1 files changed, 57 insertions, 0 deletions
diff --git a/src/formats.test.ts b/src/formats.test.ts
new file mode 100644
index 0000000..fa22f07
--- /dev/null
+++ b/src/formats.test.ts
@@ -0,0 +1,57 @@
+import { defaultColorMatches } from "./formats";
+
+describe("Color matcher", () => {
+  it.each`
+    n      | s1     | s2    | expected
+    ${100} | ${75}  | ${50} | ${"0f0"}
+    ${75}  | ${75}  | ${50} | ${"0f0"}
+    ${50}  | ${75}  | ${50} | ${"ff0"}
+    ${0}   | ${75}  | ${50} | ${"f00"}
+    ${51}  | ${51}  | ${50} | ${"0f0"}
+    ${50}  | ${51}  | ${50} | ${"ff0"}
+    ${0}   | ${50}  | ${1}  | ${"f00"}
+    ${100} | ${100} | ${0}  | ${"0f0"}
+    ${0}   | ${100} | ${0}  | ${"ff0"}
+    ${75}  | ${75}  | ${60} | ${"0f0"}
+    ${74}  | ${75}  | ${60} | ${"1f0"}
+    ${73}  | ${75}  | ${60} | ${"2f0"}
+    ${72}  | ${75}  | ${60} | ${"3f0"}
+    ${71}  | ${75}  | ${60} | ${"4f0"}
+    ${70}  | ${75}  | ${60} | ${"5f0"}
+    ${69}  | ${75}  | ${60} | ${"6f0"}
+    ${68}  | ${75}  | ${60} | ${"7f0"}
+    ${67}  | ${75}  | ${60} | ${"8f0"}
+    ${66}  | ${75}  | ${60} | ${"9f0"}
+    ${65}  | ${75}  | ${60} | ${"af0"}
+    ${64}  | ${75}  | ${60} | ${"bf0"}
+    ${63}  | ${75}  | ${60} | ${"cf0"}
+    ${62}  | ${75}  | ${60} | ${"df0"}
+    ${61}  | ${75}  | ${60} | ${"ef0"}
+    ${60}  | ${75}  | ${60} | ${"ff0"}
+    ${15}  | ${75}  | ${15} | ${"ff0"}
+    ${14}  | ${75}  | ${15} | ${"fe0"}
+    ${13}  | ${75}  | ${15} | ${"fd0"}
+    ${12}  | ${75}  | ${15} | ${"fc0"}
+    ${11}  | ${75}  | ${15} | ${"fb0"}
+    ${10}  | ${75}  | ${15} | ${"fa0"}
+    ${9}   | ${75}  | ${15} | ${"f90"}
+    ${8}   | ${75}  | ${15} | ${"f80"}
+    ${7}   | ${75}  | ${15} | ${"f70"}
+    ${6}   | ${75}  | ${15} | ${"f60"}
+    ${5}   | ${75}  | ${15} | ${"f50"}
+    ${4}   | ${75}  | ${15} | ${"f40"}
+    ${3}   | ${75}  | ${15} | ${"f30"}
+    ${2}   | ${75}  | ${15} | ${"f20"}
+    ${1}   | ${75}  | ${15} | ${"f10"}
+    ${0}   | ${75}  | ${15} | ${"f00"}
+  `("should return $expected at $n%", ({ n, s1, s2, expected }) => {
+    // Arrange
+    const gradient = { stage1: s1, stage2: s2 };
+
+    // Act
+    const result = defaultColorMatches(n, gradient);
+
+    // Assert
+    expect(result).toEqual(expected);
+  });
+});