1 files changed, 69 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/excessive_precision.rs b/src/tools/clippy/tests/ui/excessive_precision.rs
new file mode 100644
index 000000000..6e84a71f2
--- /dev/null
+++ b/src/tools/clippy/tests/ui/excessive_precision.rs
@@ -0,0 +1,69 @@
+// run-rustfix
+#![warn(clippy::excessive_precision)]
+#![allow(dead_code, unused_variables, clippy::print_literal)]
+
+fn main() {
+    // Consts
+    const GOOD32: f32 = 0.123_456;
+    const GOOD32_SM: f32 = 0.000_000_000_1;
+    const GOOD32_DOT: f32 = 10_000_000_000.0;
+    const GOOD32_EDGE: f32 = 1.000_000_8;
+    const GOOD64: f64 = 0.123_456_789_012;
+    const GOOD64_SM: f32 = 0.000_000_000_000_000_1;
+    const GOOD64_DOT: f32 = 10_000_000_000_000_000.0;
+
+    const BAD32_1: f32 = 0.123_456_789_f32;
+    const BAD32_2: f32 = 0.123_456_789;
+    const BAD32_3: f32 = 0.100_000_000_000_1;
+    const BAD32_EDGE: f32 = 1.000_000_9;
+
+    const BAD64_1: f64 = 0.123_456_789_012_345_67f64;
+    const BAD64_2: f64 = 0.123_456_789_012_345_67;
+    const BAD64_3: f64 = 0.100_000_000_000_000_000_1;
+
+    // Literal as param
+    println!("{:?}", 8.888_888_888_888_888_888_888);
+
+    // // TODO add inferred type tests for f32
+    // Locals
+    let good32: f32 = 0.123_456_f32;
+    let good32_2: f32 = 0.123_456;
+
+    let good64: f64 = 0.123_456_789_012;
+    let good64_suf: f64 = 0.123_456_789_012f64;
+    let good64_inf = 0.123_456_789_012;
+
+    let bad32: f32 = 1.123_456_789;
+    let bad32_suf: f32 = 1.123_456_789_f32;
+    let bad32_inf = 1.123_456_789_f32;
+
+    let bad64: f64 = 0.123_456_789_012_345_67;
+    let bad64_suf: f64 = 0.123_456_789_012_345_67f64;
+    let bad64_inf = 0.123_456_789_012_345_67;
+
+    // Vectors
+    let good_vec32: Vec<f32> = vec![0.123_456];
+    let good_vec64: Vec<f64> = vec![0.123_456_789];
+
+    let bad_vec32: Vec<f32> = vec![0.123_456_789];
+    let bad_vec64: Vec<f64> = vec![0.123_456_789_123_456_789];
+
+    // Exponential float notation
+    let good_e32: f32 = 1e-10;
+    let bad_e32: f32 = 1.123_456_788_888e-10;
+
+    let good_bige32: f32 = 1E-10;
+    let bad_bige32: f32 = 1.123_456_788_888E-10;
+
+    // Inferred type
+    let good_inferred: f32 = 1f32 * 1_000_000_000.;
+
+    // issue #2840
+    let num = 0.000_000_000_01e-10f64;
+
+    // issue #7744
+    let _ = 2.225_073_858_507_201_1e-308_f64;
+
+    // issue #7745
+    let _ = 1.000_000_000_000_001e-324_f64;
+}