Move test code into a separate directory

Closes #15

Author: sio

Docs/Modules.md

@@ -126,8 +126,8 @@ All modules are grouped into namespaces, much like the standard library:
 [Table.NumberColumns]: ../Modules/Table.NumberColumns.pq
 [Table.PromoteHeadersNonEmpty]: ../Modules/Table.PromoteHeadersNonEmpty.pq
 [Table.UseLastValid]: ../Modules/Table.UseLastValid.pq
-[Tests.ConcatenateRows]: ../Modules/Tests.ConcatenateRows.pq
-[Tests.UseLastValid]: ../Modules/Tests.UseLastValid.pq
+[Tests.ConcatenateRows]: ../Tests/Tests.ConcatenateRows.pq
+[Tests.UseLastValid]: ../Tests/Tests.UseLastValid.pq
 [UnitTest.Assert]: ../Modules/UnitTest.Assert.pq
 [UnitTest.Constants]: ../Modules/UnitTest.Constants.pq
 [UnitTest.Discover]: ../Modules/UnitTest.Discover.pq

Docs/UnitTesting_with_Facts.md

@@ -75,4 +75,4 @@ described previously in this article).
 [Fact]: ../Modules/UnitTest.Fact.pq
 [Facts.Summarize]: ../Modules/UnitTest.Facts.Summarize.pq
 [UnitTest.Discover]: ../Modules/UnitTest.Discover.pq
-[sample test]: ../Modules/Tests.MicrosoftUnitTestDemo.pq
+[sample test]: ../Tests/Tests.MicrosoftUnitTestDemo.pq

LibPQPath-sample.pq

@@ -10,10 +10,12 @@ LibPQPath:
 [
     Local = {
         "C:\ExtractLocation\LibPQ\Modules",
-        "D:\ExtractLocation\LibPQ\Modules"
+        "C:\ExtractLocation\LibPQ\Tests",
+        "D:\ExtractLocation\LibPQ\Modules",
+        "D:\ExtractLocation\LibPQ\Tests"
     },
     Web = {
         "https://raw.githubusercontent.com/sio/LibPQ/master/Modules/",
         "https://raw.githubusercontent.com/tycho01/pquery/master/"
     }
-]
+]

Tests/README.md

@@ -0,0 +1,12 @@
+# Unit tests for LibPQ
+
+This directory contains test suites for LibPQ.
+
+To run these tests:
+
+- [Install LibPQ](../README.md#installation-and-usage)
+- Make sure this directory is listed in `LibPQPath`
+- Execute `LibPQ("UnitTest.Discover")()`
+
+To learn more about unit testing in Power Query refer to
+[LibPQ documentation](../Docs/UnitTesting.md).