1 files changed, 20 insertions, 0 deletions
diff --git a/lulua/test_report.py b/lulua/test_report.py
new file mode 100644
index 0000000..816aa85
--- /dev/null
+++ b/lulua/test_report.py
@@ -0,0 +1,20 @@
+from decimal import Decimal
+
+from .report import approx
+
+def test_approx ():
+    assert approx (0) == (Decimal ('0'), '')
+    assert approx (0.01) == (Decimal ('0'), '')
+    assert approx (0.05) == (Decimal ('0.1'), '')
+    assert approx (1) == (Decimal ('1'), '')
+    assert approx (100) == (Decimal ('100'), '')
+    assert approx (999.9) == (Decimal ('999.9'), '')
+    assert approx (999.91) == (Decimal ('999.9'), '')
+    assert approx (999.99) == (Decimal ('1'), 'thousand')
+
+    assert approx (10**3) == (Decimal ('1'), 'thousand')
+    assert approx (10**6) == (Decimal ('1'), 'million')
+    assert approx (10**9) == (Decimal ('1'), 'billion')
+    assert approx (10**12) == (Decimal ('1000'), 'billion')
+
+