colors.contrast: implement WCAG color contrast ratio

[factor.git] / extra / colors / contrast / contrast-tests.factor

diff --git a/extra/colors/contrast/contrast-tests.factor b/extra/colors/contrast/contrast-tests.factor
new file mode 100644 (file)
index 0000000..f6c59bf
--- /dev/null
+++ b/extra/colors/contrast/contrast-tests.factor
@@ -0,0 +1,7 @@
+USING: colors colors.contrast kernel tools.test ;
+
+{ 0.0 } [ COLOR: black relative-luminance ] unit-test
+{ 1.0 } [ COLOR: white relative-luminance ] unit-test
+
+{ 1.0 } [ COLOR: blue dup contrast-ratio ] unit-test
+{ 21.0 } [ COLOR: black COLOR: white contrast-ratio ] unit-test