Add notes on test coverage

Signed-off-by: Steve Winslow <swinslow@gmail.com>
spdx · Mar 6, 2019 · 3dcceb5 · 3dcceb5
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diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -6,6 +6,14 @@ All contributions must include a "Signed-off-by" line in the commit message.
 
 This indicates that the contribution is made pursuant to the [Developer Certificate of Origin (DCO)](https://developercertificate.org/), a copy of which is included below.
 
+## Test coverage
+
+Since this library is intended to be relied upon by other tools to work with SPDX data, we are aiming to ensure that it is and remains well-tested. 
+
+PRs with new code should include corresponding test files, and should continue to pass existing tests. Unit tests for `foo.go` should be placed in `foo_test.go`. Test data files and folders should be placed in the top-level `testdata/` folder.
+
+To run the test suite, from the top-level directory run: `go test ./v0/...`
+
 ## License information
 
 New **code files** should include a [short-form SPDX ID](https://spdx.org/ids) at the top, indicating the project license for code, which is Apache-2.0 OR GPL-2.0-or-later. This should look like the following: