From 6f34f42bced285c513e35ec28526db274228240c Mon Sep 17 00:00:00 2001
From: Mike Bostock <mbostock@gmail.com>
Date: Mon, 2 Sep 2019 09:23:37 -0700
Subject: [PATCH] More tests.

---
 test/radial-test.js | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/test/radial-test.js b/test/radial-test.js
index 5a1e5f2..762d66c 100644
--- a/test/radial-test.js
+++ b/test/radial-test.js
@@ -27,7 +27,7 @@ tape("scaleRadial(domain, range) sets the range", function(test) {
 });
 
 tape("radial(x) maps a domain value x to a range value y", function(test) {
-  test.equal(scale.scaleRadial().range([1, 2])(0.5), 1.5811388300841898);
+  test.equal(scale.scaleRadial([1, 2])(0.5), 1.5811388300841898);
   test.end();
 });
 
@@ -78,3 +78,15 @@ tape("radial.unknown(unknown)(NaN) returns the specified unknown value", functio
   test.strictEqual(scale.scaleRadial().unknown("foo")(NaN), "foo");
   test.end();
 });
+
+tape("radial(x) can handle a negative range", function(test) {
+  test.equal(scale.scaleRadial([-1, -2])(0.5), -1.5811388300841898);
+  test.end();
+});
+
+tape("radial(x) can clamp negative values", function(test) {
+  test.equal(scale.scaleRadial([-1, -2]).clamp(true)(-0.5), -1);
+  test.equal(scale.scaleRadial().clamp(true)(-0.5), 0);
+  test.equal(scale.scaleRadial([-0.25, 0], [1, 2]).clamp(true)(-0.5), 1);
+  test.end();
+});