1 files changed, 110 insertions, 0 deletions
diff --git a/scss/tests/test_types.py b/scss/tests/test_types.py
new file mode 100644
index 0000000..b55c5f2
--- /dev/null
+++ b/scss/tests/test_types.py
@@ -0,0 +1,110 @@
+"""Tests for the type system."""
+
+from scss.types import Color, Null, Number, String
+
+import pytest
+
+
+# Operators: arithmetic (+ - * / %), unary (+ -), comparison (== != < > <= >=), boolean
+# Types: numbers, colors, strings, booleans, lists
+# Test them all!
+
+def test_addition():
+    assert Number(123) + Number(456) == Number(579)
+
+    assert Number(1, "px") + Number(2, "px") == Number(3, "px")
+
+    assert Number(123) + String('abc') == String('123abc')
+    assert String('abc') + Number(123) == String('abc123')
+
+    ret = String('abc', quotes=None) + String('def', quotes=None)
+    assert ret == String('abcdef')
+    assert ret.quotes is None
+
+    ret = String('abc', quotes='"') + String('def', quotes=None)
+    assert ret == String('abcdef')
+    assert ret.quotes is '"'
+
+    ret = String('abc', quotes=None) + String('def', quotes='"')
+    assert ret == String('abcdef')
+    assert ret.quotes is None
+
+    assert Color.from_hex('#010305') + Color.from_hex('#050301') == Color.from_hex('#060606')
+    assert Color.from_name('white') + Color.from_name('white') == Color.from_name('white')
+
+
+def test_subtraction():
+    assert Number(123) - Number(456) == Number(-333)
+    assert Number(456) - Number(123) == Number(333)
+    # TODO test that subtracting e.g. strings doesn't work
+
+    assert Color.from_hex('#0f0f0f') - Color.from_hex('#050505') == Color.from_hex('#0a0a0a')
+
+
+def test_division():
+    assert Number(5, "px") / Number(5, "px") == Number(1)
+    assert Number(1, "in") / Number(6, "pt") == Number(12)
+
+
+def test_comparison_numeric():
+    lo = Number(123)
+    hi = Number(456)
+    assert lo < hi
+    assert lo <= hi
+    assert lo <= lo
+    assert hi > lo
+    assert hi >= lo
+    assert hi >= hi
+    assert lo == lo
+    assert lo != hi
+
+    # Same tests, negated
+    assert not lo > hi
+    assert not lo >= hi
+    assert not hi < lo
+    assert not hi <= lo
+    assert not lo != lo
+    assert not lo == hi
+
+
+def test_comparison_stringerific():
+    abc = String('abc')
+    xyz = String('xyz')
+
+    assert abc == abc
+    assert abc != xyz
+    assert not abc == xyz
+    assert not abc != abc
+
+    # Interaction with other types
+    assert Number(123) != String('123')
+    assert String('123') != Number(123)
+
+    # Sass strings don't support ordering
+    with pytest.raises(TypeError):
+        abc < xyz
+
+    with pytest.raises(TypeError):
+        abc <= xyz
+
+    with pytest.raises(TypeError):
+        abc > xyz
+
+    with pytest.raises(TypeError):
+        abc >= xyz
+
+    with pytest.raises(TypeError):
+        Number(123) < String('123')
+
+
+def test_comparison_null():
+    null = Null()
+
+    assert null == null
+    assert null != Number(0)
+
+    with pytest.raises(TypeError):
+        null < null
+
+
+# TODO write more!  i'm lazy.