Fixing link for data tests (#6295)

website/docs/docs/build/data-tests.md

@@ -66,9 +66,25 @@ having total_amount < 0
 
 </File>
 
-The name of this test is the name of the file: `assert_total_payment_amount_is_positive`. Simple enough.
+The name of this test is the name of the file: `assert_total_payment_amount_is_positive`.
 
-Singular data tests are easy to write—so easy that you may find yourself writing the same basic structure over and over, only changing the name of a column or model. By that point, the test isn't so singular! In that case, we recommend...
+To add a data test to your project, add a `.yml` file to your `tests` directory, for example, `tests/schema.yml` with the following content:
+
+<File name='tests/schema.yml'>
+
+```yaml
+version: 2
+data_tests:
+  - name: assert_total_payment_amount_is_positive
+    description: >
+      Refunds have a negative amount, so the total amount should always be >= 0.
+      Therefore return records where total amount < 0 to make the test fail.
+
+```
+
+</File>
+
+Singular data tests are so easy that you may find yourself writing the same basic structure repeatedly, only changing the name of a column or model. By that point, the test isn't so singular! In that case, we recommend generic data tests.
 
 ## Generic data tests
 Certain data tests are generic: they can be reused over and over again. A generic data test is defined in a `test` block, which contains a parametrized query and accepts arguments. It might look like:

website/docs/docs/dbt-versions/core-upgrade/06-upgrading-to-v1.9.md

@@ -107,6 +107,6 @@ You can read more about each of these behavior changes in the following links:
 We also made some quality-of-life improvements in Core 1.9, enabling you to:
 
 - Maintain data quality now that dbt returns an an error (versioned models) or warning (unversioned models) when someone [removes a contracted model by deleting, renaming, or disabling](/docs/collaborate/govern/model-contracts#how-are-breaking-changes-handled) it.
-- Document [singular data tests](/docs/build/data-tests#document-singular-tests).
+- Document [singular data tests](/docs/build/data-tests#singular-data-tests).
 - Use `ref` and `source` in [foreign key constraints](/reference/resource-properties/constraints).
 - Use `dbt test` with the `--resource-type` / `--exclude-resource-type` flag, making it possible to include or exclude data tests (`test`) or unit tests (`unit_test`).