add unit tests for Note.oct and String.asNote

This should serve as a starting point for other unit tests.

wslib-tests/TestExtVariousAsNote.sc

@@ -0,0 +1,29 @@
+TestStringExtVariousAsNote : UnitTest {
+	setUp {
+	}
+
+	tearDown {
+	}
+
+	test_asNote {
+		[
+			["B1",  47],
+			["C2",  48],
+			["C#2", 49],
+			["B2",  59],
+			["C3",  60],
+			["C#3", 61],
+			["B3",  71],
+		].do { |pair|
+			var in = pair[0], expected = pair[1];
+			var got = in.asNote;
+			this.assertEquals(got.class, Note);
+			this.assertEquals(got.midi, expected);
+		};
+	}
+}
+
+// To test, use one of the following approaches:
+//
+//   UnitTest.gui;
+//   UnitTest.runTest("TestExtVariousAsNote:test_asNote");

wslib-tests/TestNote.sc

@@ -0,0 +1,25 @@
+TestNote : UnitTest {
+	setUp {
+	}
+
+	tearDown {
+	}
+
+	test_oct {
+		[
+			["C3",  3],
+			["Cb3", 2],
+			["B#4", 5],
+		].do { |pair|
+			var in = pair[0], expected = pair[1];
+			var got = in.asNote;
+			this.assertEquals(got.oct, expected);
+		};
+	}
+}
+
+// To test, use one of the following approaches:
+//
+//   UnitTest.gui;
+//   UnitTest.runTestClassForClass(Note);
+//   UnitTest.runTest("TestNote:test_oct");