1 files changed, 88 insertions, 0 deletions
diff --git a/third_party/rust/minimal-lexical/tests/number_tests.rs b/third_party/rust/minimal-lexical/tests/number_tests.rs
new file mode 100644
index 0000000000..947be394c9
--- /dev/null
+++ b/third_party/rust/minimal-lexical/tests/number_tests.rs
@@ -0,0 +1,88 @@
+use minimal_lexical::number::Number;
+
+#[test]
+fn is_fast_path_test() {
+    let mut number = Number {
+        exponent: -4,
+        mantissa: 12345,
+        many_digits: false,
+    };
+    assert_eq!(number.is_fast_path::<f32>(), true);
+    assert_eq!(number.is_fast_path::<f64>(), true);
+
+    number.exponent = -15;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), true);
+
+    number.exponent = -25;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), false);
+
+    number.exponent = 25;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), true);
+
+    number.exponent = 36;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), true);
+
+    number.exponent = 38;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), false);
+
+    number.mantissa = 1 << 25;
+    number.exponent = 0;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), true);
+
+    number.mantissa = 1 << 54;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), false);
+
+    number.mantissa = 1 << 52;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), true);
+
+    number.many_digits = true;
+    assert_eq!(number.is_fast_path::<f32>(), false);
+    assert_eq!(number.is_fast_path::<f64>(), false);
+}
+
+#[test]
+fn try_fast_path_test() {
+    let mut number = Number {
+        exponent: -4,
+        mantissa: 12345,
+        many_digits: false,
+    };
+    assert_eq!(number.try_fast_path::<f32>(), Some(1.2345));
+    assert_eq!(number.try_fast_path::<f64>(), Some(1.2345));
+
+    number.exponent = -10;
+    assert_eq!(number.try_fast_path::<f32>(), Some(1.2345e-6));
+    assert_eq!(number.try_fast_path::<f64>(), Some(1.2345e-6));
+
+    number.exponent = -20;
+    assert_eq!(number.try_fast_path::<f32>(), None);
+    assert_eq!(number.try_fast_path::<f64>(), Some(1.2345e-16));
+
+    number.exponent = -25;
+    assert_eq!(number.try_fast_path::<f32>(), None);
+    assert_eq!(number.try_fast_path::<f64>(), None);
+
+    number.exponent = 12;
+    assert_eq!(number.try_fast_path::<f32>(), Some(1.2345e16));
+    assert_eq!(number.try_fast_path::<f64>(), Some(1.2345e16));
+
+    number.exponent = 25;
+    assert_eq!(number.try_fast_path::<f32>(), None);
+    assert_eq!(number.try_fast_path::<f64>(), Some(1.2345e29));
+
+    number.exponent = 32;
+    assert_eq!(number.try_fast_path::<f32>(), None);
+    assert_eq!(number.try_fast_path::<f64>(), Some(1.2345e36));
+
+    number.exponent = 36;
+    assert_eq!(number.try_fast_path::<f32>(), None);
+    assert_eq!(number.try_fast_path::<f64>(), None);
+}