GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/1879
SPARK-2955 [BUILD] Test code fails to compile with "mvn compile" without
"install"
(This is the corrected follow-up to
https://issues.apache.org/jira/browse/SPARK-2903)
Right now, `mvn compile test-compile` fails to compile Spark. (Don't worry;
`mvn package` works, so this is not major.) The issue stems from test code in
some modules depending on test code in other modules. That is perfectly fine
and supported by Maven.
It takes extra work to get this to work with scalatest, and this has been
attempted: https://github.com/apache/spark/blob/master/sql/catalyst/pom.xml#L86
This formulation is not quite enough, since the SQL Core module's tests
fail to compile for lack of finding test classes in SQL Catalyst, and likewise
for most Streaming integration modules depending on core Streaming test code.
Example:
```
[error]
/Users/srowen/Documents/spark/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala:23:
not found: type PlanTest
[error] class QueryTest extends PlanTest {
[error] ^
[error]
/Users/srowen/Documents/spark/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala:28:
package org.apache.spark.sql.test is not a value
[error] test("SPARK-1669: cacheTable should be idempotent") {
[error] ^
...
```
The issue I believe is that generation of a `test-jar` is bound here to the
`compile` phase, but the test classes are not being compiled in this phase. It
should bind to the `test-compile` phase.
It works when executing `mvn package` or `mvn install` since test-jar
artifacts are actually generated available through normal Maven mechanisms as
each module is built. They are then found normally, regardless of scalatest
configuration.
It would be nice for a simple `mvn compile test-compile` to work since the
test code is perfectly compilable given the Maven declarations.
On the plus side, this change is low-risk as it only affects tests.
@yhuai made the original scalatest change and has glanced at this and
thinks it makes sense.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-2955
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/1879.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1879
----
commit ad8242f124ced3779055a24744163091580b001d
Author: Sean Owen <[email protected]>
Date: 2014-08-07T22:16:28Z
Generate test-jar on test-compile for modules whose tests are needed by
others' tests
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