1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java b/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java
index b5eedb2e90..20a70843f8 100644
--- a/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java
+++ b/src/test/java/com/google/devtools/build/lib/syntax/ParserTest.java
@@ -120,6 +120,35 @@ public class ParserTest extends EvaluationTestCase {
   }
 
   @Test
+  public void testNonAssociativeOperators() throws Exception {
+    setFailFast(false);
+
+    parseExpression("0 < 2 < 4");
+    assertContainsError("Operator '<' is not associative with operator '<'");
+    clearEvents();
+
+    parseExpression("0 == 2 < 4");
+    assertContainsError("Operator '==' is not associative with operator '<'");
+    clearEvents();
+
+    parseExpression("1 in [1, 2] == True");
+    assertContainsError("Operator 'in' is not associative with operator '=='");
+    clearEvents();
+
+    parseExpression("1 >= 2 <= 3");
+    assertContainsError("Operator '>=' is not associative with operator '<='");
+    clearEvents();
+  }
+
+  @Test
+  public void testNonAssociativeOperatorsWithParens() throws Exception {
+    parseExpression("(0 < 2) < 4");
+    parseExpression("(0 == 2) < 4");
+    parseExpression("(1 in [1, 2]) == True");
+    parseExpression("1 >= (2 <= 3)");
+  }
+
+  @Test
   public void testUnaryMinusExpr() throws Exception {
     FuncallExpression e = (FuncallExpression) parseExpression("-5");
     FuncallExpression e2 = (FuncallExpression) parseExpression("- 5");