assertProblemFree(collector);

        assertEquals("${env.DOES_NOT_EXIST}", out.getProperties().get("outputDirectory"));
    }

    @Test
    public void expressionThatEvaluatesToNullReturnsTheLiteralString() throws Exception {
        Map<String, String> modelProperties = new HashMap<>();
        modelProperties.put("outputDirectory", "${DOES_NOT_EXIST}");

		{"----", "dir/obj", BucketNameInvalid{Bucket: "----"}},
		{"bucket", "", ObjectNameInvalid{Bucket: "bucket", Object: ""}},
		{"bucket", "doesnotexist", ObjectNotFound{Bucket: "bucket", Object: "doesnotexist"}},
		{"bucket", "dir/doesnotexist", ObjectNotFound{Bucket: "bucket", Object: "dir/doesnotexist"}},
		{"bucket", "dir", ObjectNotFound{Bucket: "bucket", Object: "dir"}},
		{"bucket", "dir/", ObjectNotFound{Bucket: "bucket", Object: "dir/"}},

          <!-- The above exclusion doesn't actually matter unless I prevent Javadoc from autodiscovering the source in the sourcepath, which defaults to the source directory :\ Boo for -sourcepath. -->
          <sourcepath>doesnotexist</sourcepath>

                      (Compare what guava-gwt has to do for maven-javadoc-plugin.)
                  -->
                  <arg>-sourcepath</arg>
                  <arg>doesnotexist</arg>
                </compilerArgs>
              </configuration>
            </execution>
            <execution>
              <id>default-testCompile</id>
              <configuration>

  * More expressive node affinity syntax, and support for “soft” node affinity.
Node selectors (to constrain pods to schedule on a subset of nodes) now support
the operators {<code>In, NotIn, Exists, DoesNotExist, Gt, Lt</code>}  instead of just conjunction of exact match on node label values. In
addition, we’ve introduced a new “soft” kind of node selector that is just a