1 files changed, 54 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/actions/SingleStringArgFormatterTest.java b/src/test/java/com/google/devtools/build/lib/actions/SingleStringArgFormatterTest.java
new file mode 100644
index 0000000000..2c042a66c2
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/actions/SingleStringArgFormatterTest.java
@@ -0,0 +1,54 @@
+// 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.build.lib.actions;
+
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.devtools.build.lib.actions.SingleStringArgFormatter.format;
+import static com.google.devtools.build.lib.actions.SingleStringArgFormatter.isValid;
+
+import com.google.devtools.build.lib.testutil.MoreAsserts;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Tests for {@link SingleStringArgFormatter} */
+@RunWith(JUnit4.class)
+public class SingleStringArgFormatterTest {
+
+  @Test
+  public void testValidate() {
+    assertThat(isValid("hello %s")).isTrue();
+    assertThat(isValid("%s hello")).isTrue();
+    assertThat(isValid("hello %%s")).isFalse();
+    assertThat(isValid("hello %%s %s")).isTrue();
+    assertThat(isValid("hello %s %%s")).isTrue();
+    assertThat(isValid("hello %s %s")).isFalse();
+    assertThat(isValid("%s hello %s")).isFalse();
+    assertThat(isValid("hello %")).isFalse();
+    assertThat(isValid("hello %f")).isFalse();
+    assertThat(isValid("hello %s %f")).isFalse();
+    assertThat(isValid("hello %s %")).isFalse();
+  }
+
+  @Test
+  public void testFormat() {
+    assertThat(format("hello %s", "world")).isEqualTo("hello world");
+    assertThat(format("%s hello", "world")).isEqualTo("world hello");
+    assertThat(format("hello %s, hello", "world")).isEqualTo("hello world, hello");
+    assertThat(format("hello %s, hello", "world")).isEqualTo("hello world, hello");
+    assertThat(format("hello %%s %s", "world")).isEqualTo("hello %%s world");
+    MoreAsserts.assertThrows(IllegalArgumentException.class, () -> format("hello", "hello"));
+    MoreAsserts.assertThrows(IllegalArgumentException.class, () -> format("hello %s %s", "hello"));
+  }
+}