1 files changed, 121 insertions, 0 deletions
diff --git a/tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger/LcovMergerFlagsTest.java b/tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger/LcovMergerFlagsTest.java
new file mode 100644
index 0000000000..47ff4ef0cc
--- /dev/null
+++ b/tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger/LcovMergerFlagsTest.java
@@ -0,0 +1,121 @@
+// 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 org.junit.Test;
+
+public class LcovMergerFlagsTest {
+  @Test
+  public void parseFlagsTestCoverageDirOutputFile() {
+    LcovMergerFlags flags =
+        LcovMergerFlags.parseFlags(
+            new String[] {
+              "--coverage_dir=my_dir", "--output_file=my_file",
+            });
+    assertThat(flags.coverageDir()).isEqualTo("my_dir");
+    assertThat(flags.outputFile()).isEqualTo("my_file");
+    assertThat(flags.reportsFile()).isNull();
+    assertThat(flags.filterSources()).isEmpty();
+  }
+
+  @Test
+  public void parseFlagsTestReportsFileOutputFile() {
+    LcovMergerFlags flags =
+        LcovMergerFlags.parseFlags(
+            new String[] {
+              "--reports_file=my_reports_file", "--output_file=my_file",
+            });
+    assertThat(flags.reportsFile()).isEqualTo("my_reports_file");
+    assertThat(flags.outputFile()).isEqualTo("my_file");
+    assertThat(flags.coverageDir()).isNull();
+    assertThat(flags.filterSources()).isEmpty();
+  }
+
+  @Test
+  public void parseFlagsTestReportsFileOutputFileFilterSources() {
+    LcovMergerFlags flags =
+        LcovMergerFlags.parseFlags(
+            new String[] {
+              "--reports_file=my_reports_file",
+              "--output_file=my_file",
+              "--filter_sources=first_filter"
+            });
+    assertThat(flags.reportsFile()).isEqualTo("my_reports_file");
+    assertThat(flags.outputFile()).isEqualTo("my_file");
+    assertThat(flags.coverageDir()).isNull();
+    assertThat(flags.filterSources()).containsExactly("first_filter");
+  }
+
+  @Test
+  public void parseFlagsTestReportsFileOutputFileMultipleFilterSources() {
+    LcovMergerFlags flags =
+        LcovMergerFlags.parseFlags(
+            new String[] {
+              "--reports_file=my_reports_file",
+              "--output_file=my_file",
+              "--filter_sources=first_filter",
+              "--filter_sources=second_filter"
+            });
+    assertThat(flags.reportsFile()).isEqualTo("my_reports_file");
+    assertThat(flags.outputFile()).isEqualTo("my_file");
+    assertThat(flags.coverageDir()).isNull();
+    assertThat(flags.filterSources()).containsExactly("first_filter", "second_filter");
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void parseFlagsTestCoverageDirAndReportsFile() {
+    LcovMergerFlags.parseFlags(
+        new String[] {"--reports_file=my_reports_file", "--coverage_dir=my_coverage_dir"});
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void parseFlagsTestEmptyFlags() {
+    LcovMergerFlags.parseFlags(new String[] {});
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void parseFlagsTestNoOutputFile() {
+    LcovMergerFlags.parseFlags(
+        new String[] {
+          "--reports_file=my_reports_file",
+        });
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void parseFlagsTestUnknownFlag() {
+    LcovMergerFlags.parseFlags(
+        new String[] {
+          "--fake_flag=my_reports_file",
+        });
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void parseFlagsTestInvalidFlagValue() {
+    LcovMergerFlags.parseFlags(
+        new String[] {
+          "--reports_file", "--output_file=my_file",
+        });
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void parseFlagsTestInvalidFlagValueWithoutDashes() {
+    LcovMergerFlags.parseFlags(
+        new String[] {
+          "reports_file", "--output_file=my_file",
+        });
+  }
+}