          "branch:24,taken",
+          "branch:24,nottaken",
+          "lcount:25,1,0",
+          "lcount:27,11,0",
+          "branch:27,taken",
+          "branch:27,taken",
+          "lcount:28,10,0",
+          "lcount:30,1,1",
+          "branch:30,nottaken",
+          "branch:30,taken",
+          "lcount:32,1,0",
+          "branch:32,nottaken",
+          "branch:32,taken",
+          "lcount:33,0,1",
+          "branch:33,notexec",
+          "branch:33,notexec",
+          "lcount:35,1,0",
+          "branch:35,taken",
+          "branch:35,nottaken",
+          "lcount:36,1,0");
+
+  @Test(expected = IOException.class)
+  public void testParseInvalidFile() throws IOException {
+    GcovParser.parse(new ByteArrayInputStream("Invalid gcov file".getBytes(UTF_8)));
+  }
+
+  @Test
+  public void testParseTracefileWithOneSourcefile() throws IOException {
+
+    List<SourceFileCoverage> sourceFiles =
+        GcovParser.parse(
+            new ByteArrayInputStream(Joiner.on("\n").join(GCOV_INFO_FILE).getBytes(UTF_8)));
+    assertThat(sourceFiles).hasSize(1);
+    assertGcovInfoFile(sourceFiles.get(0));
+  }
+
+  private void assertGcovInfoFile(SourceFileCoverage sourceFileCoverage) {
+    assertThat(sourceFileCoverage.sourceFileName()).isEqualTo("tmp.cpp");
+
+    assertThat(sourceFileCoverage.nrFunctionsFound()).isEqualTo(5);
+    assertThat(sourceFileCoverage.nrFunctionsHit()).isEqualTo(3);
+    assertThat(sourceFileCoverage.nrOfInstrumentedLines()).isEqualTo(14);
+    assertThat(sourceFileCoverage.nrOfLinesWithNonZeroExecution()).isEqualTo(13);
+    assertThat(sourceFileCoverage.nrBranchesFound()).isEqualTo(8);
+    assertThat(sourceFileCoverage.nrBranchesHit()).isEqualTo(7);
+
+    assertThat(sourceFileCoverage.getAllLineExecution())
+        .containsExactly(
+            LineCoverage.create(7, 1, null),
+            LineCoverage.create(8, 2, null),
+            LineCoverage.create(18, 1, null),
+            LineCoverage.create(21, 1, null),
+            LineCoverage.create(23, 1, null),
+            LineCoverage.create(24, 1, null),
+            LineCoverage.create(25, 1, null),
+            LineCoverage.create(27, 11, null),
+            LineCoverage.create(28, 10, null),
+            LineCoverage.create(30, 1, null),
+            LineCoverage.create(32, 1, null),
+            LineCoverage.create(33, 0, null),
+            LineCoverage.create(35, 1, null),
+            LineCoverage.create(36, 1, null));
+
+    assertThat(sourceFileCoverage.getAllBranches())
+        .containsExactly(
+            BranchCoverage.create(21, 2),
+            BranchCoverage.create(23, 2),
+            BranchCoverage.create(24, 2),
+            BranchCoverage.create(27, 2),
+            BranchCoverage.create(30, 2),
+            BranchCoverage.create(32, 2),
+            BranchCoverage.create(33, 0),
+            BranchCoverage.create(35, 2));
+  }
+}