1 files changed, 72 insertions, 0 deletions
diff --git a/library/core/tests/num/flt2dec/strategy/grisu.rs b/library/core/tests/num/flt2dec/strategy/grisu.rs
new file mode 100644
index 000000000..b59a3b9b7
--- /dev/null
+++ b/library/core/tests/num/flt2dec/strategy/grisu.rs
@@ -0,0 +1,72 @@
+use super::super::*;
+use core::num::flt2dec::strategy::grisu::*;
+
+#[test]
+#[cfg_attr(miri, ignore)] // Miri is too slow
+fn test_cached_power() {
+    assert_eq!(CACHED_POW10.first().unwrap().1, CACHED_POW10_FIRST_E);
+    assert_eq!(CACHED_POW10.last().unwrap().1, CACHED_POW10_LAST_E);
+
+    for e in -1137..961 {
+        // full range for f64
+        let low = ALPHA - e - 64;
+        let high = GAMMA - e - 64;
+        let (_k, cached) = cached_power(low, high);
+        assert!(
+            low <= cached.e && cached.e <= high,
+            "cached_power({}, {}) = {:?} is incorrect",
+            low,
+            high,
+            cached
+        );
+    }
+}
+
+#[test]
+fn test_max_pow10_no_more_than() {
+    let mut prevtenk = 1;
+    for k in 1..10 {
+        let tenk = prevtenk * 10;
+        assert_eq!(max_pow10_no_more_than(tenk - 1), (k - 1, prevtenk));
+        assert_eq!(max_pow10_no_more_than(tenk), (k, tenk));
+        prevtenk = tenk;
+    }
+}
+
+#[test]
+fn shortest_sanity_test() {
+    f64_shortest_sanity_test(format_shortest);
+    f32_shortest_sanity_test(format_shortest);
+    more_shortest_sanity_test(format_shortest);
+}
+
+#[test]
+#[cfg_attr(miri, ignore)] // Miri is too slow
+fn exact_sanity_test() {
+    // See comments in dragon.rs's exact_sanity_test for why this test is
+    // ignored on MSVC
+    if !cfg!(target_env = "msvc") {
+        f64_exact_sanity_test(format_exact);
+    }
+    f32_exact_sanity_test(format_exact);
+}
+
+#[test]
+fn test_to_shortest_str() {
+    to_shortest_str_test(format_shortest);
+}
+
+#[test]
+fn test_to_shortest_exp_str() {
+    to_shortest_exp_str_test(format_shortest);
+}
+
+#[test]
+fn test_to_exact_exp_str() {
+    to_exact_exp_str_test(format_exact);
+}
+
+#[test]
+fn test_to_exact_fixed_str() {
+    to_exact_fixed_str_test(format_exact);
+}